US2558395A - Undenatured gelatin hemostatic sponge containing thrombin - Google Patents

Undenatured gelatin hemostatic sponge containing thrombin Download PDF

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Publication number
US2558395A
US2558395A US17366A US1736648A US2558395A US 2558395 A US2558395 A US 2558395A US 17366 A US17366 A US 17366A US 1736648 A US1736648 A US 1736648A US 2558395 A US2558395 A US 2558395A
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Prior art keywords
thrombin
gelatin
undenatured
hemostatic sponge
solution
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US17366A
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Andre Studer
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F Hoffmann La Roche AG
Hoffmann La Roche Inc
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F Hoffmann La Roche AG
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
    • A61L15/32—Proteins, polypeptides; Degradation products or derivatives thereof, e.g. albumin, collagen, fibrin, gelatin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/425—Porous materials, e.g. foams or sponges
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/64—Use of materials characterised by their function or physical properties specially adapted to be resorbable inside the body
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/28—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2400/00—Materials characterised by their function or physical properties
    • A61L2400/04—Materials for stopping bleeding
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2389/00—Characterised by the use of proteins; Derivatives thereof

Definitions

  • the present invention relates to a process for the manufacture of hemostatic tampons and bandages.
  • hemostatic tampon and bandages may be prepared from undenatured water soluble gelatin by adding thrombin to an aqueous gelatin solution, transforming the solution obtained into foam and drying the foam obtained in vacuo at a low temperature.
  • the form of the thrombonic gelatin sponge may be adapted to the requirements of the intended use.
  • the present process yields hemostatic tampons and bandages consisting of an easily soluble mass of gelatin and thrombin and which is of a cotton-wool like appearance. These tampons and bandages need not be dipped into a thrombin solution but may be placed on any wound without prior treatment.
  • the new tampons and bandages quickly cause hemostasis; the blood flowing from the Wound is absorbed into the sponge, thereby dissolving the gelatin component; the thrombin which is thus released immediately causes the transformation of fibrinogen into fibrin. A fibrin film is thus formed over the wound, whereby the latter is closed and the flow of the blood is stopped. The film clings tightly to the surface of the wound, in many cases rendering the use of bandages or like means of protection unneces-
  • the efiiciency of the tampons manufactured in accordance with the present invention may be demonstrated in vitro by the following experiment: .In a test tube (about 1 cm. internal diameterl a few tampons are loosely stamped to form a column about 5 cm. high. 5 com. of plasma of 37 C. are poured thereon. The plasma issucked into the sponge-like material and coagulates so quickly that the test tube may be turned upside down directly after filling in the plasma without any of the latter running out.
  • antiseptic agents may be added to the gelatin-thrombin product without influencing the activity of the tampons and bandages.
  • Thymol a mixture of p-hydroxybenzoic-acidmethyl and propylester, or sulfamides, such as 5-sulfanilamido-3,l-dimethyl-isoxazole, are :antiseptics which may be so used.
  • the addition of substances accelerating cicatrization, such as panthenol, may also be found to be useful.
  • Panthenol is the generic name for 'y-dihydroxy- 3,5 dimethyl butyric acid (3' hydroxypropyl) -amide.
  • the gelatin has a protective and stabilizing effect on the thrombin with which it is impregnated. It has been found, for instance, that the activity of an aqueous thrombin solution containing 5 per cent. gelatin falls away more slowly than in the case of such a solution containing no gelatin.
  • Th. U. stands for thrombin units (1 llh. U. being the amount of thrombin which causes 1 ccm. of plasma of bovine to coagulate within 30 seconds at a temperature of 37 0.
  • thrombin preparation showing on titration a content of 100 Th. U./mg.
  • the slightly turbid solution is passed through, a filter which retains bacteria.
  • the clear solution is transformed into a voluminous foam by blowing in sterile air through a" glass plate.
  • the froth is spread out over a sheet, frozen and dehydrated in high vacuo at low temperature.
  • Example 2 70 mg. of thymol are dissolved in 100 com. warm distilled water. grams of gelatin are added to the solution and the mixture is heated to 80 C. Further working as describedin Example 1.
  • Example 3 20 mg. of p-hydroxybenzoylmethylester and 80 4 freeze-dried foam of an aqueous solution containing undenatured water-soluble gelatin and thrombin.
  • a preformed hemostatic sponge made by drying, at low temperature and under reduced pressure, a foam of an aqueous solution containing undenatured water-soluble gelatin and thrombin.
  • Example 4 5 grams of gelatin in 90 com. distilled water are heated to 80 C. 2 grams of finely pulverised5- sulfanilamido-3,4-dimethylisoxazole are suspended in the warm solution. The solution is set to a pH of 6.6 by adding 5 to 10 com. of normal sodium hydroxide. The sulfanilamide then dissolves. The mixture is heated to 80 C. and Worked further in accordance with Example 1.
  • Example 5 0.2 gram of panthenol is dissolved in 100 com. of distilled water. 5 grams of gelatin are added. The mixture is heated to 80 C. and worked further in accordance with Example 1.
  • a preformed hemostatic sponge made by freezing a foam of an aqueous solution containing undenatured water-soluble gelatin and thrombin, and drying the frozen foam in vacuo at a low temperatur r ANDRE STUDER.

