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Expanding type vertebral body shaper

A vertebroplasty and expansion technique, applied in the direction of fixator, internal fixator, internal bone synthesis, etc., can solve the problems of broken wire left, inconvenient operation, difficult extraction, etc.

Active Publication Date: 2010-08-25
CHANGZHOU WASTON MEDICAL APPLIANCE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can restore the height of the vertebral body, reduce kyphosis, and restore the normal spine alignment, but there are also various problems, such as: cumbersome operation, and the balloon is easy to rupture (according to expert investigation, the probability of rupture is as high as 47%)
Although the balloon can be replaced after rupture and the operation can be continued, but the contrast agent injected into the balloon to observe the expansion of the balloon will leak, and the contrast agent is harmful to the human body
[0004] Chinese patent document CN1755333A discloses a metal tennis vertebral body forming device, which replaces the balloon with a metal tennis ball to prevent the balloon from being pierced by the sharp bone edge, but the metal tennis ball is easily caught by the protruding bone edge during the extraction process , leading to difficulty in extraction, broken wires left in the body, which brings troubles to the operation, and it does not have a mechanism to control the expansion of the metal tennis ball, so it is not convenient to operate

Method used

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  • Expanding type vertebral body shaper
  • Expanding type vertebral body shaper
  • Expanding type vertebral body shaper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (Embodiment 1) Referring to Fig. 4 and Fig. 5, the expandable vertebral body shaper of this embodiment includes a mandrel 1, a push tube 2 and a distraction ball 3.

[0040] The mandrel 1 includes a mandrel body 11 and a fixing column 12 that is clipped on the right end of the mandrel body 11 . The mandrel main body 11 is a steel wire. The fixing column 12 is provided with an annular groove 12-1 along the circumferential direction.

[0041] The push tube 2 includes a push tube main body 21 and two bumps 22. The push tube main body 21 is a hollow steel pipe, and the two bumps 22 are symmetrically arranged, and are divided into a front bump 22-1 and a rear bump 22-2. The block 22 - 1 is fixedly connected to the push tube main body 21 from the front, and the rear projection 22 - 2 is fixedly connected to the push tube main body 21 from the rear, and both are located on the right side of the push tube main body 21 . The push tube 2 is sleeved on the mandrel body 11 of the...

Embodiment 2

[0045] (Embodiment 2) Referring to FIG. 6 , the rest of the expandable vertebroplasty device of this embodiment is the same as that of Embodiment 1, except that a protective sheath 6 is also included. The protective cover 6 includes a sleeve 63 and a latex cover 64 . The casing 63 is a horizontal hollow circular tube, slightly thicker than the push tube 2 . The left end of latex sleeve 64 seals and opens to the right, and latex sleeve 64 is coated on the outside of sleeve pipe by its right section, and the left section of latex sleeve 64 is positioned at the left side of the left end of sleeve pipe 63, becomes and can be elastically supported from the inside. Open latex head 64-1.

[0046] When the expansion-type vertebroplasty device of this embodiment is in use, the push tube 2 together with the mandrel 1 and the expanded ball 3 are inserted into the sleeve 63 of the protective sleeve 6 from right to left, and the expanded ball 3 The left section then stretches in the late...

Embodiment 3

[0047] (Embodiment 3) Referring to Fig. 1 , the expansion type vertebroplasty device of this embodiment includes a mandrel 1, a push tube 2, a distraction ball 3, a fixed ring 4, a control assembly 5 and a housing.

[0048] 2 and 3, the housing includes a front housing 7 and a rear housing 8. Both the front housing 7 and the rear housing 8 are injection-molded integral parts, and the structures of the two are basically symmetrical.

[0049] The front casing 7 includes a front casing main body, a left front baffle 73 , a right front baffle 74 and two front limit stops 75 . The front shell body includes a front shell gun handle 71, a front shell gun handle 72 connected to the lower right side of the front shell gun handle 71, and a front shell on the left side at the junction of the front shell gun handle 71 and the front shell gun handle 72. The handle groove 76, the elongated front hole 77 provided on the front shell gun shaft portion 71 and the front shell scale 78 located on...

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Abstract

The invention relates to an expanding type vertebral body shaper, comprising a mandrel, an ejector sleeve and a propped-open ball, wherein the ejector sleeve is sleeved on the mandrel; the propped-open ball is made from developer doped with high polymer medical plastics; the left end of the propped-open ball is fixed on the left end head of the mandrel, and the right end thereof is fixedly connected with the left end head of the ejector sleeve in a detachable manner; when the ejector sleeve is arranged at the right side of the mandrel, the connecting bars of the propped-open ball main body are in an unfolded state, and the connecting bars of the propped-open ball main body are in a curled state when the ejector sleeve is arranged at the left side of the mandrel. The invention can be added with a protection jacket which comprises a sleeve and a latex coat, the latex coat is provided with a sealed left end and a right opening, the right section of the latex coat covers the outside of the sleeve, and the left section thereof is arranged at the left of the left end of the sleeve, thus being a latex rubber nipple which is propped open inside. The invention also can be added with a gun-shaped casing and a control component to simplify the expanding operation of the propped-open ball. The expanding type vertebral body shaper is convenient, safe and reliable.

Description

technical field [0001] The invention relates to a medical device for orthopedic surgery, especially for treating vertebral body compression fractures. Background technique [0002] Long-term calcium deficiency in the human body can lead to osteoporosis, which can lead to fractures in severe cases. For vertebral compression fractures caused by osteoporosis, traditional conservative treatment methods emphasize bed rest, but they cannot quickly and effectively relieve the patient's persistent and severe pain. And the aggravation of kyphosis, resulting in reduced chest volume, ventilation disorders, chronic hypoxia, cardiopulmonary dysfunction, and significantly increased mortality. In recent years, percutaneous vertebroplasty and balloon kyphoplasty developed on this basis have the advantages of minimally invasive, rapid pain relief, and sufficient improvement of kyphotic deformity. opened up a new path. [0003] Percutaneous vertebroplasty is to inject bone cement into the ...

Claims

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Application Information

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IPC IPC(8): A61B17/56A61B17/70A61F2/44
Inventor 丁亮华胡任民高志良曹志达
Owner CHANGZHOU WASTON MEDICAL APPLIANCE CO LTD
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