cd "/home/daytona/workspace/attachments/1e81fce4-5437-43da-9562-d0eb215feab1/" && python3 -c " import pdfplumber with pdfplumber.open('Lecture 12-13.pdf') as pdf: print(f'Total pages: {len(pdf.pages)}') for i, page in enumerate(pdf.pages): print(f'\n===== PAGE {i+1} =====') text = page.extract_text() if text: print(text) else: print('[No text extracted]') "

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mkdir -p /home/daytona/workspace/respiratory-notes && cat > /home/daytona/workspace/respiratory-notes/generate_notes.py << 'PYEOF' from reportlab.lib.pagesizes import A4 from reportlab.lib.styles import getSampleStyleSheet, ParagraphStyle from reportlab.lib.units import cm from reportlab.lib import colors from reportlab.platypus import ( SimpleDocTemplate, Paragraph, Spacer, HRFlowable, Table, TableStyle, ListFlowable, ListItem, KeepTogether ) from reportlab.lib.enums import TA_LEFT, TA_CENTER, TA_JUSTIFY doc = SimpleDocTemplate( "/home/daytona/workspace/respiratory-notes/Respiratory_Physiology_Study_Notes.pdf", pagesize=A4, rightMargin=2*cm, leftMargin=2*cm, topMargin=2*cm, bottomMargin=2*cm ) styles = getSampleStyleSheet() # Custom styles title_style = ParagraphStyle("Title", parent=styles["Title"], fontSize=20, textColor=colors.HexColor("#1a3a5c"), spaceAfter=6, alignment=TA_CENTER) subtitle_style = ParagraphStyle("Subtitle", parent=styles["Normal"], fontSize=11, textColor=colors.HexColor("#4a4a4a"), spaceAfter=12, alignment=TA_CENTER) h1_style = ParagraphStyle("H1", parent=styles["Heading1"], fontSize=14, textColor=colors.white, backColor=colors.HexColor("#1a3a5c"), spaceAfter=6, spaceBefore=14, leftIndent=-10, rightIndent=-10, borderPad=6) h2_style = ParagraphStyle("H2", parent=styles["Heading2"], fontSize=12, textColor=colors.HexColor("#1a3a5c"), spaceAfter=4, spaceBefore=10, borderPad=3, borderColor=colors.HexColor("#1a3a5c"), borderWidth=0) h3_style = ParagraphStyle("H3", parent=styles["Heading3"], fontSize=11, textColor=colors.HexColor("#2e6da4"), spaceAfter=3, spaceBefore=7) body_style = ParagraphStyle("Body", parent=styles["Normal"], fontSize=10, leading=14, spaceAfter=4, alignment=TA_JUSTIFY) bullet_style = ParagraphStyle("Bullet", parent=styles["Normal"], fontSize=10, leading=14, leftIndent=14, bulletIndent=4, spaceAfter=3) box_style = ParagraphStyle("Box", parent=styles["Normal"], fontSize=10, leading=14, backColor=colors.HexColor("#eef4fb"), borderColor=colors.HexColor("#2e6da4"), borderWidth=1, borderPad=8, spaceAfter=8) warn_style = ParagraphStyle("Warn", parent=styles["Normal"], fontSize=10, leading=14, backColor=colors.HexColor("#fff8e1"), borderColor=colors.HexColor("#f9a825"), borderWidth=1, borderPad=8, spaceAfter=8) def H1(text): return Paragraph(f"&nbsp;&nbsp;{text}", h1_style) def H2(text): return Paragraph(text, h2_style) def H3(text): return Paragraph(text, h3_style) def B(text): return Paragraph(text, body_style) def BL(text): return Paragraph(f"• {text}", bullet_style) def SP(n=6): return Spacer(1, n) def HR(): return HRFlowable(width="100%", thickness=0.5, color=colors.HexColor("#cccccc"), spaceAfter=4) def BOX(text): return Paragraph(text, box_style) def WARN(text): return Paragraph(text, warn_style) story = [] # ── TITLE PAGE ────────────────────────────────────────────────────────────── story += [ SP(30), Paragraph("Respiratory Physiology", title_style), Paragraph("Lectures 12–13 | Condensed Study Notes", subtitle_style), HR(), SP(8), B("Topics covered: Cellular & External Respiration · Lung Volumes · Alveolar Structure · " "Respiratory Mechanics · Pulmonary