WHO antiseptic chlorhexidine alcohol povidone iodine patient safety guidelines skin preparation

antiseptics AND skin preparation

diagram mechanisms antiseptics chlorhexidine alcohol iodine microbial cell membrane

PMID: 40125257

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mkdir -p "/tmp/workspace/antiseptics-ppt/src" "/tmp/workspace/antiseptics-ppt/output" && python -c "import pptx, sys; print('python-pptx', pptx.__version__)"

python - <<'PY' from pathlib import Path p=Path('/tmp/workspace/antiseptics-ppt/src/create_deck.py') p.write_text(r'''from pptx import Presentation from pptx.util import Inches, Pt from pptx.dml.color import RGBColor from pptx.enum.shapes import MSO_SHAPE, MSO_CONNECTOR from pptx.enum.text import PP_ALIGN, MSO_ANCHOR from pptx.enum.dml import MSO_THEME_COLOR from pptx.enum.text import MSO_AUTO_SIZE OUT='/tmp/workspace/antiseptics-ppt/output/Antiseptics_Under_the_Microscope.pptx' prs=Presentation(); prs.slide_width=Inches(13.333); prs.slide_height=Inches(7.5) blank=prs.slide_layouts[6] # palette NAVY=RGBColor(8,31,58); BLUE=RGBColor(18,102,173); CYAN=RGBColor(33,188,211); TEAL=RGBColor(10,151,141) PINK=RGBColor(224,55,126); ORANGE=RGBColor(244,150,35); RED=RGBColor(206,55,65); GREEN=RGBColor(28,155,108) WHITE=RGBColor(255,255,255); INK=RGBColor(25,42,58); GREY=RGBColor(93,109,124); PALE=RGBColor(244,248,251); LINE=RGBColor(214,225,233) def rect(sl,x,y,w,h,fill,rad=False,line=None): sh=sl.shapes.add_shape(MSO_SHAPE.ROUNDED_RECTANGLE if rad else MSO_SHAPE.RECTANGLE, Inches(x),Inches(y),Inches(w),Inches(h)) sh.fill.solid(); sh.fill.fore_color.rgb=fill; sh.line.color.rgb=(line or fill); return sh def text(sl,txt,x,y,w,h,size=18,color=INK,bold=False,align=PP_ALIGN.LEFT,font='Aptos',val=MSO_ANCHOR.MIDDLE): tb=sl.shapes.add_textbox(Inches(x),Inches(y),Inches(w),Inches(h)); tf=tb.text_frame; tf.clear(); tf.word_wrap=True tf.margin_left=tf.margin_right=Inches(.03); tf.margin_top=tf.margin_bottom=Inches(.02); tf.vertical_anchor=val p=tf.paragraphs[0]; p.alignment=align; r=p.add_run(); r.text=txt; r.font.name=font; r.font.size=Pt(size); r.font.bold=bold; r.font.color.rgb=color return tb def bullet(sl,items,x,y,w,h,size=17,color=INK,accent=BLUE): tb=sl.shapes.add_textbox(Inches(x),Inches(y),Inches(w),Inches(h)); tf=tb.text_frame; tf.clear(); tf.word_wrap=True tf.margin_left=Inches(.02); tf.margin_right=Inches(.02); tf.margin_top=Inches(.02); tf.margin_bottom=Inches(.02) for i,item in enumerate(items): p=tf.paragraphs[0] if i==0 else tf.add_paragraph(); p.text=item; p.level=0; p.font.name='Aptos'; p.font.size=Pt(size); p.font.color.rgb=color; p.space_after=Pt(11); p.bullet=True return tb def header(sl,num,title,kicker='ANTISEPTICS UNDER THE MICROSCOPE'): rect(sl,0,0,13.333,.22,TEAL); text(sl,kicker,.55,.32,7,.28,10,TEAL,True); text(sl,title,.55,.63,11.9,.62,27,NAVY,True) rect(sl,12.22,.45,.55,.55,NAVY,True); text(sl,str(num),12.22,.45,.55,.55,15,WHITE,True,PP_ALIGN.CENTER) rect(sl,.55,7.1,12.23,.02,LINE); text(sl,'Semester 5 Practical Classes | 10-minute presentation',.55,7.17,7,.18,9,GREY); text(sl,f'{num:02d} / 12',11.8,7.17,.98,.18,9,GREY,False,PP_ALIGN.RIGHT) def card(sl,x,y,w,h,title,body,accent=BLUE,fs=15): rect(sl,x,y,w,h,WHITE,True,LINE); rect(sl,x,y,.10,h,accent); text(sl,title,x+.25,y+.22,w-.45,.35,16,INK,True); text(sl,body,x+.25,y+.67,w-.45,h-.82,fs,GREY) def microbe(sl,x,y,kind='bacteria',c=CYAN): # abstract microbe / cell sh=sl.shapes.add_shape(MSO_SHAPE.OVAL,Inches(x),Inches(y),Inches(1.15),Inches(.72)); sh.fill.solid(); sh.fill.fore_color.rgb=c; sh.fill.transparency=18; sh.line.color.rgb=WHITE for dx,dy in [(.13,.16),(.43,.38),(.78,.17)]: d=sl.shapes.add_shape(MSO_SHAPE.OVAL,Inches(x+dx),Inches(y+dy),Inches(.12),Inches(.12));d.fill.solid();d.fill.fore_color.rgb=NAVY;d.line.color.rgb=NAVY def arrow(sl,x1,y1,x2,y2,c=TEAL): l=sl.shapes.add_connector(MSO_CONNECTOR.STRAIGHT,Inches(x1),Inches(y1),Inches(x2),Inches(y2));l.line.color.rgb=c;l.line.width=Pt(2);l.line.end_arrowhead=True # 1 title s=prs.slides.add_slide(blank); rect(s,0,0,13.333,7.5,NAVY); rect(s,0,0,13.333,.18,TEAL) # decorative cells for x,y,c in [(9.8,1.1,CYAN),(11.3,2.0,TEAL),(10.4,4.9,PINK),(8.8,5.7,ORANGE)]: microbe(s,x,y,c=c) text(s,'ANTISEPTICS\nUNDER THE MICROSCOPE',.7,.9,7.8,1.65,33,WHITE,True) text(s,'Mechanisms, clinical effectiveness, and patient safety',.73,2.75,7.6,.5,21,RGBColor(182,224,232)) rect(s,.73,3.65,5.6,.58,TEAL,True);text(s,'A 10-minute, evidence-based