Tympanic membrane ventilation drainage tube placing device

Abstract

A puncture placement mechanism is connected with a release mechanism, a needle tip is formed at the end of a needle tube of the puncture placement mechanism, and a tympanic membrane ventilation drainage tube and a limiting driving assembly are contained in a placement cavity and a driving cavity in the needle tube correspondingly, so that the puncture placement mechanism can directly puncture a tympanic membrane through the needle tip, and the tympanic membrane ventilation drainage tube can be placed in the placement cavity. An incision is formed in the tympanic membrane, the tympanic membrane ventilation drainage tube can be conveniently placed, the incision does not need to be formed through an operation in advance, meanwhile, the releasing assembly drives the driving assembly to axially move in the needle tube, the limiting driving assembly drives the tympanic membrane ventilation drainage tube to axially move in the needle tube synchronously, and therefore the tympanic membrane ventilation drainage tube is pushed out of the end of the needle tube. When the tympanic membrane placement device is used, the tympanic membrane is fixed in an incision of the tympanic membrane, the release assembly drives the driving assembly to reset, and the puncture placement mechanism is pulled away through the grab handle, so that the tympanic membrane puncture, the placement of the tympanic membrane ventilation drainage tube and the withdrawal of the operating instrument can be synchronously completed through one-time action of the placement device, the operation is simple, and the placement efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of tympanic membrane ventilation and drainage tubes, and in particular to a placement technology of tympanic membrane ventilation and drainage tubes. Background Art

[0002] In the treatment of secretory otitis media, a tympanic membrane ventilation and drainage tube is usually placed on the patient's tympanic membrane. Tympanic membrane ventilation and drainage tubes include metal ventilation and drainage tubes and silicone ventilation and drainage tubes. The metal ventilation and drainage tube body is provided with a sharp puncture needle, which can be used to directly puncture the tympanic membrane and place the metal ventilation and drainage tube on the tympanic membrane. As for the silicone ventilation and drainage tube, the silicone ventilation and drainage tube is usually squeezed into the placement device before surgery. First, an incision is made on the tympanic membrane with a scalpel, and then the tympanic membrane ventilation and drainage tube is placed in the incision through the release mechanism.

[0003] For example, Chinese patent publication number CN 215131552 U discloses a tympanic membrane tube placement device, which fixes a T-shaped tympanic membrane ventilation tube to the front end of a catheter, extends the catheter to the tympanic membrane incision, and then pushes the T-shaped tympanic membrane ventilation tube into the tympanic membrane incision.

[0004] However, for silicone ventilation and drainage tubes, existing applicators require an incision surgery before placement, and the tiny silicone ventilation and drainage tube needs to be squeezed into the small applicator in the operating room, which is complicated to operate and has low surgical efficiency.

[0005] Therefore, how to effectively improve the placement efficiency of the silicone ventilation and drainage tube so that the silicone ventilation and drainage tube can be quickly and stably placed in the tympanic membrane, thereby improving the efficiency of the operation has become an urgent problem to be solved in this field. Summary of the Invention

[0006] In view of the defects of the prior art, the object of the present invention is to provide a tympanic membrane ventilation and drainage tube placer that is simple to operate and has high placement efficiency.

[0007] In order to achieve the above object, the tympanic membrane ventilation drainage tube placement device provided by the present invention includes a release mechanism and also includes

[0008] The puncture placement mechanism is connected to the release mechanism and includes a needle tube. One end of the needle tube that cooperates with the release mechanism forms a drive cavity, and the other end forms a needle tip. A placement cavity is formed between the needle tip and the drive cavity. The placement cavity is configured to accommodate a tympanic membrane ventilation and drainage tube therein, and the drive cavity is configured to accommodate a limit drive assembly therein. The release mechanism can drive the limit drive assembly to move axially and reset in the needle tube.

[0009] Furthermore, a transparent sheath is provided on the outside of the placement cavity, and a window matching the transparent sheath is provided on the placement cavity.