Surfactant · COPD · Reflexes · Vocalization"), SP(40), ] # ── SECTION 1: CELLULAR RESPIRATION ───────────────────────────────────────── story += [ H1("1. Cellular & External Respiration"), SP(4), H2("1.1 Cellular Respiration"), BL("Occurs in the mitochondria; uses O₂, produces CO₂, extracts energy from nutrients."), BL("<b>Respiratory Quotient (RQ)</b> = CO₂ produced ÷ O₂ consumed."), SP(4), ] # RQ table rq_data = [ ["Fuel", "RQ"], ["Carbohydrate", "1.0"], ["Fat", "0.7"], ["Protein", "0.8"], ["Mixed (typical American diet)", "~0.8"], ] rq_table = Table(rq_data, colWidths=[9*cm, 4*cm]) rq_table.setStyle(TableStyle([ ("BACKGROUND", (0,0), (-1,0), colors.HexColor("#1a3a5c")), ("TEXTCOLOR", (0,0), (-1,0), colors.white), ("FONTNAME", (0,0), (-1,0), "Helvetica-Bold"), ("FONTSIZE", (0,0), (-1,-1), 10), ("ROWBACKGROUNDS", (0,1), (-1,-1), [colors.HexColor("#f0f4f8"), colors.white]), ("GRID", (0,0), (-1,-1), 0.5, colors.grey), ("ALIGN", (1,0), (1,-1), "CENTER"), ("VALIGN", (0,0), (-1,-1), "MIDDLE"), ("TOPPADDING", (0,0), (-1,-1), 5), ("BOTTOMPADDING", (0,0), (-1,-1), 5), ])) story += [rq_table, SP(6)] story += [ BOX("<b>Resting values (mixed diet):</b> O₂ consumption ≈ 250 mL/min | CO₂ production ≈ 200 mL/min"), SP(4), H2("1.2 External Respiration — 4 Steps"), BL("<b>Step 1 – Ventilation:</b> Air moves into/out of lungs (atmosphere ↔ alveoli)."), BL("<b>Step 2 – Pulmonary diffusion:</b> O₂/CO₂ exchange between alveoli and pulmonary capillary blood."), BL("<b>Step 3 – Transport:</b> Blood carries gases between lungs and tissues."), BL("<b>Step 4 – Tissue diffusion:</b> O₂/CO₂ exchange between blood and tissue cells."), SP(4), H2("1.3 Non-Respiratory Functions of the Respiratory System"), BL("Water & heat loss during humidification of inspired air."), BL("Enhances venous return via the <b>respiratory pump</b>."), BL("Acid-base balance — regulates CO₂ exhalation → controls pH."), BL("Speech, singing, vocalisation."), BL("Defence against inhaled particles (coughing, sneezing, mucus)."), BL("Metabolic filter: inactivates prostaglandins; activates angiotensin II."), BL("Olfaction (nose = organ of smell)."), SP(6), ] # ── SECTION 2: LUNG VOLUMES ────────────────────────────────────────────────── story += [ H1("2. Lung Volumes & Capacities"), SP(4), ] lv_data = [ ["Volume / Capacity", "Definition", "Male", "Female"], ["Tidal Volume (TV)", "Volume per normal breath", "500 mL", "500 mL"], ["IRV", "Max extra volume inspired above TV", "3100 mL", "1900 mL"], ["ERV", "Max extra volume expired below TV", "1200 mL", "700 mL"], ["RV", "Volume remaining after max expiration", "1200 mL", "1100 mL"], ["Inspiratory Capacity (IC)", "TV + IRV", "3600 mL", "2400 mL"], ["FRC", "ERV + RV", "2400 mL", "1800 mL"], ["Vital Capacity (VC)", "IRV + TV + ERV", "4800 mL", "3100 mL"], ["Total Lung Capacity (TLC)", "VC + RV", "6000 mL", "4200 mL"], ] lv_table = Table(lv_data, colWidths=[5.5*cm, 6*cm, 2*cm, 2*cm]) lv_table.setStyle(TableStyle([ ("BACKGROUND", (0,0), (-1,0), colors.HexColor("#2e6da4")), ("TEXTCOLOR", (0,0), (-1,0), colors.white), ("FONTNAME", (0,0), (-1,0), "Helvetica-Bold"), ("FONTSIZE", (0,0), (-1,-1), 9), ("ROWBACKGROUNDS", (0,1), (-1,-1), [colors.HexColor("#f0f4f8"), colors.white]), ("GRID", (0,0), (-1,-1), 0.5, colors.grey), ("ALIGN", (2,0), (-1,-1), "CENTER"), ("VALIGN", (0,0), (-1,-1), "MIDDLE"), ("TOPPADDING", (0,0), (-1,-1), 5), ("BOTTOMPADDING", (0,0), (-1,-1), 5), ])) story += [lv_table, SP(6), BOX("<b>Minute Ventilation (MV):</b> 12 breaths/min × 500 mL = <b>6 L/min</b>"), SP(6), ] # ── SECTION 3: ALVEOLAR STRUCTURE ──────────────────────────────────────────── story += [ H1("3. Alveolar Structure & the Gas-Exchange Barrier"), SP(4), BL("Alveoli are thin-walled air sacs at terminal airway branches."), BL("Wall = single layer of <b>Type I alveolar cells</b> (flattened)."), BL("Surrounded by a single-cell-thick capillary network."), BL("<b>Alveolar-capillary membrane</b> thickness: <b>0.5 mm</b> → rapid diffusion."), BL("~500 million alveoli; total gas-exchange surface area ≈ <b>75 m²</b>."), BL("<b>Type II alveolar cells</b> (5% of surface): secrete pulmonary surfactant."), BL("<b>Alveolar macrophages</b>: phagocytic defence against foreign particles."), BL("<b>Pores of Kohn</b>: inter-alveolar pores allowing collateral ventilation."), SP(4), BOX("<b>Fick's Law:</b> Diffusion rate ↑ when distance ↓ and surface area ↑."), SP(6), ] # ── SECTION 4: PLEURA & THORAX ─────────────────────────────────────────────── story += [ H1("4. Thoracic Cavity & Pleura"), SP(4), H2("4.1 Thoracic Structures"), BL("Chest wall: 12 pairs of ribs → sternum (anterior), thoracic vertebrae (posterior)."), BL("Floor: diaphragm (dome-shaped skeletal muscle); separates thorax from abdomen."), BL("Lungs fill most thoracic cavity; expand/deflate via thoracic wall movement, not intrinsic muscle."), SP(4), H2("4.2 Pleural Sac"), BL("<b>Visceral pleura</b> (inner) wraps the lung; <b>Parietal pleura</b> (outer) lines thoracic wall."), BL("Pleural cavity contains thin <b>intrapleural fluid</b> → lubricates surfaces."), BL("<b>Pleurisy</b>: inflammation of pleura → painful friction rub during breathing."), SP(6), ] # ── SECTION 5: RESPIRATORY MECHANICS ───────────────────────────────────────── story += [ H1("5. Respiratory Mechanics"), SP(4), H2("5.1 Key Pressures"), ] pres_data = [ ["Pressure", "Normal Value", "Notes"], ["Atmospheric (Patm)", "760 mmHg", "Sea level; reference baseline"], ["Intra-alveolar (Palv)", "760 mmHg at rest", "Equilibrates with Patm between breaths"], ["Intrapleural (Pip)", "756 mmHg at rest", "Sub-atmospheric; creates transmural gradient"], ] pres_table = Table(pres_data, colWidths=[5.5*cm, 4*cm, 6*cm]) pres_table.setStyle(TableStyle([ ("BACKGROUND", (0,0), (-1,0), colors.HexColor("#1a3a5c")), ("TEXTCOLOR", (0,0), (-1,0), colors.white), ("FONTNAME", (0,0), (-1,0), "Helvetica-Bold"), ("FONTSIZE", (0,0), (-1,-1), 9), ("ROWBACKGROUNDS", (0,1), (-1,-1), [colors.HexColor("#f0f4f8"), colors.white]), ("GRID", (0,0), (-1,-1), 0.5, colors.grey), ("VALIGN", (0,0), (-1,-1), "MIDDLE"), ("TOPPADDING", (0,0), (-1,-1), 5), ("BOTTOMPADDING", (0,0), (-1,-1), 5), ])) story += [pres_table, SP(6), H2("5.2 Transmural Pressure Gradient"), BL("Thorax grows faster than lungs during development → lungs are permanently stretched."), BL("Palv (760) > Pip (756) → net outward force keeps lungs stretched to fill thorax."), BL("Lungs' elastic recoil tries to pull inward but is counteracted by the gradient."), SP(4), H2("5.3 Pneumothorax"), WARN("<b>Pneumothorax:</b> Air enters pleural cavity (e.g., stab wound, rib fracture, lung perforation). " "Pip equilibrates with Patm → transmural gradient is lost → lung collapses to unstretched size. " "Requires prompt medical intervention."), SP(4), H2("5.4 Respiratory Cycle (Boyle's Law)"), H3("Inspiration (Active)"), BL("Diaphragm contracts (descends/flattens) → contributes ~75% of thoracic expansion."), BL("External intercostals contract → elevate ribs → expand thorax laterally & antero-posteriorly."), BL("Pip falls to ~754 mmHg; Palv drops below 760 mmHg → air flows in down pressure gradient."), BL("<b>Accessory