clinical overview',.95,3.65,5.15,.58,16,WHITE,True) text(s,'Name: ____________________ | Course: ____________________',.73,6.42,7.8,.3,13,RGBColor(190,208,221)) text(s,'“The right agent, at the right site, with the right technique.”',.73,5.72,7.6,.36,16,WHITE,False) # 2 objectives s=prs.slides.add_slide(blank); header(s,2,'What should we be able to decide?') text(s,'Three questions guide safe antiseptic use:',.58,1.45,6.8,.36,19,GREY) for i,(n,t,b,c) in enumerate([('01','WHAT?','Recognize the major agents and their microbiological targets.',BLUE),('02','WHY?','Link mechanism and formulation to clinical effectiveness.',TEAL),('03','HOW?','Choose and apply an agent without creating avoidable harm.',PINK)]): x=.72+i*4.17; rect(s,x,2.05,3.72,3.42,WHITE,True,LINE); rect(s,x+.25,2.32,.64,.64,c,True);text(s,n,x+.25,2.32,.64,.64,17,WHITE,True,PP_ALIGN.CENTER);text(s,t,x+.25,3.2,3.05,.35,17,c,True);text(s,b,x+.25,3.7,3.04,1.08,17,INK) text(s,'Key idea: antisepsis is not a product choice alone. It is a product + patient + site + technique decision.',.73,5.95,11.7,.55,19,NAVY,True) #3 distinction s=prs.slides.add_slide(blank); header(s,3,'First distinction: antiseptic ≠ disinfectant') card(s,.72,1.52,5.65,3.5,'ANTISEPTIC','Applied to living tissue to reduce or inhibit microorganisms. It must balance antimicrobial activity with host-tissue tolerability.',TEAL,19) card(s,6.95,1.52,5.65,3.5,'DISINFECTANT','Applied to inanimate surfaces or equipment. A substance suitable for a surface may be too toxic for skin or mucosa.',ORANGE,19) text(s,'Why the distinction matters',.72,5.52,3.2,.35,18,NAVY,True); bullet(s,['“More potent” is not automatically safer or better.','Antiseptics supplement, but never replace, cleaning, sterile technique, or wound irrigation.'],.72,5.9,11.6,.85,16) #4 mechanisms s=prs.slides.add_slide(blank); header(s,4,'Under the microscope: three dominant mechanisms') # center microbe microbe(s,5.95,3.1,c=RGBColor(195,231,241)); text(s,'MICROBIAL\nCELL',5.82,3.84,1.4,.5,12,NAVY,True,PP_ALIGN.CENTER) for title,body,x,y,c,tag in [ ('Alcohols','Protein denaturation\nand membrane disruption',.75,1.65,BLUE,'FAST'), ('Chlorhexidine','Cell membrane disruption\nwith persistent binding\nto the skin',.75,4.55,TEAL,'PERSISTENT'), ('Iodophors','Free iodine oxidizes\nkey cellular components\nand membranes',8.55,1.65,ORANGE,'BROAD')]: rect(s,x,y,3.65,1.55,WHITE,True,LINE);rect(s,x,y,.1,1.55,c);text(s,title,x+.23,y+.2,2.65,.28,17,INK,True);rect(s,x+2.85,y+.17,.62,.28,c,True);text(s,tag,x+2.85,y+.17,.62,.28,9,WHITE,True,PP_ALIGN.CENTER);text(s,body,x+.23,y+.63,3.05,.7,14,GREY) arrow(s,4.38,2.45,5.82,3.25,BLUE); arrow(s,4.38,5.1,5.82,4.22,TEAL); arrow(s,8.55,2.45,7.22,3.25,ORANGE) text(s,'Mechanism affects speed, residual activity, spectrum, and toxicity.',.75,6.58,11.6,.3,17,NAVY,True,PP_ALIGN.CENTER) #5 comparison s=prs.slides.add_slide(blank); header(s,5,'Compare the workhorses, not the brand names') # table cols=[.75,3.15,5.1,7.1,9.05,10.75]; widths=[2.35,1.85,1.95,1.9,1.65,1.75] heads=['Agent','Onset','Residual activity','Typical strength','Strengths','Important limits'] for x,w,h in zip(cols,widths,heads): rect(s,x,1.45,w,.58,NAVY,True);text(s,h,x+.08,1.45,w-.16,.58,13,WHITE,True,PP_ALIGN.CENTER) rows=[('Alcohols','Rapid','None','70% ethanol\nor isopropyl','Fast; broad','Flammable; dries skin'),('Chlorhexidine','Rapid','Hours','Usually alcohol-based\nfor intact skin prep','Persistent action','Avoid eyes, middle ear, meninges'),('Povidone-iodine','1-3 min','Hours*','Often 10% solution','Broad spectrum','Irritant/allergic dermatitis; activity reduced by blood/serum')] ys=[2.18,3.48,4.78]; colors=[BLUE,TEAL,ORANGE] for y,row,c in zip(ys,rows,colors): for j,(x,w,val) in enumerate(zip(cols,widths,row)): rect(s,x,y,w,1.12,RGBColor(248,251,253),True,LINE); text(s,val,x+.08,y+.08,w-.16,.95,13,INK if j==0 else GREY,j==0,PP_ALIGN.CENTER) rect(s,.75,y,.09,1.12,c) text(s,'*Duration depends on conditions. Product instructions and local protocols determine actual concentrations and contact times.',.78,6.23,11.8,.32,12,GREY) #6 effectiveness s=prs.slides.add_slide(blank); header(s,6,'Clinical effectiveness: formulation and application both matter') rect(s,.7,1.48,4.08,4.65,RGBColor(235,248,248),True,RGBColor(192,225,220));text(s,'EVIDENCE SNAPSHOT',.98,1.78,3.5,.3,14,TEAL,True);text(s,'2%-2.5%\nchlorhexidine-alcohol',.98,2.28,3.4,1.05,29,NAVY,True);text(s,'was identified as the most effective