Steam ablation needle structure

Abstract

The utility model discloses a steam ablation needle structure which comprises an ablation needle tube sheath, a guide head, a steam conveying tube, a flushing and draining tube and a flushing and draining change-over switch, and the flushing and draining change-over switch comprises a switch base and a flushing and draining change-over valve element. The flushing and draining device is compact in structure, small in diameter and capable of smoothly entering and exiting from the lumen tissue of the human body and reducing harm to the human body, water inlet and water drainage can be rapidly switched by shifting the flushing and draining change-over switch, and flushing and draining operation is more convenient. In addition, a miniature lens used for observing the state and the position of the steam conveying needle is further arranged, and the miniature lens is not used as a separating device matched with the ablation needle like a traditional endoscope, but is directly integrated at the front end of the interior of the ablation needle, so that the section of the flushing and discharging pipeline can be minimized; therefore, the cross section of the whole ablation needle is reduced, and the damage of the ablation needle to the lumen tissue of the human body is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of steam ablation instruments, and more specifically, to a steam ablation needle structure. Background Art

[0002] Steam ablation, as a surgical treatment method, has extremely high requirements for steam transmission volume, temperature and position control. Among them, the steam transmission volume cannot be too much or too little, otherwise it is easy to cause other burns, or incomplete ablation, etc., and the position accuracy is also required to be very high. During operation, the ablation needle tube needs to be inserted into the human body's lumen (such as the urethra, etc.). However, the cross-section of existing ablation needles is generally large, which can easily damage the lumen and increase the difficulty of postoperative recovery. In addition, existing ablation needles also have problems such as inconvenient flushing and drainage operations. Utility Model Content

[0003] The purpose of the present utility model is to overcome the above-mentioned defects in the prior art and to provide a steam ablation needle structure with a small diameter, which can enter and exit the human body's tubular tissue more smoothly, reduce harm to the human body, and can quickly switch between water intake and drainage by toggling the flushing and drainage switch, making flushing and drainage operations more convenient.

[0004] To achieve the above-mentioned objectives, the utility model provides a steam ablation needle structure, including an ablation needle sheath, a guide head, a steam delivery pipe, a flushing and draining pipe and a flushing and draining switching switch, wherein the guide head is installed at the head end of the ablation needle sheath, and the bottom and two sides of the guide head are respectively provided with guide head openings connected to the interior thereof, the steam delivery pipe and the flushing and draining pipe are respectively installed inside the ablation needle sheath, the head needle tip of the steam delivery pipe can extend from the guide head opening at the bottom of the guide head, the head end of the flushing and draining pipe extends into the guide head, the flushing and draining switching switch includes a switch seat and a flushing and draining switching valve core, the flushing and draining switching valve core is movably installed in the switch seat, the flushing and draining switching valve core is provided with a water inlet for connecting to a water inlet pipe and a drain outlet for connecting to a drain pipe, the switch seat is provided with a flushing and draining pipe interface connected to the tail end of the flushing and draining pipe, the flushing and draining switching valve core can slide inside the switch seat, so that the water inlet of the flushing and draining switching valve core is connected to the flushing and draining pipe interface of the switch seat or the drain outlet of the drainage switching valve core is connected to the flushing and draining pipe interface of the switch seat.

[0005] Preferably, switch push handles are provided on both sides of the flushing and drainage switching valve core.

[0006] Preferably, the water inlet of the flushing and drainage switching valve core is provided with a water inlet sealing ring, and the drain outlet of the flushing and drainage switching valve core is provided with a drain outlet sealing ring.

[0007] Preferably, the outside of the flushing and drainage pipe is sheathed with a flushing and drainage sleeve located in the ablation needle sheath, and the head end of the flushing and drainage sleeve is inserted into the interior of the guide head.

[0008] Preferably, the steam delivery pipe includes an outer steam delivery sleeve, an inner steam delivery sleeve and a steam delivery needle. The outer steam delivery sleeve is sleeved on the outside of the inner steam delivery sleeve, and the inner steam delivery sleeve is installed on the outside of the steam delivery needle and fixedly connected thereto. The head end and the tail end of the steam delivery needle both extend out of the outer steam delivery sleeve and the inner steam delivery sleeve. The head end of the steam delivery needle is provided with a sealed needle tip, and the side surface of the head end of the steam delivery needle is provided with several rows of steam outlet holes connected to the interior of the steam delivery needle.

[0009] Preferably, thermal insulation sealing rings are provided between the inner ends of the steam conveying outer sleeve and the steam conveying inner sleeve.

[0010] Preferably, a needle correction portion and a steam needle guide arc for guiding the steam delivery needle to turn are provided inside the guide head, and the end of the steam needle guide arc extends to the guide head opening at the bottom of the guide head.

