Ultrasound of the common bile duct in patients undergoing cholecystectomy

Stott, M.; Farrands, Paul A.; Guyer, P.B.; Dewbury, K. C.; Browning, James

doi:10.1002/jcu.1870190203

Cited by 103 publications

(51 citation statements)

References 13 publications

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“…Current advanced optical imaging modalities cannot image through more than 5 mm of fat or require exogenous contrast agents [7][8][9]. Non-optical imaging modalities such as ultrasound can see through the fat, but have lower resolution and probes are typically too large for laparoscopic insertion [10,11]. Surgeons need a laparoscopic, non-invasive optical imaging modality which allows them to locate these ducts and other critical anatomy when embedded in fat.…”

Section: Introductionmentioning

confidence: 99%

Optical architecture design for detection of absorbers embedded in visceral fat

Francis

Florence

MacFarlane

2014

Biomed. Opt. Express

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Abstract:Optically absorbing ducts embedded in scattering adipose tissue can be injured during laparoscopic surgery. Non-sequential simulations and theoretical analysis compare optical system configurations for detecting these absorbers. For absorbers in deep scattering volumes, transillumination is preferred instead of diffuse reflectance. For improved contrast, a scanning source with a large area detector is preferred instead of a large area source with a pixelated detector. 1285-1302 (1998). 15. D. Contini, F. Martelli, and G. Zaccanti, "Photon migration through a turbid slab described by a model based on diffusion approximation. I. Theory," Appl. Opt. 36(19), 4587-4599 (1997). 16. S. Fantini, M. A. Franceschini, and E. Gratton, "Semi-infinite-geometry boundary problem for light migration in highly scattering media: A frequency-domain study in the diffusion approximation," J. Opt. Soc. Am. B. 11(10), 2128-2138 (1994).

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Section: Introductionmentioning

confidence: 99%

Optical architecture design for detection of absorbers embedded in visceral fat

Francis

Florence

MacFarlane

2014

Biomed. Opt. Express

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“…1,2 ). Moreover, clinical studies have suggested low sensitivity (25-82%) and limited specificity (56-100%) of TUS when detecting bile duct stones [2][3][4][5][6] . It's reported positive and negative predictive values are 69% and 78%, respectively 7 .…”

Section: Introductionmentioning

confidence: 99%

Endosonography Versus Endoscopic Retrograde Cholangiopancreatography in Diagnosing Extrahepatic Biliary Obstruction

Angelo¹,

Procházka²,

Holinka³

et al. 2011

BIOMED PAP

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Objective. Endosonography (EUS) performed prior to endoscopic retrograde cholangiopancreatography (ERCP) or surgery in patients with a low to moderate probability of choledocholithiasis can reduce morbidity, mortality and costs.Aims. This study aimed at evaluating the sensitivity and specificity of EUS and transabdominal ultrasonography (TUS) compared to ERCP in a cohort of 100 patients diagnosed with extrahepatic biliary obstruction.Methods. There were four working groups. The first group processed the initial data including history, physical examination and assessment of laboratory markers of cholestasis. The second group examined TUS. The third group examined the pancreas and biliary tree using EUS, always prior to ERCP. The fourth working group carried out ERCP.Results. The sensitivity and accuracy of EUS in the diagnosis of common bile duct dilatation were 84% and 83%, respectively, i.e. significantly higher (p=0.0001) than TUS (46% and 66%, respectively). The specificities of methods (82%, 91%) were not significantly different (p=0.218). The sensitivity and accuracy of EUS in the diagnosis of pathological content of the common bile duct were 88% and 92%, respectively, i.e. significantly higher (p<0.0001) than TUS (33% and 64%). The specificities of the methods (96%, 94%) were not significantly different (p=0.641).The incidence of choledocholithiasis in the high-risk group was significantly higher than in the moderate-risk group (p=0.012).Conclusion. Radial EUS is a method with high sensitivity, specificity, positive and negative predictive values. It should therefore be preferred to ERCP in patients with low or moderate risk of choledocholithiasis.

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“…Dies ist damit zu erklären, dass ein Teil dieser Befunde auch bei extrabiliären Erkrankungen wie Pankreatitis, Zirrhose oder Herzinsuffizienz zu finden ist. Gallengangssteine lassen sich mit der konventionellen Sonographie nicht mit genü-gender Sicherheit diagnostizieren (Sensitivität 36%), bei hinreichendem Verdacht muss eine Abklärung mithilfe der endoskopischen retrograden Cholangiographie (ERC;[33]) erfolgen. PTC).…”

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Cholostase und Leberinsuffizienz beim Intensivpatienten

et al. 2008

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Cornerstones of the diagnostic investigations of disturbances in liver function are analysis and sophisticated evaluation of serum liver enzymes, bilirubin and ammonia. Coagulation factors, serum albumin and cholinesterase levels are indicators of the hepatic metabolic capacity. Dynamic assessment of complex liver functions allows quantification of the hepatic metabolic activity and excretory function. Imaging techniques permit visualization of the size and texture of the liver, the vascular supply and perfusion as well as an assessment of the gall bladder and the extra-hepatic and intra-hepatic bile ducts. Manifold causes for cholestasis and/or liver dysfunction are known, such as ventilation with high pressure, total parenteral nutrition, shock, hypoxia and certain drugs. Obstructive cholestasis requires reconstitution of bile duct drainage, while non-obstructive cholestasis primarily requires treatment of the causative disease. The symptomatic therapy of liver insufficiency is rarely possible via direct treatment of the cause, but mostly requires specific management of secondary organ dysfunctions related to hepatic dysfunction including circulatory failure, hepatorenal syndrome and hepatic encephalopathy. In rare cases a temporary liver surrogate is necessary. The molecular absorbent recirculating system (MARS), a form of extracorporeal albumin dialysis, is introduced as a modality for the treatment of liver failure.

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Ultrasound of the common bile duct in patients undergoing cholecystectomy

Cited by 103 publications

References 13 publications

Optical architecture design for detection of absorbers embedded in visceral fat

Optical architecture design for detection of absorbers embedded in visceral fat

Endosonography Versus Endoscopic Retrograde Cholangiopancreatography in Diagnosing Extrahepatic Biliary Obstruction

Cholostase und Leberinsuffizienz beim Intensivpatienten

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