Dacryocystitis surgery stepswise

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dacryocystorhinostomy DCR surgery steps

Two-panel clinical photograph and illustration detailing steps of an endonasal dacryocystorhinostomy (DCR). The top panel is a clinical photograph showing an intraoperative view of the nasal cavity during a surgical procedure. A straight Blakesley forceps is seen with its jaws firmly grasping a mucosal flap on the lateral nasal wall, anterior to the middle turbinate. The operative field is illuminated by a transillumination light probe, highlighting the reddish-pink, vascularized soft tissue and the metallic surgical instrument. The bottom panel provides a schematic representation or endoscopically-guided visualization framed within a dark circular border. This image shows the surgical target area on the nasal mucosa, marked with distinct dark red dotted lines and linear patterns. These markings serve as anatomical guides for the intended mucosal incision or bone removal sites, such as the lacrimal fossa. The background shows characteristic mucosal folds and reflective surfaces typical of the intranasal environment. This visual content illustrates the precise tissue manipulation and preoperative mapping required for successful lacrimal sac exposure in ophthalmic surgery.

This composite educational image illustrates the key surgical steps of an endonasal dacryocystorhinostomy (DCR). Panel A is a clinical photograph showing transillumination of the lateral nasal wall, achieved by a light probe inserted through the canaliculus into the lacrimal sac. Panel B is a corresponding anatomical diagram labeling the spatial relationship between the 'Light Probe' (entering via the upper canaliculus) and the 'Keratome' used to incise the medial wall of the lacrimal sac. Panels C and D provide intraoperative endoscopic views using a nasal speculum. Panel C depicts the incision of the nasal mucosa and exposure of the lacrimal fossa, while Panel D shows the subsequent lacrimal sac flap removal and excision using forceps. The series demonstrates the use of transillumination as a guide for precise osteotomy and sac incision in ophthalmologic and ENT surgery for treating nasolacrimal duct obstruction.

This clinical photograph consists of two panels illustrating steps in an endonasal dacryocystorhinostomy (DCR) procedure. The top panel shows an intraoperative view of the eye where a 20-gauge vitrectomy light probe is being inserted into the superior punctum and upper canaliculus. The probe, a slender metallic instrument with a rounded tip, is directed towards the medial canthal region to reach the lacrimal sac. The lower panel shows a close-up of the periocular region, highlighting the lower eyelid margin and eyelashes. The skin exhibits mild erythema and localized irritation near the medial canthus, consistent with the surgical site or preoperative inflammatory changes. Small, punctate marks are visible on the skin of the lower lid, potentially related to surgical marking or minor trauma. This visual material serves as an educational guide for ophthalmology and otolaryngology students to understand the positioning of transillumination tools used to localize the lacrimal sac during lacrimal bypass surgery.

This composite figure illustrates the surgical steps and outcomes of a modified endoscopic dacryocystorhinostomy (DCR) for treating nasolacrimal duct obstruction. Panel A shows the initial surgical field within the nasal cavity after application of vasoconstrictors. Panel B displays the creation of a 'C'-shaped mucosal and lacrimal sac incision near the lateral bone window, highlighted with an orange curve. Panel C depicts the intraoperative application of a white, porous gelatin sponge at the anastomosis site of the lacrimal sac and nasal mucosa, used as an alternative to suturing. Panel D shows the placement of a conical expansion sponge into the newly created ostium using surgical forceps. Panel E is a coronal dacryocystorhinography (DCRG) image showing a contrast-filled right lacrimal system, confirming patency and appropriate drainage into the nasal cavity. Panel F provides an ex vivo view of the conical expansion sponge next to a surgical ruler for scale, illustrating its tapered shape and attached retrieval string. This educational material is designed for ophthalmology and otolaryngology training, focusing on minimally invasive techniques for lacrimal bypass surgery.

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I now have all the information needed for a comprehensive, stepwise answer on dacryocystitis surgery (DCR). Here is the full guide:

Dacryocystitis Surgery: Dacryocystorhinostomy (DCR) - Step by Step

The definitive surgical treatment for dacryocystitis (both acute after resolution and chronic) is Dacryocystorhinostomy (DCR) - a bypass from the lacrimal sac directly into the nasal cavity, bypassing the obstructed nasolacrimal duct. It can be performed via two main routes: External DCR (classic) or Endoscopic (Endonasal) DCR.

INDICATIONS

Chronic dacryocystitis with nasolacrimal duct obstruction (primary indication)
Acute dacryocystitis - DCR is performed after the acute infection is controlled
Persistent mucocoele
Lacrimal sac fistula closure
Failed probing and syringing (especially in adults)

EXTERNAL DCR (Classic Approach)

Step 1 - Anesthesia & Positioning

General or local anesthesia (LA with sedation)
Patient supine, head slightly elevated (~20 degrees)
Nasal packing with epinephrine-soaked pledgets for vasoconstriction
Local injection: 1% lidocaine with 1:100,000 epinephrine at planned incision site

Step 2 - Skin Incision

A curvilinear skin incision is made 10-12 mm medial to the medial canthus, starting just below the medial canthal tendon and extending inferiorly (~12-15 mm)
Alternatively, the Lynch incision (curved along the side of the nose) is used
Incision deepens through skin, subcutaneous tissue, and orbicularis oculi

Step 3 - Periosteal Elevation & Exposure of Lacrimal Fossa

The angular vessels are identified and either retracted or ligated/cauterized
The medial canthal tendon is identified and may be partially detached
Periosteum is incised anterior to the anterior lacrimal crest and elevated with a periosteal elevator
The lacrimal fossa is exposed, revealing the lacrimal sac within its bony fossa

Step 4 - Osteotomy (Bone Window Creation)

The thin lacrimal bone is perforated using a bone punch, gouge, or drill
The osteotomy is enlarged using bone rongeurs (Hajek-Koeffler punch)
The window should be at least 15 x 10 mm to ensure adequate drainage
The osteotomy extends from the lacrimal crest anteriorly into the ethmoid air cells posteriorly
The nasal mucosa is now visible through the bony window

