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Biomedical subjects

T Havia

Publications and source records attributed to T Havia.

At least 19 recordsLinked to original sources
PubMed1992

Selective endothelial binding of interleukin-2-dependent human T-cell lines derived from different tissues.

The ability of lymphocytes to recognize and bind to high endothelial venules (HEVs) is essential for lymphocyte migration from the blood into lymphoid tissues and into sites of inflammation. Endothelial cell binding capacity also critically determines the clinical usefulness of T-cell lines and clones in immunotherapy. In the present study, interleukin-2-dependent T-cell lines were derived from the blood, lamina propria of the gut, inflamed synovium, synovial fluid, and peripheral lymph nodes. After 3-8 weeks of culture, the expression of homing-associated molecules and binding to mucosal, synovial, and peripheral lymph node HEVs were analyzed. Cell lines derived from the blood and mucosal sites bound significantly better to mucosal and synovial HEVs than to peripheral lymph node HEVs. Three out of seven synovial T-cell lines showed preferential binding to synovial HEVs, whereas the rest bound almost equally well to synovial and mucosal HEVs. T-cell lines from peripheral lymph nodes bound preferentially to lymph node HEVs despite the lack of L-selectin (the peripheral lymph node homing receptor). Expression of the known homing-associated molecules did not predict the HEV-binding specificity of these lines. Importantly, two cell lines bound well to synovial venules, but poorly, if at all, to mucosal or peripheral lymph node HEVs, supporting the concept that synovial-specific HEV recognition mechanisms exist. In conclusion, the tissue origin of T-cell lines critically determines their selectivity for endothelial cell recognition, and besides the known "homing receptors," other molecules may also mediate tissue-specific HEV-binding of interleukin-2-activated T cells.

Antigens, CD↗
PubMed1992

Colonic anastomosis using the biofragmentable anastomotic ring and manual suture: a prospective, randomized study.

One hundred and fifty consecutive patients undergoing colonic surgery were randomized into two groups: 71 underwent hand-suture with a two-layer anastomosis of resorbable suture material (3/0 Dexon) and 79 were fitted with the biofragmentable anastomotic ring (Valtrac-BAR). Five patients, two treated using the BAR and three by suturing, developed anastomotic leakage which required a Hartmann-type reoperation. This was successful in four; one patient in the suture group died after reoperation. One patient who underwent suture had an early anastomotic stricture with fatal sequelae. Three other patients (one in the BAR group and two in the suture group) died after operation from other causes. Thus the mortality rate was 6 per cent in the suture group and 1 per cent in the BAR group. During follow-up, one patient in each group underwent reoperation for anastomotic stricture. Recovery of the gastrointestinal tract was similar in the two groups regarding duration of nasogastric drainage, intravenous fluid therapy and ileus. There was no difference between the groups in duration of hospital stay. The BAR seems to be a safe and reliable alternative to conventional suture anastomosis in colonic surgery.

Aged↗
PubMed1992

Gastrointestinal viscerosynthesis with biofragmentable anastomosis ring.

The biofragmentable anastomosis ring (BAR) has been in clinical use since 1987. It yields a standardized intestinal viscerosynthesis leaving no foreign body in the tissues. Several multicentre and single studies have shown its safety and efficacy in elective colonic surgery. Our studies have shown it to be safe and reliable also in small bowel surgery and bilio-digestive anastomosis. Our long-term results in colonic surgery are very promising. A review of anastomosis technique and current literature is given.

Anastomosis, Surgical↗
PubMed1992

Laparoscopic cholecystectomy. Experience of the first 150 patients.

Between April 1991 and May 1992, 150 patients were treated by laparoscopic cholecystectomy. Eleven patients (7.3%) required conversion to open laparotomy and five (3.3%) patients were operated on for postoperative complications. There were two (1.3%) patients with a hepatic duct lesion, one of which was treated with a T-tube alone but the other required a bilioenteral reconstruction. The average operation time was 72 minutes (range 30-240 minutes). The mean hospital stay of all patients was 2.1 days (range 1-28 days) and the mean time to return to work was 11.5 days (range 6-60 days).

