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Biomedical subjects

A Ovnat

Publications and source records attributed to A Ovnat.

At least 37 records · Page 2Linked to original sources
PubMed1989

A new approach to rectal anastomotic stricture.

A technique is presented that can serve as a solution for localized postoperative rectal stricture. This procedure was used after the failure of manual and instrumental dilatations. It consisted of cutting the prominent plication of the stricture, using the EEA stapler. Five patients successfully underwent this operation without morbidity or mortality, three after very low anterior resection and two after total colectomy, mucosal proctectomy, and ileoanal anastomosis.

Constriction, Pathologic↗
PubMed1989

Aggressive behavior of carcinoma of the colon associated with nonsecreting plasma cell myeloma. A case report.

A patient was diagnosed for nonsecreting myeloma stage IIIA (Salmon-Durie) 6 months after colectomy for adenocarcinoma of the colon, Duke's stage A. The patient had not received chemotherapy for the colonic carcinoma and its clinical course was much more aggressive than expected. Although it might be coincidental, to our knowledge this is the first reported case of an association between a nonsecreting myeloma and adenocarcinoma of the colon.

Adenocarcinoma↗
PubMed1988

Acute acalculous cholecystitis--experimental and clinical observations.

Induction of acute acalculous cholecystitis was studied in dogs. Designed models included ligation of the cystic artery and/or duct separately or combined and injection of colonic flora into the gallbladder. Cholecystectomy was performed 72 h later. Histological studies of the gallbladders and bile cultures demonstrated various degrees of cholecystitis, the severest form occurring as a result of cystic artery ligation, whereas the mildest was produced by injection of bacteria. Secondary infection was a constant feature of our experimental models.

Acute Disease↗
PubMed1987

Sigmoid perforation in patients with chronic constipation.

From 1976 to 1982, seven cases of free perforation of the sigmoid colon were treated at the Soroka University Hospital. None of the patients suffered any known underlying disease of the affected bowel such as malignancy, diverticulosis, stercoral ulcer, colitis, or trauma. The only feature common to all seven patients was a long history of chronic constipation. All patients were treated surgically with no mortality and with minimal morbidity. We believe that severe untreated chronic constipation may, on rare occasions, cause free perforation of the sigmoid colon.

Adult↗
PubMed1985

Cardiac arrhythmias during sleep in morbidly obese sleep-apneic patients before and after gastric bypass surgery.

Fourteen morbidly obese patients scheduled for gastric bypass surgery were diagnosed preoperatively as suffering from sleep apnea syndrome. There were 13 males and 1 female aged 24 to 59 years. Mean preoperative excessive body weight was 222 +/- 38%; mean apnea index prior to surgery was 84 +/- 44. A whole night lead II ECG tracing was performed as part of the polyhypnographic recordings and was evaluated for cardiac arrhythmias. Studies were performed in all patients preoperatively and 6 months thereafter. Statistical analysis was done using the Student's paired t-test. In this group a high incidence of atrial and ventricular arrhythmias was found. Marked sinus arrhythmia was encountered in all patients and extreme sinus bradycardia in 4 of them. In a consecutive sleep study performed 6 months postoperatively most cardiac arrhythmias disappeared. Marked sinus arrhythmia persisted in only two patients and severe ventricular premature beats (Lown's grade III-IV), found preoperatively in all patients, were still present postoperatively in only two, although in a much milder form. Surgical weight reduction, therefore, is a valuable method in the abolishment of life-threatening cardiac arrhythmias of the morbidly obese sleep-apneic patient.

Adult↗
PubMed1985

The effect of surgical weight reduction on sleep quality in obesity-related sleep apnea syndrome.

Obesity-related sleep apnea syndrome (SAS) was diagnosed in 13 patients evaluated for gastric bypass surgery. A diagnostic sleep study was performed whenever a specially designed questionnaire revealed characteristic signs of sleep disturbances. Pretreatment polyhypnographic recordings of patients with SAS demonstrated considerable reduction of deep and rapid eye movement (REM) sleep stages with a correspondent prolongation of wake within sleep or non-REM sleep stages I and II. After surgical weight reduction repeated polyhypnographic recordings revealed considerable improvement or even a complete recovery of breathing in sleep and a normalization of sleep structure. Non-REM deep sleep stages (III and IV) augmented from 5.51% +/- 2.53% (mean + SEM) to 22.69% +/- 3.56% (p less than 0.002), and the REM stage increased from 9.91% +/- 1.78% to 18.15% +/- 2.13% (p less than 0.005). Surgical weight reduction in obesity-related SAS is a valuable therapeutic measure for this respiratory derangement, as well as for sleep quality.

Female↗
PubMed1985

Incidence, etiology, diagnosis and treatment of cardiac tamponade in the Negev.

The files of 20 patients who required surgical intervention for cardiac tamponade between May 1976 and June 1983 were reviewed. The most frequently implicated etiological factors were viral or idiopathic (8 of 20 cases). Clinical signs of major importance were: tachycardia, 19 of 20; dyspnea, 17 of 20; and venous engorgement, 17 of 20. Valuable bedside examinations were the pulsus paradoxus for the cardiac tamponade of nontraumatic etiology and the central venous pressure examination for traumatic cardiac tamponade. Echocardiography was the most reliable laboratory examination. All patients were treated surgically either through a left thoracotomy or by the subxiphoid approach. Although both methods were equally effective in controlling this life-threatening condition, the latter technique resulted in a lower rate of postoperative complications.

Adolescent↗
PubMed1984

Sleep apnea syndrome in the morbidly obese as an indication for weight reduction surgery.

Fifteen morbidly obese patients with Sleep Apnea Syndrome (SAS) were studied during nocturnal sleep before and between 2 to 4 months after a weight reduction surgery. Six patients were also recorded between 4 to 8 months after surgery. Postoperative recordings revealed a dramatic reduction in the sleep apnea index and an improvement in sleep motility and daytime vigilance levels. A further decrease in apneas and sleep motility was seen in the late post-treatment recording. These results indicate that weight reduction surgery is an effective definitive treatment for obesity associated SAS.

Adult↗