Step 5 - Lacrimal Sac Cannulation & Incision

The superior and inferior puncta are dilated with a lacrimal dilator
A Bowman probe (size 00) is passed through the inferior canaliculus - directed horizontally, then superiorly into the lacrimal sac
The sac is tented by the probe to guide safe incision
The lacrimal sac is incised with a No. 11 or No. 15 blade to create anterior and posterior flaps (H-shaped or cruciate incision)

Step 6 - Nasal Mucosal Flaps

A corresponding H-shaped incision is made in the nasal mucosa opposite the sac opening
Anterior and posterior nasal mucosal flaps are created and reflected

Step 7 - Flap Anastomosis

Posterior flaps of the lacrimal sac and nasal mucosa are sutured together first with absorbable sutures (5-0 Vicryl)
Anterior flaps are then approximated similarly
This creates a wide mucosal-lined anastomosis between the lacrimal sac and nasal cavity

Step 8 - Silicone Intubation (Optional but Common)

Bicanalicular silicone stents (e.g., O'Donoghue tubes) are passed through both puncta, down through the new ostium, and retrieved from the nose
Secured with a clip or knot inside the nose
Left in place for 4-6 weeks (up to 6-9 months if canalicular stenosis is present)
Indication: tight common canaliculus, revision DCR, functional obstruction

Step 9 - Wound Closure

Periosteum is closed with absorbable suture if possible
Skin closed in layers with interrupted or subcuticular sutures (6-0 nylon or Prolene)
Nasal pack may be placed for 24-48 hours

ENDOSCOPIC (ENDONASAL) DCR

This approach avoids a facial scar and preserves the lacrimal pump mechanism. It is the preferred approach in many centres for primary and revision DCR.

Step 1 - Operating Room Setup & Preparation

Ergonomics are critical: head extension, side-to-side mobility, monitor across from surgeon
30-degree endoscope used, aimed superolaterally
Hemostasis: head elevated 30°, reduced cardiac output, injection of 1% lidocaine with 1:100,000 epinephrine, topical 1:1000 epinephrine neuropatties
High endoscopic septoplasty performed in ~50% of cases when the axilla of the middle turbinate is not fully visible

Step 2 - Nasal Mucosal Flap Elevation

A posteriorly pedicled mucoperiosteal flap is created with a No. 15 blade and a sharp-suction Freer elevator
Flap dimensions: superior margin 5 mm posterior to middle turbinate insertion and 10 mm above the axilla; inferior limit 10 mm anterior to the uncinate at the superior edge of the inferior turbinate
The flap must be aggressively mobilized off the axilla of the middle turbinate to allow adequate superior and posterior bone removal
Flap is rolled back over the middle turbinate

Step 3 - Bone Removal (Osteotomy / "Saucerization")

The frontal process of the maxilla covering the anterior lacrimal sac is removed with a forward-biting rongeur (4-mm Hajek-Koeffler or Kerrison punch)
The initial purchase is created by disarticulating the lacrimal bone laterally along the maxillo-lacrimal suture
The agger nasi is usually opened as bone removal proceeds
A DCR drill bit is then used to "saucerize" remaining bone until a hemisphere of the lacrimal sac sits "proud" on the saucerized bone surface - this ensures the sac flaps can lie open and not curl inward during healing
A round knife flakes off the lacrimal bone from the posterior sac surface

Step 4 - Cannulation

The superior and inferior puncta are dilated and cannulated with Bowman probes
A 00 probe is passed through the inferior canaliculus, directed horizontally and slightly posteriorly, then superiorly into the lacrimal sac
The probe tents the medial wall of the sac, confirming its location against the bony window

Step 5 - Marsupialization of the Lacrimal Sac

A spear knife is used to open the lacrimal sac vertically from top to bottom
A ball probe is placed through the medial sac wall incision to confirm adequacy of bone removal
The posterior flap is released at its superior and inferior margins (Bellucci scissors)
The anterior flap is released with a lacrimal mini-sickle knife
With adequate bone removal, both flaps will fall open and remain in position

Step 6 - Flap Trimming & Reinsertion

The nasal mucosal flap elevated earlier is now trimmed to accommodate the opened lacrimal sac
A square segment is removed from the anterior flap (using sharp pediatric Blakesley forceps) to match the size of the opened sac
A ball probe manipulates all flaps into their final position - mucosal flaps apposed to sac flaps

Step 7 - Lacrimal Intubation (Conditional)

Decision based on tightness of the common canaliculus during Bowman probe passage
If tightly gripped: O'Donoghue probes (silicone stents) are placed bicanalicularly
Tubes secured tension-free with GelFoam, a segment of silicone tubing, and two titanium Liga clips
Left in place 4-6 weeks minimum; up to 6-9 months for common canaliculus stenosis

Endonasal DCR - transillumination and flap creation

Panel A: Transillumination via light probe through the canaliculus. Panel B: Diagram showing light probe and keratome positions. Panel C: Nasal mucosal incision and lacrimal fossa exposure. Panel D: Lacrimal sac flap removal.

POST-OPERATIVE CARE


Nasal drops	Decongestant or saline irrigation to maintain patency
Topical antibiotics	Antibiotic-steroid eye drops for 2-4 weeks
Stent removal	At 4-6 weeks (or later if canaliculus involved)
Follow-up syringing	To confirm patency at stent removal
Avoid nose-blowing	For 2 weeks post-operatively

KEY COMPARISONS

Feature	External DCR	Endoscopic DCR
Scar	Yes (facial scar)	No external scar
Lacrimal pump	May be disrupted (MCT detachment)	Preserved
Success rate	~90-95%	~85-95% (comparable)
Revision cases	Possible	Preferred approach
Visualisation of sac	Excellent	Excellent with drills

COMMON COMPLICATIONS

Bleeding (angular vessel injury in external; ethmoid vessels in endoscopic)
Persistent epiphora (failed ostium - most common cause = inadequate bone removal or scar)
Canalicular injury
Stent-related "cheese-wiring" through puncta
Orbital fat prolapse (external approach)
Sac-skin fistula (if I&D performed for acute abscess rather than DCR)

Sources:

Cummings Otolaryngology Head and Neck Surgery, Chapter 49 (Endoscopic DCR)
Kanski's Clinical Ophthalmology: A Systematic Approach, 10th ed., pp. 125-126
Scott-Brown's Otorhinolaryngology Head & Neck Surgery, Vol. 2 (Paediatric DCR)