Adolescent↗
PubMed1992

Cholecystoenteral anastomosis with the biofragmentable ring and manual suture--a prospective, randomized study.

20 patients treated by cholecystojejunostomy for obstructive icterus were randomized to be treated either with a biofragmentable intraluminal ring (Valtrac) (10 patients) or suture of the cholecystointestinal anastomosis (10 patients). Postoperatively one patient in each group died of advanced malignancy. There were no surgical complications in either group. The relief of icterus, recovery of the gastrointestinal tract and the mean hospital stay were similar in both groups. The biofragmentable anastomosis ring (BAR) is a safe method for cholecystoenteral anastomoses.

Adult↗
PubMed1991

Diagnostic factors for postoperative candidosis in abdominal surgery.

Abdominal surgery patients with postoperative septicaemia and a deep septic focus were analyzed in an attempt to identify characteristics typical of postoperative candidosis. There were 36 patients, 10 with candidosis and 26 with bacterial septicaemia. Typical for candidosis when the septic signs appeared was a history of prolonged antibiotic treatment before the operation (10/10), long courses of antibiotics (7/10), and therapy with combinations containing aminoglycoside (7/10). Operations on the small intestine were characteristic of candidosis patients (4/10). A poor clinical condition (9/10) on admission to the hospital, late onset of septicaemic symptoms postoperatively (7/10), long hospitalization (9/10), parenteral nutrition (10/10) and reoperations (9/10) were also features associated with the development of candidosis. Patients with postoperative candidosis have several characteristics on the basis of which the developing serious infection can be suspected and empirical therapy started. It may be appropriate to initiate antifungal prophylaxis in connection with operations when necrotic intestine is resected. Avoiding long courses of postoperative antibiotics could also be a measure to diminish the incidence of postoperative candidosis.

Abscess↗
PubMed1991

Surgery of acute peptic ulcer haemorrhage.

During the years 1973-1985, 145 patients with acute peptic ulcer haemorrhage were treated surgically at the Department of Surgery, Turku University Central Hospital. The bleeding site was gastric ulcer in 76 patients; 58 of these were treated by gastric resection and 17 by ulcer excision combined with vagotomy and pyloroplasty. Forty-two out of 69 patients with bleeding duodenal ulcer were treated with partial gastrectomy, the remaining with transfixion and vagotomy and pyloroplasty. The rebleeding rate was 2% and reoperation rate 9% among the patients who had a resection. In contrast 19% of the transfixed and 12% of ulcer excision cases rebled. The primary overall mortality was 12%; 44% of the patients with recurrent bleeding died. Because rebleeding was the most important cause of mortality, partial gastrectomy in bleeding gastric as well as duodenal ulcer may be preferable.

Acute Disease↗
PubMed1990

Roux-en-Y reconstruction for severe postoperative duodenogastric reflux disease.

Thirty-two patients underwent Roux-en-Y diversion because of symptomatic postoperative duodenogastric reflux. Operative mortality was nil, but eight patients had transiently delayed gastric emptying postoperatively. At follow-up 45 months (range 9-89 months) after the Roux-en-Y operation 28 (88%) patients were in good clinical state; four patients were classified as poor. The main cause for a poor clinical outcome was a stomal ulcer in three patients. Atrophic gastritis was seen in the operative specimens of 22 patients. Severity of gastritis evaluated by gastroscopic biopsies at follow-up was less marked in 16 patients as compared to the histology of the samples from the original operation (P less than 0.001). Intestinal metaplasia had regressed in nine cases and proceeded in three cases (NS). Severe postoperative duodenogastric reflux can be treated by the Roux-en-Y reconstruction with good subjective relief of symptoms and beneficial histologic changes in the gastric stump mucosa.

Adult↗
PubMed1988

Surgical treatment of high bleeding gastric ulcer.