preoperative option in a 2024 systematic review and meta-analysis of 18 RCTs (10,587 patients).',.98,3.62,3.38,1.25,16,INK);text(s,'Interpret with context: surgical type, formulation, local policy, contraindications.',.98,5.15,3.32,.65,13,GREY) text(s,'THE APPLICATION BUNDLE',5.33,1.62,5,.3,14,BLUE,True) steps=[('1','PRE-CLEAN','Remove visible soil or gross contamination.'),('2','COVER WIDELY','Prepare a broad area, including possible extension sites.'),('3','APPLY CORRECTLY','Use the correct applicator and contact time.'),('4','LET IT DRY','Drying supports efficacy and reduces fire risk with alcohol.')] for i,(n,t,b) in enumerate(steps): y=2.1+i*.93;rect(s,5.35,y,.46,.46,BLUE if i<3 else RED,True);text(s,n,5.35,y,.46,.46,14,WHITE,True,PP_ALIGN.CENTER);text(s,t,6.02,y,2.1,.24,15,NAVY,True);text(s,b,8.1,y-0.01,4.3,.5,14,GREY) text(s,'A good agent used poorly can fail.',5.35,6.1,6.3,.34,19,NAVY,True) #7 clinical cases s=prs.slides.add_slide(blank); header(s,7,'Clinical choices: select by site, purpose, and risk') items=[('A. Intact skin before surgery','Often an alcohol-containing preparation when appropriate. Allow complete drying before draping or electrosurgery.',BLUE),('B. Laceration repair','Clean surrounding skin, but avoid introducing antiseptic into the wound because it may be tissue-toxic.',ORANGE),('C. Near eyes or ear','Avoid chlorhexidine contact with cornea. Do not allow it into a perforated tympanic membrane because of ocular/ototoxic risk.',PINK),('D. Mucosal surface','Alcohol-containing products are generally unsuitable. Follow product labeling and local procedure protocol.',TEAL)] for i,(t,b,c) in enumerate(items): x=.72+(i%2)*6.08;y=1.48+(i//2)*2.35; rect(s,x,y,5.65,1.82,WHITE,True,LINE);rect(s,x,y,5.65,.12,c);text(s,t,x+.23,y+.31,5.1,.3,17,NAVY,True);text(s,b,x+.23,y+.76,5.05,.7,15,GREY) text(s,'Do not memorize one “best antiseptic.” Memorize a safe selection process.',.73,6.4,11.7,.35,18,NAVY,True,PP_ALIGN.CENTER) #8 safety s=prs.slides.add_slide(blank); header(s,8,'Patient safety: predictable hazards, preventable harm') for i,(title,body,c,icon) in enumerate([('CHEMICAL INJURY','Irritant or allergic contact dermatitis can occur. Prevent pooling and prolonged exposure.',ORANGE,'!'),('SITE-SPECIFIC TOXICITY','Chlorhexidine can injure cornea and may be ototoxic if it reaches the inner ear.',PINK,'◎'),('OPERATING-ROOM FIRE','Alcohol is flammable. Let it fully dry and avoid soaked drapes before ignition sources.',RED,'△'),('VULNERABLE SKIN','Neonates and damaged skin have higher susceptibility to injury and systemic absorption.',TEAL,'+')]): x=.7+(i%2)*6.12;y=1.48+(i//2)*2.34;rect(s,x,y,5.7,1.78,WHITE,True,LINE);rect(s,x+.22,y+.26,.58,.58,c,True);text(s,icon,x+.22,y+.26,.58,.58,21,WHITE,True,PP_ALIGN.CENTER);text(s,title,x+1.02,y+.29,4.25,.28,16,c,True);text(s,body,x+1.02,y+.75,4.25,.62,15,INK) text(s,'Safety check before application: allergy history | site restrictions | skin integrity | pooling | drying | ignition sources',.73,6.35,11.7,.36,16,NAVY,True,PP_ALIGN.CENTER) #9 resistance s=prs.slides.add_slide(blank); header(s,9,'A common misconception: antiseptics are not antibiotics') text(s,'Antiseptics act at multiple cellular targets and are used topically. Their correct use supports infection prevention, but does not replace antimicrobial stewardship.',.75,1.5,11.7,.55,19,INK) for i,(t,b,c) in enumerate([('DO','Use the recommended concentration, site, and contact/drying time.',GREEN),('DO NOT','Dilute, mix, or extend use beyond the product instructions.',RED),('REMEMBER','Visible contamination and biofilm can reduce performance: clean first.',BLUE)]): x=.75+i*4.15;rect(s,x,2.5,3.7,2.18,WHITE,True,LINE);rect(s,x+.23,2.78,.55,.55,c,True);text(s,'✓' if i==0 else ('×' if i==1 else 'i'),x+.23,2.78,.55,.55,22,WHITE,True,PP_ALIGN.CENTER);text(s,t,x+.23,3.58,3.0,.3,17,c,True);text(s,b,x+.23,4.02,3.1,.43,15,INK) rect(s,.75,5.45,11.75,.64,RGBColor(235,242,247),True);text(s,'Microbial reduction is a system outcome: agent + technique + asepsis + patient factors.',.95,5.45,11.35,.64,18,NAVY,True,PP_ALIGN.CENTER) #10 quiz s=prs.slides.add_slide(blank); header(s,10,'Audience check: what would you do?') rect(s,.77,1.45,11.75,1.25,NAVY,True);text(s,'A preoperative alcohol-based antiseptic has just been applied. The skin still looks wet. The surgeon asks for electrocautery.',1.05,1.7,11.2,.72,21,WHITE,True,PP_ALIGN.CENTER) text(s,'Choose the safest next