Convert it into poster form pls with all the steps properly explained

Reading File

Running Command

ls -la /tmp/workspace/ 2>/dev/null || echo "workspace empty or missing"

Running Command

mkdir -p /tmp/workspace/dcr-poster

Writing File

~/dcr-poster/create_poster.py

from pptx import Presentation
from pptx.util import Inches, Pt, Emu
from pptx.dml.color import RGBColor
from pptx.enum.text import PP_ALIGN
from pptx.util import Inches, Pt
import copy

# ── Colour palette ─────────────────────────────────────────────────────────────
NAVY       = RGBColor(0x0D, 0x2B, 0x55)   # header / title background
TEAL       = RGBColor(0x00, 0x7B, 0x8A)   # section banners
TEAL_LIGHT = RGBColor(0xE0, 0xF4, 0xF6)   # step-card background
GOLD       = RGBColor(0xF5, 0xA6, 0x23)   # step number circle
WHITE      = RGBColor(0xFF, 0xFF, 0xFF)
DARK_TEXT  = RGBColor(0x1A, 0x1A, 0x2E)
GREY_LINE  = RGBColor(0xCC, 0xCC, 0xCC)
RED        = RGBColor(0xC0, 0x39, 0x2B)
GREEN      = RGBColor(0x1A, 0x7A, 0x4A)
ORANGE     = RGBColor(0xE6, 0x74, 0x1B)

# ── Slide size: A0-ish portrait poster  (33.1" × 46.8") ──────────────────────
# Using 24" × 36" — common academic poster, fits well on screen
W_IN = 24
H_IN = 36
prs = Presentation()
prs.slide_width  = Inches(W_IN)
prs.slide_height = Inches(H_IN)

slide_layout = prs.slide_layouts[6]   # blank
slide = prs.slides.add_slide(slide_layout)

def add_rect(slide, left, top, width, height, fill_color=None, line_color=None, line_width=Pt(0)):
    shape = slide.shapes.add_shape(
        1,  # MSO_SHAPE_TYPE.RECTANGLE
        Inches(left), Inches(top), Inches(width), Inches(height)
    )
    fill = shape.fill
    if fill_color:
        fill.solid()
        fill.fore_color.rgb = fill_color
    else:
        fill.background()
    line = shape.line
    if line_color:
        line.color.rgb = line_color
        line.width = line_width
    else:
        line.fill.background()
    return shape

def add_text_box(slide, left, top, width, height, text, font_size=Pt(14),
                 bold=False, color=DARK_TEXT, align=PP_ALIGN.LEFT,
                 wrap=True, italic=False):
    txBox = slide.shapes.add_textbox(
        Inches(left), Inches(top), Inches(width), Inches(height)
    )
    tf = txBox.text_frame
    tf.word_wrap = wrap
    p = tf.paragraphs[0]
    p.alignment = align
    run = p.add_run()
    run.text = text
    run.font.size = font_size
    run.font.bold = bold
    run.font.color.rgb = color
    run.font.italic = italic
    return txBox

def add_text_box_multiline(slide, left, top, width, height, lines,
                            font_size=Pt(13), color=DARK_TEXT,
                            align=PP_ALIGN.LEFT, bold_first=False,
                            line_spacing=1.15):
    from pptx.util import Pt as pt_util
    from pptx.oxml.ns import qn
    from lxml import etree
    txBox = slide.shapes.add_textbox(
        Inches(left), Inches(top), Inches(width), Inches(height)
    )
    tf = txBox.text_frame
    tf.word_wrap = True
    for i, line in enumerate(lines):
        if i == 0:
            p = tf.paragraphs[0]
        else:
            p = tf.add_paragraph()
        p.alignment = align
        # line spacing
        from pptx.oxml.ns import qn
        pPr = p._p.get_or_add_pPr()
        lnSpc = etree.SubElement(pPr, qn('a:lnSpc'))
        spcPct = etree.SubElement(lnSpc, qn('a:spcPct'))
        spcPct.set('val', str(int(line_spacing * 100000)))

        run = p.add_run()
        run.text = line
        run.font.size = font_size
        run.font.color.rgb = color
        if bold_first and i == 0:
            run.font.bold = True
    return txBox

# ═══════════════════════════════════════════════════════════════════════════════
# 1. HEADER BANNER
# ═══════════════════════════════════════════════════════════════════════════════
add_rect(slide, 0, 0, W_IN, 2.8, fill_color=NAVY)

add_text_box(slide, 0.3, 0.18, W_IN - 0.6, 1.1,
             "DACRYOCYSTORHINOSTOMY (DCR)",
             font_size=Pt(54), bold=True, color=WHITE, align=PP_ALIGN.CENTER)

add_text_box(slide, 0.3, 1.22, W_IN - 0.6, 0.7,
             "Surgical Treatment of Dacryocystitis — Step-by-Step Guide",
             font_size=Pt(26), bold=False, color=RGBColor(0xAD, 0xD8, 0xE6),
             align=PP_ALIGN.CENTER)

add_text_box(slide, 0.3, 1.88, W_IN - 0.6, 0.55,
             "External DCR  |  Endoscopic (Endonasal) DCR  |  Post-op Care  |  Complications",
             font_size=Pt(18), bold=False, color=GOLD, align=PP_ALIGN.CENTER)

# ═══════════════════════════════════════════════════════════════════════════════
# 2. INDICATIONS BAND
# ═══════════════════════════════════════════════════════════════════════════════
add_rect(slide, 0, 2.85, W_IN, 0.55, fill_color=TEAL)
add_text_box(slide, 0.3, 2.88, W_IN - 0.6, 0.48,
             "INDICATIONS:   Chronic dacryocystitis (NLD obstruction)  •  Acute dacryocystitis (after infection control)  •  "
             "Mucocoele  •  Lacrimal sac fistula  •  Failed probing/syringing",
             font_size=Pt(17), bold=True, color=WHITE, align=PP_ALIGN.CENTER)