[0010] Furthermore, a puncture limiting block is formed on one end of the transparent sheath that cooperates with the needle tip, and the puncture limiting block extends along the outer side of the transparent sheath.

[0011] Furthermore, the position-limiting drive assembly includes a thimble, and one end of the thimble that cooperates with the tympanic membrane ventilation and drainage tube forms a support portion built into the tympanic membrane ventilation and drainage tube.

[0012] Furthermore, an end region of the ejector pin that cooperates with the release mechanism forms a limiting portion, and the limiting portion is configured in an I-shape.

[0013] Furthermore, the limit drive assembly further includes a drive limit block, which is fixed in the drive cavity, disposed outside the limit portion, and can abut against both ends of the limit portion.

[0014] Furthermore, a pushing device is provided in the release mechanism, the pushing device abuts against the ejector pin and is configured to be able to reciprocate in the release mechanism.

[0015] Furthermore, the puncture placement mechanism and the release mechanism are configured into an integrated structure.

[0016] Furthermore, the puncture placement mechanism and the release mechanism are configured as a split structure that cooperates with each other.

[0017] The tympanic membrane ventilation and drainage tube placement device provided by the present invention adopts a puncture placement mechanism connected to a release mechanism, wherein a needle tip is formed at the end of the needle tube of the puncture placement mechanism, and the placement cavity and the drive cavity formed inside the needle tube respectively accommodate the tympanic membrane ventilation and drainage tube and the limit drive assembly, so that the puncture placement mechanism can directly puncture the tympanic membrane through the needle tip, forming an incision on the tympanic membrane, which is convenient for the placement of the tympanic membrane ventilation and drainage tube, without the need to form an incision through surgery in advance. At the same time, the release assembly drives the drive assembly to move axially in the needle tube, so that the limit drive assembly can drive the tympanic membrane ventilation and drainage tube to move axially in the needle tube synchronously, thereby pushing the tympanic membrane ventilation and drainage tube out of the needle tube end and fixing it in the incision of the tympanic membrane. The release assembly then drives the drive assembly to reset to withdraw the puncture placement mechanism. Therefore, one action of the placement device can simultaneously complete the puncture of the tympanic membrane, the placement of the tympanic membrane ventilation and drainage tube, and the withdrawal of the puncture placement mechanism, which is simple to operate and can also improve the placement efficiency of the tympanic membrane ventilation and drainage tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 A schematic diagram of the overall structure of the tympanic membrane ventilation and drainage applicator provided by the present invention;

[0020] Figure 2 It is a structural diagram of the puncture placement mechanism of the present invention;

[0021] Figure 3 Schematic diagram of the release mechanism of the present invention;

[0022] Figures 4 to 7 Schematic diagram of the application process of the tympanic membrane ventilation and drainage implant in the present invention.

[0023] Reference numerals:

[0024] 100. Puncture placement mechanism; 110. Needle tube; 111. Needle tip; 112. Placement chamber; 1121. Window; 113. Drive chamber; 120. Limit drive assembly; 121. Ejector pin; 1211. Support portion; 1212. Limit portion; 1213. First end; 1214. Second end; 122. Limit block; 130. Transparent sheath; 131. Puncture limit block;

[0025] 200. Release mechanism; 210. Handle; 211. Slider; 212. Spring; 220. Connecting cavity; 230. Pushing device;

[0026] 300. Tympanic membrane ventilation and drainage tube; 400. Tympanic membrane. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0028] See also Figure 1 and Figure 2 , which shows an example of the tympanic membrane ventilation drainage tube placement device provided by the present invention.

[0029] As can be seen from the figure, the tympanic membrane ventilation and drainage tube placement device of this example mainly includes a puncture placement mechanism 100 and a release mechanism 200.

