skin ulcer AND surgery

general surgery ulcer definition classification causes standard surgical textbook

Choose the section to start with. I will cover it fully, then we can continue section by section.

chronic wounds AND assessment

chronic wound assessment ulcer examination clinical guideline edge floor base

chronic wounds AND management

chronic wound management venous arterial diabetic pressure ulcer guideline overview

~/

IWGDF 2023 diabetic foot ulcer guideline offloading infection peripheral artery disease pressure injury international guideline stages

chronic wounds AND ulcer

mkdir -p "/tmp/workspace/ulcer-lessons-pdf/src" "/tmp/workspace/ulcer-lessons-pdf/output" && printf 'directories created\n'

python - <<'PY' from reportlab.lib.pagesizes import A4 from reportlab.lib.styles import getSampleStyleSheet, ParagraphStyle from reportlab.lib.enums import TA_CENTER from reportlab.lib import colors from reportlab.lib.units import cm from reportlab.platypus import SimpleDocTemplate, Paragraph, Spacer, PageBreak, Table, TableStyle, KeepTogether from reportlab.pdfbase.ttfonts import TTFont from reportlab.pdfbase import pdfmetrics from reportlab.lib.colors import HexColor out='/tmp/workspace/ulcer-lessons-pdf/output/Complete_General_Surgery_Ulcer_Notes.pdf' styles=getSampleStyleSheet() styles.add(ParagraphStyle(name='TitleX', parent=styles['Title'], fontName='Helvetica-Bold', fontSize=24, leading=29, textColor=HexColor('#123047'), alignment=TA_CENTER, spaceAfter=13)) styles.add(ParagraphStyle(name='SubTitle', parent=styles['Normal'], fontName='Helvetica', fontSize=11, leading=15, alignment=TA_CENTER, textColor=HexColor('#39576b'), spaceAfter=14)) styles.add(ParagraphStyle(name='H1x', parent=styles['Heading1'], fontName='Helvetica-Bold', fontSize=18, leading=22, textColor=HexColor('#123047'), spaceBefore=10, spaceAfter=8)) styles.add(ParagraphStyle(name='H2x', parent=styles['Heading2'], fontName='Helvetica-Bold', fontSize=13, leading=16, textColor=HexColor('#1b5874'), spaceBefore=8, spaceAfter=5)) styles.add(ParagraphStyle(name='BodyX', parent=styles['BodyText'], fontName='Helvetica', fontSize=9.4, leading=13, spaceAfter=5)) styles.add(ParagraphStyle(name='SmallX', parent=styles['BodyText'], fontName='Helvetica', fontSize=8.2, leading=10.5, spaceAfter=3)) styles.add(ParagraphStyle(name='BoxX', parent=styles['BodyText'], fontName='Helvetica-Bold', fontSize=9.5, leading=13, textColor=HexColor('#10364d'), spaceAfter=3)) styles.add(ParagraphStyle(name='BulletX', parent=styles['BodyText'], fontName='Helvetica', fontSize=9.2, leading=12.5, leftIndent=14, firstLineIndent=-8, spaceAfter=3)) P=lambda s: Paragraph(s,styles['BodyX']) S=lambda s: Paragraph(s,styles['SmallX']) H1=lambda s: Paragraph(s,styles['H1x']) H2=lambda s: Paragraph(s,styles['H2x']) B=lambda s: Paragraph(s,styles['BulletX']) def bullet(s): return B('&bull; '+s) def callout(title,text): t=Table([[Paragraph('<b>'+title+'</b><br/>'+text,styles['BoxX'])]],colWidths=[17.2*cm]) t.setStyle(TableStyle([('BACKGROUND',(0,0),(-1,-1),HexColor('#e9f3f7')),('BOX',(0,0),(-1,-1),0.6,HexColor('#6ea0b6')),('LEFTPADDING',(0,0),(-1,-1),9),('RIGHTPADDING',(0,0),(-1,-1),9),('TOPPADDING',(0,0),(-1,-1),7),('BOTTOMPADDING',(0,0),(-1,-1),7)])) return t def table(headers, rows, widths): data=[[Paragraph('<b>'+x+'</b>',styles['SmallX']) for x in headers]]+[[Paragraph(x,styles['SmallX']) for x in r] for r in rows] t=Table(data,colWidths=widths,repeatRows=1,hAlign='LEFT') t.setStyle(TableStyle([('BACKGROUND',(0,0),(-1,0),HexColor('#1c5a76')),('TEXTCOLOR',(0,0),(-1,0),colors.white),('GRID',(0,0),(-1,-1),0.3,HexColor('#9bb5c1')),('VALIGN',(0,0),(-1,-1),'TOP'),('LEFTPADDING',(0,0),(-1,-1),5),('RIGHTPADDING',(0,0),(-1,-1),5),('TOPPADDING',(0,0),(-1,-1),4),('BOTTOMPADDING',(0,0),(-1,-1),4),('ROWBACKGROUNDS',(0,1),(-1,-1),[colors.white,HexColor('#f4f8fa')])])) return t def footer(canvas,doc): canvas.saveState(); canvas.setFont('Helvetica',8); canvas.setFillColor(HexColor('#456575')) canvas.drawString(1.55*cm,1.1*cm,'General Surgery Ulcer Notes | For study use: clinical decisions require supervision and local guidance') canvas.drawRightString(19.45*cm,1.1*cm,'Page %d'%doc.page); canvas.restoreState() story=[] story += [Spacer(1,2.0*cm),Paragraph('GENERAL SURGERY',styles['SubTitle']),Paragraph('Complete Ulcer Notes',styles['TitleX']),Paragraph('10 simple, exam-oriented lessons for clinical examination, short notes and viva revision',styles['SubTitle']),Spacer(1,0.5*cm),callout('How to use this booklet','Read Lessons 1-3 first. Then learn the four common chronic ulcer types in Lessons 4-7. Finish with special ulcers, malignancy, and the universal exam approach. “Ulcer” here means a skin/leg/foot wound topic in general surgery, not peptic ulcer disease.'),Spacer(1,0.7*cm),P('<b>Core rule:</b> An ulcer will not heal until its cause is found and corrected. Always ask: <i>Is there poor blood supply? venous disease? pressure? neuropathy? infection? diabetes? cancer?</i>'),Spacer(1,1.5*cm),P('Based principally on the chronic wound, venous leg ulcer and clinical examination framework in <i>Bailey & Love’s Short Practice of Surgery, 28th ed.</i> and <i>S. Das, A Manual on Clinical Surgery, 13th ed.</i>. Current diabetic-foot principles are aligned with IWGDF 2023 guidance.'),PageBreak()] story += [H1('Contents'),table(['Lesson','Topic'],[(str(i),t) for i,t in enumerate(['Ulcer basics and healing','Clinical examination and case presentation','Classification and differential diagnosis','Venous leg ulcer','Arterial/ischaemic ulcer','Diabetic and neuropathic foot ulcer','Pressure ulcer','Infective and specific ulcers','Malignant ulcer and Marjolin ulcer','Investigations, universal treatment and revision'],1)], [2*cm,15.2*cm]),Spacer(1,10),H2('Red flags: urgent senior or specialist assessment'),bullet('A cold, pale or blue foot; rest pain; rapidly increasing tissue loss; absent pulses; gangrene.'),bullet('Fever, spreading cellulitis, crepitus, sepsis, or a diabetic foot infection.'),bullet('A deep ulcer with exposed tendon, joint or bone, or suspected osteomyelitis.'),bullet('An ulcer that is atypical, enlarging, has a raised/everted edge, bleeds easily, or fails to heal: consider biopsy.'),bullet('Do <b>not</b> apply high compression until significant arterial disease has been excluded.'),PageBreak()] # 1 story += [H1('Lesson 1. Ulcer basics and healing'),H2('1. Definition'),P('An <b>ulcer</b> is a break in the skin or mucous membrane with loss of tissue. A simple wound usually follows normal repair and closes. A chronic ulcer is “stuck” and does not progress through normal healing in a timely way.'),H2('2. Acute versus chronic'),table(['Acute ulcer','Chronic ulcer'],[('Usually follows a recent injury or short illness and heals when the cause ends.','Persists because a factor continues to prevent repair: poor blood flow, venous hypertension, pressure, neuropathy, infection, diabetes, malignancy or poor nutrition.'),('Often has healthy red granulation tissue and a relatively clean base.','May have slough, necrosis, recurrent inflammation, infection, abnormal edges and surrounding skin changes.')],[8.6*cm,8.6*cm]),H2('3. Normal healing in simple words'),P('<b>Haemostasis:</b> bleeding stops. <b>Inflammation:</b> the body cleans the wound. <b>Proliferation:</b> granulation tissue fills the defect, new skin grows from the edge, and the wound contracts. <b>Remodelling:</b> scar becomes stronger over months. In chronic wounds, inflammation often persists and repair does not move forward.'),H2('4. Factors that delay healing'),bullet('<b>Local:</b> inadequate arterial supply, venous oedema, pressure, repeated trauma, foreign body, dead tissue, infection, haematoma, irradiated tissue and malignancy.'),bullet('<b>General:</b> diabetes, anaemia, malnutrition, dehydration, renal failure, jaundice, smoking, immunosuppression, severe illness and poor mobility.'),callout('Exam sentence','“A chronic ulcer is managed by treating the underlying aetiology, improving the wound bed and correcting patient factors that prevent healing.”'),H2('5. Words