[Production and clinical application of fibrin sealant with high concentrated fibrin (fibrin patch)].
OBJECTIVE
The sealing properties of fibrin sealant with high concentrated fibrin (fibrin patch) were examined.


METHODS
A commercial fibrin sealant (Bolheal) produced from pooled human plasma was utilized for this study. The fibrin sealant made of fibrinogen and thrombin solutions mixed in a volume ratio 5:1 was applied as the fibrin sealant with high concentrated fibrin (fibrin patch). The burst pressure of the fibrin clots of either 1:1 or 5:1 mixing ratio, which sealed the small holes, was measured by a water-leak preventing model. The tensile strength of the fibrin patch was measured by the breaking pressure of the fibrin clot. The burst pressure of the fibrin patch, which sealed the dural defect with a diameter of 15 mm, was compared with that of expanded polytetrafluoroethylene (ePTFE).


RESULTS
The burst pressure was elevated from 287 +/- 23.1 to 445 +/- 30.5 mmHg by changing the mixing ratio from 1:1 to 5:1. The breaking pressure of the fibrin patch showed 131 +/- 25.4 mmHg and that of the patch mixed at the ratio of 1:1 showed 46.6 +/- 9.9 mmHg. The result of dural repair with the fibrin patch revealed higher sealing effectiveness than that of ePTFE. The burst pressure averaged 70.5 +/- 21.4 mmHg in the fibrin patch samples and 51.4 +/- 13 mmHg in the ePTFE samples.


CONCLUSIONS
The fibrin patch revealed higher performance as a sealant and has the potential to be a candidate for acceptance as the new dural repair material.
Terasaka
S
S
Department of Neurosurgery, Hokkaido University, Nishi 7 chome, Kita 15 jo, Kita-ku, Sapporo 060-8638, Japan.
Asaoka
K
K
Sawamura
Y
Y
Uchida
T
T
D001921:Brain / Q000601:surgery; D005069:Evaluation Studies as Topic; D005337:Fibrin / Q000737:chemistry; D015718:Fibrin Tissue Adhesive / Q000592:standards*; D006801:Humans; D011138:Polytetrafluoroethylene / Q000592:standards*; D013718:Tensile Strength
D015718:Fibrin Tissue Adhesive; D005337:Fibrin; D011138:Polytetrafluoroethylene