Biomedical subjects

O R Ayeni

Publications and source records attributed to O R Ayeni.

3 recordsLinked to original sources

PubMed1981

Iatrogenic false aneurysms.

Of 270 patients operated upon for aneurysm, 25 patients underwent repair for 28 iatrogenic false aneurysms. Of these, 67.9% were complications of vascular reconstructive surgery and 64.3% occurred at the groin. Iatrogenic false aneurysm was associated with various prosthetic and suture materials and in many the attenuation of host arterial wall appeared to play an important role. Newer invasive procedures, such as arterial infusion of chemotherapeutic agents, also lead to formation of iatrogenic false aneurysm. Infections, present in 50% of the author's series, and intra-abdominal iatrogenic false aneurysm, with abdominal viscera forming part of the aneurysmal wall, posed a technical challenge. Iatrogenic false aneurysm is a potentially grave complication since the mortality and limb loss were each 8% in this series.

Aneurysm↗

PubMed1981

Common bile duct exploration: indications and results.

To ascertain the best diagnostic indicators of choledocholithiasis and to decrease the incidence of retained stones in the common bile duct after exploration, the authors carried out a retrospective review of 110 consecutive patients who underwent common bile duct exploration for calculous biliary tract disease. Conditions that were most often associated with choledocholithiasis were cholangitis and clinically obvious jaundice. The serum bilirubin level was helpful in identifying patients with stones in the common bile duct only when the value was greater than 6 mg/dl (103 mumol/l), and alkaline phosphatase only when the value was more than 250 IU (normal 110 IU). When stones are felt in the duct at operation, the diagnosis of choledocholithiasis is certain; positive operative cholangiograms are highly reliable and the coexistence of small gallstones and a dilated cystic duct is suggestive. The retention of stones is best prevented by careful exploration followed by high-quality T-tube cholangiography performed at operation after the exploration is complete. Any missed stones found in this way should be removed by re-exploration at the time of the original operation. Stones left in the common bile duct are best extracted nonoperatively under radiologic control. This technique, while effective and safe, is associated with considerable morbidity.

Cholangiography↗

PubMed1979

Recurrent obstipation as a complication of partial pancreatectomy for non-beta cell adenoma of the pancreas.

Verner and Morrison, in 1958, reported non-insulin-secreting tumours of the pancreas that were associated with a syndrome of refractory diarrhea, achlorhydria and hypokalemia. Surgical resection of such tumours results in rebound acid hypersecretion and cessation of the watery diarrhea. The authors report the case of an 84-year-old man who had three of the four major criteria for diagnosis of the Verner Morrison syndrome. Hypokalemia was absent, but this was possibly due to the large doses of potassium chloride that he was taking in conjunction with diuretics. After resection of the tumour severe obstipation with resultant bowel obstruction developed in addition to rebound hypersecretion and relief of watery diarrhea. Treatment, consisting of bulk laxatives in appropriate amounts, alleviated the obstipation.

Achlorhydria↗