Reduced capillary hydraulic conductivity in skeletal muscle and skin in Type I diabetes: a possible cause for reduced transcapillary fluid absorption during hypovolaemia

Research output: Contribution to journalArticle

Abstract

AIMS/HYPOTHESIS: Patients with Type I (insulin-dependent) diabetes mellitus have a reduced transcapillary fluid absorption from skeletal muscle and skin and thus defective plasma volume regulation during hypovolaemia. Our aim was to find whether a defective capillary filtration coefficient or impaired transcapillary driving force are aetiologic factors for this reduction.

METHODS: We investigated 11 diabetic patients (diabetes duration 6.9 +/- 1.1 years, age 26 +/- 1 years), without complications and 12 control subjects (26 +/- 1 years). Their capillary filtration coefficient was measured in the upper arm using a volumetric technique at rest and during lower body negative pressure (LBNP). We calculated the driving force for transcapillary fluid transfer.

RESULTS: The increase in heart rate and the decrease in systolic blood pressure during lower body negative pressure were similar in diabetic and control subjects. The resting capillary filtration coefficient was decreased in the diabetic subjects, 0.033 +/- 0.003 vs 0.051 +/- 0.007 ml x 100 ml(-1) x min(-1) x mmHg(-1) (p < 0.05). During lower body negative pressure, the capillary filtration coefficient increased 35 % in both groups compared with resting capillary filtration coefficient and was still decreased in diabetes; 0.046 +/- 0.004 compared with 0.069 +/- 0.006 ml x 100ml(-1) x min(-1) x mmHg(-1) (p < 0.01). The established driving force during lower body negative pressure was 1.37 +/- 0.11 vs 1.30 +/- 0.15 mmHg (NS) in diabetic and control subjects, respectively.

CONCLUSIONS/INTERPRETATION: Our study indicates that a reduced capillary filtration coefficient rather than defective regulation of transcapillary driving force, is the reason for the reduced transcapillary fluid absorption during hypovolaemic circulatory stress found in Type I diabetic patients.

Details

Authors
Organisations
External organisations
  • Skåne University Hospital
  • Lund University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Endocrinology and Diabetes

Keywords

  • Adult, Blood Pressure, Capillaries/physiology, Capillary Permeability/physiology, Diabetes Mellitus, Type 1/physiopathology, Electrocardiography, Heart Rate, Humans, Hypovolemia/physiopathology, Male, Muscle, Skeletal/blood supply, Plethysmography, Reference Values, Skin/blood supply
Original languageEnglish
Pages (from-to)1178-1184
JournalDiabetologia
Volume43
Issue number9
Publication statusPublished - 2000 Sep
Publication categoryResearch
Peer-reviewedYes