# ═══════════════════════════════════════════════════════════════════════════════
# HELPER: draw a numbered step card
# ═══════════════════════════════════════════════════════════════════════════════
def step_card(slide, col_x, row_y, w, h, step_num, title, bullets,
              num_color=GOLD, title_color=TEAL, card_color=TEAL_LIGHT):
    # card background
    shape = add_rect(slide, col_x, row_y, w, h,
                     fill_color=card_color,
                     line_color=TEAL, line_width=Pt(1.5))
    # round badge bg
    badge_size = 0.52
    badge = add_rect(slide, col_x + 0.12, row_y + 0.10,
                     badge_size, badge_size, fill_color=num_color)
    # step number
    add_text_box(slide, col_x + 0.12, row_y + 0.10,
                 badge_size, badge_size,
                 str(step_num), font_size=Pt(22), bold=True,
                 color=WHITE, align=PP_ALIGN.CENTER)
    # title
    add_text_box(slide, col_x + 0.72, row_y + 0.11,
                 w - 0.82, 0.52,
                 title, font_size=Pt(17), bold=True,
                 color=title_color, align=PP_ALIGN.LEFT)
    # bullets
    bullet_lines = ["• " + b for b in bullets]
    add_text_box_multiline(slide, col_x + 0.18, row_y + 0.68,
                            w - 0.30, h - 0.80,
                            bullet_lines,
                            font_size=Pt(13.5), color=DARK_TEXT,
                            line_spacing=1.18)

# ═══════════════════════════════════════════════════════════════════════════════
# 3. EXTERNAL DCR SECTION
# ═══════════════════════════════════════════════════════════════════════════════
add_rect(slide, 0, 3.48, W_IN, 0.52, fill_color=RED)
add_text_box(slide, 0.3, 3.50, W_IN - 0.6, 0.46,
             "PART 1 — EXTERNAL DCR (Classic Open Approach)",
             font_size=Pt(22), bold=True, color=WHITE, align=PP_ALIGN.CENTER)

# 3-column layout for external steps
COL_W = 7.6
COL_GAP = 0.3
COL1_X = 0.25
COL2_X = COL1_X + COL_W + COL_GAP
COL3_X = COL2_X + COL_W + COL_GAP
EXT_TOP = 4.08

external_steps = [
    ("Anaesthesia & Positioning",
     ["GA or LA with sedation",
      "Patient supine, head elevated ~20°",
      "Nasal packs with epinephrine pledgets",
      "Inject 1% lidocaine + 1:100,000 adrenaline at incision site",
      "Reduce cardiac output for haemostasis"]),
    ("Skin Incision",
     ["Curvilinear incision 10-12 mm medial to medial canthus",
      "Start just below the medial canthal tendon, extend ~12-15 mm inferiorly",
      "Lynch (curved) incision along side of nose",
      "Deepen through skin → subcutaneous tissue → orbicularis oculi"]),
    ("Exposure of Lacrimal Fossa",
     ["Identify and retract/ligate the angular vessels",
      "Identify medial canthal tendon — partially detach if needed",
      "Incise periosteum anterior to the anterior lacrimal crest",
      "Elevate periosteum with a periosteal elevator",
      "Expose the lacrimal fossa and lacrimal sac"]),
    ("Osteotomy — Bone Window",
     ["Perforate the thin lacrimal bone with bone punch or drill",
      "Enlarge with Hajek-Koeffler rongeur",
      "Window size: minimum 15 × 10 mm",
      "Extend from lacrimal crest anteriorly → ethmoid cells posteriorly",
      "Nasal mucosa now visible through bony window"]),
    ("Lacrimal Sac Cannulation",
     ["Dilate superior and inferior puncta with lacrimal dilator",
      "Pass Bowman probe (00) through inferior canaliculus",
      "Direct horizontally → then superiorly into the lacrimal sac",
      "Probe tents the sac wall to guide safe incision"]),
    ("Sac & Nasal Mucosal Flaps",
     ["Incise lacrimal sac with No. 11 or 15 blade (H-shaped/cruciate)",
      "Create anterior and posterior lacrimal sac flaps",
      "Make corresponding H-shaped incision in nasal mucosa",
      "Create and reflect anterior and posterior nasal mucosal flaps"]),
    ("Flap Anastomosis",
     ["Posterior flaps (sac + nasal mucosa) sutured first",
      "Use 5-0 Vicryl absorbable sutures",
      "Then approximate anterior flaps similarly",
      "Creates wide mucosal-lined anastomosis between sac and nasal cavity"]),
    ("Silicone Intubation (if needed)",
     ["Bicanalicular silicone stents (O'Donoghue tubes)",
      "Passed through both puncta → down through new ostium",
      "Retrieved from the nose and secured with clip or knot",
      "Leave 4-6 weeks (up to 6-9 months for canalicular stenosis)",
      "Indicated: tight common canaliculus, revision DCR, functional obstruction"]),
    ("Wound Closure",
     ["Close periosteum with absorbable suture",
      "Close skin in layers: interrupted or subcuticular sutures",
      "Use 6-0 nylon or Prolene",
      "Nasal pack placed for 24-48 hours post-op"]),
]

# Row heights for external steps — 3 cols × 3 rows = 9 steps
EXT_ROW_H = 2.10
for i, (title, bullets) in enumerate(external_steps):
    col = i % 3
    row = i // 3
    x = [COL1_X, COL2_X, COL3_X][col]
    y = EXT_TOP + row * (EXT_ROW_H + 0.18)
    step_card(slide, x, y, COL_W, EXT_ROW_H, i + 1, title, bullets,
              num_color=RED, title_color=RED)

# ═══════════════════════════════════════════════════════════════════════════════
# 4. ENDOSCOPIC DCR SECTION
# ═══════════════════════════════════════════════════════════════════════════════
ENDO_START_Y = EXT_TOP + 3 * (EXT_ROW_H + 0.18) + 0.05
add_rect(slide, 0, ENDO_START_Y, W_IN, 0.52, fill_color=TEAL)
add_text_box(slide, 0.3, ENDO_START_Y + 0.02, W_IN - 0.6, 0.46,
             "PART 2 — ENDOSCOPIC (ENDONASAL) DCR",
             font_size=Pt(22), bold=True, color=WHITE, align=PP_ALIGN.CENTER)

