Sleeve loading type multi-gap electromagnetic hemostatic needle

A slit and sleeve technology, applied in the field of multi-slit electromagnetic hemostatic needles, can solve the problems of no local ablation therapy, complicated surgical operation process, and inability to use liver resection equipment, so as to reduce intraoperative bleeding, shorten operation time, Heating shape variable effect

Active Publication Date: 2016-07-06
WEST CHINA HOSPITAL SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing various liver resection equipments have disadvantages such as slow resection time to varying degrees, complicated surgical procedures, excessive bleeding, etc., and have no ability to be used as local ablation therapy
In addition, the various existing local liver ablation devices have a single, almost circular ablation effect shape, which cannot form an ideal cutting plane according to the surgeon's requirements, and cannot be used as a liver resection device
Therefore, in actual surgical operations, there is no equipment at home and abroad that can meet the needs of surgeons for liver resection and local ablation at the same time.

Method used

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  • Sleeve loading type multi-gap electromagnetic hemostatic needle
  • Sleeve loading type multi-gap electromagnetic hemostatic needle
  • Sleeve loading type multi-gap electromagnetic hemostatic needle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as Figure 1-4 As shown, the present invention includes an outer conductor 1 and an inner conductor 2, the outer conductor 1 is a hollow cylinder, the inner conductor 2 is arranged in the outer conductor 1, and a dielectric layer 3 is filled between the inner conductor 2 and the outer conductor 1, and the outer conductor 1 There is a ring-shaped gap 4, the outer conductor 1 is covered with a metal sleeve 5 that is adapted to the outer diameter of the outer conductor 1 and can slide axially along the outer conductor 1, the radius of the outer conductor 1 is 1.8mm, and the thickness of the dielectric layer 3 is 0.9mm mm, the radius of the inner conductor 2 is 0.9mm; the radius of the metal sleeve 5 is 1.9mm.

[0032] Preferably, the inner conductor 2 is cylindrical, and the inner conductor 2 is coaxial with the outer conductor 1 .

[0033] Preferably, there are four slots 4, the four slots 4 are arranged axially along the outer conductor 1, and the distance between ...

Embodiment 2

[0040] Such as Figure 5 As shown, the metal sleeve 5 whose length is greater than the distance between the farthest two slits 4 in Embodiment 1 is replaced with a metal sleeve 5 whose length is greater than the width of the slit 4, and the number of metal sleeves 5 is equal to the number of slits 4, That is, each slit 4 is equipped with a corresponding metal sleeve 5 .

[0041] Figure 6 In order to add the temperature field contour distribution of the metal sleeve 5 in the first gap 41, it can be seen that the temperature field distribution is in a nearly cylindrical shape.

[0042] Figure 7 Adding the temperature field contour distribution of the metal sleeve 5 to the first gap 41 and the third gap 43, it can be seen that the temperature field distribution is a shape similar to "8", and Figure 6 In combination, two heating shapes have been realized.

[0043] Figure 8 The result value of the reflection coefficient when adding the metal sleeve 5 to the first slot 41 a...

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Abstract

The invention discloses a sleeve loading type multi-gap electromagnetic hemostatic needle and belongs to the field of medical equipment.The sleeve loading type multi-gap electromagnetic hemostatic needle comprises an outer conductor (1) and an inner conductor (2).The outer conductor (1) is a hollow cylinder.The inner conductor (2) is arranged in the outer conductor (1).The space between the inner conductor (2) and the outer conductor is filled with a medium layer (3), the outer conductor (1) is provided with an annular gap (4), and the outer conductor (1) is sleeved with a metal sleeve (5) which is matched with the outer diameter of the outer conductor (1) and can slide in the axial direction of the outer conductor (1).By adjusting the position of the metal sleeve, the number of effective gaps can be adjusted to be one or larger freely by means of the electromagnetic shielding principle, and therefore the electromagnetic wave acting range and the effect shape are changed, a continuous ablation and bleeding stopping face is built according to specific requirement to perform liver resection, or a thermal ablation effect is concentrated within a round range to perform local ablation treatment.

Description

technical field [0001] The invention relates to a medical device, in particular to a multi-slit electromagnetic hemostatic needle which can change the action range and effect shape of electromagnetic waves by adjusting the position of the sleeve. Background technique [0002] For liver neoplastic diseases, the best treatment option is recognized surgical resection. However, surgical resection of liver tumors is not suitable for every patient. If the primary or metastatic tumor of the liver metastasizes intrahepatically or extrahepatically, surgical resection at this time has no obvious significance; in addition, most patients with liver tumors in my country are often accompanied by severe liver cirrhosis due to long-term damage of hepatitis virus However, the reduced liver reserve function cannot tolerate surgical resection; in the above cases, only ablation of local tumor lesions to kill tumor cells has been widely approved. Before the operation, the surgeon will formulate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B18/18
CPCA61B18/18A61B2018/00529A61B2018/00577
Inventor 冯曦林先其刘王毛李波刘非刘剑
Owner WEST CHINA HOSPITAL SICHUAN UNIV
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