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Puncture dilator

A technology for puncture expansion and dilation of tubes, applied in the field of medical devices, can solve the problems of increased patient bleeding, no outer diameter marking, waste of resources, etc., and achieve the effect of saving operation time, saving operation time, and saving material costs

Active Publication Date: 2014-04-02
LIFETECH SCI (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This expansion method generally has the following disadvantages: 1. When it is necessary to introduce a larger-sized catheter (such as 21F or above), it is often necessary to select two or more types of puncture dilators in order from small to large Dilated puncture channel
However, in actual situations, it is often impossible to determine the specifications of the catheter to be introduced before the operation, so a series of puncture dilators of specifications need to be prepared before the operation, resulting in a waste of resources; 3. The outer diameter of the tip of the dilator changes continuously, and there is no clear outer diameter mark. Doctors often judge the insertion depth of the dilator and the diameter of the dilation port subjectively during operation, which may easily cause over-expansion. or insufficient size of the expansion port

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] figure 1 Shows a front view of an embodiment of the puncture dilator of the present invention, figure 2 further shows that figure 1 axial section. From figure 1 and figure 2 It can be seen that the puncture dilator of this embodiment includes a longitudinally connected expansion tube 1, a handle 2 and a luer lock 3, the expansion tube 1 has an inner cavity, the proximal end of the expansion tube 1 is inserted into the distal end of the handle 2, and the handle The proximal end of 2 is connected with Luer lock head 3, and sealing member 4 is arranged in this Luer lock head 3. There is a lumen inside the puncture dilator from the distal end of the expansion tube 1 to the proximal end of the Luer lock 3, so that other instruments or substances can enter or pass through the expansion tube 1 through the Luer lock 3. For general puncture dilators, both the Luer lock head 3 and the sealing part 4 are optional. If the lumen diameter of the puncture dilator is small e...

Embodiment 2

[0052] The difference between the puncture dilator of this embodiment and the preceding embodiments lies in the internal structure of the expansion tube 1, combined with image 3 , Figure 6 and Figure 7 This embodiment will be described in detail.

[0053] The appearance of the expansion tube 1 of this embodiment can be the same as that of the above-mentioned embodiment, such as image 3 As shown, the cross-sectional structure of the expansion tube 1 along the central axis is as follows Figure 6 and Figure 7 shown. Viewed as a whole, the expansion tube 1 also includes three regions: a tip part 7 , a stepped diameter reducing part 8 and a main part 9 . There is a delivery lumen 10 on the central axis of the expansion tube 1 . The delivery lumen 10 has a uniform diameter and runs through the tip part 7 , the stepped diameter reducing part 8 and the main body part 9 . The diameter of the delivery lumen 10 is slightly larger than the outer diameter of the guidewire (eg 0...

Embodiment 3

[0055] The appearance of the expansion tube 1 of the puncture dilator of the present embodiment is as follows: Figure 8 As shown, the difference from the previous embodiments is that identification rings 101, 102, 103, 104 (i.e. ring markers) are provided on the outer wall of the expansion tube 1, preferably, the identification rings 101, 102, 103, The material of 104 is similar to that of the expansion tube 1 but different in color, so as to be easily recognized by human eyes. Moreover, the identification rings 101, 102, 103, 104 are seamlessly combined with the expansion tube 1 to form a smooth and continuous outer surface. The width of identification ring 101,102,103,104 is generally 0.5-2.0mm, and its position and image 3 The markers 61, 62, 63, 64 are similar in order to highlight the distal starting positions of the cylindrical segments 11, 13, 15 and the main body portion 9. According to the raw material of expansion tube 1, the material of making marking ring can b...

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PUM

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Abstract

The invention discloses a puncture dilator, which comprises a dilation tube, a handle and an optional Ruehl tapered end connected in sequence, wherein a sealing component can be arranged in the Ruehl tapered end; an inner cavity ranging from the far end of the dilation tube to the near end of the dilation tube or the Ruehl tapered end is arranged inside the puncture dilator; the dilation tube comprises a pointed part, a reducing part and a main body part; and the main body part is connected with the handle. A dilation tube with a stepwise reducing design is adopted, and cylindrical sections of different outer diameters are formed on the same dilation tube. During surgery, dilation at different degrees can be performed on the inner diameter of a puncture channel according to practical requirements by using the same puncture dilator. The puncture dilator disclosed by the invention can be used for replacing certain conventional puncture dilation tubes, so that material cost and surgery operation time are saved.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a puncture dilator for establishing a puncture channel percutaneously and reaching the lumen of a human body. Background technique [0002] The puncture dilator is a medical device used in interventional surgery to expand the skin, subcutaneous tissue and blood vessel puncture channels (or other puncture channels of human lumens, such as esophagus, trachea, urethra, etc.). [0003] There are two main methods of vascular puncture. One is to use surgical means to incise the skin and subcutaneous tissue, expose the outer wall of the blood vessel, use a puncture needle to directly penetrate the blood vessel wall, penetrate the guide wire to establish a track, and then introduce it along the guide wire. Other devices, such as catheters, etc. This puncture method requires professional surgeons to participate in the incision and postoperative suturing operations, and at the sam...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M29/00
CPCA61M29/00
Inventor 罗建方王刚
Owner LIFETECH SCI (SHENZHEN) CO LTD