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Biological repair tablet for endocranium and preparation method thereof

A dura mater and patch technology, which is applied in the field of dura mater biological patch and its preparation, can solve the problems affecting the product's anti-infection ability, tissue regeneration ability, destruction of three-dimensional structure, product instability, etc., to increase the DNA removal link, Low immunogenicity, high stability and uniform effect

Active Publication Date: 2013-09-04
BEIJING BIOSIS HEALING BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, Biodesign Surgisis products use common hybrid pigs as animal sources, and individual differences in the genetic background of hybrid animals lead to instability and inconsistency in different batches of products
On the other hand, the vacuum compression freeze-drying molding process adopted by Biodesign Surgisis products compresses the spatial structure of the SIS matrix material, destroys the natural three-dimensional structure of ECM, and affects the anti-infection ability of the product and the ability to promote tissue regeneration

Method used

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  • Biological repair tablet for endocranium and preparation method thereof
  • Biological repair tablet for endocranium and preparation method thereof
  • Biological repair tablet for endocranium and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1: Preparation of 8-layer dura mater biological patch

[0042] The preparation method is as follows:

[0043] (1) Determination of animal source and pretreatment and initial washing of small intestine tissue

[0044] The Chinese inbred Wuzhishan minipig was selected as the animal source, and the animal species was determined using the method specified in the patent ZL200510008994.2. The small intestine tissue of the freshly slaughtered Chinese inbred Wuzhishan minipig was cleaned, and the small intestinal submucosa was separated and used Rinse with water for injection 3 times.

[0045] (2) Virus inactivation

[0046] The peracetic acid-ethanol solution method is used to inactivate the virus. This step is carried out in a constant temperature ultrasonic cleaner that can shake the cleaning tank. The volume percentage of peracetic acid is 0.05~0.2% (preferably 0.1%). The time is 1~2h (preferably 1h), the temperature range is 4~40°C, and then washed 2~5 times in ...

Embodiment 2

[0055] Embodiment 2: Physical and chemical properties, histology, growth factors and biological performance detection of the material prepared in embodiment 1

[0056] 1. The physical properties of the prepared 8-layer material are tested, and the testing items include porosity measurement, suture retention, tensile strength, and burst strength.

[0057] 1) Porosity measurement: Mercury porosimetry was used to measure the porosity of the material, and compared with and compared with Biodesign Surgisis products. Results: The porosity of the sample provided in Example 1 was 87.8±2.51, and the porosity of the Biodesign Surgisis product was 78.3±6.38.

[0058] 2) Suture retention test: method: use 2-0 surgical suture or stainless steel wire of the same diameter to suture at 2 mm inside the edge of one end of the patch, and fix the suture or stainless steel wire and the other end of the patch on a tension meter On, stretch at a speed of 20mm / min until the suture point is torn, and...

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Abstract

The invention provides a biological repair tablet for endocranium and a preparation method thereof. The repair tablet uses small intestine submucosa tissues of inbred line animals without cell and DNA (deoxyribonucleic acid) components as the raw material, completely reserves the extracellular matrix component and structure, and has a micropore structure. The preparation method of the repair tablet comprises the following operation steps: determination of animal source, pretreatment and rough cleaning of small intestine tissues, virus inactivation, cell removal, DNA removal treatment, formation, packaging and sterilization. The biological repair tablet for endocranium prepared by the method uses an inbred line animal as an animal source, and thus, the hereditary features are pure, stable and uniform, thereby radically ensuring the stability and uniformity of different batches of products; and the biological repair tablet for endocranium has fewer animal source DNA residues, completely reserves the three-dimensional structure of natural ECM, and has the advantages of low immune source property and high infection resistance.

Description

technical field [0001] The invention relates to the technical field of animal-derived implantable medical devices, in particular to a dura mater biological patch and a preparation method thereof. Background technique [0002] The dura mater is a thick, tough double membrane. The outer layer is the periosteum on the inner surface of the skull, which is only loosely attached to the calvaria, especially in the occipital and temporal parts, and is called the periosteum layer; the inner layer is thicker and tougher than the outer layer, and is connected with the dura mater at the foramen magnum continuous, called the meningeal layer. The main function of the dura mater is to protect the brain tissue. Trauma, tumor, and neurosurgery can all cause dural defects. Dural reconstruction is the basic operation step of neurosurgery. An important measure; traditional dura mater reconstruction materials are mainly taken from autologous tissue, the source of materials is limited, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/36A61L27/56
Inventor 赵博王振军
Owner BEIJING BIOSIS HEALING BIOLOGICAL TECH
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