Ablation steam conveying device

Abstract

The utility model discloses an ablation steam conveying device which comprises an ablation needle tube sheath, a guide head, a stepping motor, a lead screw, a lead screw nut seat and a steam conveying tube, and the steam conveying tube comprises a steam conveying outer sleeve, a steam conveying inner sleeve and a steam conveying needle. Under the driving of the stepping motor, the head end of the steam conveying needle can extend out of the guiding head by an accurate length in the direction approximate to 90 degrees to reach a target position or retract into the guiding head, steam can reach tissue at the target position through the steam outlet hole of the steam conveying needle for ablation treatment, and the steam conveying position is accurate; in addition, the injury to the patient can be reduced, the cost is lower, and the disposable use can be realized. In addition, the steam conveying inner sleeve can achieve primary heat insulation and heat preservation on the steam conveying needle, the strength of the steam conveying needle can be improved so that movable operation can be achieved, the steam conveying outer sleeve can achieve secondary heat preservation on the steam conveying needle, and the steam conveying pipe can be prevented from scalding the human body.

Description

Technical Field

[0001] This utility model relates to the field of steam ablation medical equipment technology, and more specifically, to an ablation steam delivery device. Background Technology

[0002] Steam ablation, as a surgical treatment method, involves injecting high-temperature sterile steam into the tissue of the lesion area through a steam delivery tube. This causes the lesion tissue to gradually lose its activity, eventually leading to apoptosis and necrosis. Simultaneously, non-lesion tissue is cooled with water to prevent burns. One to three months post-surgery, the necrotic lesion tissue gradually shrinks or sloughs off and is eliminated through metabolism, thus achieving the therapeutic effect. Existing steam ablation equipment typically includes a steam delivery tube and a tube movement drive. The drive drive moves the steam delivery tube, delivering steam to the target location. This applies steam at a specific temperature to the target area of ​​the tissue, causing burns, necrosis, and subsequent damage, shrinkage, or denaturation, achieving the ablation purpose. However, existing steam ablation equipment has the following shortcomings:

[0003] 1. The structure is complex, the volume is large, and the cost is high. The steam delivery pipe cannot accurately reach the target location, and the steam delivery pipe may cause damage by rubbing against human tissue after entering the human body.

[0004] 2. If the steam delivery pipe is not properly insulated, it can easily cause other burns or incomplete ablation to the human body. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned defects in the prior art and provide an ablation steam conveying device.

[0006] To achieve the above objectives, this utility model provides an ablation steam delivery device, including an ablation needle sheath, a guide head, a stepper motor, a lead screw, a lead screw nut seat, and a steam delivery pipe. The guide head is installed at the head end of the ablation needle sheath. One end of the output shaft of the stepper motor is connected to the lead screw and can drive it to rotate. The lead screw nut seat is movably installed on the lead screw. The steam delivery pipe is located inside the ablation needle sheath and includes a steam delivery outer sleeve, a steam delivery inner sleeve, and a steam delivery needle. The steam delivery outer sleeve is fitted over the steam delivery inner sleeve, and the steam delivery inner sleeve is installed over and fixedly connected to the steam delivery needle. The tail end of the inner sleeve of the steam delivery tube is installed on the screw nut seat. The head end and tail end of the steam delivery needle both extend out of the outer sleeve and the inner sleeve of the steam delivery tube. The head end of the steam delivery needle is provided with a sealing needle tip. The side of the head end of the steam delivery needle is provided with several rows of steam outlet holes that connect to the inside of the steam delivery needle. The inside of the guide head is provided with a needle tip correction part and a steam needle guide arc for guiding the steam delivery needle to change direction. The bottom of the guide head is provided with an inlet and outlet needle port that connects to its interior and is opposite to the end of the steam needle guide arc. The stepper motor can drive the steam delivery needle to move linearly, and the head end of the steam delivery needle can extend or retract inside the guide head.

[0007] Preferably, the ablation needle sheath is made of PTFE or FEP thermoplastic material.

[0008] Preferably, the outer surface of the guide head is curved, with a small head and a straight tail, and is made of transparent material.

[0009] Preferably, the steam delivery needle is made of polyetheretherketone (PEEK) material.

[0010] Preferably, the steam conveying outer sleeve is a stainless steel sleeve.

[0011] Preferably, sealing rings are provided at both ends of the steam conveying outer sleeve and between the steam conveying inner sleeve.

[0012] Preferably, the system also includes a contact-type start switch and a stop switch, wherein the start switch is located on the starting side of the lead screw nut seat and the stop switch is located on the ending side of the lead screw nut seat, and the lead screw nut seat can contact the start switch and the stop switch respectively.

[0013] Preferably, the other end of the output shaft of the stepper motor is provided with a manual wrench.

[0014] Preferably, the head end of the steam delivery needle is provided with three rows of steam holes, with an axial spacing angle of 120°, and the number of each row of steam holes is 3-6.