[0030] The puncture placement mechanism 100 is connected to the release mechanism 200, including a needle tube 110. One end of the needle tube 110 that cooperates with the release mechanism 200 is formed with a drive cavity 113, and the other end is formed with a needle tip 111. A placement cavity 112 is formed between the needle tip 111 and the drive cavity 113. The placement cavity 112 is configured to accommodate the tympanic membrane ventilation and drainage tube 300 therein, and the drive cavity 113 is configured to accommodate the limit drive assembly 120 therein. The release mechanism 200 is configured to drive the limit drive assembly 120 to move axially and reset in the needle tube 110.

[0031] Thus, the puncture placement mechanism 100 and the release mechanism 200 cooperate so that one action of the placement device can simultaneously complete the puncture of the tympanic membrane, the placement of the tympanic membrane ventilation and drainage tube 300, and the withdrawal of the puncture placement mechanism 100. The operation is simple and the placement efficiency of the tympanic membrane ventilation and drainage tube 300 can be improved.

[0032] Combine Figure 2 A needle tip 111 is formed at the end of the needle tube 110, so that when the puncture placement mechanism 100 is placed in the ear canal and gradually approaches the tympanic membrane 400, the needle tip 111 can puncture the tympanic membrane 400 and form an incision on the tympanic membrane 400, which is convenient for placing the tympanic membrane ventilation and drainage tube 300 in the cavity 112. There is no need to make an incision on the tympanic membrane through surgery before operating the placement device, thereby improving the placement efficiency of the tympanic membrane ventilation and drainage tube 300.

[0033] Furthermore, a transparent sheath 130 is provided on the outside of the accommodation cavity 112 in the middle area of the needle tube 110, and a puncture limit block 131 is formed on one end of the transparent sheath 130 that cooperates with the needle tip 111, and the puncture limit block 131 extends along the outside of the transparent sheath 130, so that the diameter of the puncture limit block 131 is slightly larger than the diameter of the needle tube 110, so that the needle tip 111 punctures the tympanic membrane 400. When an incision is formed on the tympanic membrane 400, the needle tip 111 is placed on the inner side of the tympanic membrane 400, and the puncture limit block 131 can abut against the outer side of the tympanic membrane 400, thereby limiting the movement of the needle tip 111, controlling the puncture depth of the needle tip 111, and preventing the needle tip 111 from puncturing too deeply.

[0034] Here, the distance between the end of the needle tip 111 and the puncture limit block 131 is adapted to the puncture depth and can be adaptively adjusted according to specific applications.

[0035] In some embodiments, the puncture limit block 131 may be made of a flexible limit block, such as a silicone block, to ensure that the puncture limit block 131 does not cause damage to the eardrum 400 when it abuts against the eardrum 400.

[0036] Furthermore, part of the tube wall of the placement cavity 112 is cut off to form a window 1121 that matches the transparent sheath 130 , so that medical staff can visually inspect the tympanic membrane ventilation and drainage tube 300 through the window 1121 through the transparent sheath 130 before surgery.

[0037] In order to enable the tympanic membrane ventilation and drainage tube 300 to move stably in the needle tube 110 and be placed in the incision, a drive cavity 113 is formed at the end of the needle tube 110 that cooperates with the release mechanism 200, and the limit drive assembly 120 is placed in the drive cavity 113, so that when the release mechanism 200 drives the limit drive assembly 120 to move axially in the needle tube 110 facing the needle tip 111, the drive assembly 120 can abut against the tympanic membrane ventilation and drainage tube 300 and drive the tympanic membrane ventilation and drainage tube 300 to move axially towards the needle tip 111 synchronously, so that the tympanic membrane ventilation and drainage tube 300 is pushed out from the end of the needle tube 110.