you must know'),table(['Term','Meaning'],[('Granulation tissue','New vascular repair tissue. Healthy tissue is red, moist and granular.'),('Slough','Soft yellow, cream or grey devitalised tissue.'),('Necrosis/eschar','Dead tissue. It may be black, brown or dry.'),('Epithelialisation','New skin advancing from the edge.'),('Maceration','White, soggy peri-wound skin due to excess moisture.'),('Callus','Thick hard keratin, common around neuropathic plantar ulcers.'),('Sinus','A narrow tract that opens on the skin surface.'),('Undermining','The wound extends beneath an apparently intact edge.')],[4.2*cm,13*cm]),PageBreak()] #2 story += [H1('Lesson 2. Clinical examination and case presentation'),H2('1. History'),bullet('Duration, first event, progression, recurrence, pain, discharge, bleeding, fever and treatment already received.'),bullet('Trauma, burns, footwear, pressure/immobility, travel, tuberculosis exposure, sexually transmitted infection risk, weight loss or cancer symptoms.'),bullet('Ask about claudication and rest pain for arterial disease; limb swelling, varicose veins, past DVT and previous ulcers for venous disease.'),bullet('Ask about diabetes, loss of feeling, renal disease, smoking, vascular disease, drugs such as steroids/immunosuppressants, and nutritional state.'),H2('2. General examination'),P('Look for fever, pallor, poor nutrition, oedema, dehydration, lymph nodes, diabetic complications and signs of systemic disease. Examine both legs and the other foot.'),H2('3. Local examination: describe in this order'),table(['Feature','What to record and why'],[('Site and number','Exact anatomical site; single or multiple. Site strongly suggests cause.'),('Size and depth','Measure length x width and depth after cleaning. Note cavities, sinus or undermining.'),('Shape','Round, oval, irregular, serpiginous, punched out or geographic.'),('Edge','Sloping, punched out, undermined, everted, rolled, callous or indistinct.'),('Floor','The visible exposed surface: healthy granulation, slough, necrosis, tendon or bone.'),('Base','The tissue on which the ulcer rests, felt by palpation. It may be soft, indurated, fixed or attached to deeper structures.'),('Discharge','Amount, colour, consistency, odour and whether it is purulent, serous or blood-stained.'),('Surrounding skin','Pigmentation, eczema, oedema, lipodermatosclerosis, callus, cellulitis, scars, warmth, maceration or loss of hair.'),('Pain and tenderness','Severe pain suggests ischaemia or acute infection; neuropathic ulcers may be painless.'),('Vascular/nerve exam','Temperature, capillary refill, pulses, ABI when appropriate; sensation with monofilament, vibration and reflexes.')],[3.3*cm,13.9*cm]),H2('4. Edge patterns: classic exam associations'),table(['Edge','Typical association'],[('Sloping','Healing ulcer, classically venous ulcer.'),('Punched out','Arterial/ischaemic or neuropathic ulcer.'),('Undermined','Classically tuberculous ulcer.'),('Everted/rolled','Suggests squamous cell carcinoma until proven otherwise.'),('Callous','Neuropathic/diabetic plantar ulcer.')],[4.7*cm,12.5*cm]),H2('5. A one-minute presentation'),P('“This is a single chronic ulcer over the medial gaiter area of the right leg, measuring __ cm by __ cm and __ cm deep. It has a __ edge, __ floor, __ base and __ discharge. The surrounding skin shows __. Pedal pulses are __ and sensation is __. My provisional diagnosis is __ ulcer, because __. I would assess arterial supply, infection and the underlying cause.”'),PageBreak()] #3 story += [H1('Lesson 3. Classification and differential diagnosis'),H2('A practical classification'),table(['Group','Examples / mechanism'],[('Traumatic','Mechanical injury, burns, repeated friction, chemical injury, foreign body.'),('Infective','Pyogenic infection, tuberculosis, syphilis, tropical infections and deep fungal disease.'),('Vascular','Venous hypertension, arterial insufficiency, vasculitis and mixed arterial-venous disease.'),('Neuropathic/metabolic','Diabetic neuropathy, leprosy, spinal disease. Pressure