Description

Patented June 26, 1951 TUNITED' STATES PATENT OFFICE Andr Studerl...B.a seL Switzerland, assignor to Hoiimann-La Roche Inc., Nutley, N. J acorporation of New Jersey No Drawing. Application March 26, 1948, Serial No. 17,366: In SWitzerlandJune 3, 194.7
The present invention relates to a process for the manufacture of hemostatic tampons and bandages.
In surgery hemostatic tampons and bandages consisting of fibrinand"cellulose-derivative sponges which contain a, thrombin solution are used. These tampons and bandages are prepared for use by dipping them into a thrombin solution immediately priorto application. This mode of use requires the sponges to consist of a material insoluble in water, because otherwise they would collapse during the contact with the aqueous thrombin solution. 'Such sponges have the disadvantage of being resorbed much more slowly by the organism than water soluble sub stances. r
In order to avoid this disadvantage a soluble gelatine gel has been used in place of the said sponges. This gel is immersed in a thrombin solution immediately prior to application. However, it is difiicult and takes a considerable amount of time to obtain the complete impregnation of such gels by the thrombin solution. Furthermore, such impregnated tampons cannot be stored because the thrombin is unstable in the presence of water and its activity quickly diminishes. Again it has been found that thrombin brings about a diminution of the jellifying quality of the gelatin.
It has now been found, according to the present invention, that hemostatic tampon and bandages may be prepared from undenatured water soluble gelatin by adding thrombin to an aqueous gelatin solution, transforming the solution obtained into foam and drying the foam obtained in vacuo at a low temperature. The form of the thrombonic gelatin sponge may be adapted to the requirements of the intended use. The present process yields hemostatic tampons and bandages consisting of an easily soluble mass of gelatin and thrombin and which is of a cotton-wool like appearance. These tampons and bandages need not be dipped into a thrombin solution but may be placed on any wound without prior treatment. The new tampons and bandages quickly cause hemostasis; the blood flowing from the Wound is absorbed into the sponge, thereby dissolving the gelatin component; the thrombin which is thus released immediately causes the transformation of fibrinogen into fibrin. A fibrin film is thus formed over the wound, whereby the latter is closed and the flow of the blood is stopped. The film clings tightly to the surface of the wound, in many cases rendering the use of bandages or like means of protection unneces- The efiiciency of the tampons manufactured in accordance with the present invention may be demonstrated in vitro by the following experiment: .In a test tube (about 1 cm. internal diameterl a few tampons are loosely stamped to form a column about 5 cm. high. 5 com. of plasma of 37 C. are poured thereon. The plasma issucked into the sponge-like material and coagulates so quickly that the test tube may be turned upside down directly after filling in the plasma without any of the latter running out.
If so desired antiseptic agents may be added to the gelatin-thrombin product without influencing the activity of the tampons and bandages. Thymol, a mixture of p-hydroxybenzoic-acidmethyl and propylester, or sulfamides, such as 5-sulfanilamido-3,l-dimethyl-isoxazole, are :antiseptics which may be so used. The addition of substances accelerating cicatrization, such as panthenol, may also be found to be useful. Panthenol is the generic name for 'y-dihydroxy- 3,5 dimethyl butyric acid (3' hydroxypropyl) -amide.