[0038] Specifically, the limit drive assembly 120 includes a pin 121, the diameter of which is adapted to the tympanic membrane ventilation and drainage tube 300, and a support portion 1211 is formed at one end that cooperates with the tympanic membrane ventilation and drainage tube 300, and the diameter of the support portion 1211 is smaller than the tympanic membrane ventilation and drainage tube 300, so that when the pin 121 abuts against the tympanic membrane ventilation and drainage tube 300, the support portion 1211 is built into the tympanic membrane ventilation and drainage tube 300, so that when the limit drive assembly 120 drives the tympanic membrane ventilation and drainage tube 300 to move axially toward the needle tip 111, the support portion 1211 can support the tympanic membrane ventilation and drainage tube 300, guide the movement direction of the tympanic membrane ventilation and drainage tube 300, and ensure that the tympanic membrane ventilation and drainage tube 300 always maintains axial movement during the movement process without offset and curling.

[0039] Furthermore, tympanostomy tube 300 is pushed out from the end of needle tube 110. Due to its own elastic force, tympanostomy tube 300 expands and is fixed in the incision. In the prior art, to facilitate operation during surgery, tympanostomy tube 300 is typically made of a certain thickness to increase its rigidity. This increases the weight of tympanostomy tube 300, which can aggravate the patient's discomfort.

[0040] The present applicator is built into the tympanic membrane ventilation and drainage tube 300 through the support portion 1211 of the ejector pin 121, so that when the tympanic membrane ventilation and drainage tube 300 is unfolded under the action of its own elastic force, the support portion 1211 is built into the tympanic membrane ventilation and drainage tube 300, and while supporting the tympanic membrane ventilation and drainage tube 300, it can effectively increase the hardness of the tympanic membrane ventilation and drainage tube 300, ensuring that the tympanic membrane ventilation and drainage tube 300 does not curl. After unfolding, it can stably open the incision of the tympanic membrane, so that the tympanic membrane ventilation and drainage tube 300 is stably fixed in the incision. Therefore, the present applicator can adopt a lighter tympanic membrane ventilation and drainage tube 300, and through the cooperation of the support portion 1211 and the tympanic membrane ventilation and drainage tube 300, the tympanic membrane ventilation and drainage tube 300 is ensured to be effectively fixed, thereby improving the patient's comfort. Figure 5 and Figure 6 shown.

[0041] Combine Figure 2Furthermore, the limit drive assembly 120 also includes a drive limit block 122, and the end area of the ejector pin 121 that cooperates with the release mechanism 200 forms a limit portion 1212. The drive limit block 122 cooperates with the limit portion 1212 to limit the moving stroke of the ejector pin 121 during its movement, thereby preventing the ejector pin 121 from moving too far and causing harm to the patient or falling off from the needle tube 110.

[0042] Specifically, the diameter of the limiting portion 1212 is smaller than the diameter of the main body of the ejector pin 121, so that the limiting portion 1212 is configured into an I-shape. In coordination therewith, the driving limiting block 122 is fixed in the driving cavity 113 and is arranged on the outside of the limiting portion 1212, so that when the ejector pin 121 moves axially in the needle tube 110, the driving limiting block 122 can respectively abut against the two ends of the limiting portion 1212, thereby limiting the movement of the ejector pin 121.

[0043] As an example, in the initial state, the driving limit block 122 abuts against the second end 1214 of the limit portion 1212. Figure 4 As shown, when the ejector pin 121 moves axially in the needle tube 110 toward the needle tip 111, the ejector pin 121 drives the limiting portion 1212 to move axially toward the needle tip 111 synchronously, as shown in FIG. Figure 5 As shown, until the driving limit block 122 abuts against the first end 1213 of the limiting portion 1212, the limiting portion 1212 cannot continue to move axially toward the needle tip 111 under the abutment of the driving limit block 122, thereby limiting the movement of the ejector 121 and preventing the ejector 121 from continuing to move and causing harm to the patient or falling off from the needle tube 110. Figure 6 shown.