is not felt, so repetitive injury occurs.'),('Pressure-related','Sustained pressure and shear over bony prominences in immobility.'),('Malignant','Primary skin cancer or malignant transformation in a long-standing scar/ulcer.'),('Inflammatory/other','Pyoderma gangrenosum and other atypical causes.')],[4.4*cm,12.8*cm]),H2('How site points to cause'),bullet('<b>Medial gaiter region, near medial malleolus:</b> usually venous.'),bullet('<b>Toes, lateral foot, heel or pressure points with poor pulses:</b> arterial/ischaemic.'),bullet('<b>Plantar metatarsal heads:</b> neuropathic/diabetic.'),bullet('<b>Sacrum, heels, trochanters:</b> pressure injury.'),bullet('<b>Any persistent ulcer in scar, burn scar or sinus:</b> consider Marjolin ulcer.'),H2('Do not label every chronic ulcer “venous”'),P('Leg ulcers have multiple causes. Mixed arterial-venous disease is common enough that arterial assessment is essential before compression. If the site, appearance or course is unusual, reconsider the diagnosis and biopsy atypical non-healing lesions.'),callout('Fast memory aid: VAPN-M','<b>V</b>enous, <b>A</b>rterial, <b>P</b>ressure, <b>N</b>europathic/diabetic, <b>M</b>alignant. Then add trauma and infection.'),PageBreak()] #4 story += [H1('Lesson 4. Venous leg ulcer'),H2('Cause'),P('Venous valves fail or deep veins are obstructed, producing sustained venous hypertension. Fluid and inflammatory changes damage the skin and prevent healing. It may follow varicose veins, deep-vein thrombosis or chronic venous insufficiency.'),H2('Typical features'),table(['Feature','Venous ulcer'],[('Site','Gaiter area, especially just above the medial malleolus.'),('Pain','Aching or moderate pain, often better with elevation.'),('Appearance','Usually shallow, irregular, moist; edge often sloping.'),('Surrounding skin','Oedema, varicose veins, brown haemosiderin pigmentation, venous eczema, lipodermatosclerosis, atrophie blanche.'),('Pulses','Usually present unless mixed disease.'),('Temperature','Limb often warm.')],[4.7*cm,12.5*cm]),H2('Assessment'),bullet('Palpate pulses. Measure ABI or arrange vascular assessment before strong compression, especially if pulses are reduced, the patient has diabetes, or symptoms suggest arterial disease.'),bullet('Duplex venous ultrasound identifies reflux or obstruction when intervention is considered.'),H2('Treatment principles'),bullet('Clean the ulcer, remove devitalised tissue when appropriate, manage exudate and treat clinical infection. Do not prescribe antibiotics for colonisation alone.'),bullet('<b>Compression therapy</b> is the main treatment when adequate arterial supply is confirmed. Elevation, calf-muscle exercise and walking help reduce venous hypertension.'),bullet('Treat superficial venous reflux where indicated. Long-term compression and skin care reduce recurrence.'),callout('Exam warning','Compression can be harmful in significant arterial insufficiency. Check arterial status first.'),PageBreak()] #5 story += [H1('Lesson 5. Arterial/ischaemic ulcer'),H2('Cause'),P('Arterial ulcers result from inadequate tissue perfusion, usually peripheral arterial disease from atherosclerosis. Other causes include embolism, thromboangiitis obliterans, vasculitis and trauma.'),H2('Typical features'),table(['Feature','Arterial/ischaemic ulcer'],[('Site','Distal foot, toes, heel, lateral malleolus or areas exposed to pressure.'),('Pain','Often severe; worse at night or on elevation, sometimes relieved by dangling the leg.'),('Appearance','Small, deep, sharply demarcated “punched-out” ulcer; pale base, necrosis or dry gangrene may occur.'),('Surrounding skin','Cold, shiny, thin, hairless; may be pale, cyanosed or dependent-rubor.'),('Pulses','Reduced or absent.'),('Associated symptoms','Intermittent claudication, rest pain or prior vascular disease.')],[4.7*cm,12.5*cm]),H2('Assessment and management'),bullet('This requires urgent vascular assessment if there is rest pain, tissue loss, infection or gangrene. Document pulses and obtain ABI/toe pressures and arterial