ENDO_TOP = ENDO_START_Y + 0.60

endo_steps = [
    ("OR Setup & Haemostasis",
     ["Head extended, side-to-side mobility, monitor opposite surgeon",
      "30° endoscope aimed superolaterally",
      "Head elevated 30°, reduce cardiac output",
      "Inject 1% lidocaine + 1:100,000 epinephrine lateral nasal wall",
      "Topical 1:1000 epinephrine neuropatties periodically",
      "High endoscopic septoplasty in ~50% of cases"]),
    ("Nasal Mucosal Flap Elevation",
     ["Posteriorly pedicled mucoperiosteal flap created",
      "No. 15 blade for incisions; sharp-suction Freer elevator for elevation",
      "Flap: superior margin 5 mm posterior to MT insertion, 10 mm above axilla",
      "Inferior limit 10 mm anterior to uncinate, at superior edge of IT",
      "Flap aggressively mobilised off axilla of middle turbinate",
      "Rolled back over middle turbinate for exposure"]),
    ("Bone Removal — Saucerization",
     ["Forward-biting rongeur (4-mm Hajek-Koeffler or Kerrison punch)",
      "Initial purchase by disarticulating lacrimal bone along maxillo-lacrimal suture",
      "Remove frontal process of maxilla covering anterior lacrimal sac",
      "Agger nasi usually opened during bone removal",
      "DCR drill bit used to 'saucerize' remaining bone",
      "End point: hemisphere of lacrimal sac sits 'proud' on saucerized bone",
      "Round knife flakes off lacrimal bone from posterior sac"]),
    ("Cannulation of Lacrimal System",
     ["Dilate both superior and inferior puncta",
      "Pass Bowman 00 probe through inferior canaliculus",
      "Direct horizontally + slightly posteriorly → then superiorly",
      "Probe tents medial sac wall confirming location against bony window",
      "Verify adequacy of bone removal via ball probe"]),
    ("Marsupialization of Lacrimal Sac",
     ["Spear knife opens sac vertically from top to bottom",
      "Ball probe checks bone removal adequacy through sac wall",
      "Bellucci scissors release posterior flap at superior and inferior margins",
      "Lacrimal mini-sickle knife releases the anterior flap",
      "With adequate saucerization: both flaps fall open and stay open"]),
    ("Flap Trimming & Reinsertion",
     ["Nasal mucosal flap trimmed to accommodate opened lacrimal sac",
      "Square segment removed from anterior flap (sharp Blakesley forceps)",
      "Segment size commensurate with the opened sac",
      "Ball probe used to manipulate all flaps into final position",
      "Mucosal flaps apposed to lacrimal sac flaps — no sutures usually needed"]),
    ("Lacrimal Intubation (Conditional)",
     ["Decision based on tightness of common canaliculus on probing",
      "Tight grip by common canaliculus → stents indicated",
      "O'Donoghue silicone probes passed bicanalicularly",
      "Tubes secured tension-free: GelFoam + silicone segment + 2 Liga clips",
      "Leave 4-6 weeks minimum; 6-9 months for common canaliculus stenosis",
      "Tension-free securing prevents cheese-wiring through puncta"]),
]

ENDO_ROW_H = 2.30
for i, (title, bullets) in enumerate(endo_steps):
    col = i % 3
    row = i // 3
    x = [COL1_X, COL2_X, COL3_X][col]
    y = ENDO_TOP + row * (ENDO_ROW_H + 0.18)
    step_card(slide, x, y, COL_W, ENDO_ROW_H, i + 1, title, bullets,
              num_color=TEAL, title_color=TEAL)

# ═══════════════════════════════════════════════════════════════════════════════
# 5. POST-OP & COMPLICATIONS SECTION (side by side)
# ═══════════════════════════════════════════════════════════════════════════════
POSTOP_Y = ENDO_TOP + 3 * (ENDO_ROW_H + 0.18) + 0.05

# Left: post-op
add_rect(slide, 0, POSTOP_Y, 11.8, 0.50, fill_color=GREEN)
add_text_box(slide, 0.3, POSTOP_Y + 0.03, 11.2, 0.44,
             "POST-OPERATIVE CARE",
             font_size=Pt(20), bold=True, color=WHITE, align=PP_ALIGN.CENTER)

postop_items = [
    ("Nasal irrigation", "Saline or decongestant drops to maintain patency"),
    ("Topical antibiotics", "Antibiotic-steroid eye drops for 2-4 weeks"),
    ("Stent removal", "At 4-6 weeks (or up to 9 months if canaliculus involved)"),
    ("Syringing", "Confirm patency at stent removal"),
    ("Nose-blowing", "Avoid for 2 weeks post-operatively"),
    ("Follow-up", "Review at 1 week, 4-6 weeks, 3 months"),
]
for i, (k, v) in enumerate(postop_items):
    row_y = POSTOP_Y + 0.58 + i * 0.48
    add_rect(slide, 0.25, row_y, 11.3, 0.42,
             fill_color=RGBColor(0xE8, 0xF8, 0xF0),
             line_color=GREEN, line_width=Pt(1.0))
    add_text_box(slide, 0.38, row_y + 0.04, 3.5, 0.36,
                 k, font_size=Pt(14), bold=True, color=GREEN)
    add_text_box(slide, 3.90, row_y + 0.04, 7.5, 0.36,
                 v, font_size=Pt(13.5), color=DARK_TEXT)