[0011] Preferably, the side surface of the head end of the steam delivery needle is provided with a plurality of marking lines located behind the steam outlet and arranged at intervals.

[0012] Preferably, the steam ablation needle structure further includes a lens, which is located inside the head end of the flushing and drainage cannula, and a cable of the lens is located inside the flushing and drainage cannula.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model has a compact structure and reasonable design. The guide head is installed at the head end of the ablation needle sheath, and the steam delivery pipe and the flushing and drainage pipe are integrated inside the ablation needle sheath. The ablation needle has a small diameter and can enter and exit the human body's lumen tissue more smoothly, which can reduce damage to the human body. It can also prevent burns by flushing with saline. By toggling the flushing and drainage switching valve core of the flushing and drainage switching switch, the water inlet and drainage can be quickly switched, making the flushing and drainage operation more convenient.

[0015] 2. The utility model is provided with a micro-lens for observing the status and position of the steam delivery needle. The micro-lens is not used as a separate device in conjunction with the ablation needle like a traditional endoscope, but is directly integrated into the internal front end of the ablation needle, which can minimize the cross-section of the flushing and exhaust pipe, thereby reducing the cross-section of the entire ablation needle, thereby further reducing the damage of the ablation needle to the human lumen tissue. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic structural diagram of a steam ablation needle structure provided by an embodiment of the present utility model;

[0018] Figure 2 This is an exploded view of the steam ablation needle structure provided by an embodiment of the present utility model;

[0019] Figure 3 is a cross-sectional view of the head end of the steam ablation needle structure provided by an embodiment of the present utility model;

[0020] Figure 4 is a cross-sectional view of a guide head provided by an embodiment of the present utility model;

[0021] Figure 5 This is a partial structural cross-sectional view of a guide head provided by an embodiment of the present utility model;

[0022] Figure 6 This is a schematic structural diagram of the head end of a steam delivery needle provided in an embodiment of the utility model;

[0023] Figure 7 This is an exploded view of the flush and drain switch provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0024] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0025] Please refer to Figure 1 and Figure 2 An embodiment of the present invention provides a steam ablation needle structure, including an ablation needle sheath 1, a guide head 2, a steam delivery tube 3, a flushing and drainage pipe 4, and a flushing and drainage switching switch 5. The various components of this embodiment are described in detail below with reference to the accompanying drawings.

[0026] like Figure 3 、 Figure 4 and Figure 5As shown, the guide head 2 is mounted on the head end of the ablation needle sheath 1. The bottom of the guide head 2 is provided with a guide head opening 21a communicating with the interior thereof, and the two side surfaces of the guide head 2 are respectively provided with guide head openings 21b communicating with the interior thereof. The guide head 2 is mounted on the head end of the ablation needle sheath 1. In this embodiment, the outer surface of the guide head 2 is preferably formed of a curved surface, with a small head and a straight tail, and is made of a transparent material, so that the guide head can enter the human body lumen without causing damage.

[0027] As a preferred embodiment, the interior of the guide head 2 can also be provided with a needle correction portion 22 and a steam needle guide arc 23 for guiding the steam delivery needle of the steam delivery pipe 3 to turn, and the end of the steam needle guide arc 23 extends to the guide head opening 21a at the bottom of the guide head 2.

[0028] like Figure 1 and Figure 3 As shown, the steam delivery tube 3 is installed inside the ablation needle sheath 1 , and the tip of the head needle of the steam delivery tube 3 can extend from the guide head opening 21 a at the bottom of the guide head 2 .

[0029] Specifically, such as Figure 2 and Figure 3 As shown, the steam delivery tube 3 may include an outer steam delivery tube 31, an inner steam delivery tube 32, and a steam delivery needle 33. The outer steam delivery tube 31 is sleeved onto the exterior of the inner steam delivery tube 32, which is mounted on the exterior of the steam delivery needle 33 and fixedly connected thereto. The head and tail ends of the steam delivery needle 33 both extend out of the outer steam delivery tube 31 and the inner steam delivery tube 32. The head end of the steam delivery needle 33 is provided with a sealed needle tip, and the side surface of the head end of the steam delivery needle 33 is provided with several rows of steam outlet holes 331 that communicate with the interior of the steam delivery needle 33. The tail end of the steam delivery inner tube 32 can be transmission-connected to a needle advance and retreat drive device. When the steam delivery needle is moved, the needle advance and retreat drive device can be used to guide the steam delivery needle through the guide head at an approximately 90-degree angle into human tissue to a predetermined position. The needle advance and retreat drive device can be configured as a motor + screw, electromagnetic catapult, or spring drive device.

[0030] During specific manufacturing, the steam delivery outer sleeve 61 can be preferably configured as a stainless steel sleeve. The steam delivery needle 63 can be preferably made of polyetheretherketone (PEEK) material.

