Adaptation to loss: occupational therapy as a way of life.
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Adaptation, Physiological↗
Biomedical subjects
S H Carr
Publications and source records attributed to S H Carr.
State guidelines for school-based occupational therapy: 1989 survey.
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Child↗
Interactions between segmented polyurethane surfaces and the plasma protein fibrinogen.
Surfaces of a segmented polyurethane were varied by casting on poly(ethylene terephthalate) (PET) and glass substrates, and were characterized through infrared-attenuated total-reflection spectroscopy (ATR). Surfaces cast on glass substrates showed a higher content of polyether segments, whereas those cast on PET contained a higher relative concentration of aromatic segments. Adsorption, and possible conformational changes of fibrinogen, were found to be more substantial on polymer surfaces having a higher content of polyether segments. It is concluded that the relatively good blood compatibility of segmented polyurethanes is partly due to the presence of peptide-like bonds on aromatic segments.
Adsorption↗
Poly(glycolic acid) sutures in canine vascular anastomoses.
Poly(glycolic acid) (Dexon; Davis and Geck Company) canine vascular anastomoses between aorta and synthetic grafts and between severed femoral vessels were compared with comparable anastomoses made with Teflon-coated Dacron (Tevdek; The Deknatel Company) with respect to clinical performance, morphologic characteristics, and tensile strength. While the Dexon anastomoses performed well and were morphologically superior to Tevdek, their tensile strength was significantly lower. Implications of these findings for vascular wound healing are discussed.
Animals↗
In vitro testing of surface thrombogenicity using the thrombelastograph.
Synthetic surfaces can be assessed for their ability to promote or inhibit whole blood coagulation with improved accuracy using a new protocol developed for the Thrombelastograph instrument. Results obtained from the analysis of the hydrodynamic state of blood clotting in Thrombelastograph chambers have enabled a quantitative interpretation of the output of this instrument to be made. The thrombogenic properties of a segmented polyurethane and a polydimethyl siloxane are compared with a preparation of reconstituted elastin. It is seen that a four-fold delay in clotting time is exhibited by reconstituted elastin when it is compared with other biomedical synthetic materials tested.
Adult↗