A method for large-scale, high-yield isolation of canine pancreatic islets of Langerhans

A modified collagenase digestion method is described for the isolation of large numbers of islets from the canine pancreas (approximately 3,500 islets/g). The islets isolated by this technique remained viable and released insulin in response to secretagogues after one week of maintenance in tissue culture. Islets isolated from a single donor pancreas were re-implanted into the spleen of the same animal made diabetic by subtotal pancreatectomy and two injections fo streptozotocin. Hyperglycemia was corrected in two dogs and decreased in a third dog followed for 30 days. The islet isolation method is described, therefore, provides a sufficiently large yield of viable islets from one donor pancreas to correct or improve diabetes in a recipient animal.     

Hyperosmolar hyperglycemic nonketotic syndrome. Report of 22 cases and brief review

In a series of 22 patients with the hyperosmolar hyperglycemic nonketotic syndrome managed during a five-year period in a community hospital setting, 21 patients were known to be diabetic and only six patients were in coma. The overall mortality was 36.3 percent, and seven of the eight deaths were explained by associated nonmetabolic causes. In this study, hyperosmolarity was not related to coma or to final outcome of treatment. Patients were managed with relatively small amounts of fluid, and the type of fluid used did not influence the final outcome.     

Influence of social support on cardiac event rate in men with ischaemic type ST segment depression during ambulatory 24-h long-term ECG recording. The prospective population study 'Men born in 1914', Malm?, Sweden.

Three-hundred and ninety-four 68-year-old men, representing 60.3% of a cohort of men born in 1914, were examined with ambulatory ECG during 24 h in 1982-83. Ninety-eight (24.8%) men had one or more episodes of ischaemic type ST segment depression (greater than or equal to 0.10 mV), 79 of whom had no history of previous ischaemic heart disease (IHD). During 63 months follow-up, 17 of the 98 suffered a cardiac event, i.e. fatal or non-fatal myocardial infarction (MI) or death due to chronic IHD. The objective of this study was to assess the influence of psychosocial factors, such as social network and social support, on cardiac event rate in men with ischaemic ST segment depression. A higher risk was found among men with little material and informational support (i.e. access to practical services and material resources and access to guidance, advice and information (crude relative risk 4.8; 95% CI; 1.6-14.8) and men with low availability of emotional support (i.e. opportunity for care, encouragement of personal value and feelings of confidence and trust) (crude relative risk 4.3; 95% CI: 1.4-13.3). This association was independent of history of IHD and other known risk factors for myocardial infarction (MI).     

经心内和食管快速心房刺激对P波时限及离散度的影响

目的分析快速心房刺激对P波时限及离散度的影响。方法在74例射频消融术经电极导管起搏高位右房及82例经食管心房调搏检查者中,用180次/分的S1S1刺激心房3min,在刺激前后立刻记录12导同步心电图,通过心电图测出刺激前后的最大P波时限(Pmax)、最小P波时限(Pmin)及P波离散度(Pd),然后进行比较。结果:射频消融组Pmax在心房刺激后比刺激前有显著性延长(P<0.01),Pmin及Pd无显著性差异。食管心房调搏组Pmax及Pd在心房刺激后显著性增加(P<0.01),Pmin无显著性差异。结论:快速心房刺激能引起心房传导时间延长,非均质电活动的离散程度增加。     

Non-invasive assessment of left internal mammary-coronary bypass patency using the external Doppler probe.

Non-directional blood velocity of left internal mammary bypass grafts was non-invasively studied with the Doppler ultrasonic probe. Thirteen of 14 subjects had angiographic evidence of bypass graft patency and their Doppler signals demonstrated high amplitude phasic blood velocities. A single patient with proximal left internal mammary arterial graft occlusion manifested marked attenuation of Doppler blood velocity signals. It is concluded that this technic offers a potential for ambulatory and in-office screening of internal mammary artery bypass graft function.