action:',.75,3.23,5,.3,19,NAVY,True) for i,(opt,c) in enumerate([('A Start cautery now',RED),('B Blot quickly, then start',ORANGE),('C Wait until completely dry',GREEN)]): y=3.78+i*.72;rect(s,.85,y,5.6,.52,WHITE,True,LINE);rect(s,.85,y,.14,.52,c);text(s,opt,1.15,y,4.9,.52,17,INK,True) rect(s,7.02,3.32,4.92,1.75,RGBColor(237,250,246),True,RGBColor(187,230,210));text(s,'Answer: C',7.3,3.66,4.35,.35,23,GREEN,True);text(s,'Alcohol vapour and pooled liquid create a preventable fire hazard. Full drying is part of safe antisepsis.',7.3,4.19,4.1,.55,15,INK) text(s,'Pause point: This is why technique belongs in every product comparison.',.83,6.25,11.7,.32,17,GREY,False,PP_ALIGN.CENTER) #11 take homes s=prs.slides.add_slide(blank); header(s,11,'Three take-home messages') for i,(n,t,b,c) in enumerate([('1','MECHANISM MATTERS','Alcohols denature proteins, chlorhexidine disrupts membranes with persistence, and iodophors oxidize cellular targets.',BLUE),('2','EFFECTIVENESS IS CONTEXTUAL','The best choice considers tissue, procedure, formulation, contact time, and local guidance.',TEAL),('3','SAFETY IS AN ACTION','Avoid high-risk sites, prevent pooling, let alcohol dry, and recognize vulnerable patients.',PINK)]): x=.75+i*4.15;rect(s,x,1.66,3.72,3.95,WHITE,True,LINE);rect(s,x+.22,1.94,.65,.65,c,True);text(s,n,x+.22,1.94,.65,.65,20,WHITE,True,PP_ALIGN.CENTER);text(s,t,x+.22,2.96,3.05,.5,18,c,True);text(s,b,x+.22,3.72,3.05,1.2,16,INK) text(s,'Final clinical rule: never separate microbial efficacy from patient safety.',.75,6.3,11.7,.36,20,NAVY,True,PP_ALIGN.CENTER) #12 sources s=prs.slides.add_slide(blank); header(s,12,'References and discussion') text(s,'Key sources used in this presentation',.75,1.42,6,.35,20,NAVY,True) refs=[ 'Sabiston Textbook of Surgery, 22nd ed. “Preoperative Skin Preparation,” pp. 318-319.', 'Fitzpatrick’s Dermatology, 9th ed. “Topical Antiseptics,” p. 3744.', 'Roberts and Hedges’ Clinical Procedures in Emergency Medicine. “General Suturing Technique,” p. 787.', 'Yang L, et al. Efficacy of different preoperative antiseptics in preventing surgical-site infection: systematic review and meta-analysis of RCTs. Videosurgery Miniinv. 2024. PMID: 40125257.', 'WHO. Global guidelines for the prevention of surgical site infection. Use local hospital policy and product instructions for practice.' ] bullet(s,refs,.8,1.95,11.65,3.55,15,INK) rect(s,.8,5.88,11.7,.65,TEAL,True);text(s,'Questions?',.8,5.88,11.7,.65,25,WHITE,True,PP_ALIGN.CENTER) text(s,'Presentation design: 12 slides, planned for approximately 10 minutes.',.8,6.65,11.6,.24,11,GREY,False,PP_ALIGN.CENTER) # global slide labels / notes metadata custom prs.core_properties.title='Antiseptics Under the Microscope' prs.core_properties.subject='Mechanisms, clinical effectiveness, and patient safety' prs.core_properties.author='' prs.save(OUT) print(OUT) ''') PY python "/tmp/workspace/antiseptics-ppt/src/create_deck.py" python - <<'PY' from pptx import Presentation p='/tmp/workspace/antiseptics-ppt/output/Antiseptics_Under_the_Microscope.pptx' prs=Presentation(p) print('slides',len(prs.slides)) for i,s in enumerate(prs.slides,1): txt=' '.join(sh.text for sh in s.shapes if getattr(sh,'has_text_frame',False)).replace('\n',' | ') print(i, txt[:95]) PY

~/antiseptics-ppt/output

CDC surgical site infection antiseptic alcohol chlorhexidine patient safety skin preparation guideline

antiseptic skin preparation

~/

PMID: 39355996

python - <<'PY' from pathlib import Path p=Path('/tmp/workspace/antiseptics-ppt/src/create_25_slide_deck.py') p.write_text(r'''from pptx import Presentation from pptx.util import Inches, Pt from pptx.dml.color import RGBColor from pptx.enum.shapes import MSO_SHAPE from pptx.enum.text import PP_ALIGN, MSO_ANCHOR from pptx.enum.shapes import MSO_CONNECTOR OUT='/tmp/workspace/antiseptics-ppt/output/Antiseptics_Under_the_Microscope_25_Slides.pptx' prs=Presentation(); prs.slide_width=Inches(13.333); prs.slide_height=Inches(7.5); blank=prs.slide_layouts[6] N=RGBColor(8,31,58); B=RGBColor(19,102,173); T=RGBColor(11,151,141); C=RGBColor(32,185,210); O=RGBColor(240,148,35); P=RGBColor(220,52,125); R=RGBColor(201,61,67); G=RGBColor(30,151,106); W=RGBColor(255,255,255); I=RGBColor(28,43,56); GR=RGBColor(88,105,120); L=RGBColor(214,225,233); PA=RGBColor(245,249,252) def box(s,x,y,w,h,c=W,rad=True,line=L): sh=s.shapes.add_shape(MSO_SHAPE.ROUNDED_RECTANGLE if rad else MSO_SHAPE.RECTANGLE,Inches(x),Inches(y),Inches(w),Inches(h)); sh.fill.solid(); sh.fill.fore_color.rgb=c; sh.line.color.rgb=line