In the surgical treatment of 68 consecutive patients with benign, high, bleeding gastric ulcer between 1966 and 1981, the following operative procedures were used; high gastric resection in 31 (45.5%) cases, local ulcer excision with truncal vagotomy and pyloroplasty in 23 (33.8%), local ulcer excision with low gastric resection in 11 (16.2%) and a local procedure alone in three (4.5%) cases. Of these 68 operations, 40 (59%) were early elective operations and 28 (31%) acute or emergency operations. Altogether, six (8.9%) patients died postoperatively, all but one after acute or emergency operation. High gastric resection was the most risky operation and five of the six deaths were in this operative group. Nonfatal complications developed in 18 (26.4%) cases but without correlation to the timing or to the type of operation. Early rebleeding during the hospital stay necessitating reoperation occurred in three (4.4%) patients, two of these among the three cases operated on using a local procedure and without a definitive operation. During the follow-up five (7.3%) recurrent ulcers developed, four after local ulcer excision with truncal vagotomy and pyloroplasty and one after high gastric resection. It seems to us that in the treatment of patients with high gastric ulcer, local operation alone is never acceptable. High gastric resection is often technically hazardous with a high postoperative mortality rate. The best methods seemed to be local ulcer excision combinated with truncal vagotomy and pyloroplasty or, perhaps preferably, with low gastric resection.

Adult↗
PubMed1987

Yersiniosis as a gastrointestinal disease.

Anti-yersinia antibodies were assessed in sera from 630 patients admitted to a department of surgery for acute abdominal disease, using an enzyme-linked immunosorbent assay (ELISA). In 21 patients a high concentration of yersinia antibodies confirmed recent yersinia infection. Eight patients had an appendicectomy performed; in all patients with antibodies against Y. enterocolitica 9 or Y. pseudotuberculosis IA a true appendicitis was found at operation. Two patients with Y. enterocolitica 3 antibodies had acute terminal ileitis and mesenterial lymphadenitis. In 4 patients a diagnosis of acute pancreatitis was established; 2 of these had cholecystitis. Two further patients had cholecystitis without pancreatic affection. Two patients had colonic diverticulitis, 1 with perforation. The results demonstrate that yersinia infection may commonly give rise to a variety of acute abdominal inflammations, and stress the importance of serological and bacteriological diagnostic procedures.

Acute Disease↗
PubMed1987

Vagotomy and gastroenterostomy for stenosing duodenal ulcer.

Vagotomy and gastroenterostomy (V-GE) was performed in 41 patients with chronic stenosing duodenal ulcer and gastric retention in the years 1965-84. There was no mortality and no severe complication occurred. One patient was reoperated for dysfunction of an antecolic stoma. After a follow-up of 1-16 (mean 8) years 30 patients were interviewed and gastroscopy was performed in 21. One recurrence of ulcer was found at endoscopy. Visick classification gave the following overall results: grade I 40%, grade II 13%, grade III 30% and grade IV 17%. One case of gastric carcinoma was found five years after operation. It was concluded that V-GE is a simple and safe method and will give satisfactory early and long-term results.

Adult↗
PubMed1987

Factors contributing to subphrenic abscess.

Between 1969 and 1982 11 primary (without previous surgery) and 38 secondary (postoperative) subphrenic abscesses were treated out of total 20800 operations. The patients had on an average more than 4 risk factors. Causes contributing to the formation of secondary abscesses were a difficult operation in 42%, deficiencies in surgical technique in 26%, operative contamination in 21% and peritonitis in 13% of the cases. Clear problems in the primary operation were found in 23 of 38 patients and in 6 of 7 patients who died with a later secondary abscess. It seems probable that subphrenic abscesses are more likely to develop in high risk patients after a difficult and/or contaminated operation.

Adult↗
PubMed1979

Elevated mid-myocardial oxygen tension in the fibrillating heart during cardiopulmonary bypass.