[0015] Preferably, the head end of the steam delivery needle is provided with several marking lines located behind the steam outlet and spaced apart.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This utility model has a compact structure and reasonable design. Driven by a stepper motor, the head of the steam delivery needle can extend from the guide head at approximately 90 degrees to the target position or retract into the guide head. Steam can reach the target tissue through the steam outlet of the steam delivery needle for ablation treatment. The steam delivery position is precise, and the entry and exit of the patient's lumen is smoother. It can also reduce harm to the patient, has a low cost, can be used once, and reduces secondary pollution.

[0018] 2. The steam delivery pipe of this utility model includes a steam delivery outer sleeve, a steam delivery inner sleeve, and a steam delivery needle. The steam delivery inner sleeve can provide the first layer of heat insulation for the steam delivery needle and improve the strength of the steam delivery needle to enable it to move and operate. The steam delivery outer sleeve can provide the second layer of heat insulation for the steam delivery needle, which can prevent the steam delivery pipe from burning the human body. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the ablation steam conveying device provided in this embodiment of the utility model;

[0021] Figure 2 This is an exploded view of the ablation steam conveying device provided in this embodiment of the utility model;

[0022] Figure 3 This is a cross-sectional view of the head end of the ablation steam conveying device provided in this embodiment of the utility model;

[0023] Figure 4 This is a cross-sectional view of the guide head provided in an embodiment of the present invention;

[0024] Figure 5 This is a partial structural cross-sectional view of the guide head provided in an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the head end of the steam delivery needle provided in the embodiment of the utility model. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] Please refer to Figure 1 and Figure 2 The present invention provides an ablation steam delivery device, including an ablation needle sheath 1, a guide head 2, a stepper motor 3, a lead screw 4, a lead screw nut seat 5, and a steam delivery pipe 6. The components of this embodiment will be described in detail below with reference to the accompanying drawings.

[0028] In this embodiment, the ablation needle sheath 1 can preferably be made of PTFE or FEP thermoplastic material, which has a smooth surface.

[0029] like Figure 1 As shown, one end of the output shaft of the stepper motor 3 can be connected to the lead screw 4 and drive it to rotate. The lead screw nut seat 5 is movably mounted on the lead screw 4, and the steam delivery pipe 6 is located inside the ablation needle sheath 1.

[0030] like Figure 2 and Figure 3 As shown, the steam delivery pipe 6 may include a steam delivery outer sleeve 61, a steam delivery inner sleeve 62, and a steam delivery needle 63. The steam delivery outer sleeve 61 is fitted over the outer side of the steam delivery inner sleeve 62. The steam delivery inner sleeve 62 is installed over the outer side of the steam delivery needle 63 and is fixedly connected to it. The two ends of the inner sleeve 62 can be glued to the steam delivery needle 63. The tail end of the inner sleeve 62 is installed on the screw nut seat 5. The head end and tail end of the steam delivery needle 63 extend out of the steam delivery outer sleeve 61 and the steam delivery inner sleeve 62. The head end of the steam delivery needle 63 is provided with a sealing needle tip. The side of the head end of the steam delivery needle 63 is provided with several rows of steam outlet holes 64 that communicate with the interior of the steam delivery needle 63.

[0031] The steam delivery outer sleeve 61 can preferably be made of stainless steel. The steam delivery needle 63 can preferably be made of polyetheretherketone (PEEK) material. PEEK material has excellent properties such as good insulation, heat resistance, wear resistance, fatigue resistance, radiation resistance, peel resistance, chemical corrosion resistance, creep resistance, dimensional stability, impact resistance, non-toxicity, and flame retardancy. At the same time, its good plasticity allows it to extend under the action of the steam needle guide arc and needle correction part in the guide head during movement.

[0032] like Figure 3 As shown, preferably, O-rings 65 can be provided between the two ends of the steam conveying outer sleeve 61 and the steam conveying inner sleeve 62.

[0033] In this embodiment, the inner steam delivery sleeve provides the first layer of heat insulation for the steam delivery needle and increases its strength to enable movement. The outer steam delivery sleeve provides the second layer of heat insulation for the steam delivery needle, preventing the steam delivery tube from scalding the human body.

[0034] Preferably, the head end of the steam delivery needle 63 can be provided with three rows of steam holes 64, with an axial spacing angle of 120°, and the number of each row of steam holes 64 can be 3-6, which can make the steam evenly sprayed to the target area.

[0035] like Figure 6 As shown, the head end of the steam delivery needle 63 may also be provided with several marking lines 66 located behind the steam outlet 64 and spaced apart.

[0036] The guide head 2 is installed at the head end of the ablation needle sheath 1. The outer surface of the guide head 2 is composed of a curved surface, with a small head and a straight tail. It is made of transparent material and can enter the human body lumen without causing damage.

[0037] like Figure 4 and Figure 5 As shown, the inside of the guide head 2 is provided with a needle correction part 21 and a steam needle guide arc 22 for guiding the steam delivery needle 63 to change direction. The bottom of the guide head 2 is provided with an inlet / outlet needle port 23 that connects to its interior and is opposite to the end of the steam needle guide arc 22.