The gelatin has a protective and stabilizing effect on the thrombin with which it is impregnated. It has been found, for instance, that the activity of an aqueous thrombin solution containing 5 per cent. gelatin falls away more slowly than in the case of such a solution containing no gelatin. The following table in which Th. U. stands for thrombin units (1 llh. U. being the amount of thrombin which causes 1 ccm. of plasma of bovine to coagulate within 30 seconds at a temperature of 37 0.), illustrates this fact:
5 grams of gelatin in sheets are added to 100 com. of distilled water. The mixture is heated to C. and filtered while still warm through a filter which retains bacteria. The filtrate is adjusted to a pH of 6.6. 10 com. of a thrombin solution containing 10,000 units per com. (vide supra) are added to 50 com. of the filtrate which ha been cooled down to a temperature of 20 C. (This thrombin solution may be prepared from a,
thrombin preparation showing on titration a content of 100 Th. U./mg.) The slightly turbid solution is passed through, a filter which retains bacteria. The clear solution is transformed into a voluminous foam by blowing in sterile air through a" glass plate. The froth is spread out over a sheet, frozen and dehydrated in high vacuo at low temperature.'
Example 2 70 mg. of thymol are dissolved in 100 com. warm distilled water. grams of gelatin are added to the solution and the mixture is heated to 80 C. Further working as describedin Example 1.
Example 3 20 mg. of p-hydroxybenzoylmethylester and 80 4 freeze-dried foam of an aqueous solution containing undenatured water-soluble gelatin and thrombin.
2. A preformed hemostatic sponge made by drying, at low temperature and under reduced pressure, a foam of an aqueous solution containing undenatured water-soluble gelatin and thrombin.
mg. of p-hydroxybenzoylpropylester are dissolved in 100 ccm. of distilled water. 5 mg. of gelatin are added and the mixture is heated to 80 C. Further working as described in Example 1.
Example 4 5 grams of gelatin in 90 com. distilled water are heated to 80 C. 2 grams of finely pulverised5- sulfanilamido-3,4-dimethylisoxazole are suspended in the warm solution. The solution is set to a pH of 6.6 by adding 5 to 10 com. of normal sodium hydroxide. The sulfanilamide then dissolves. The mixture is heated to 80 C. and Worked further in accordance with Example 1.
Example 5 0.2 gram of panthenol is dissolved in 100 com. of distilled water. 5 grams of gelatin are added. The mixture is heated to 80 C. and worked further in accordance with Example 1.
I claim:
1. As a ready-to-use hemostatic sponge, a
3. A preformed hemostatic sponge made by freezing a foam of an aqueous solution containing undenatured water-soluble gelatin and thrombin, and drying the frozen foam in vacuo at a low temperatur r ANDRE STUDER.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number .Name Date 2,166,074 Reichel July 11, 1939 2,398,077 Smith Apr. 9, 1946 FOREIGN PATENTS Number Country 7 Date 474,093 Germany Mar. 26, 1929 OTHER REFERENCES Lesser, Drug and Cosmetic Industry, March,
' 1947, page 329.
Bing, Acta Pharmacol, 1947, vol. 3, page 366.
American Druggist, October, 1947, pages 9 96 and 16 8.
Correll et al., Proc. Soc. Exper. Biol.- and Medicine, 58, 233-5, March, 1945.
Bering, J. Clinical Investigation No. 4, 1944, pages 586-590.

Claims (1)

1. AS A READY-TO-USE HEMOSTATIC SPONGE, A FREEZE-DRIED FOAM OF AN AQUEOUS SOLUTION CONTAINING UNDENATURED WATER-SOLUBLE GELATIN AND THROMBIN.
US17366A 1947-06-03 1948-03-26 Undenatured gelatin hemostatic sponge containing thrombin Expired - Lifetime US2558395A (en)

Applications Claiming Priority (1)

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CH2350347A CH264752A (en) 1947-06-03 1947-06-03 Process for the manufacture of carriers for pharmaceuticals.

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ES (1) ES183694A1 (en)

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DK73956C (en) 1952-03-31
ES183694A1 (en) 1948-07-04
CH264752A (en) 1949-10-31
DE915973C (en) 1954-08-02
AT165549B (en) 1950-03-15

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