[0044] Correspondingly, when the ejector pin 121 moves axially away from the needle tip 111 in the needle tube 110, the ejector pin 121 drives the limiting portion 1212 to move axially away from the needle tip 111 synchronously until the driving limiting block 122 abuts against the second end 1214 of the limiting portion 1212, so that the limiting portion 1212 cannot continue to move axially away from the needle tip 111 under the abutting action of the driving limiting block 122, thereby resetting the ejector pin 121.

[0045] Furthermore, the distance between the two ends of the limiting portion 1212 and the driving limiting block 122 constitutes the moving stroke of the ejector pin 121. The moving stroke of the ejector pin 121 needs to be adapted to the placement moving stroke of the tympanic membrane ventilation and drainage tube 300. That is, when the driving limiting block 122 abuts against the first end 1213 of the limiting portion 1212, the ejector pin 121 can completely push the tympanic membrane ventilation and drainage tube 300 out of the needle tube 100, and enable the tympanic membrane ventilation and drainage tube 300 to be unfolded and fixed in the incision of the tympanic membrane 400, as shown in FIG. Figure 6 shown.

[0046] Here, the specific moving stroke of the ejector 121 , that is, the distance between the two ends of the limiting portion 1212 and the driving limiting block 122 , is not limited and can be adaptively adjusted according to specific applications.

[0047] The puncture placement mechanism 100 thus constructed can directly puncture the tympanic membrane to form an incision through the needle tip 111 of the needle tube 110 during operation, without the need for pre-operative incision, and cooperate with the tympanic membrane ventilation and drainage tube 300 through the limiting drive component 120, so that the tympanic membrane ventilation and drainage tube 300 is stably fixed in the incision, thereby improving the placement efficiency.

[0048] Furthermore, the tympanic membrane ventilation and drainage tube 300 can be pre-built into the puncture placement mechanism 100 , eliminating the need to fill the tympanic membrane ventilation and drainage tube 300 at the surgical site, thereby further improving the placement efficiency of the tympanic membrane ventilation and drainage tube 300 .

[0049] In order to illustrate the specific structure of the placement device, the following example illustrates the cooperation between the puncture placement mechanism 100 and the release mechanism 200.

[0050] In some embodiments, the puncture placement mechanism 100 and the release mechanism 200 are configured as an integrated structure to ensure the structural stability of the placement device.

[0051] In other embodiments, the puncture placement mechanism 100 and the release mechanism 200 are configured as a split structure that cooperate with each other, so that after the tympanic membrane ventilation and drainage tube 300 is fixed in the incision, the puncture placement mechanism 100 can be removed from the release mechanism 200 and the tympanic membrane ventilation and drainage tube 300 can be re-placed to achieve multiple uses of the puncture placement mechanism 100.

[0052] Combine Figure 1 and Figure 3 Specifically, the release mechanism 200 includes a handle 210, a connecting cavity 220 and a pushing device 230. One end of the connecting cavity 220 is connected to the puncture placement mechanism 100, and the other end is connected to the handle 210. The pushing device 230 is built into the release mechanism 200. One end area of the pushing device 230 is placed in the connecting cavity 220 and abuts against the ejector pin 121 in the puncture placement mechanism 100, and the other end is placed in the handle 210 and is elastically connected to the slider 211 outside the handle 210 through a spring 212, so that the pushing device 230 reciprocates in the release mechanism 200, which can drive the ejector pin 121 to move axially in the needle tube 110 and reset.

[0053] As an example, when the slider 211 is pushed, the slider 211 can drive the pushing device 230 to move synchronously in the release mechanism 200 toward the puncture placement mechanism 100 to compress the spring 212, and at the same time drive the ejector pin 121 to move axially in the needle tube 110 toward the needle tip 121, thereby pushing the tympanic membrane ventilation and drainage tube 300 out of the needle tube 110 and fixing it in the incision.

[0054] Furthermore, when the slider 211 is released, the spring 212, under the action of its own elastic restoring force, drives the pushing device 230 to move synchronously in the release mechanism 200 away from the puncture placement mechanism 100, and at the same time drives the ejector pin 121 to move axially in the needle tube 110 away from the needle tip 121, thereby driving the ejector pin 121 to reset.