duplex as appropriate.'),bullet('Control pain, protect the wound, avoid trauma and optimise cardiovascular risk: smoking cessation, diabetes control, antiplatelet/statin therapy when clinically indicated.'),bullet('The definitive aim is <b>revascularisation</b> when feasible. Debridement is considered carefully: dry stable ischaemic eschar is not blindly removed before perfusion is addressed.'),callout('Viva point','A painful distal ulcer with absent pedal pulses is arterial until proved otherwise.'),PageBreak()] #6 story += [H1('Lesson 6. Diabetic and neuropathic foot ulcer'),H2('Why diabetic ulcers form'),P('Usually a combination of <b>neuropathy</b> (loss of protective pain sensation), <b>deformity and high plantar pressure</b>, <b>ischaemia</b> from peripheral arterial disease, and <b>infection</b>. The patient may not feel repeated trauma from footwear or walking.'),H2('Typical features'),bullet('Often at plantar metatarsal heads, hallux or other pressure points. It may be painless despite depth.'),bullet('Callus is common at the edge. The base may show slough, tendon or bone. Look for deformity, Charcot changes, fissures and interdigital infection.'),H2('Examination checklist'),bullet('Inspect both feet, footwear and socks. Assess pulses, capillary refill and skin temperature.'),bullet('Test sensation with a 10-g monofilament at standard sites and assess vibration perception where available.'),bullet('Assess infection: erythema, warmth, swelling, tenderness, purulence, malodour, lymphangitis, fever. Probe gently for depth and possible bone. Consider osteomyelitis in a deep/chronic ulcer.'),H2('Management'),bullet('<b>Off-load pressure:</b> this is central. A non-removable knee-high off-loading device is often preferred for an uncomplicated neuropathic plantar forefoot/midfoot ulcer when safe and tolerated. Choose removable devices or alternatives based on infection, ischaemia and the individual.'),bullet('Debride callus/devitalised tissue when perfusion is sufficient; use appropriate dressings; optimise glucose control and nutrition.'),bullet('Treat clinically infected ulcers with systemic antibiotics guided by severity and cultures when indicated. Severe infection, deep abscess, necrosis or systemic toxicity needs urgent surgical care.'),bullet('Assess and treat peripheral arterial disease. Revascularisation may be limb-saving.'),callout('Patient safety','A new diabetic foot ulcer, redness, swelling or discharge needs prompt professional assessment. Do not allow the patient to continue walking on a plantar ulcer without an off-loading plan.'),PageBreak()] #7 story += [H1('Lesson 7. Pressure ulcer / pressure injury'),H2('Cause'),P('Pressure injuries occur when prolonged pressure, often with shear and friction, compresses tissue between a bony prominence and a support surface. Poor perfusion causes ischaemic damage. Risk rises with immobility, incontinence, malnutrition, sensory loss and poor general condition.'),H2('Common sites'),P('Sacrum, heels, greater trochanters, ischial tuberosities, occiput, elbows and around medical devices or casts.'),H2('Stages: simplified'),table(['Stage','Description'],[('1','Intact skin with non-blanchable redness. In darker skin, look for colour change, warmth, firmness or pain.'),('2','Partial-thickness skin loss or blister. No exposed fat, muscle or bone.'),('3','Full-thickness skin loss; fat/granulation may be visible. Depth varies by site.'),('4','Full-thickness tissue loss with exposed or directly palpable fascia, muscle, tendon, cartilage or bone.'),('Unstageable','Depth cannot be seen because slough or eschar covers the base.'),('Deep tissue pressure injury','Persistent deep red, maroon or purple discoloration, possibly with blistering, suggesting deeper damage.')],[4.2*cm,13*cm]),H2('Prevention is the most effective treatment'),bullet('Risk assessment, regular skin inspection, frequent repositioning and avoiding sustained pressure.'),bullet('Use pressure-redistributing mattresses/cushions, heel protection, moisture/incontinence