PubMed Health⌕ Search

Biomedical subjects

D L Carr-Locke

Publications and source records attributed to D L Carr-Locke.

At least 73 records · Page 4Linked to original sources
PubMed1994

Pseudocyst drainage predisposes to infection when pancreatic necrosis is unrecognized.

OBJECTIVE: The objective of this report was to determine the clinical outcome of intervention among patients with a pancreatic pseudocyst associated with sterile pancreatic necrosis. METHODS: We reviewed records of all patients with sterile pancreatic necrosis who required intervention during the past 10 yr. RESULTS: A total of 17 patients required intervention. Twelve with sterile necrosis unassociated with a pancreatic pseudocyst underwent surgical debridement. An additional five patients with sterile necrosis associated with a pancreatic pseudocyst underwent drainage of the pseudocyst (two by pigtail catheter drainage, one by endoscopic cyst gastrostomy, and two by surgical cyst gastrostomy). After drainage, four of these five patients developed pancreatic infection that required surgical debridement. Pancreatic infection occurred because the drainage procedures in these four patients failed to remove the underlying necrotic material. CONCLUSIONS: When a pancreatic pseudocyst occurs in association with pancreatic necrosis, radiological and endoscopic decompression should not be attempted.

Adult↗
PubMed1993

Routine cholangiography is not warranted during laparoscopic cholecystectomy.

The role of intraoperative cholangiography during laparoscopic cholecystectomy was prospectively evaluated in 514 patients undergoing laparoscopic cholecystectomy. Before surgery, all patients were assigned to one of three groups depending on the likelihood of their having common bile duct stones. Stratification was based on objective historical, laboratory, or radiologic criteria. In 453 patients deemed unlikely to have stones, laparoscopic cholecystectomy was performed without cholangiography. Of these patients, four had retained stones (0.9%). In 25 patients likely to have stones, preoperative endoscopic retrograde cholangiopancreatography identified stones in six patients (24%). In 36 patients whose likelihood of having stones was deemed indeterminate, intraoperative cholangiography was performed at laparoscopic cholecystectomy. A common bile duct stone was identified in one patient (2.8%). One common bile duct injury occurred in the group deemed unlikely to have stones, and this injury would not have been prevented by intraoperative cholangiography. We conclude that preoperative assessment will identify common bile duct stones and that routine cholangiography is not warranted. Meticulous dissection of the cystic duct at its origin at the infundibulum will prevent common bile duct injury.

Adolescent↗
PubMed1993

Assessment of main pancreatic duct integrity by endoscopic retrograde pancreatography in patients with acute pancreatitis.

The integrity of the main pancreatic duct (MPD) was evaluated by endoscopic retrograde pancreatography (ERP) in a retrospective study of 105 patients with acute pancreatitis presenting over an 11-year period (1980-1991). The findings were compared with clinical outcome and the need to operate for local pancreatic complications. Patients were divided into two groups. Group 1 (n = 89) had either clinically mild pancreatitis or severe disease but no surgery for local complications, and < 25 per cent necrosis on contrast-enhanced computed tomography (CT) (n = 48). Group 2 patients (n = 16) had clinically severe pancreatitis and underwent surgery for local complications and/or had > or = 25 per cent necrosis on CT (n = 12), at surgery or post mortem. All 89 patients in group 1 had an intact MPD at ERP, which was performed a median of 6 (range 0-30) days after onset of pancreatitis; the median age was 63 (range 20-88) years and there were no deaths. The median age of patients in group 2 was 59 (range 26-85) years. ERP in this group was performed in four patients < 5 days after onset and all had an intact MPD; one died with necrosis and another from a cerebrovascular accident. ERP was performed > or = 5 days after onset in the other 12 patients; five had an intact MPD and two required surgery for pseudocyst drainage only; seven had a disrupted MPD and all required surgery for pancreatic necrosis (one death). It is concluded that an intact MPD was a feature of mild pancreatitis, whereas disruption occurred > 4 days after onset in patients with necrosis necessitating surgery.