Mid-myocardial tissue oxygen tension was measured in the left ventricular wall of the hearts of ten dogs by means of a Silastic tonometer implanted earlier. During cardiopulmonary bypass, myocardial PO2 was significantly higher in a spontaneously fibrillating heart (5.4 +/- 0.9 kPa) than during the initial beating period (3.7 +/- 0.5 kPa) or after defibrillation (4.0 +/- 0.7 kPa). In general, there was a tendency towards increased myocardial blood flow, elevated oxygen uptake and reduced coronary sinus oxygen content during ventricular fibrillation, compared with the situation in the beating heart. Myocardial lactate extraction remained unchanged during the different phases of cardiopulmonary bypass. The increase in mid-myocardial oxygen tension during ventricular fibrillation was probably due to increased total myocardial blood flow and redistribution of regional myocardial circulation. In two additional dogs, ventricular fibrillation resulted in left ventricular distension and a simultaneous fall of myocardial oxygen tension, which indicates the necessity of left ventricular decompression suction in a fibrillating heart during cardiopulmonary bypass.

Animals↗
PubMed1978

The re-use of previously implanted pacemakers.

Two methods were used to sterilize pacemakers recovered for reimplantation in other patients. In a series of 50 reimplantations there was no battery or pocket complication which could be attributed to these methods. We believe that reimplantation is justified especially as the economic factors will become much more important with the new long-lasting, hermetically sealed lithium pacemakers.

Aged↗
PubMed1977

Surgical treatment of aneurysms of the ascending aorta. With special reference to cystic medial necrosis of the aorta.

The clinical series comprised 14 patients with aneurysms of the ascending aorta. In the autopsy series, there were additionally 19 patients, who had died suddenly as a results of free perforation or dissection of the ascending aorta. In the clinical series, the cause of the aneurysmal formation was cystic medial necrosis in 10 patients, 8 of whom had severe aortic valve insufficiency. Twelve patients were operated on using extracorporeal circulation, Both the ascending aorta and aortic valve were replaced with prosthesis in 6 cases. Three patients underwent emergency surgery due to pericardial tamponade. All three died, despite a technically successful operation. One patient out of 9 electively operated upon died. A follow-up examination was carried out on the 5 surviving cystic medial necrosis patients. Aneurysms of the sinuses of Valsalva developed after supracoronary resection in 2 patients. The results showed that elective operations in the event of aneurysms of the ascending aorta can be carried out with an acceptably low mortality rate. However, after supracoronary resection, in cases of cystic medial necrosis, the risk of developing aneurysms of the proximal aortic remnant seems obvious. Therefore, in patients in whom the whole aortic root is involved, total removal of the ascending aorta and re-implantation of the coronary ostia into the prosthetic tube is preferable.

Adolescent↗
PubMed1977

Intramyocardial gas tensions in the canine heart.

Intramyocardial gas tensions were determined in the left ventricular wall of the canine heart by means of chronically implanted silastic tonometers. In the central zone of the myocardial wall the mean baseline PO2 was 22 mmHg and the mean baseline PCO2 28 mmHg. Breathing of pure oxygen elevated the myocardial PO2 to a level of 60 to 90 mmHg. Hypovolaemic shock induced by shedding 30% of the blood volume resulted in a sharp decrease of the myocardial PO2 and a marked increase of the myocardial PCO2. During hypovolaemia, ventilation with pure oxygen elevated the oxygen tension to the control level and, after re-infusion of the shed blood, the response of the myocardial PO2 to oxygen breathing became higher than normal. Correction of hypovolaemic with a plasma expander Haemaccel restored the myocardial oxygen tension to the baseline level. Ligation of the left anteior descending coronary artery produced a rapid fall of PO2 and a profound increase of PCO2 in the corresponding myocardial area. After coronary ligation, developing tissue ischaemia usually resulted in ventricular fibrillation within a few minutes. Cardiac massage was started immediately, but produced no correction of tissue gas tensions, although the arterial blood gases remained normal. Ligation of the right coronary artery or the left circumflex coronary artery for short periods increased the myocardial PO2 in the vicinity of the left anterior descending branch, probably due to reactive hyperaemia around the ischaemic tissue.

Animals↗