# Right: complications
add_rect(slide, 12.1, POSTOP_Y, 11.65, 0.50, fill_color=ORANGE)
add_text_box(slide, 12.2, POSTOP_Y + 0.03, 11.4, 0.44,
             "COMPLICATIONS",
             font_size=Pt(20), bold=True, color=WHITE, align=PP_ALIGN.CENTER)

complications = [
    ("Bleeding", "Angular vessel (external) / ethmoid vessels (endoscopic)"),
    ("Failed ostium", "Inadequate bone removal → scar / granulation tissue"),
    ("Persistent epiphora", "Most common cause of failure post-DCR"),
    ("Canalicular injury", "During probing or cannulation"),
    ("Cheese-wiring", "Stent under tension cutting through lacrimal puncta"),
    ("Orbital fat prolapse", "Periorbita breached — external approach"),
    ("Sac-skin fistula", "After I&D of acute abscess without definitive DCR"),
]
for i, (k, v) in enumerate(complications):
    row_y = POSTOP_Y + 0.58 + i * 0.48
    add_rect(slide, 12.2, row_y, 11.35, 0.42,
             fill_color=RGBColor(0xFD, 0xF2, 0xE8),
             line_color=ORANGE, line_width=Pt(1.0))
    add_text_box(slide, 12.32, row_y + 0.04, 3.5, 0.36,
                 k, font_size=Pt(14), bold=True, color=ORANGE)
    add_text_box(slide, 15.85, row_y + 0.04, 7.5, 0.36,
                 v, font_size=Pt(13.5), color=DARK_TEXT)

# ═══════════════════════════════════════════════════════════════════════════════
# 6. COMPARISON TABLE
# ═══════════════════════════════════════════════════════════════════════════════
CMP_Y = POSTOP_Y + 0.58 + 7 * 0.48 + 0.15
add_rect(slide, 0, CMP_Y, W_IN, 0.50, fill_color=NAVY)
add_text_box(slide, 0.3, CMP_Y + 0.03, W_IN - 0.6, 0.44,
             "EXTERNAL  vs  ENDOSCOPIC DCR — Comparison",
             font_size=Pt(20), bold=True, color=WHITE, align=PP_ALIGN.CENTER)

headers  = ["Feature", "External DCR", "Endoscopic DCR"]
col_data = [
    ("Facial Scar",             "Yes",            "No"),
    ("Lacrimal Pump",           "May be disrupted","Preserved"),
    ("Success Rate",            "~90-95%",         "~85-95%"),
    ("Revision Cases",          "Possible",        "Preferred"),
    ("Bone Visualisation",      "Direct",          "Endoscopic (drill)"),
    ("Stent Placement",         "Common",          "Selective"),
]
TABLE_TOP   = CMP_Y + 0.55
CELL_H      = 0.40
CELL_WIDTHS = [5.5, 9.25, 9.25]
TABLE_LEFT  = 0.0

# header row
hdr_colors = [NAVY, RED, TEAL]
for ci, (hdr, clr) in enumerate(zip(headers, hdr_colors)):
    x = TABLE_LEFT + sum(CELL_WIDTHS[:ci])
    add_rect(slide, x, TABLE_TOP, CELL_WIDTHS[ci], CELL_H + 0.05, fill_color=clr)
    add_text_box(slide, x + 0.15, TABLE_TOP + 0.06, CELL_WIDTHS[ci] - 0.2, CELL_H,
                 hdr, font_size=Pt(16), bold=True, color=WHITE, align=PP_ALIGN.CENTER)

for ri, row in enumerate(col_data):
    bg = RGBColor(0xF0, 0xF4, 0xFF) if ri % 2 == 0 else WHITE
    for ci, cell_text in enumerate(row):
        x = TABLE_LEFT + sum(CELL_WIDTHS[:ci])
        y = TABLE_TOP + CELL_H + 0.05 + ri * (CELL_H + 0.04)
        add_rect(slide, x, y, CELL_WIDTHS[ci], CELL_H,
                 fill_color=bg, line_color=GREY_LINE, line_width=Pt(0.75))
        align = PP_ALIGN.LEFT if ci == 0 else PP_ALIGN.CENTER
        bold = (ci == 0)
        add_text_box(slide, x + 0.18, y + 0.06, CELL_WIDTHS[ci] - 0.25, CELL_H,
                     cell_text, font_size=Pt(14), bold=bold,
                     color=DARK_TEXT, align=align)

# ═══════════════════════════════════════════════════════════════════════════════
# 7. FOOTER
# ═══════════════════════════════════════════════════════════════════════════════
FOOTER_Y = H_IN - 0.55
add_rect(slide, 0, FOOTER_Y, W_IN, 0.55, fill_color=NAVY)
add_text_box(slide, 0.3, FOOTER_Y + 0.08, W_IN - 0.6, 0.42,
             "Sources: Cummings Otolaryngology Head & Neck Surgery (Ch.49)  •  Kanski's Clinical Ophthalmology 10th Ed  •  Scott-Brown's Otorhinolaryngology HNS Vol 2",
             font_size=Pt(13), bold=False, color=RGBColor(0xAD, 0xD8, 0xE6),
             align=PP_ALIGN.CENTER)

# ═══════════════════════════════════════════════════════════════════════════════
# SAVE
# ═══════════════════════════════════════════════════════════════════════════════
out_path = "/tmp/workspace/dcr-poster/DCR_Surgery_Poster.pptx"
prs.save(out_path)
print(f"Saved: {out_path}")

Running Command

cd /tmp/workspace/dcr-poster && python create_poster.py 2>&1

Running Command

ls -lh /tmp/workspace/dcr-poster/

Your DCR Surgery Poster is ready! Here's the download link:

DCR Surgery Poster

Presentation · PPTX

What's inside the poster (24" × 36" academic poster format):

Section	Content
Header	Title, subtitle, section overview in navy/gold
Indications band	All indications for DCR in a teal banner
Part 1 - External DCR	9 colour-coded step cards (red theme) with numbered badges covering: anaesthesia, incision, fossa exposure, osteotomy, cannulation, flap creation, anastomosis, intubation, closure
Part 2 - Endoscopic DCR	7 colour-coded step cards (teal theme): OR setup, mucosal flap, saucerization, cannulation, marsupialization, flap trimming, intubation
Post-op Care	6 rows covering nasal drops, antibiotics, stent removal, syringing, precautions
Complications	7 rows covering bleeding, failed ostium, epiphora, canalicular injury, cheese-wiring, orbital fat prolapse, fistula
Comparison Table	External vs Endoscopic - scar, pump, success rate, revision suitability
Footer	Source citations

Open it in PowerPoint or Google Slides. You can print it directly at A0/A1 size or use it as a presentation slide.

