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The Function of ‘Choke Vessels’ to the Blood Flow: Angiographic and Laser Flow‐Graphic Study on the Rat Flap Model
Author(s) -
Toshiharu Minabe,
Katsumata S.,
Ogo K.,
Taylor G. I.
Publication year - 2004
Publication title -
wound repair and regeneration
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.847
H-Index - 109
eISSN - 1524-475X
pISSN - 1067-1927
DOI - 10.1111/j.1067-1927.2004.abstractbc.x
Subject(s) - choke , medicine , blood flow , anatomy , angiography , surgery , cardiology , physics , quantum mechanics
Aim: The ‘choke vessels’, defined by Taylor 1], are reduced‐caliber anastomosing vessels which are normally the barrier in the vasculature. They also have capacity to dilate and increase the blood flow. The aim of this study is to investigate the anatomical and dynamic function of choke vessels. Study design: The 3‐territory bipedicled flaps were elevated on the back of the Wistar rats 2]. The flaps were directly sutured back in place in the revascularized group (10 animals), and the plastic sheets were underlaid in the non‐revascularized group (10 animals). On the day 3, each flap was converted to the mono‐pedicled flap and was scanned by the laser flow‐graphy and injected for the angiography. Results: All flaps survived completely. The revascularized flaps showed evenly dilated choke vessels in the 2 choke zones of the flaps and the blood flow from the vascular pedicle covered more than 2 territories. The non‐revascularized flaps showed more remarkable but uneven dilatation of choke vessels between 2 choke zones. The blood flow in non‐revascularized flaps, however, reached only 1 territory, blocked by the first choke zone which dilated less than the other zone. Conclusions: By dilating, the choke vessels are activated and can have the adverse function of regulating the blood flow, namely, suppression and escalation of the blood flow.