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Visceral tissue vascularization: an adaptive response to high temperature
Science (New York, N.Y.)
|December 1, 1967
Summary
Sheep abdominal tissue developed a vascularized envelope around implanted electrical heat sources. This adaptive vascularization helped regulate heat, reducing surface temperatures and mitigating potential cell damage from sustained heat exposure.
Area of Science:
- Biomedical Engineering
- Tissue Engineering
- Physiology
Background:
- Implantable electrical heat sources require understanding tissue response.
- Sustained temperatures near 45°C can be detrimental to cellular structures.
- Tissue encapsulation is a common biological response to foreign objects.
Purpose of the Study:
- To investigate the adaptive response of vascularized connective tissue to implanted heat sources.
- To quantify the temperature regulation capacity of the developing tissue envelope.
- To determine if vascularization is influenced by proximity to a potentially damaging temperature.
Main Methods:
- Implanted electrical heat sources in sheep abdominal cavities, set at 42°C and 45°C.
- Monitored heater surface temperatures over 18 days of constant heating.
- Histologically assessed the vascularization of the encapsulating connective tissue envelope.
Main Results:
- A vascularized connective-tissue envelope formed around all heat sources.
- Heater surface temperatures decreased by 0.8°C (42°C group) and 1.8°C (45°C group) over 18 days.
- Greater vascularization and temperature decrease correlated with initial proximity to 45°C.
Conclusions:
- The formation of a vascularized tissue envelope is an adaptive response to implanted heat sources.
- This adaptive vascularization appears to play a role in regulating local temperature.
- The tissue's response suggests a mechanism to mitigate thermal injury, even at temperatures near 45°C.