Corrosive injury of esophagus BW.ppt

Corrosive injury of esophagus Philip WY Chiu Associate Professor Department of Surgery Prince of Wales Hospital Chinese University of Hong Kong...

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Corrosive injury of esophagus

Philip WY Chiu Associate Professor Department of Surgery Department of Surgery Prince of Wales Hospital Chinese University of Hong Kong

Background • Relatively rare Relatively rare • Dire emergency for UGI • Corrosive: – Substance that causes destruction of or damage  to living tissue on contact to living tissue on contact

• Prevalence – Varies geographically Varies geographically – Local domestic and industrial customs – Availability of substance y

Type of caustic related to injury Type of caustic related to injury • Acid – Generally less severe injury – Coagulative necrosis – Coagulum lessen tissue penetration Coagulum lessen tissue penetration

• Alkaline – – – –

Liquefactive necrosis Sodium hydroxide (哥士的) Very hazardous Very hazardous 30% causes full thickness necrosis  in animal model for a second  exposure

Early management Resuscitation • Upper airway U i – Assessment of severity of damage – Secure the airway Secure the airway • Fiberoptic intubation • Tracheostomy

• ? Dilution – May induce vomiting – i d ii more extensive injury i i j – Rapid action of caustics – probably useless

Early management Pathogenesis h • Animal studies Animal studies – Corrosive enter to stomach ‐> reflex pyloric spasm – Limit passage of corrosive to duodenum Limit passage of corrosive to duodenum – Regurgitation of corrosive against a closed  cricopharyngeus ‐> damage to esophagus and  ‐> damage to esophagus and stomach –3 3‐5 5 mins mins ‐>> gastric atonia gastric atonia ‐>> opening of pylorus opening of pylorus

Goldman et al Am J Gastro 1984

Early management Assessment of extent of injury f f • CXR  CXR – any pneumomediastinum any pneumomediastinum • Endoscopy – < 12 hrs & not later than 24 hrs < 12 h & t l t th 24 h Zargar’s grading of mucosal injury caused by corrosive ingestion G d 0 Grade

N Normal examination l i i

Grade 1

Edema & hypermia of the mucosa

Grade 2a

Superficial ulceration, erosions, friablility

Grade 2b

Grade 2a + deep discrete or circumferential ulcerations

Grade 3a

Small scattered areas of multiple ulceration & areas of necrosis  with brown black / greyish discoloration

Grade 3b

Extensive necrosis Zargar et al GIE 1991; Orringer 1993

Endoscopic assessment Endoscopic assessment

Endoscopic classification Implications l • Grade 1  Grade 1 – 2 – Conservative management – Insertion of feeding tube g

• Grade 3b Grade 3b – Immediate Surgical Resection

• Problems – Difficult to differentiate between 2b and 3 Difficult to differentiate between 2b and 3

Conservative management Use of Steroid? f d • AIM – Reduction of stricture formation – 80% of grade 3 injuries developed stricture 80% of grade 3 injuries developed stricture – 67% of grade 2 injuries developed pyloric sternosis

• RCT – 18 yr prospective study in 60 children – 10 / 31 steroid group developed stricture vs 10 / 31 steroid group developed stricture vs 11 / 29  11 / 29 non‐steroid group – No use in preventing stricture p g Anderson et al. NEJM 1990

Conservative management Conservative management • ICU care • IV antibiotics • IV PPI • Nutritional support • Close monitoring

Operative treatment Operative treatment • Indications – Full thickness injury of esophagus, stomach or  duodenum – Clinical deterioration with ↑sepsis  ↑

• Early Radical Surgery – 10 / 22 patients underwent esophagogastrectomy – 4 of 10 patients died (40%) – 7 of 12 conservative had stricture – Authors advocate early surgery Olah et al Orv Hetil 1992

Approach to emergency resection Approach to emergency resection • Laparotomy p y + Transhiatal + Cervical – Laparotomy first to assess the extent of disease in  abdomen – Transhiatal • Avoid opening the thorax • Risk of bleeding Risk of bleeding

• Laparotomy + Transthoracic Transthoracic + Cervical Cervical – Transthoracic • Need to open thorax • Extent of injury within thorax can be assessed

Emergency Esophagectomy Emergency Esophagectomy Author

Journal / yr

Gossot

Number

Method

Survival

J Thorac Cardiovasc Surg 29 1987

Transhiatal Stripping

62%

Brun

BJS 1984

17

Transhiatal Stripping

76.5%

Hendrickx

Acta Chir Belg 1990

1

Transhiatal Stripping

100%

Sarfati E

BJS 1987

44

Transhiatal

45.5%

Pruvot

Ann Chir 2003

28

Transhiatal Stripping /  exclusion

82%

Dapril

Surg Endosc 2007

1

Lap Transhiatal

100%

Next Step… Reconstruction Next Step… Reconstruction • Colonic interposition p – Left colon basing on left colic  artery – Right colon Right colon • Blood supply • Distal ileum can be used to  connect to esophagus connect to esophagus

– Isoperistaltic

• Route – Presternal – Retrosternall