[0055] The following examples illustrate the working process of the present invention in a specific application. It should be noted that the content described here is only a specific application example of this solution and does not constitute a limitation to this solution.

[0056] Taking the T-shaped tympanic membrane ventilation and drainage tube 300 commonly used in this field as an example, the tympanic membrane ventilation and drainage tube 300 is pre-extruded and built into the placement cavity 112 of the needle tube 110 in the puncture placement mechanism 100, so that there is no need to fill the tympanic membrane ventilation and drainage tube 300 at the surgical site, thereby improving the placement efficiency.

[0057] Connect the puncture placement mechanism 100 and the release mechanism 200 to form the present placement device, as shown in FIG. Figure 1 and Figure 4 shown.

[0058] Next, the puncture placement mechanism 100 of the present applicator is placed in the ear canal, gradually approaching the tympanic membrane 400, so that the needle tip 111 punctures the tympanic membrane 400 and forms an incision on the tympanic membrane 400. At this time, the needle tip 111 is placed on the inner side of the tympanic membrane 400, and the puncture limit block 131 can abut against the outer side of the tympanic membrane 400, thereby limiting the movement of the needle tip 111, controlling the puncture depth of the needle tip 111, and preventing the needle tip 111 from puncturing too deep.

[0059] Therefore, during the placement process of the present applicator, the needle tip 111 simultaneously punctures the tympanic membrane 400 to form an incision on the tympanic membrane 400 to facilitate the placement of the tympanic membrane ventilation and drainage tube 300. There is no need to perform an incision on the tympanic membrane through surgery before operating the present applicator, thereby improving the placement efficiency of the tympanic membrane ventilation and drainage tube 300.

[0060] Furthermore, the slider 211 outside the handle 210 in the release mechanism 200 is pushed, so that the slider 211 drives the pushing device 230 to move synchronously in the release mechanism 200 toward the puncture placement mechanism 100, compressing the spring 212, and at the same time driving the ejector pin 121 to move axially in the needle tube 110 toward the needle tip 121, thereby causing the ejector pin 121 to drive the tympanic membrane ventilation and drainage tube 300 to move axially toward the needle tip 111 synchronously, as shown in FIG. Figure 5 shown.

[0061] During the process of the tympanic membrane ventilation and drainage tube 300 synchronously moving axially toward the needle tip 111, the support portion 1211 is built into the tympanic membrane ventilation and drainage tube 300 to support the tympanic membrane ventilation and drainage tube 300 and guide the movement direction of the tympanic membrane ventilation and drainage tube 300, thereby ensuring that the tympanic membrane ventilation and drainage tube 300 always maintains axial movement during the movement without offset or curling.

[0062] like Figure 5 As shown, when the ejector pin 121 drives the tympanic membrane ventilation and drainage tube 300 out from the end of the needle tube 110, the tympanic membrane ventilation and drainage tube 300 is initially expanded under the action of its own elastic force and is in a semi-expanded state. The support portion 121 supports the tympanic membrane ventilation and drainage tube 300 and continuously guides the movement direction of the tympanic membrane ventilation and drainage tube 300.

[0063] Furthermore, the ejector pin 121 drives the limiting portion 1212 to move axially toward the needle tip 111 synchronously until the driving limiting block 122 abuts against the first end 1213 of the limiting portion 1212, so that the limiting portion 1212 cannot continue to move axially toward the needle tip 111 under the abutment of the driving limiting block 122, thereby limiting the movement of the ejector pin 121 and preventing the ejector pin 121 from continuing to move and causing harm to the patient or falling off from the needle tube 110.