What are the nutritional eye disorders

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Bitot spots xerophthalmia vitamin A deficiency eye

This composite figure illustrates the clinical and diagnostic progression of severe xerophthalmia and keratomalacia secondary to vitamin A deficiency in a 70-year-old male. Panels A, E, and G show clinical photographs highlighting characteristic Bitot's spots (foamy keratinized conjunctival plaques), corneal stromal infiltrates, and advanced keratomalacia with focal bulging (staphyloma formation). Panels B, D, F, H, and J utilize Anterior Segment Optical Coherence Tomography (AS-OCT) to quantify pathology, revealing conjunctival thickening (up to 737 μm), corneal stromal edema (1039 μm), and focal thinning (401 μm). Post-treatment panels (C, D, I, J) demonstrate clinical resolution after vitamin A supplementation and tectonic lamellar keratoplasty, with AS-OCT confirming successful graft adaptation. Histopathological sections (K, L) using HE and PAS stains contrast the diseased cornea against a normal control (M), showing massive epithelial hyperplasia (approximately 20 cell layers), focal keratinization, loss of Bowman's layer, and granular PAS-positive deposits, pathognomonic for squamous metaplasia in the setting of nutritional deficiency.

This composite image presents clinical photographs and Anterior Segment Optical Coherence Tomography (AS-OCT) findings in a case of severe keratomalacia associated with Vitamin A deficiency. Panels A-D focus on the right eye (OD). Panel A shows advanced corneal melting (keratomalacia) characterized by a bulging, whitish corneal surface completely overgrown by vascularized conjunctival tissue (conjunctivalization). Panel C highlights keratinization on the corneal surface, resembling Bitot's spots (arrow). Panels B and D provide AS-OCT cross-sections showing massive corneal thickening (940 μm), epithelial thickening (196 μm), and complete iris-to-cornea attachment (athalamia/anterior synechiae, arrow). Panels E and F focus on the left eye (OS). Panel E demonstrates bulbar conjunctival hyperemia and a hazy peripheral lesion at the 7-8 o'clock position (arrow). Panel F (AS-OCT) confirms slight peripheral corneal thinning to 556 μm in that same region (arrow). This series illustrates the range of ophthalmic manifestations of systemic malnutrition, from early peripheral thinning to end-stage keratectasia and corneal scarring.

This clinical photograph shows a close-up view of the left eye (LE) demonstrating severe keratomalacia, a condition characterized by corneal melting often secondary to severe vitamin A deficiency. The cornea is completely opaque with a dense, whitish, necrotic appearance (leukomalacia) that obscures any view of the underlying iris or pupil. A visible perforation is present, indicating a full-thickness defect in the corneal stroma. The surrounding bulbar and palpebral conjunctiva exhibit significant hyperemia (redness) and inflammation. The eyelids are being held open by surgical retractors to facilitate examination. This visual serves as a critical educational example of advanced xerophthalmia, emphasizing the end-stage ocular manifestations of nutritional deficiency and the potential for irreversible ocular surface destruction.

I now have comprehensive content from multiple authoritative textbooks. Here is the complete answer:

Nutritional Eye Disorders

Nutritional disorders affecting the eye result from deficiency (occasionally excess) of vitamins, minerals, and trace elements. They span a wide range - from the conjunctiva and cornea to the retina and optic nerve.

1. VITAMIN A DEFICIENCY - XEROPHTHALMIA

Vitamin A (retinol) is essential for maintenance of epithelial surfaces, immune function, and synthesis of rhodopsin (retinal photoreceptor protein). Deficiency produces the entire spectrum collectively called xerophthalmia.

Causes

Primary: Dietary deficiency, malnutrition (especially weaning age 1-3 years), chronic alcoholism, highly selective dieting
Secondary: Malabsorption states - cystic fibrosis, chronic pancreatitis, IBD, coeliac disease, post-gastrectomy, chronic liver disease, abetalipoproteinaemia (Bassen-Kornzweig syndrome)
Precipitating factors: coexisting diarrhoea, measles, protein-energy malnutrition (PEM)

WHO Classification (Grading)

Grade	Manifestation
XN	Night blindness (nyctalopia) - earliest sign
X1A	Conjunctival xerosis
X1B	Bitot spots
X2	Corneal xerosis
X3A	Corneal ulceration / keratomalacia < 1/3 cornea
X3B	Corneal ulceration / keratomalacia ≥ 1/3 cornea
XS	Corneal scar
XF	Xerophthalmic fundus

Clinical Features

Conjunctiva:

Xerosis - dryness with loss of goblet cells, squamous metaplasia, keratinization in the interpalpebral zone
Bitot spots - triangular patches of foamy keratinized epithelium in the interpalpebral zone (thought to involve Corynebacterium xerosis); pathognomonic sign

Cornea:

Lustreless, dull appearance (secondary xerosis)
Bilateral punctate corneal epithelial erosions in interpalpebral zone
Keratinization of corneal epithelium
Keratomalacia - liquefactive necrotic melting of the cornea; may perforate; medical emergency especially in infants

Retina:

Yellowish peripheral dots representing focal RPE defects in advanced cases
Decreased ERG amplitude

Systemic: Growth retardation, dry hyperkeratotic skin ("phrynoderma"), increased susceptibility to infections

Treatment

Keratomalacia = medical emergency (risk of death in infants)
Oral vitamin A (oil-based): 200,000 IU
IM vitamin A (aqueous): 100,000 IU
Multivitamin supplements and dietary sources
Local: intense lubrication, topical retinoic acid, management of perforation

Severe xerophthalmia and keratomalacia - Bitot's spots and corneal melting

Severe xerophthalmia showing Bitot's spots (foamy conjunctival plaques), corneal stromal infiltrates, and advanced keratomalacia. AS-OCT confirms corneal thinning. Bottom panels show resolution after vitamin A supplementation. (Kanski's Clinical Ophthalmology 10th Ed, Wills Eye Manual)

2. NUTRITIONAL OPTIC NEUROPATHY (Tobacco-Alcohol Amblyopia)

An uncommon but underdiagnosed acquired optic neuropathy due to B-complex vitamin deficiency, affecting the papillomacular bundle preferentially.

