Process of making flowable hemostatic compositions and devices containing such compositions
a technology of compositions and hemostatic compositions, which is applied in the direction of aerosol delivery, bandages, other domestic articles, etc., can solve the problems of compromising the sterility of the delivered product, the need to mix powder and liquid, and time-consuming manipulations
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example 1
[0060] A total of ten samples were prepared as follows. One gram of dry Surgifoam® powder was placed in a plastic container and mixed with 4 ml of saline. The container was capped and the contents were shaken until a substantially homogenous paste of uniform consistency was obtained. The paste was formed into a cylindrical shape and placed into a 10 cc BD polypropylene disposable luer syringe. The syringes were then capped and five of the filled syringes were sterilized by gamma irradiation at a dose of 25 kGy. The Peak Expression Force was determined and presented in Table 1. Unsterilized samples are designated as 1a and sterilized samples are designated as 1b.
[0061] At total of 10 samples were prepared as follows. 1 gm of dry Surgifoam® powder was placed in a plastic container and mixed with 4 ml of saline. The container was capped and the contents were shaken until a substantially homogenous paste of uniform consistency was obtained. The paste was formed into a cylindrical shape...
example 2
[0062] A total of ten samples were prepared as follows. A saline solution containing 0.005% by weight of benzalkonium chloride and 5% weight of glycerol was prepared. This solution was used to prepare homogenous gelatin-powder pastes as described in Example 1. The paste was formed into a cylindrical shape and placed into a 10 cc BD polypropylene disposable luer syringe. The syringes were then capped and five of the filled syringes were sterilized by irradiation at a dose of 25kGy. The Peak Expression Force was determined and presented in Table 1. Unsterilized samples are designated as 2a and sterilized samples are designated as 2b.
[0063] A total of ten samples were prepared as follows. A saline solution containing 0.005% by weight of benzalkonium chloride and 5% by weight of glycerol was prepared. This solution was used to prepare homogenous gelatin-powder pastes as described in Example 1. A second 10 cc BD luer syringe containing 3 ml of nitrogen then was connected to the syringe ...
example 3
[0065] 25 grams of Surgifoam® gelatin powder were mixed with 125 ml of normal saline containing 0.005% benzalkonium chloride and 5% glycerol, based on weight of saline, until a uniform paste was formed. The resulting paste was loaded into a ½ pint Donvier mixer fitted with a mixing paddle. A tube connected to a nitrogen source was fitted through the lid of the mixer and the system “closed” to the environment by wrapping in a film. The system was purged with nitrogen for 20 minutes. The paste was then mixed to homogenously incorporate the nitrogen by rotating the paddle rapidly by hand. Mixing was terminated when the composition filled the available volume, indicating homogeneous distribution of the gas phase. The composition was loaded into a 60 cc syringe and subsequently dispensed into 10 cc BD luer syringes via a two-way luer connector. The density of the composition was approximately 0.7-0.75 grams / ml. The syringes were then capped and some of the filled syringes were sterilized...
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