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H Johannsson

Publications and source records attributed to H Johannsson.

7 recordsLinked to original sources
PubMed1994

[Surgery for abdominal aortic aneurysm. What is an acceptable complications rate?].

At the annual meeting of the Vascular Section of the Scandinavian Surgical Society in 1993 it was decided to discuss standards for quality in vascular surgery. This article is discussing operations for abdominal aortic aneurysms with special reference to early mortality and complications like graft infection and aortoenteric fistula. The discussion is based on national vascular registers and investigations on vascular surgical activity in the Scandinavian countries. In addition, a survey of the literature is given. Although these data should be regarded as a guide-line only, we feel that one should try to keep the 30 day mortality following elective resection for asymptomatic abdominal aortic aneurysm below 5-7 per cent. A mortality less than 50-60 per cent following operation for ruptured aneurysm may be regarded as reasonable. Patient-selection regarding age, concomitant disease etc. could significantly influence these results, and should be taken into consideration when comparison between different series is made. Graft infection is a serious complication and if the frequency is higher than 2 per cent, or there is an accumulation of graft infections in a vascular centre, the hospital routines should be reviewed carefully. The occurrence of infection is higher following operations for ruptured aneurysms than following elective operations. Early operations for haemorrhage and early occlusion should be below 5-6 per cent. Some authors have shown a correlation between the volume of operation, postoperative mortality and the frequency of complications. We therefore think that it might be reasonable to suggest that at least patients who have concomitant diseases like serious coronary heart disease or renal insufficiency should be operated on in vascular centres.(ABSTRACT TRUNCATED AT 250 WORDS)

Aortic Aneurysm, Abdominal↗
PubMed1991

Cancer of the pancreas in Iceland. An epidemiologic and clinical study, 1974-85.

A retrospective study was performed of all patients diagnosed as having pancreatic cancer in Iceland during the period 1974-85 (12 years). The incidence of the disease during the period according to this study was 10.7 per 100,000 males and 9.8 per 100,000 females, with age-adjusted world standard incidences of 9.0 per 100,000 males and 6.7 per 100,000 females. A total of 301 patients were identified; adequate information could be obtained for 281 patients, and 225 (74.8%) had the diagnosis histologically confirmed. Two hundred and five patients with adenocarcinoma were accepted for detailed analysis. Of the patients with adenocarcinoma 139 (67.8%) were diagnosed at laparotomy, and 33 of them had the tumour resected, with an operative mortality of 12.1%. The cancer was located in the head of the pancreas in 102 patients (49.8%), and in 159 (77.6%) metastases were found at the time of diagnosis. The median survival time for the patients with adenocarcinoma was 95.4 days (SD +/- 11.1 days), although there were two patients in this group who were alive 5 years after diagnosis. The median survival for the total group of 281 patients was 98.3 days (SD +/- 11.0 days), although 6 of these patients lived for more than 5 years. The percentage of histologically confirmed tumours in Iceland is high compared with many previously reported studies.

Adenocarcinoma↗
PubMed1975

Effects of different gas flow patterns on central circulation during respirator treatment.

The effects of different inspiratory gas flow patterns on the central circulation during respirator treatment were investigated, first with a retrospective study consisting of 15 patients, where the effects on the mean intrathoracic pressure were represented by the variations in the amplitude and time development of the oesophageal pressure curve. In another study on eight intensive care patients undergoing respirator treatment, right-sided heart catheterisation was performed with pressure recordings in the central venous position, the right ventricle, the pulmonary artery and in the pulmonary capillary venous position. Estimations of the arterial-mixed venous oxygen content difference were also made. The development and transmission of the airway pressure curve to the central circulation were illustrated and discussed. The results showed very small effects on the mean intrathoracic pressure from different inspiratory gas flow patterns, and, therefore, it could be expected that the effects on the central circulation would be insignificant. This was also the conclusion in the catheterisation study. No important changes in the pressures of the a-vo2 difference occured. Most of the characteristics of a particular gas flow pattern are lost during the passage through the airways and are not transmitted to the oesophagus or the central vessels.

Aged↗