management, nutrition and hydration support, and staff/patient education.'),H2('Treatment'),bullet('Remove pressure immediately. Clean, manage moisture and exudate, debride devitalised tissue when suitable, and treat clinical infection. Consider surgical debridement or flap closure in selected deep wounds after optimisation.'),PageBreak()] #8 story += [H1('Lesson 8. Infective and specific ulcers'),H2('1. Pyogenic/infected ulcer'),P('An ordinary traumatic or vascular ulcer may become infected. Look for spreading erythema, warmth, increasing pain, purulent discharge, foul odour, fever or systemic illness. Obtain cultures only when infection is suspected and use antibiotics for clinical infection, not merely because a swab grows bacteria.'),H2('2. Tuberculous ulcer'),P('Classically has an <b>undermined edge</b>, thin bluish skin around it, pale granulation tissue, scanty serosanguineous discharge and associated regional lymph nodes or sinus. Confirm by tissue biopsy for histology and mycobacterial tests. Treat with standard anti-tuberculous therapy under appropriate care.'),H2('3. Syphilitic ulcer'),P('Primary syphilitic chancre is typically painless, clean, indurated and associated with non-tender regional lymph nodes. This is usually assessed in sexual-health services. Diagnosis uses appropriate serology and treatment follows local infectious-disease guidance.'),H2('4. Tropical ulcer'),P('A painful chronic lower-leg ulcer may occur in tropical settings after minor trauma and secondary infection. It often needs wound care, appropriate antimicrobials based on local protocols, nutrition, tetanus assessment and exclusion of vascular disease or malignancy.'),H2('5. Atypical ulcers'),P('Vasculitis, pyoderma gangrenosum, autoimmune disease, deep fungal infection and cancer can mimic ordinary ulcers. A very painful, rapidly enlarging, unusual or treatment-resistant ulcer warrants dermatology/surgical review and biopsy. Avoid aggressive debridement in suspected pyoderma gangrenosum until specialist assessment because pathergy can worsen it.'),PageBreak()] #9 story += [H1('Lesson 9. Malignant ulcer and Marjolin ulcer'),H2('When to suspect cancer'),bullet('Everted or rolled edge, hard/indurated base, easy bleeding, foul or blood-stained discharge, exuberant granulation tissue, progressive enlargement, unexplained pain, or failure to heal despite appropriate care.'),bullet('An ulcer arising in a long-standing burn scar, chronic osteomyelitis sinus, pressure sore or old scar is particularly concerning.'),H2('Marjolin ulcer'),P('Marjolin ulcer means malignant transformation, usually squamous cell carcinoma, in a chronic scar, sinus or non-healing wound. It may appear after many years. It is an important exam diagnosis because a chronic ulcer should never be accepted as benign without reconsideration when its behaviour changes.'),H2('Diagnosis'),P('Perform an adequate <b>biopsy</b> from the edge and base of the ulcer. A single superficial or non-representative biopsy can miss cancer, so repeat/deeper sampling may be needed if suspicion remains. Assess regional lymph nodes and stage the cancer with appropriate imaging.'),H2('Treatment principles'),P('Treatment depends on histology and stage. It usually involves wide local excision with adequate margins and reconstruction, with nodal assessment/management and oncology input when indicated. Amputation may be required for extensive limb disease where salvage is not possible.'),callout('Exam line','“Any chronic ulcer with an everted edge or hard base should be biopsied to exclude malignancy.”'),PageBreak()] #10 story += [H1('Lesson 10. Investigations, universal treatment and rapid revision'),H2('1. Choose investigations by suspected cause'),table(['Question','Useful tests'],[('Is blood supply adequate?','Pedal pulses, ABI, toe pressures when needed, arterial duplex; vascular imaging for revascularisation planning.'),('Is venous disease present?','Venous duplex ultrasound for reflux/obstruction.'),('Is there infection or bone involvement?','Blood