Acute Disease↗
PubMed1993

Role of endoscopy in gallstone pancreatitis.

Early identification of those patients presenting with acute pancreatitis due to gallstone disease is important since emergency intervention may prevent the development of local and systemic complications. Urgent biliary surgery carries unacceptably high morbidity and mortality rates, but endoscopic retrograde cholangiopancreatography in experienced centers appears to be safe and is the optimal method for the diagnosis of bile duct stones. Two randomized controlled prospective trials have shown an advantage for endoscopic sphincterotomy and bile duct clearance compared with supportive therapy when performed within 24 to 72 hours of admission in those patients whose symptoms are considered severe according to prognostic scoring systems.

Acute Disease↗
PubMed1993

Pathophysiology of the sphincter of Oddi.

Pathophysiology of the sphincter of Oddi--or sphincter of Oddi dysfunction--manifests as either a biliary-type pain syndrome or recurrent pancreatitis. Imaging studies are unreliable, and direct endoscopic manometry is used to diagnose this entity. Milwaukee biliary classification, in addition to manometry, helps guide therapy. Endoscopic sphincterotomy in selected patients achieves permanent relief of symptoms. Endoscopic therapy for recurrent pancreatitis is still experimental.

Gastrointestinal Motility↗
PubMed1993

Endoscopic band ligation of esophageal varices.

Endoscopic sclerotherapy of esophageal varices rapidly became the standard initial nonsurgical method for control of hemorrhage. Although in widespread use around the world, the technique is associated with a significant complication rate that excludes it as a potential method for primary prophylaxis. The sclerotherapy technique has been difficult to standardize between different endoscopists and centers, with consequent incongruities in trial results and morbidity. The introduction of endoscopic band ligation heralds the possibility of a simple, reproducible method for acute and chronic treatment of varices and the hope that prophylactic eradication, before the first life-threatening hemorrhage, can be achieved safely and effectively.

Adolescent↗
PubMed1993

Failure of piezoelectric lithotripsy of a gallstone impacted in the gallbladder neck.

Failure of extracorporeal shockwave lithotripsy is most frequently related to total stone mass, the size of individual stones, or unrecognized stone calcification which interferes with the dissolution effects of orally administered bile salts. We report a case of piezoelectric extracorporeal shockwave lithotripsy failure in a young woman with a 2-cm stone impacted in the neck of the gallbladder. Despite adequate positioning of the shockwave focal point on two separate occasions, no fragmentation was achieved. The stone was subsequently retrieved after the woman underwent laparoscopic cholecystectomy. When treated ex vivo, the stone rapidly fragmented. We hypothesize that the impacted stone, lacking a uniform liquid interface, failed to fragment because of the inability of cavitational forces to achieve a surface effect.

Adult↗
PubMed1992

Biliary stent occlusion--a problem solved with self-expanding metal stents? European Wallstent Study Group.

The main limitation in the endoscopic palliation of malignant biliary obstruction is due to stent blockage. One of the factors thought to be of importance is the diameter of the endoprosthesis. In this paper, we report the results of a multicenter European study with a one cm diameter self-expanding metal stent (Wallstent) in 103 patients with malignant biliary obstruction. Insertion of the stent following guidewire positioning was successful in 97.1% of the patients without any cases of de novo cholangitis developing after the endoscopic procedure. The median follow-up for the entire group was 145 days. In all but 3 patients, the stent expanded to more than 80% of its maximum diameter. Two patients had ongoing cholangitis after stent insertion. Long-term complications manifested by late cholangitis, were seen in 18% of the cases after a median interval of 125 days. The occlusion rate by biliary sludge was 5% after a median time period of 175 days which is substantially less than the 21% occlusion rate reported for polyethylene stents. In conclusion, our results show that the Wallstent can be easily placed in distal and mid-CBD strictures after guidewire passage, with most of the patients having a- good drainage effect. The occlusion rate by biliary sludge is significantly less than for conventional polyethylene stents, but the occlusion by tumor ingrowth is substantial. A disadvantage is the high cost of the Wallstent. Further randomized trials will be required to determine the cost-benefit ratio for the use of this stent.

