| Pancreatic microcirculation in the monkey with special reference to the blood drainage system of Langerhans islets: light and scanning electron microscopic study. | |
| | |
MedLine Citation:
|
PMID: 8838272 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
The microcirculation of the pancreas in 20 monkeys (Macaca mulatta) was further studied by scanning electron microscopy (SEM) of vascular corrosion casts and light microscopy (LM) of Chinese ink-injected/cleared tissues. The results revealed that 91% of islets observed received arterial blood from the terminal branches of the intralobular arteries--the afferent arterioles, and 9% received no arterial blood, being entirely supplied by the efferent vessels of the intermediate or large islets. Some islets received blood from the translobular afferent arterioles of the adjacent lobule. Two patterns of islet drainage channels with different features in the monkey were demonstrated in our study. These patterns might be termed as continuous or convergent portal vessels. All islets possessed continuous portal vessels, 7-8 microns in diameter, which ran a short distance (approximately 100 microns) and then drained into the peri-islet acinar region, forming a typical continuous insulo-acinar portal system. About 21% of the islets possessed one or two convergent portal vessels, occasionally more. This was first observed in the monkey. These vessels were relatively long and/or thick and drained into different regions: (1) the acinar region far from the islet in the lobule, forming a convergent insulo-acinar portal system, (2) crossed the interlobular septum into an adjacent lobule where sometimes no islet existed and then drained into the exocrine acinar region, forming a translobar convergent insulo-acinar portal system, (3) drained into an adjacent small islet through the insulo-insular drainage vessels--one part of the drainage system of the islets. Translobular vascular anastomoses observed between the microcirculation of pancreatic lobules in the monkey formed a new arrangement of pancreatic microcirculation-translobular pancreatic microcirculation. The functional and clinical significance of the pancreatic portal circulation and translobular circulation is discussed in this report. |
| | |
Authors:
|
Z G Zhou; X H Gao; W U Wayand; L J Xiao; Y Du |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Clinical anatomy (New York, N.Y.) Volume: 9 ISSN: 0897-3806 ISO Abbreviation: Clin Anat Publication Date: 1996 |
Date Detail:
|
Created Date: 1996-12-11 Completed Date: 1996-12-11 Revised Date: 2003-11-14 |
Medline Journal Info:
|
Nlm Unique ID: 8809128 Medline TA: Clin Anat Country: UNITED STATES |
Other Details:
|
Languages: eng Pagination: 1-9 Citation Subset: IM |
Affiliation:
|
Second Department of Surgery, General Hospital of Linz, Austria. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Animals Arterioles / anatomy & histology Corrosion Casting Female Islets of Langerhans / blood supply*, ultrastructure Macaca mulatta Male Microcirculation* Microscopy, Electron Microscopy, Electron, Scanning Models, Biological Pancreas / blood supply*, cytology Reference Values |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Hodgkin's disease: management of first relapse.
Next Document: Functional dominance of the right coronary artery: incidence in the human heart.