CN2684777Y

CN2684777Y - Saccule

Info

Publication number: CN2684777Y
Application number: CN 200420033475
Authority: CN
Inventors: 唐天驷; 周云; 潘高峰; 熊成东
Original assignee: Chengdu Institute of Organic Chemistry of CAS
Current assignee: Chengdu Institute of Organic Chemistry of CAS
Priority date: 2004-03-30
Filing date: 2004-03-30
Publication date: 2005-03-16
Anticipated expiration: 2014-03-30

Abstract

The utility model relates to a saccule, comprising a hollow saccule (1)and a saccule handle (2). A thread rope or multiple-thread rope (3) are connected with the final end of the saccule handle, and the saccule is made of absorbable material. The inner of the saccule can be provided with bone cement, the saccule is used for the chest lumbar vertebra burst-forming bone fracture of the arthrosteopedic surgery operation, eliminates the lacuna in the centrum, maintains the stable reduction, and effectively avoids the leakage of the bone cement.

Description

Sacculus

Technical field

This utility model relates to a kind of the bone surgery sacculus that is used for, the particularly sacculus of being made by absorbable material.

Background technology

Treatment breast lumbar vertebra bursting fracture adopts the short-segment pedicle instrument screw system very general clinically, and it is hindered aspect vertebra height, spinal column physiologic radian and the indirect spinal canal decompression in recovery, and effect is sure.But postoperative has the phenomenon of losing of fixed failure and correction degree sometimes.One of them major reason, promptly it and fails to make the bone trabecula system to be restored simultaneously when recovering vertebral height, causes the vertebral body internal pore, i.e. " eggshell sample " vertebral body, the integrity of vertebral body structure can not be restored.Thereby, hinder vertebra and be not enough to bear axial load, cause pedicle screw system loosening under axial loading.

At present, the measure of often taking is after the pedicle of vertebral arch internal fixation system makes the reduction of the fracture, through hindering vertebra pedicle of vertebral arch injection calcium phosphate bone cement, fills the vertebral body internal pore again.

But these measures have following defective: bone cement was in flow regime before solidifying, and the potential danger of seepage is arranged, and caused the possibility of operative failure.

The utility model content

The purpose of this utility model provides a kind of sacculus with good flexibility, and bone cement places sacculus, can avoid the bone cement seepage effectively.

This utility model provides a kind of sacculus, is made up of hollow sacculus, sacculus handle.

Sacculus of the present utility model is connected with one or more cotton rope on sacculus handle end openings wall.

The diameter of sacculus of the present utility model is 10mm～50mm, and the diameter of sacculus handle is 1mm～10mm, and the length of sacculus handle is 10mm～200mm.

Sacculus of the present utility model is made by absorbable material, and the material that absorbable material can be absorbed fully by human body is as poly-L-lactic acid, poly-DL lactic acid, polycaprolactone, poly-two chalk alkane ketone etc. and their copolymer, blend.

The molecular weight that is used for the poly-L-lactic acid of sacculus is 1～800,000, and the molecular weight of poly-DL lactic acid is 2～2,000,000, and copolymer is L lactic acid-DL lactic acid, molecular weight is 2～2,000,000, polycaprolactone, poly-two chalk alkane ketone 2～2,000,000, absorbable material is market and sells, medical grade.

Sacculus of the present utility model can be by routine the plastic shaping mode as extruding or molding mode processing such as blowing, forming temperature is 110～230 ℃.

Sacculus of the present utility model is used for, on the basis of the vertebroplasty that carried out treatment breast lumbar vertebra explosion type fracture, by a catheter retaining with hinder in the vertebra, and be full of bone cement such as polymethyl methacrylate bone cement, calcium phosphate bone cement.

After bone cement solidified, the effect of sacculus was finished, and, decompose gradually, be absorbed by the body.

Its meaning is: eliminate the vertebral body internal pore, avoid " eggshell sample " vertebral body, keep stable resetting, can make not spill and leakage of charges again.Hinder the integrity of vertebra vertebral body structure from recovering breast lumbar vertebra explosion type fracture in essence, recover its height, thereby recover and keep the physiologic radian of spinal column, prevent tardy property lumbago and backache that Secondary cases kyphosis malformation causes and spinal cord, nerve injury, fundamentally to solve the simple complication of fracturing and leaving over pedicle inner fixer treatment breast lumbar vertebra explosion type.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the sketch map of sacculus of the present utility model.

1 is the hollow sacculus, bone cement can be inserted in the sacculus; 2 is that sacculus handle 3 is cotton rope, mainly with sacculus mouth bag bundle, prevents the bone cement seepage.

The specific embodiment

Embodiment 1: poly-DL lactic acid, and molecular weight 2,000,000, by extruder mould molding commonly used, extrusion temperature is 200 ℃, and the diameter of sacculus is 50mm, and the diameter of sacculus handle is 10mm, and the length of sacculus handle is 200mm.

Embodiment 2: poly-DL lactic acid, and molecular weight 200,000, by the extruder molding, extrusion temperature is 185 ℃, and the diameter of sacculus is 10mm, and the diameter of sacculus handle is 1mm, and the length of sacculus handle is 10mm, and is connected with the cotton rope that a 100mm is made by same material.

Embodiment 3: poly-L-lactic acid, and molecular weight 650,000, by the extruder molding, extrusion temperature is 220 ℃, and the diameter of sacculus is 15mm, and the diameter of sacculus handle is 8mm, and the length of sacculus handle is 100mm, and is connected with the cotton rope that 4 80mm are made by same material.

Embodiment 4: poly-L-lactic acid, and molecular weight 100,000, by the extruder molding, extrusion temperature is 215 ℃, and the diameter of sacculus is 20mm, and the diameter of sacculus handle is 3mm, and the length of sacculus handle is 80mm.

The copolymer of embodiment 5:L lactic acid-DL lactic acid, molecular weight 1,800,000, by the extruder molding, extrusion temperature is 185 ℃, and the diameter of sacculus is 30mm, and the diameter of sacculus handle is 15mm, and the length of sacculus handle is 80mm.

Embodiment 6: poly-two chalk alkane ketone, and molecular weight 1,500,000, by the extruder molding, extrusion temperature is 210 ℃, and the diameter of sacculus is 40mm, and the diameter of sacculus handle is 20mm, and the length of sacculus handle is 80mm.

The copolymer of embodiment 7:DL-lactic acid and caprolactone, molecular weight 1,800,000, by the extruder molding, extrusion temperature is 198 ℃, and the diameter of sacculus is 30mm, and the diameter of sacculus handle is 10mm, and the length of sacculus handle is 60mm.

Claims

1. a sacculus is characterized in that, sacculus is made up of hollow sacculus (1), sacculus handle (2).

2. according to the described sacculus of claim 1, it is characterized in that, be connected with one or more cotton rope (3) on the sacculus handle end openings wall.

3. according to claim 1 or 2 described sacculus, it is characterized in that the diameter of sacculus is 10～50mm, the diameter of sacculus handle is 1～10mm, and the length of sacculus handle is 10～200mm.

4. according to claim 1 or 2 described sacculus, it is characterized in that sacculus is to be made by absorbable material, absorbable material is poly-L-lactic acid, poly-DL lactic acid, polycaprolactone, poly-two chalk alkane ketone or the copolymer between them, blend.