Biomedical subjects
Publications and source records attributed to R Ramakantan.
A prospective serial follow-up after coil closure of patent ductus arteriosus in 84 patients showed a cumulative duct closure up to 96% at the end of 2 years. Five patients underwent transient recanalization, and 4 patients required repeat procedure for residual shunt or recanalization.
We describe our early experience with a new technique involving temporary balloon occlusion for transcatheter closure of patent ductus arteriosus (PDA) using single or multiple Gianturco coils. Coil occlusion was attempted in 21 patients of median age 3 (range 1-11) years, and angiographic PDA diameter 3.0 mm +/- 0.87 mm. The inflated balloon of a pulmonary wedge pressure catheter over a transductal wire was used to mechanically hold the first extruded loop of the coil at the pulmonary end of the duct. If a residual shunt persisted after the delivery of the first coil, additional coils were delivered with or without the balloon support. One to nine coils (median 2) of different sizes varying between 3-12 mm diameter and 4-15 cm length were used. Immediate angiographic occlusion rate was 47.6%. However color Doppler (CD) at 24 hours and at 6 weeks revealed complete closure in 66.6% and 80.9%, respectively. Blood transfusion was required in 2 (9.5%) patients. Three out of 56 coils (5.4%) embolized during deployment. The use of balloon occlusion is effective and safe in the treatment of ducti up to 4.7 mm. Residual shunts lend to occlude with time.
PURPOSE: To determine the efficacy of bronchial artery embolization in the control of massive hemoptysis due to pulmonary tuberculosis. MATERIALS AND METHODS: Between 1988 and 1994, 140 patients (125 men and 15 women; mean age, 31.5 years) who presented with massive hemoptysis (more than 300 mL of blood in 24 hours) underwent bronchial artery embolization. Fifty-one patients had received no antituberculosis drugs. Bronchial artery embolization was performed on the side with the greater abnormality on the chest radiograph. Catheters (4 F) and a gelatin sponge were used for embolization. Inflammatory hypervascularity was seen in all patients (five patients had contrast material extravasation and 10 patients had pseudoaneurysms). RESULTS: Almost complete control of hemoptysis was achieved in 102 patients. Of the remaining 38 patients with a notable amount of bleeding after the procedure, 29 were treated successfully with conservative measures and nine underwent re-embolization. Seven patients who underwent re-embolization had recurrent bleeding; four of these patients underwent successful surgery, and three died of aspiration. Two patients developed transient paraparesis 6 hours after the procedure. Nine patients reported transient referred pain to the ipsilateral orbit during injection of the gelatin sponge. One patient had transient dysphagia. CONCLUSION: Patients with massive hemoptysis due to pulmonary tuberculosis should first be treated with bronchial artery embolization.
During a brief period from March 1988 to January 1990 we were faced with 13 patients with malignant vertebral neoplasms (metastasis) of the thoracic spine. Nine of these had progressive extradural spinal cord compression with motor, sensory and sphincter involvement of varying degrees and duration. After proper evaluation these 9 cases were aggressively managed by preoperative embolisation of the tumour, transpedicular decompression and a same stage posterior metallic fixation. The immediate results were encouraging, with 2 patients showing total recovery and 3 showing partial recovery. All of the 9 operated cases were pain free postoperatively and could sit up unaided and be easily transferred to the Cancer Institute for back up chemotherapy and radiotherapy. They also improved psychologically, and cooperated well in their subsequent rehabilitation programme.
Cirrhotics with tense ascites fail to achieve increased diuresis in the supine position. To assess the role of inferior vena cava compression in this phenomenon, we studied cirrhotics with mild to moderate (n = 11) and tense (n = 2) ascites, and patients with membranous inferior vena cava obstruction (n = 2) before and after balloon dilatation, in the sitting, supine and 10 degrees head down tilted positions for 2 hours each. Urinary output (p < 0.005), creatinine clearance (p < 0.025) and sodium excretion (p < 0.025) increased in cirrhotics with mild to moderate ascites in the supine position, and further in the head down position. Similar changes occurred in patients with inferior vena cava membrane. In cirrhotics with tense ascites, these parameters did not change significantly in the supine position, but increased in the head down position. We conclude that failure to augment diuresis in the supine position in cirrhotics with tense ascites is not due to inferior vena cava obstruction alone but is probably also due to compression of the collateral vessels. This clinical observation may serve as a criterion for diagnosing tense ascites.