Adult↗
PubMed1992

The role of automated speech recognition in endoscopic data collection.

Speech recognition technology has developed substantially in the past half decade. Currently, large vocabulary, speaker independent, discrete recognizers are the state-of-the-art. This will change. Moderate sized, continuous recognition systems now exist in research settings. However, it is unlikely that such systems will be widely available until the mid to late 1990's. The accuracy rates of current speech recognition systems are high. Consequently, speech accuracy is not the current limiting aspect of using ASR. The limiting aspect of using ASR technology is the approach to integrating speech functionality into applications. One approach is to use ATNs as models of natural language to support both an input strategy and a text generation system. ATNs provide approaches to both syntactical correctness and semantic richness. This is an approach which plays to the strengths of the discrete nature of current speech technology and also provides a methodology for the capture and archiving of highly detailed information. The ATN approach avoids the natural language parsing problem created by a fully free form dictation interface. Evolving along with the underlying speech technology are standards in the definitions and criteria used in endoscopic practice. There are clear benefits from standards in this area. However, it is likely that this will also take several years and may never yield a universally accepted lexicon. Furthermore, there will be user interface barriers to surmount in any system attempting to use speech as an input modality. Because of the relatively large vocabularies used in medical discourse, the user interface will need to be carefully crafted.(ABSTRACT TRUNCATED AT 250 WORDS)

Data Collection↗
PubMed1992

Epidemiological study of abdominal tuberculosis among Indian migrants and the indigenous population of Leicester, 1972-1989.

A retrospective, epidemiological study of abdominal tuberculosis in the city of Leicester from 1972 to 1989 is reported. Potential cases were identified from hospital medical records and endoscopy lists, in addition to the county notification register. The city population of 280,000 included over 75,000 South Asians. There were 146 cases among South Asians and six in Europeans, four of whom were British. The standardised incidence of abdominal tuberculosis in South Asians decreased significantly from 22.3 cases/10(5)/year during the 1970s to 9.2 cases/10(5)/year in the 1980s (chi 2 = 42, p < 0.001). The incidence during the 1980s was 10.7/10(5)/year in Hindus, 8.7/10(5)/year in Sikhs, and 4.6/10(5)/year in Muslims. The relative risk to Hindus was 2.3 fold greater, and for Sikhs 1.9 fold greater, than that for Muslims, a finding similar to that in pulmonary tuberculosis. The standardised incidence in Europeans was 0.2/10(5)/year and they had significantly less abdominal tuberculosis than South Asians (Z = 8.6, p < 0.001 and relative risk = 46). The standardised mortality ratio was significantly increased in Europeans (standardised mortality ratio = 755, 95% confidence interval 90-2730, chi 2 = 11.4, p < 0.001), but not in South Asians (standardised mortality ratio = 68, 95% confidence interval 20-160). Resection rates were similar between the two ethnic groups. Abdominal tuberculosis still occurs among migrants, and clinicians should remain alert to this in South Asians.

Adolescent↗
PubMed1992

Irritable bowel syndrome: can the patient's response to colonoscopy help with diagnosis?

The irritable bowel syndrome (IBS) is a common disorder estimated to affect up to 20% of adult Caucasians, with only a small percentage requiring investigation. This prospective study was performed to substantiate the impression that patients with IBS experience more pain during endoscopic examination of the colon than do patients with other conditions. Patients with IBS were observed to experience significantly more pain during colonoscopy than did patients without IBS (median observed pain scores 46 and 9, respectively), p < 0.001. The intensity of the pain perceived during examination was significantly higher for patients with IBS than for those without IBS (median 52.5 and 23.5, respectively), p < 0.001. Within the groups, there was no significant difference between flexible sigmoidoscopy and colonoscopy in observed or perceived pain. 64% of the patients with IBS said that the pain experienced at colonoscopy was identical to their presenting pain. This study supports the hypothesis of a lower colonic pain threshold with colonic hyperalgesia in patients with IBS. We have found that hypersensitivity to the endoscopic examination of the colon is a useful clinical adjunct in the diagnosis of the IBS in those selected to undergo colonoscopy.

