How should we preclot knitted Dacron grafts?

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Presentation transcript:

How should we preclot knitted Dacron grafts? Steven J. Snooks, M.D., F.R.C.S., Rodney J. Croft, M.Chir., F.R.C.S., Cliff Wagner Journal of Vascular Surgery Volume 7, Issue 4, Pages 538-542 (April 1988) DOI: 10.1016/0741-5214(88)90343-6 Copyright © 1988 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

Fig. 1 Components of graft porosity machine: porosity and flow rate chambers. Journal of Vascular Surgery 1988 7, 538-542DOI: (10.1016/0741-5214(88)90343-6) Copyright © 1988 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

Fig. 2 Porosity chamber. Graft is placed between the two gate clamps at 80 psi. Journal of Vascular Surgery 1988 7, 538-542DOI: (10.1016/0741-5214(88)90343-6) Copyright © 1988 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

Fig. 3 Scattergram shows significant decrease in porosity by the finish (F) of stage 2 for both Vasculour-II and Bionit-II grafts (S = start). Not all the columns have 10 plots because of unsatisfactory recordings obtained at the start and finish of a few porosity testings. Journal of Vascular Surgery 1988 7, 538-542DOI: (10.1016/0741-5214(88)90343-6) Copyright © 1988 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions

Fig. 4 Changes in graft porosity with time for the Vasculour-II and Bionit-II grafts in the first three stages of preclotting (I, II, and III). Arrow denotes the mean coagulation time. Each point represents the mean of 10 water porosity measurements on 10 different samples. The curve is ‘sine’ in shape but after full coagulation it follows a negative exponential function of the form: y = ae−bx. Journal of Vascular Surgery 1988 7, 538-542DOI: (10.1016/0741-5214(88)90343-6) Copyright © 1988 Society for Vascular Surgery and International Society for Cardiovascular Surgery, North American Chapter Terms and Conditions