To investigate the possible role of vascular changes in the pathogenesis of tubercular lesions of the abdomen, findings on barium studies of the bowel and superior mesenteric angiography in 20 patients with abdominal tuberculosis were correlated. Barium studies showed peritoneal lesions in seven patients, isolated intestinal lesions in seven and combined lesions in six. Angiograms were abnormal in all the patients and showed encasement of arteries (13 patients), stretching and crowding of vessels (13), occlusion of vasa recta (5) and hypervascularity (6). All the 13 patients with peritoneal lesions showed arterial stretching, crowding and encasement. Five of six patients with strictures had occlusion of vasa recta. Of seven patients with ulcerations, six had hypervascularity. Our observations suggest that vascular changes occur frequently in abdominal tuberculosis and may explain some pathological and clinical manifestations of this disease. Ulcerated and hypervascular lesions occur in the active and early stages of the disease, and occlusive lesions are associated with healing and 'ischemic' bowel strictures.
This is a report of a patient on treatment for duodenal tuberculosis, who developed obstructive jaundice due to a benign stricture of the terminal common bile duct. This complication of duodenal tuberculosis, to our knowledge, has not been reported before. Percutaneous, transhepatic balloon dilatation of the stricture alleviated the jaundice.
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Of 104 patients with portal hypertension who were subjected to oesophageal variceal sclerotherapy, gastric varices were seen in 81 (78 per cent) at endoscopy and 69 (74 per cent) at splenoportography. In 50 (48 per cent) patients gastric varices were seen at the initial endoscopic examination and in 31 they developed during follow-up at intervals varying from 1 to 56 weeks. Gastric varices were seen significantly more often along the lesser curvature than in the gastric fundus and the left gastric vein was the main feeding vessel in 75 per cent of cases. Varices bled in nine of 81 patients and bleeding was seen significantly more often from fundal varices (30 per cent) than from lesser curve varices (5 per cent) (P less than 0.02). The incidence of gastric varices is high, and contrary to popular belief they are more often located along the lesser curvature of the stomach than in the gastric fundus.
Four patients with tuberculous fistulas communicating with the pharynx or the esophagus are reported. In 1 patient, there was strong evidence to suggest primary involvement of the esophageal mucosa. The other 3 cases were related to involvement of the pharynx or the esophagus from adjacent tuberculous process, as confirmed by histopathological proof. The patients had varying degrees of symptoms, which in two dramatically responded to antituberculous therapy; the third patient needed surgery for complete cure and the last patient was lost to follow-up.
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Dysphagia in patients with pulmonary tuberculosis may be due to tuberculous esophagitis or compression of the esophagus by enlarged mediastinal lymph nodes or mediastinal fibrosis. We studied the clinical and radiologic findings in nine patients with advanced pulmonary tuberculosis who presented with dysphagia. In each patient, dysphagia first occurred while the patient was on antituberculous therapy. Chest radiographs in each case showed extensive tuberculous disease of the lung, affecting especially the left upper lobe. In addition, dense mediastinal pleural fibrosis was seen along the medial aspects of the upper thorax. Tomograms did not show mediastinal lymph node enlargement. Barium esophagograms showed extrinsic compression and various degrees of narrowing of the supracarinal part of the esophagus. No mucosal abnormality was seen on esophagoscopy. On the basis of these findings, the compression of the esophagus in these patients was attributed solely to tuberculous mediastinal fibrosis. The dysphagia remained constant in all patients except one, in whom worsening dysphagia improved after balloon dilatation. We conclude that mediastinal fibrosis is a significant cause of dysphagia in patients with advanced pulmonary tuberculosis.
A case of endometriosis involving small bowel is reported here. It is the first case reported at our institution in the last 10 years period.
Choledochoduodenal fistula complicating duodenal ulcer disease is a rare occurrence. The present paper describes 3 such cases which were incidentally picked up on upper gastro-intestinal (GI) radiographic study and endoscopy done for ulcer like symptoms. The relevant literature is reviewed.
First described in 1960, esophageal intramural pseudodiverticulosis (EIPD) is a rare disease characterized by narrow-necked diverticuli confined to the esophageal wall. The cause is debatable, but esophageal strictures commonly accompany this entity. The association with EIPD of strictures caused by corrosives has been reported only once to date. We describe three additional examples.