Colonic Diseases, Functional↗
PubMed1991

Laparoscopic cholecystectomy.

Laparoscopic cholecystectomy has emerged in the last 2 years as a unique procedure that offers the long-term advantages of open cholecystectomy without much of the short-term morbidity. Importantly, when compared with non-surgical approaches to symptomatic gallstones, it is suitable for virtually all patients rather than a highly-selected group as in the case of oral bile salt dissolution therapy or extracorporeal lithotripsy. Furthermore, it obviates the high recurrence rate seen with these techniques. Complications including bleeding and ductal injury appear to occur at a slightly higher rate than with traditional open cholecystectomy, but most surgeons who have had experience with the procedure predict that these complications will become rarer as more experience is gained. We may indeed be witnessing the first major successful challenge to traditional surgical management of symptomatic gallstone disease in 100 years.

Cholecystectomy↗
PubMed1991

Tube cecostomy as a cause of cecal pseudotumor.

A 60-year-old male presented with findings on radiographic and physical examination which were compatible with colonic obstruction. A tube cecostomy was performed. Colonoscopy seven months later revealed a pseudotumor composed of granulation tissue in the cecum at the site of the previous cecostomy.

Cecal Diseases↗
PubMed1991

Endoscopic band ligation for treatment of non-variceal upper gastrointestinal bleeding.

An endoscopic band ligation method was successful in achieving hemostasis in two patients who had severe coagulopathy and profuse gastrointestinal bleeding from a visible vessel in the stomach. Bleeding was not controlled by multiple epinephrine injections or BICAP electrocoagulation. The technique of band ligation was easy to perform and may provide an alternative treatment for non-variceal upper gastrointestinal bleeding in selected cases.

Aged↗
PubMed1991

Factors affecting the diameters of the common bile duct and pancreatic duct using endoscopic retrograde cholangiopancreatography.

Endoscopic retrograde cholangiopancreatography (ERCP) findings in 405 patients were analyzed to compare common bile duct (CBD) and main pancreatic duct (PD) diameters in relation to age, sex, gallbladder stones, CBD stones and acute pancreatitis. There were 129 patients with gallstones uncomplicated by pancreatitis, 131 patients with pancreatitis, and 145 control subjects. Significant correlations were found between CBD and PD diameters, and between these and age. Independently significant determinants of the CBD diameter were age, female, sex, CBD stones and gallbladder stones, as well as PD diameter. Conversely, PD diameter was significantly dependent upon age, CBD diameter, and acute pancreatitis. This study suggests that both CBD and PD dilation occurs in patients with gallstone disease. In view of the different factors which affect CBD and PD diameters (particularly age), important clinical decisions previously recommended on the basis of these duct diameters may need to be qualified.

Acute Disease↗
PubMed1990

Methyl-tert-butyl-ether for treating bile duct stones: the British experience.

Methyl-tert-butyl-ether (MTBE), infused via a nasobiliary catheter, was used to treat 33 patients with bile duct stones in nine units around Britain. MTBE contributed to success in 12 (36 per cent) cases: seven passed stones spontaneously during MTBE infusion and five had partial stone dissolution allowing subsequent endoscopic extraction. MTBE was non-contributory in 21 (64 per cent) cases: four passed stones after MTBE was stopped, six were treated by subsequent endoscopic techniques without evidence of dissolution, seven underwent surgery, and four were treated conservatively (with one death). In at least ten of the 21 cases in which MTBE was non-contributory, pigment stones were present. Forty-two complications occurred in 26 (79 per cent) patients. The efficacy of MTBE for treating bile duct stones might be improved by better methods of instillation and, since success may be related to technique, the use of MTBE should be restricted to units familiar with this chemical.

Cholelithiasis↗