[0064] like Figure 6 As shown, at this time, the tympanic membrane ventilation and drainage tube 300 is completely pushed out from the end of the needle tube 110 and is in a fully expanded state under the action of its own elastic force. The support portion 1211 can effectively increase the hardness of the tympanic membrane ventilation and drainage tube 300, ensuring that the tympanic membrane ventilation and drainage tube 300 does not curl. After expansion, the incision of the tympanic membrane 400 can be stably stretched, so that the tympanic membrane ventilation and drainage tube 300 is stably fixed in the incision.

[0065] Thus, the tympanic membrane ventilation drainage tube 300 is placed.

[0066] Next, the slider 211 is released, and the spring 212, under the action of its own elastic restoring force, drives the pushing device 230 to move synchronously in the release mechanism 200 away from the puncture placement mechanism 100, and at the same time drives the ejector pin 121 to move axially in the needle tube 110 away from the needle tip 121.

[0067] At the same time, the ejector pin 121 drives the limiting portion 1212 to move axially away from the needle tip 111 synchronously until the driving limiting block 122 abuts against the second end 1214 of the limiting portion 1212, so that the limiting portion 1212 cannot continue to move axially away from the needle tip 111 under the abutment of the driving limiting block 122, thereby resetting the ejector pin 121.

[0068] At this time, the puncture placement mechanism 100 is pulled out by pulling out the handle 210, as shown in FIG. Figure 7 shown.

[0069] Therefore, through the cooperation of the puncture placement mechanism 100 and the release mechanism 200, the present placement device can simultaneously complete the puncture of the tympanic membrane, the placement of the tympanic membrane ventilation and drainage tube 300, and the withdrawal of the puncture placement mechanism 100 in one operation. The operation is simple and the placement efficiency of the tympanic membrane ventilation and drainage tube 300 can be improved.

[0070] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A tympanic membrane ventilation and drainage tube placement device, comprising a release mechanism, characterized in that: Also includes The puncture placement mechanism is connected to the release mechanism and includes a needle tube. One end of the needle tube that cooperates with the release mechanism forms a drive cavity, and the other end forms a needle tip. A placement cavity is formed between the needle tip and the drive cavity. The placement cavity is configured to accommodate a tympanic membrane ventilation and drainage tube therein, and the drive cavity is configured to accommodate a limit drive assembly therein. The release mechanism can drive the limit drive assembly to move axially and reset in the needle tube.

2. The tympanic membrane ventilation and drainage tube placement device according to claim 1, characterized in that: A transparent sheath is provided on the outer side of the placement cavity, and a window matched with the transparent sheath is provided on the placement cavity.

3. The tympanic membrane ventilation and drainage tube placement device according to claim 2, characterized in that: A puncture limiting block is formed on one end of the transparent sheath that cooperates with the needle tip, and the puncture limiting block extends along the outer side of the transparent sheath.

4. The tympanic membrane ventilation and drainage tube placement device according to claim 1, characterized in that: The position-limiting drive assembly includes a thimble, and one end of the thimble that cooperates with the tympanic membrane ventilation and drainage tube forms a support portion built into the tympanic membrane ventilation and drainage tube.

5. The tympanic membrane ventilation and drainage tube placement device according to claim 4, characterized in that: An end area of the ejector pin that cooperates with the release mechanism forms a limiting portion, and the limiting portion is configured in an I-shape.

6. The tympanic membrane ventilation and drainage tube placement device according to claim 5, characterized in that: The limit drive assembly further includes a drive limit block, which is fixed in the drive cavity, disposed outside the limit portion, and can abut against both ends of the limit portion.

7. The tympanic membrane ventilation and drainage tube placement device according to claim 5, characterized in that: The release mechanism is provided with a pushing device, which abuts against the ejector pin and is configured to be able to reciprocate in the release mechanism.

8. The tympanic membrane ventilation and drainage tube placement device according to claim 1, characterized in that: The puncture placement mechanism and the release mechanism are configured as an integrated structure.

9. The tympanic membrane ventilation and drainage tube placement device according to claim 1, characterized in that: The puncture placement mechanism and the release mechanism are configured as a split structure that cooperates with each other.

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