if line else c; return sh def tx(s,a,x,y,w,h,fs=18,c=I,b=False,al=PP_ALIGN.LEFT): tb=s.shapes.add_textbox(Inches(x),Inches(y),Inches(w),Inches(h)); tf=tb.text_frame;tf.clear();tf.word_wrap=True;tf.margin_left=tf.margin_right=Inches(.04);tf.margin_top=tf.margin_bottom=Inches(.02);tf.vertical_anchor=MSO_ANCHOR.MIDDLE;p=tf.paragraphs[0];p.alignment=al;r=p.add_run();r.text=a;r.font.name='Aptos';r.font.size=Pt(fs);r.font.bold=b;r.font.color.rgb=c;return tb def bullets(s,arr,x,y,w,h,fs=16): tb=s.shapes.add_textbox(Inches(x), Inches(y), Inches(w), Inches(h));tf=tb.text_frame;tf.clear();tf.word_wrap=True;tf.margin_left=Inches(.05);tf.margin_top=Inches(.02) for k,a in enumerate(arr): p=tf.paragraphs[0] if k==0 else tf.add_paragraph();p.text=a;p.font.name='Aptos';p.font.size=Pt(fs);p.font.color.rgb=I;p.bullet=True;p.space_after=Pt(8) return tb def header(s,n,title,section='ANTISEPTICS UNDER THE MICROSCOPE'): box(s,0,0,13.333,.18,T,False,T);tx(s,section,.55,.28,8,.2,10,T,True);tx(s,title,.55,.57,11.55,.62,26,N,True);box(s,12.22,.45,.55,.55,N,True,N);tx(s,str(n),12.22,.45,.55,.55,15,W,True,PP_ALIGN.CENTER);box(s,.55,7.1,12.23,.02,L,False,L);tx(s,'Detailed clinical presentation | Use local policy and manufacturer instructions in practice',.55,7.16,9,.18,9,GR);tx(s,f'{n:02d} / 25',11.7,7.16,1.05,.18,9,GR,False,PP_ALIGN.RIGHT) def card(s,x,y,w,h,ttl,body,accent=B,fs=15): box(s,x,y,w,h,W,True,L);box(s,x,y,.1,h,accent,False,accent);tx(s,ttl,x+.22,y+.18,w-.38,.3,16,accent,True);tx(s,body,x+.22,y+.6,w-.38,h-.75,fs,GR) def micro(s,x,y,c=C): q=s.shapes.add_shape(MSO_SHAPE.OVAL,Inches(x),Inches(y),Inches(1.1),Inches(.72));q.fill.solid();q.fill.fore_color.rgb=c;q.fill.transparency=18;q.line.color.rgb=W for a,b in [(.18,.16),(.48,.37),(.8,.18)]: z=s.shapes.add_shape(MSO_SHAPE.OVAL,Inches(x+a),Inches(y+b),Inches(.12),Inches(.12));z.fill.solid();z.fill.fore_color.rgb=N;z.line.color.rgb=N def arrow(s,x1,y1,x2,y2,c=T): q=s.shapes.add_connector(MSO_CONNECTOR.STRAIGHT,Inches(x1),Inches(y1),Inches(x2),Inches(y2));q.line.color.rgb=c;q.line.width=Pt(2);q.line.end_arrowhead=True def standard(n,title,intro,cols=None,section='FOUNDATIONS'): s=prs.slides.add_slide(blank);header(s,n,title,section);tx(s,intro,.72,1.35,11.8,.56,19,I) if cols: for j,(ttl,body,col) in enumerate(cols):card(s,.72+j*(12.0/len(cols)),2.15,11.3/len(cols),3.35,ttl,body,col,16) return s #1 s=prs.slides.add_slide(blank);box(s,0,0,13.333,7.5,N,False,N);box(s,0,0,13.333,.18,T,False,T) for x,y,c in [(9.5,.95,C),(11.1,2.0,T),(9.1,5.3,P),(10.9,5.8,O)]:micro(s,x,y,c) tx(s,'ANTISEPTICS\nUNDER THE MICROSCOPE',.7,.9,7.8,1.65,33,W,True);tx(s,'Mechanisms, clinical effectiveness, and patient safety',.73,2.75,7.7,.45,21,RGBColor(189,224,232));box(s,.73,3.65,5.9,.58,T,True,T);tx(s,'Detailed 25-slide academic presentation',.98,3.65,5.35,.58,16,W,True);tx(s,'Name: ____________________ Course: ____________________',.73,6.38,7.9,.3,13,RGBColor(190,208,221)) #2 s=standard(2,'Learning objectives','By the end, the audience should be able to:',[('DEFINE','Differentiate antiseptics from disinfectants and explain why the distinction affects patient safety.',B),('COMPARE','Compare alcohols, chlorhexidine, iodophors, oxidizing agents, and selected specialty products.',T),('APPLY','Choose an agent using site, patient, procedure, technique, and safety constraints.',P)]) #3 s=standard(3,'Roadmap','The presentation moves from basic concepts to bedside decisions.',[('PART I','Foundations and microbiology\nSlides 4-8',B),('PART II','Major agents and mechanisms\nSlides 9-16',T),('PART III','Clinical effectiveness and safety\nSlides 17-25',P)]) #4 s=standard(4,'What is an antiseptic?','An antiseptic is a chemical agent applied to living tissue to reduce, inhibit, or destroy microorganisms.',[('ANTISEPSIS','Reduction of microbial burden on living tissue such as skin, mucosa, or selected wounds.',T),('DISINFECTION','Destruction of many or all microorganisms on inanimate objects. Surface products may harm tissue.',O),('STERILIZATION','Validated elimination of all microbial life, including spores, from instruments or materials.',B)]) #5 s=standard(5,'Why antisepsis matters','The aim is to lower the inoculum before it reaches vulnerable tissue. It is one part of a larger infection-prevention system.',[('SURGERY','Preoperative skin preparation reduces transient and commensal organisms. Skin flora cause many superficial