Pathophysiology

Deficient mitochondrial function (similar to hereditary optic neuropathies). The key deficiencies are:

Vitamin B12 (cyanocobalamin) - most important
Vitamin B1 (thiamine)
Vitamin B2 (riboflavin)
Vitamin B3 (niacin)
Vitamin B6 (pyridoxine)
Folic acid, copper, protein deficiency also contribute
Direct toxic effects of alcohol and tobacco may compound the deficiency

Causes

High alcohol and tobacco consumption with dietary neglect (Western countries)
Strict vegan diet
Pernicious anaemia (impaired B12 absorption)
Dietary deficiency in elderly patients
Epidemic nutritional optic neuropathy in food-insecure regions (e.g., Cuba 1991-93, Tanzania)

Clinical Features

Insidious onset, painless, bilateral central blurring of vision
Abnormal colour vision (red desaturation); colour loss disproportionate to acuity loss
Bilateral centrocaecal scotomas (better delineated with red target)
Optic discs: usually normal at presentation; may show subtle temporal pallor, splinter haemorrhages, or minimal oedema
Pupil reactions: often normal; may be weak in severe cases
Peripheral neurological symptoms if peripheral neuropathy coexists (Wernicke, Korsakoff, pernicious anaemia)
OCT: peripapillary RNFL thickening

Workup

Serum B12, folate, thiamine, copper
FBC, MCV (macrocytic anaemia in B12/folate deficiency)
Pernicious anaemia: anti-intrinsic factor antibodies

Prognosis & Treatment

Good prognosis if treated early; visual recovery can be slow
Colour perception returns more slowly than measurable acuity
B12 injections (hydroxocobalamin), oral B-complex vitamins
Smoking and alcohol cessation

3. VITAMIN B1 (THIAMINE) DEFICIENCY - BERIBERI / WERNICKE ENCEPHALOPATHY

Wernicke encephalopathy (due to thiamine deficiency) causes ophthalmoplegia (nystagmus, 6th nerve palsy, conjugate gaze palsy)
Nystagmus is the most common ocular feature
Associated with Korsakoff syndrome (confabulation + memory loss)
Occurs in alcoholism, prolonged parenteral nutrition without supplementation, hyperemesis gravidarum

4. VITAMIN B2 (RIBOFLAVIN) DEFICIENCY

Corneal vascularisation - superficial and deep corneal neovascularization
Photophobia, lacrimation, burning sensation
Blepharitis and angular stomatitis may accompany
Corneal changes may mimic interstitial keratitis

5. VITAMIN B3 (NIACIN/NICOTINIC ACID) DEFICIENCY - PELLAGRA

Pellagra (the "4 Ds" - Dermatitis, Diarrhoea, Dementia, Death)
Ocular: photophobia, corneal vascularisation, optic neuritis, conjunctivitis
Cystoid macular oedema has been linked to niacin supplementation (paradoxically, toxicity)

6. VITAMIN B12 (COBALAMIN) DEFICIENCY

Optic neuropathy with bilateral centrocaecal scotomas (part of nutritional optic neuropathy described above)
Sub-acute combined degeneration of the spinal cord may coexist
Pernicious anaemia: associated with conjunctival pallor (from anaemia)
Rarely: ophthalmoplegia

7. VITAMIN E DEFICIENCY

Vitamin E is a fat-soluble antioxidant. Deficiency occurs with fat malabsorption.

Pigmentary retinopathy - similar to retinitis pigmentosa in appearance
Ophthalmoplegia
Spinocerebellar ataxia with large-fibre sensory neuropathy, proprioceptive loss, areflexia
Found in: abetalipoproteinaemia (Bassen-Kornzweig syndrome - steatorrhoea + pigmentary retinopathy + acanthocytosis + ataxia), cystic fibrosis, cholestatic liver disease
Prolonged deficiency of years is needed before ocular signs appear

8. VITAMIN C (ASCORBIC ACID) DEFICIENCY - SCURVY

Subconjunctival haemorrhages - due to capillary fragility
Periorbital ecchymosis ("panda eyes")
Orbital bleeding in severe cases
Eyelid haemorrhages
Vitamin C is the highest concentration vitamin in aqueous humour; deficiency impairs collagen synthesis

9. VITAMIN D DEFICIENCY

Hypocalcaemia secondary to vitamin D deficiency can cause cataract (anterior and posterior subcapsular)
Band keratopathy (calcium deposition in cornea) can paradoxically occur with hypervitaminosis D (excess)

10. ZINC DEFICIENCY

Zinc is required for vitamin A metabolism (retinol-binding protein synthesis) and for retinal function
Abnormal dark adaptation (night blindness) - zinc deficiency impairs retinal function independently of vitamin A
May compound xerophthalmia when coexisting with vitamin A deficiency
Found in inflammatory bowel disease, alcoholic liver disease, parenteral nutrition without supplementation

SUMMARY TABLE

Nutrient	Deficiency	Key Ocular Feature
Vitamin A	Xerophthalmia	Night blindness → Bitot spots → Keratomalacia
Vitamin B1 (Thiamine)	Beriberi / Wernicke	Ophthalmoplegia, nystagmus
Vitamin B2 (Riboflavin)	Ariboflavinosis	Corneal vascularisation, photophobia
Vitamin B3 (Niacin)	Pellagra	Photophobia, corneal vascularisation, optic neuritis
Vitamin B12	Pernicious anaemia / dietary	Optic neuropathy, centrocaecal scotoma
Folate	Nutritional deficiency	Optic neuropathy (with B12)
Vitamin C	Scurvy	Subconjunctival/orbital haemorrhages
Vitamin D	Rickets / malabsorption	Hypocalcaemic cataract
Vitamin E	Fat malabsorption	Pigmentary retinopathy, ophthalmoplegia
Zinc	IBD, alcoholism	Abnormal dark adaptation

Sources:

Kanski's Clinical Ophthalmology: A Systematic Approach, 10th Ed. (Xerophthalmia, Nutritional Optic Neuropathy)
The Wills Eye Manual (Vitamin A Deficiency classification and management)
Park's Textbook of Preventive and Social Medicine (Xerophthalmia epidemiology, WHO grading)
Harrison's Principles of Internal Medicine, 22nd Ed. (Vitamin E, Vitamin A)
Adams & Victor's Principles of Neurology, 12th Ed. (Nutritional optic neuropathy)

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