muscles</b> (sternocleidomastoid, scalene) recruited during deep breaths."), SP(4), H3("Expiration (Passive at rest)"), BL("Inspiratory muscles relax → elastic recoil shrinks lungs → Palv rises to ~761 mmHg."), BL("Air flows out down pressure gradient until Palv = Patm."), SP(4), H3("Forced Expiration (Active)"), BL("Abdominal muscles contract → push diaphragm up → reduce vertical thoracic dimension."), BL("Internal intercostals contract → pull ribs down/inward → reduce thoracic size."), BL("Pip can exceed Patm during forced expiration; lungs stay open due to transmural gradient."), SP(6), ] # ── SECTION 6: AIRWAY RESISTANCE ───────────────────────────────────────────── story += [ H1("6. Airway Resistance"), SP(4), BL("Airflow rate depends on <b>pressure gradient</b> and <b>airway resistance</b>."), BL("Primary determinant of resistance: <b>radius of conducting airways</b>."), BL("Healthy airways: large radius → low resistance → only 1–2 mmHg gradient needed."), SP(4), H2("6.1 Autonomic Regulation"), BL("<b>Parasympathetic</b>: bronchoconstriction → ↑ resistance (quiet/rest states)."), BL("<b>Sympathetic / epinephrine</b>: bronchodilation → ↓ resistance (exercise/stress)."), BL("Bronchodilators (e.g., albuterol, β₂-agonists): therapeutic tools for bronchoconstriction."), SP(4), H2("6.2 COPD"), B("COPD = group of diseases with increased airway resistance due to lower-airway narrowing. " "Fourth leading cause of death worldwide. Includes:"), SP(4), ] copd_data = [ ["Disease", "Mechanism", "Key Features"], ["Chronic\nBronchitis", "Chronic airway inflammation from cigarette smoke / pollutants", "Airway wall thickening (oedema), excess thick mucus, impaired ciliary escalator, bacterial infections"], ["Asthma", "Airway hyperresponsiveness to triggers", "Airway wall thickening, mucus plugging, bronchospasm; triggers: allergens, irritants, infection, exercise"], ["Emphysema", "Excess trypsin / protease from macrophages destroys alveolar walls", "Alveolar wall breakdown, small airway collapse; α₁-antitrypsin deficiency is genetic cause"], ] copd_table = Table(copd_data, colWidths=[3*cm, 5.5*cm, 7*cm]) copd_table.setStyle(TableStyle([ ("BACKGROUND", (0,0), (-1,0), colors.HexColor("#c0392b")), ("TEXTCOLOR", (0,0), (-1,0), colors.white), ("FONTNAME", (0,0), (-1,0), "Helvetica-Bold"), ("FONTSIZE", (0,0), (-1,-1), 9), ("ROWBACKGROUNDS", (0,1), (-1,-1), [colors.HexColor("#fdf2f2"), colors.white]), ("GRID", (0,0), (-1,-1), 0.5, colors.grey), ("VALIGN", (0,0), (-1,-1), "TOP"), ("TOPPADDING", (0,0), (-1,-1), 5), ("BOTTOMPADDING", (0,0), (-1,-1), 5), ])) story += [copd_table, SP(6)] # ── SECTION 7: PULMONARY SURFACTANT ────────────────────────────────────────── story += [ H1("7. Pulmonary Surfactant"), SP(4), BL("Secreted by <b>Type II alveolar cells</b>; mixture of lipids and proteins (mainly DPPC)."), BL("Reduces surface tension at the alveolar air-water interface by interspersing between water molecules."), BL("↑ Pulmonary compliance → less effort to inflate lungs."), BL("↓ Tendency of alveoli to collapse (prevents atelectasis)."), SP(4), H2("7.1 Law of LaPlace"), BOX("<b>P (collapsing pressure) = 2T / r</b><br/>" "P = collapsing pressure | T = surface tension | r = alveolar radius<br/>" "→ Smaller alveoli have higher collapsing pressure at the same surface tension."), BL("Surfactant is MORE concentrated (closer-packed) in smaller alveoli → greater tension reduction."), BL("This compensates for smaller radius → prevents small alveoli from emptying into larger ones."), SP(4), H2("7.2 L:S Ratio (Fetal Lung Maturity)"), ] ls_data = [ ["L:S Ratio", "Lung Maturity", "Clinical Significance"], ["< 1.5", "Immature", "High risk of neonatal RDS"], ["≥ 2.0", "Mature", "Sufficient surfactant; low RDS risk"], ] ls_table = Table(ls_data, colWidths=[3.5*cm, 4.5*cm, 7.5*cm]) ls_table.setStyle(TableStyle([ ("BACKGROUND", (0,0), (-1,0), colors.HexColor("#2e6da4")), ("TEXTCOLOR", (0,0), (-1,0), colors.white), ("FONTNAME", (0,0), (-1,0), "Helvetica-Bold"), ("FONTSIZE", (0,0), (-1,-1), 10), ("ROWBACKGROUNDS", (0,1), (-1,-1), [colors.HexColor("#f0f4f8"), colors.white]), ("GRID", (0,0), (-1,-1), 0.5, colors.grey), ("VALIGN", (0,0), (-1,-1), "MIDDLE"), ("TOPPADDING", (0,0), (-1,-1), 5), ("BOTTOMPADDING", (0,0), (-1,-1), 5), ])) story += [ls_table, SP(4), BL("Lecithin rises sharply at ~32–33 weeks; L:S > 2 by ~35 weeks gestation."), BL("Sphingomyelin level stays constant; lecithin rises → ratio increases."), SP(4), H2("7.3 Newborn Respiratory Distress Syndrome (RDS)"), WARN("<b>Neonatal RDS:</b> Premature infants lack surfactant → alveoli collapse during expiration → " "require 20–30 mmHg transmural gradient (vs. normal 4–6 mmHg) to re-expand. " "Affects 30,000–50,000 infants/year (USA). <b>Treatment:</b> surfactant replacement therapy; " "drugs to accelerate surfactant-secreting cell maturation."), SP(4), H2("7.4 Compliance"), BL("<b>Compliance</b> = change in volume / change in pressure (slope of pressure-volume curve)."), BL("Compliance is <b>inversely related</b> to elastance (elastic recoil) and stiffness."), BL("Pressure reference: alveolar pressure OR transpulmonary pressure (Palv − Pip)."), SP(6), ] # ── SECTION 8: PROTECTIVE REFLEXES ─────────────────────────────────────────── story += [ H1("8. Protective Airway Reflexes"), SP(4), H2("8.1 Cough Reflex"), BL("Most sensitive areas: <b>larynx</b> and <b>carina</b>."), BL("Terminal bronchioles/alveoli respond to chemical irritants (SO₂, Cl₂)."), BL("<b>Afferent pathway:</b> Vagus nerve → medulla."), BL("Sequence: rapid 2.5 L inspiration → epiglottis + vocal cords close → " "abdominal muscles + internal intercostals contract → lung pressure ≥ 100 mmHg → " "sudden opening → explosive air release at <b>75–100 mph</b>."), BL("High-velocity air clears foreign material from bronchi and trachea."), SP(4), H2("8.2 Sneeze Reflex"), BL("Initiated by <b>nasal irritation</b>."), BL("<b>Afferent:</b> Cranial nerve V (trigeminal) → medulla."), BL("Uvula depresses → air directed through nose → clears nasal passages."), SP(6), ] # ── SECTION 9: VOCALIZATION ─────────────────────────────────────────────────── story += [ H1("9. Vocalization"), SP(4), H2("9.1 Components of Speech"), BL("<b>Phonation</b>: larynx produces sound via vocal cord vibration."), BL("<b>Articulation</b>: mouth structures shape the sound."), SP(4), H2("9.2 Phonation & Pitch Control"), BL("Vocal cords protrude into the glottis; widely open during breathing; approximate during speech."), BL("Anterior attachment: <b>thyroid cartilage</b> (Adam's apple)."), BL("Posterior attachment: <b>arytenoid cartilages</b> (articulate with cricoid cartilage)."), BL("<b>Pitch</b> determined by: stretch of cords, tightness of approximation, mass of cord edges."), BL("Thyroarytenoid muscles loosen cords / modify edge mass to alter pitch."), BL("Forward rotation of thyroid or posterior rotation of arytenoids → stretch cords → higher pitch."), SP(8), HR(), B("<i>End of Lectures 12–13 Study Notes | Respiratory Physiology</i>"), ] doc.build(story) print("PDF generated successfully.") PYEOF python3 /home/daytona/workspace/respiratory-notes/generate_notes.py