tests in systemic illness; deep tissue sample if clinically infected; plain X-ray and MRI when osteomyelitis is suspected.'),('Could it be cancer or atypical disease?','Biopsy from edge and base, plus histology and targeted microbiology.'),('Are patient factors delaying healing?','Glucose/HbA1c, full blood count, renal function, nutritional assessment and medication review as clinically indicated.')],[5.2*cm,12*cm]),H2('2. Universal management: TIME + cause'),table(['Step','What it means'],[('T - Tissue','Remove devitalised tissue where appropriate and safe. Do not debride a critically ischaemic wound without vascular input.'),('I - Infection/inflammation','Detect clinical infection, drain abscesses, use antibiotics when indicated and control inflammatory cause.'),('M - Moisture balance','Select dressings that handle exudate without drying or macerating the wound.'),('E - Edge','Encourage epithelial advance by correcting cause, off-loading/compression when indicated and treating undermining/callus.'),('Cause','Venous: compression. Arterial: revascularise. Diabetic: off-load, control infection/ischaemia. Pressure: relieve pressure. Malignant: biopsy and excise.')],[3.3*cm,13.9*cm]),H2('3. Comparison table'),table(['Feature','Venous','Arterial','Neuropathic/diabetic','Pressure'],[('Main site','Medial gaiter','Toes/distal foot/heel','Plantar pressure points','Bony prominences'),('Pain','Aching, eased by elevation','Severe, worse elevated','Often little pain','Variable'),('Pulses','Usually present','Reduced/absent','May be reduced or normal','Usually present unless mixed disease'),('Skin around','Oedema, eczema, pigmentation','Cold, shiny, hairless','Callus, sensory loss','Non-blanchable erythema/skin loss'),('Key treatment','Compression if safe','Vascular intervention','Off-loading + infection/PAD care','Pressure relief/repositioning')],[2.6*cm,3.65*cm,3.65*cm,3.65*cm,3.65*cm]),H2('4. 10 viva questions'),bullet('Define an ulcer. What makes an ulcer chronic?'),bullet('How do you differentiate the floor from the base?'),bullet('Describe the edge types and their associations.'),bullet('What features suggest venous disease?'),bullet('Why must ABI/arterial status be assessed before compression?'),bullet('What are the major causes of diabetic foot ulcer?'),bullet('What is off-loading and why is it important?'),bullet('Name the stages of a pressure injury.'),bullet('When will you biopsy an ulcer?'),bullet('State the TIME principle and the cause-specific treatment of each common ulcer type.'),Spacer(1,8),callout('Final 20-second answer','“An ulcer is tissue loss on a surface. I assess its cause, duration, site, edge, floor, base, discharge, surrounding skin, arterial supply, sensation and nodes. Treatment is cause-specific, with wound-bed preparation, infection control, pressure relief or compression/off-loading as appropriate, vascular reconstruction where necessary, and biopsy of atypical or non-healing ulcers.”'),H2('Sources for study'),S('<i>Bailey & Love’s Short Practice of Surgery, 28th ed.</i>, Chronic Wounds and Venous Leg Ulcer sections. <i>S. Das, A Manual on Clinical Surgery, 13th ed.</i>, Local Examination, Classification of Ulcers and Ulcers of the Leg sections. IWGDF 2023 Practical and Offloading Guidelines for diabetes-related foot disease. This booklet is educational and does not replace local clinical protocols or specialist assessment.')] doc=SimpleDocTemplate(out,pagesize=A4,rightMargin=1.65*cm,leftMargin=1.65*cm,topMargin=1.35*cm,bottomMargin=1.65*cm,title='Complete General Surgery Ulcer Notes',author='Orris') doc.build(story,onFirstPage=footer,onLaterPages=footer) print(out) PY

python - <<'PY' from pypdf import PdfReader p='/tmp/workspace/ulcer-lessons-pdf/output/Complete_General_Surgery_Ulcer_Notes.pdf' r=PdfReader(p) print('exists',len(r.pages),'pages') for i in [0,1,len(r.pages)-1]: t=r.pages[i].extract_text() or '' print(i+1, len(t), t[:160].replace('\n',' | ')) PY ls -lh "/tmp/workspace/ulcer-lessons-pdf/output/Complete_General_Surgery_Ulcer_Notes.pdf"