[0038] like Figure 1 and Figure 2 As shown, the device may also include a contact-type start switch 7 and stop switch 8. The start switch 7 is located on the starting side of the lead screw nut seat 5, and the stop switch 8 is located on the ending side of the lead screw nut seat 5. During movement, the lead screw nut seat 5 can contact the corresponding start switch 7 and stop switch 8 respectively. The position of the needle and the stroke range (maximum 15mm) can be determined by the stop switch 7 and start switch 8.

[0039] like Figure 1 and Figure 2 As shown, a manual wrench 9 can be additionally installed at the other end of the output shaft of the stepper motor 3. The manual wrench 9 can be used to manually rotate the output shaft of the motor in case of motor drive failure, thereby driving the lead screw 4 to rotate and completing the movement of the steam delivery needle, thus ensuring safe and reliable operation.

[0040] like Figure 3As shown, the stepper motor 3 can drive the steam delivery needle 63 to perform linear motion, and the head end of the steam delivery needle 63 can extend out of the inlet / outlet needle port 23 of the guide head 2. When the needle is out, the tip of the steam delivery needle is arc-shaped and the needle tip direction is 85°, that is, approximately 90°. When the stepper motor 3 drives the steam delivery needle 63 to reset, the head end of the steam delivery needle 63 can retract into the guide head 2.

[0041] In summary, this utility model has a compact structure and reasonable design. Driven by a stepper motor, the head of the steam delivery needle can extend from the guide head at approximately 90 degrees to the target position or retract into the guide head. Steam can reach the target tissue through the steam outlet of the steam delivery needle for ablation treatment. The steam delivery position is precise, and the entry and exit of the patient's lumen is smoother. It can also reduce harm to the patient, has a low cost, can be used only once, and reduces secondary pollution.

[0042] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. An ablation steam conveying device, characterized in that: The device includes an ablation needle sheath, a guide head, a stepper motor, a lead screw, a lead screw nut seat, and a steam delivery tube. The guide head is mounted on the head end of the ablation needle sheath. One end of the output shaft of the stepper motor is connected to the lead screw and can drive it to rotate. The lead screw nut seat is movably mounted on the lead screw. The steam delivery tube is located inside the ablation needle sheath and includes a steam delivery outer sleeve, a steam delivery inner sleeve, and a steam delivery needle. The steam delivery outer sleeve is fitted over the steam delivery inner sleeve, and the steam delivery inner sleeve is mounted on the outside of and fixedly connected to the steam delivery needle. The tail end of the steam delivery inner sleeve is mounted on the lead screw. On the rod nut seat, the head end and tail end of the steam delivery needle extend out of the steam delivery outer sleeve and the steam delivery inner sleeve. The head end of the steam delivery needle is provided with a sealing needle tip. The side of the head end of the steam delivery needle is provided with several rows of steam outlet holes that connect to the inside of the steam delivery needle. The inside of the guide head is provided with a needle tip straightening part and a steam needle guide arc for guiding the steam delivery needle to change direction. The bottom of the guide head is provided with an inlet and outlet needle port that connects to its interior and is opposite to the end of the steam needle guide arc. The stepper motor can drive the steam delivery needle to move linearly, and the head end of the steam delivery needle can extend or retract inside the guide head.

2. The ablation steam conveying device according to claim 1, characterized in that: The ablation needle sheath is made of PTFE or FEP thermoplastic material.

3. The ablation steam conveying device according to claim 1, characterized in that: The outer surface of the guide head is curved, with a small head and a straight tail, and is made of transparent material.

4. The ablation steam conveying device according to claim 1, characterized in that: The steam delivery needle is made of polyetheretherketone (PEEK) material.

5. The ablation steam conveying device according to claim 1, characterized in that: The steam conveying outer sleeve is made of stainless steel.

6. The ablation steam conveying device according to claim 1, characterized in that: The steam conveying outer sleeve is provided with sealing rings at both ends of the inner steam conveying outer sleeve and between the inner steam conveying outer sleeve and the outer sleeve.

7. The ablation steam conveying device according to claim 1, characterized in that: It also includes a contact-type start switch and a stop switch, wherein the start switch is located on the starting side of the lead screw nut seat and the stop switch is located on the ending side of the lead screw nut seat, and the lead screw nut seat can contact the start switch and the stop switch respectively.

8. The ablation steam conveying device according to claim 1, characterized in that: The other end of the output shaft of the stepper motor is equipped with a manual wrench.

9. The ablation steam conveying device according to claim 1, characterized in that: The head end of the steam delivery needle is provided with three rows of steam holes, with an axial spacing of 120°, and each row of steam holes has 3-6 holes.

10. The ablation steam conveying device according to claim 1, characterized in that: The head end of the steam delivery needle is provided with several marking lines located behind the steam outlet and spaced apart.

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