SSIs.',B),('INVASIVE PROCEDURES','Venipuncture, catheter insertion, injections, and biopsy can introduce skin flora into sterile sites.',T),('WOUND CARE','Product selection must balance microbial control against cytotoxicity and wound healing.',P)]) #6 s=prs.slides.add_slide(blank);header(s,6,'Microbial targets: not all organisms are equally susceptible','Spectrum is important, but never the only criterion.'); for i,(a,b,c) in enumerate([('Vegetative bacteria','Usually susceptible to common clinical antiseptics.',B),('Enveloped viruses','Often susceptible to alcohols, iodophors, and chlorhexidine.',T),('Fungi & mycobacteria','Activity varies by agent and concentration.',O),('Bacterial spores','Many routine antiseptics, especially alcohols, are not reliably sporicidal.',R)]):card(s,.72+(i%2)*6.05,2.05+(i//2)*1.75,5.62,1.35,a,b,c,15) #7 s=standard(7,'What determines antiseptic performance?','The same product can perform differently depending on the environment and how it is used.',[('PRODUCT','Concentration, solvent, formulation, expiry date, and compatibility.',B),('MICROBE','Species, burden, biofilm, spores, and susceptibility pattern.',T),('CONTEXT','Organic soil, skin condition, contact time, surface area, and technique.',O)]) #8 s=prs.slides.add_slide(blank);header(s,8,'The sequence matters: clean, apply, wait, protect','Clinical effectiveness is a process, not merely a bottle label.'); steps=[('1','ASSESS','Check site, allergy history, skin integrity, mucosal exposure, and ignition risk.',B),('2','CLEAN','Remove visible soil or gross contamination before antiseptic application.',T),('3','APPLY','Use the correct agent, applicator, and coverage area.',O),('4','DRY','Allow full drying. This supports action and reduces alcohol-fire risk.',R),('5','MAINTAIN','Avoid recontamination and preserve aseptic technique.',P)] for i,(n,a,b,c) in enumerate(steps): x=.65+i*2.53;box(s,x,2.65,2.15,2.38,W,True,L);box(s,x+.75,2.9,.62,.62,c,True,c);tx(s,n,x+.75,2.9,.62,.62,18,W,True,PP_ALIGN.CENTER);tx(s,a,x+.18,3.77,1.8,.3,15,c,True,PP_ALIGN.CENTER);tx(s,b,x+.18,4.18,1.8,.55,13,I,False,PP_ALIGN.CENTER) #9 s=standard(9,'Alcohols: ethanol and isopropyl alcohol','Alcohol-based preparations are widely used for intact-skin antisepsis and hand hygiene.',[('MECHANISM','Protein denaturation and membrane disruption.',B),('STRENGTHS','Rapid onset and broad activity against many bacteria, fungi, mycobacteria, and viruses.',T),('LIMITS','No persistent activity, reduced performance with soil, and poor activity against spores.',O)]) #10 s=standard(10,'Alcohols: key practice points','Use only on appropriate intact skin and according to the product directions.',[('CONCENTRATION','Common clinical formulations use approximately 70% alcohol. Do not improvise dilution.',B),('DRYING','Complete drying is required before draping, puncture, or any ignition source.',R),('CAUTION','Highly flammable. Avoid pooling and use caution around mucosa and damaged skin.',O)]) #11 s=standard(11,'Chlorhexidine: mechanism and spectrum','Chlorhexidine is a biguanide antiseptic commonly used for skin preparation and selected decolonization protocols.',[('MECHANISM','Disrupts microbial cell membranes. It binds to skin, producing persistent activity.',T),('SPECTRUM','Good Gram-positive and Gram-negative activity; variable antiviral activity. Limited activity against spores.',B),('ADVANTAGE','Rapid onset, persistence for hours, and additive effect with repeated application.',G)]) #12 s=standard(12,'Chlorhexidine: clinical uses','Actual formulation and indication should follow local policy and manufacturer labeling.',[('PREOPERATIVE SKIN','Often used in an alcohol-based preparation for intact surgical skin.',T),('VASCULAR ACCESS','Frequently used for catheter and blood-culture skin antisepsis where permitted.',B),('BATHING / ORAL CARE','Used in defined protocols, not as a universal replacement for routine hygiene.',P)]) #13 s=standard(13,'Chlorhexidine: safety boundaries','Chlorhexidine can cause serious harm if used at the wrong site.',[('EYE','Direct contact can cause keratitis or corneal ulceration. Protect the eyes.',R),('EAR','Avoid entry into the middle ear, particularly with tympanic membrane perforation because of ototoxicity risk.',O),('ALLERGY','Rare immediate hypersensitivity and anaphylaxis can occur. Ask, document, and avoid re-exposure.',P)]) #14 s=standard(14,'Iodophors: povidone-iodine','Iodophors release free iodine, making iodine more usable and less irritating than elemental iodine.',[('MECHANISM','Free iodine oxidizes microbial cellular components and membranes.',O),('SPECTRUM','Broad activity against bacteria, fungi, mycobacteria, and viruses.',B),('ONSET / DURATION','Typical onset is about 1-3 minutes; activity may be reduced by blood or serum.',T)]) #15 s=standard(15,'Povidone-iodine: uses and limitations','A useful option when chlorhexidine is unsuitable, subject to procedure-specific practice.',[('USES','Skin preparation; selected mucosal, ophthalmic, and wound contexts using purpose-designed formulations.',O),('LIMITATIONS','Irritant or allergic contact dermatitis may occur. Prolonged exposure or pooling can injure tissue.',R),('NOT INTERCHANGEABLE','Ophthalmic preparations and concentrations differ from routine skin products.',B)]) #16 s=standard(16,'Other antiseptics: where do they fit?','Specialty products may have a role, but should not be assumed equivalent to standard preoperative skin preparations.',[('HYDROGEN PEROXIDE','Oxidizing agent with bubbling action. Can be tissue irritating and is not a routine substitute for skin prep.',O),('HYPOCHLOROUS ACID','Used in some wound-care settings. Recent wound evidence suggests favorable therapeutic-index values for selected organisms.',T),('PHMB / OCTENIDINE','Used in some regions and wound-care products. Indications and availability vary by jurisdiction.',P)]) #17 s=prs.slides.add_slide(blank);header(s,17,'Quick comparison of main agents','Selection requires more than a “best product” slogan.'); heads=['Feature','Alcohol','Chlorhexidine','Povidone-iodine'];vals=[('Primary action','Protein denaturation','Membrane disruption','Oxidation by free iodine'),('Onset','Rapid','Rapid','Usually 1-3 min'),('Residual activity','None','Persistent','Variable, hours'),('Major caution','Flammability','Eyes / middle ear / allergy','Dermatitis / tissue exposure')] xs=[.68,3.0,5.72,8.45,11.16];ws=[2.25,2.65,2.65,2.65,1.4] for x,w,a in zip(xs[:4],ws[:4],heads):box(s,x,1.55,w,.52,N,True,N);tx(s,a,x+.05,1.55,w-.1,.52,14,W,True,PP_ALIGN.CENTER) for r,row in enumerate(vals): y=2.15+r*.85 for j,a in enumerate(row):box(s,xs[j],y,ws[j],.68,PA,True,L);tx(s,a,xs[j]+.08,y,ws[j]-.16,.68,13,I,j==0,PP_ALIGN.CENTER) tx(s,'Clinical choice must also consider the site, patient vulnerabilities, intended procedure, formulation, and policy.',.75,6.12,11.7,.38,17,N,True,PP_ALIGN.CENTER) #18 s=standard(18,'Evidence: surgical-site infection prevention','Evidence trends toward alcohol-containing preparations for intact preoperative skin when appropriate.',[('TEXTBOOK EVIDENCE','Sabiston notes alcohol-containing products had the greatest probability of effectiveness in a 2015 Cochrane review, while evidence quality was low.',B),('TRIAL EXAMPLE','A cited multicenter comparison reported lower SSI with chlorhexidine-alcohol than povidone-iodine scrub/paint: 9.5% vs 16.1%.',T),('RECENT REVIEW','A 2024 systematic review/meta-analysis of 18 RCTs (10,587 patients) found 2%-2.5% chlorhexidine-alcohol most effective across included studies.',P)]) #19 s=standard(19,'Evidence: interpret results carefully','Comparative effectiveness depends on the population, surgery, formulation, comparator, and outcome definition.',[('DO NOT OVERGENERALIZE','One study does not establish the same “best agent” for eyes, mucosa, neonates, wounds, or every procedure.',O),('FORMULATION MATTERS','Aqueous versus alcohol-based products cannot be treated as the same intervention.',B),('IMPLEMENTATION MATTERS','Inadequate coverage, short contact time, and failure to dry can erase expected benefit.',T)]) #20 s=standard(20,'Application technique: preoperative intact skin','Use local institutional policy and the product’s instructions for use.','') if False else None s=prs.slides.add_slide(blank);header(s,20,'Application technique: preoperative intact skin');tx(s,'Core elements described in surgical texts and infection-prevention protocols:',.72,1.35,11.7,.35,18,I) for i,(t,b,c) in enumerate([('PREPARE A WIDE FIELD','Include the planned incision and potential extension sites.',B),('MOVE CLEAN TO LESS CLEAN','Commonly start centrally and move outward in concentric fashion.',T),('USE THE DEDICATED APPLICATOR','Avoid contaminating product containers or reusing single-use applicators.',O),('ALLOW DRYING','Adequate drying is part of the technique, especially for alcohol-based products.',R)]):card(s,.72+(i%2)*6.05,2.05+(i//2)*1.8,5.62,1.38,t,b,c,15) #21 s=standard(21,'Wounds, mucosa, and sensitive tissue','These sites require a different risk-benefit balance than intact surgical skin.',[('OPEN WOUNDS','Clean the surrounding skin but avoid introducing antiseptic into the wound when tissue toxicity is a concern.',O),('MUCOSA','Alcohol-containing solutions should generally be avoided. Use products specifically labeled for the site.',P),('EYE / PERIOCULAR AREA','Use sterile ophthalmic povidone-iodine preparations where indicated, not routine skin products.',B)]) #22 s=standard(22,'Special populations: neonates and fragile skin','Vulnerable skin alters absorption and injury risk. Be conservative and protocol-driven.',[('NEONATES','Immature skin and large surface-area-to-weight ratio increase risk of chemical injury and systemic exposure.',P),('DAMAGED SKIN','Inflammation, burns, dermatitis, and ulcers reduce barrier function and may increase irritation.',O),('ALLERGY HISTORY','Differentiate true allergy from irritation where possible, but treat suspected serious reactions as a safety alert.',R)]) #23 s=standard(23,'Preventing antiseptic-related operating-room fires','Alcohol-based skin preparations are a recognized fire risk when vapour or liquid is exposed to an ignition source.',[('PREVENT POOLING','Use only the necessary volume and prevent solution from collecting in hair, folds, linens, or drapes.',R),('LET IT DRY','Do not drape or use electrosurgery until the product has fully dried.',O),('TEAM COMMUNICATION','The team should confirm drying before activation of an ignition source.',B)]) #24 s=prs.slides.add_slide(blank);header(s,24,'Clinical decision algorithm','Ask these questions before choosing and applying an antiseptic.'); qs=[('1. Where?','Intact skin, wound, mucosa, eye, ear, or catheter site?'),('2. Who?','Neonate, allergy history, fragile skin, or special vulnerability?'),('3. What procedure?','Surgery, injection, line insertion, laceration repair, or wound care?'),('4. Which formulation?','Appropriate concentration, solvent, labeled indication, and local policy?'),('5. Can it be used safely?','No pooling, no unsafe site exposure, adequate contact/drying time, no ignition risk?')] for i,(a,b) in enumerate(qs): y=1.42+i*.94;box(s,.75,y,11.75,.68,PA,True,L);box(s,.9,y+.1,.48,.48,[B,T,O,P,R][i],True,[B,T,O,P,R][i]);tx(s,str(i+1),.9,y+.1,.48,.48,15,W,True,PP_ALIGN.CENTER);tx(s,a,1.58,y,2.15,.68,16,N,True);tx(s,b,3.73,y,8.35,.68,15,I) #25 s=prs.slides.add_slide(blank);header(s,25,'Key messages and references',''); tx(s,'Key messages',.74,1.28,3.4,.3,20,N,True);bullets(s,['Antiseptics must be selected for the tissue, patient, procedure, and product formulation.','Alcohols are rapid but nonpersistent and flammable.','Chlorhexidine offers persistence but must be kept away from eyes and middle ear.','Povidone-iodine is broad-spectrum but can irritate and may be reduced by organic material.','Correct technique, including drying, is a patient-safety intervention.'],.75,1.72,6.1,3.5,15) tx(s,'Selected references',7.0,1.28,4,.3,20,N,True);bullets(s,['Sabiston Textbook of Surgery, 22nd ed. “Preoperative Skin Preparation,” pp. 318-319.','Fitzpatrick’s Dermatology, 9th ed. “Topical Antiseptics,” p. 3744.','Roberts and Hedges’ Clinical Procedures in Emergency Medicine. “General Suturing Technique,” p. 787.','Yang L, et al. Systematic review/meta-analysis of preoperative antiseptics. 2024. PMID: 40125257.','Geng RSQ, et al. Topical antiseptics in wound care: systematic review. 2025. PMID: 39355996.'],7.0,1.72,5.35,3.6,13) box(s,.75,5.8,11.75,.65,T,True,T);tx(s,'Thank you | Questions and discussion',.75,5.8,11.75,.65,23,W,True,PP_ALIGN.CENTER) prs.core_properties.title='Antiseptics Under the Microscope - Detailed 25 Slide Presentation';prs.core_properties.subject='Mechanisms, clinical effectiveness, and patient safety';prs.save(OUT);print(OUT) ''') PY python "/tmp/workspace/antiseptics-ppt/src/create_25_slide_deck.py" python - <<'PY' from pptx import Presentation p='/tmp/workspace/antiseptics-ppt/output/Antiseptics_Under_the_Microscope_25_Slides.pptx';q=Presentation(p);print('slide count',len(q.slides));print('size',__import__('os').path.getsize(p)); for n,s in enumerate(q.slides,1): texts=[sh.text.replace('\n',' ') for sh in s.shapes if getattr(sh,'has_text_frame',False) and sh.text.strip()];print(n, texts[1][:55] if len(texts)>1 else texts[0][:55]) PY

~/antiseptics-ppt/output