[0031] like Figure 3 As shown, thermal insulation sealing rings 34 may be provided between the inner ends of the steam delivery outer sleeve 31 and the steam delivery inner sleeve 32 .

[0032] In this embodiment, the steam delivery inner sleeve can achieve the first level of thermal insulation for the steam delivery needle, and can increase the strength of the steam delivery needle to achieve movable operation. The steam delivery outer sleeve can achieve the second level of thermal insulation for the steam delivery needle, which can prevent the steam delivery tube from scalding the human body.

[0033] like Figure 6 As shown, the side surface of the head end of the steam delivery needle 33 is provided with a plurality of marking lines 332 located behind the steam outlet and arranged at intervals.

[0034] like Figure 2 and Figure 3 As shown, the flushing and drainage tube 4 is installed inside the ablation needle sheath 1 , and the head end of the flushing and drainage tube 4 extends into the guide head 2 .

[0035] like Figure 2 and Figure 7 As shown, the flush and drain switching switch 5 may include a switch seat 51 and a flush and drain switching valve core 52. The flush and drain switching valve core 52 is movably installed in the switch seat 51. The flush and drain switching valve core 52 is provided with a water inlet 521 for connecting to the water inlet pipe and a drain outlet 522 for connecting to the drain pipe. Switch push handles 523 are respectively provided on both sides of the flush and drain switching valve core 52. The switch seat 51 is provided with a flush and drain pipe interface 511 connected to the tail end of the flush and drain pipe 4.

[0036] In order to improve the sealing between the switch seat 51 and the flushing and drainage switching valve core 52 and prevent water leakage in the flushing and drainage switching switch 5, the water inlet 521 of the flushing and drainage switching valve core 52 can also be provided with a water inlet sealing ring 53, and the drain outlet 522 of the flushing and drainage switching valve core 52 can also be provided with a drain outlet sealing ring 54. Both the water inlet sealing ring 53 and the drain outlet sealing ring 54 can contact the inner wall of the switch seat 51.

[0037] During operation, the flush / drain switching valve core 52 slides left and right within the switch base 51, causing the water inlet 521 of the flush / drain switching valve core 52 to align with the flush / drain pipe interface 511 of the switch base 51, or causing the drain outlet 522 of the drain switching valve core to align with the flush / drain pipe interface 511 of the switch base 51. By toggling the flush / drain switching switch, the user can allow saline to flow through the flush / drain pipe via the three guide openings of the guide head to cool and flush the corresponding body lumen. Alternatively, by toggling the switch to drain, the pressure within the body lumen is used to drain the fluid.

[0038] Preferably, the outside of the flushing and drainage tube 4 can also be covered with a flushing and drainage sleeve 6 located in the ablation needle sheath 1, and the head end of the flushing and drainage sleeve 6 is inserted into the inside of the guide head 2. The flushing and drainage sleeve 6 can be set as a stainless steel sleeve.

[0039] like Figure 2 and Figure 3As shown, as a further improvement of this embodiment, based on actual needs, a miniature lens 7 can be added on the basis of the above technical solution. The lens 7 is located inside the head end of the flushing and draining sleeve 6, and the cable 71 of the lens 7 is located inside the flushing and draining sleeve 6. The scale mark line of the steam delivery needle can be directly observed through the lens, thereby assisting in calculating the delivery position of the steam delivery needle tip.

[0040] The micro lens 7 of this embodiment is not used as a separate device in conjunction with the ablation needle like a traditional endoscope, but is directly integrated into the internal front end of the ablation needle, which can minimize the cross-section of the flushing and exhaust pipe, thereby reducing the cross-section of the entire ablation needle, thereby further reducing the damage of the ablation needle to the human luminal tissue.

[0041] To sum up, the utility model has a compact structure, reasonable design, small diameter, smoother entry and exit of human tubular tissue, and can reduce harm to the human body. By toggling the flushing and drainage switch, the water intake and drainage can be quickly switched, making the flushing and drainage operation more convenient.

[0042] The above embodiments are preferred implementation methods of the present invention, but the implementation methods of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A steam ablation needle structure, characterized by: The flushing and draining switching switch includes an ablation needle sheath, a guide head, a steam delivery pipe, a flushing and draining pipe and a flushing and draining switching switch, wherein the guide head is installed at the head end of the ablation needle sheath, and the bottom and two sides of the guide head are respectively provided with guide head openings connected to the interior thereof, the steam delivery pipe and the flushing and draining pipe are respectively installed inside the ablation needle sheath, the head needle tip of the steam delivery pipe can extend from the guide head opening at the bottom of the guide head, the head end of the flushing and draining pipe extends into the guide head, the flushing and draining switching switch includes a switch seat and a flushing and draining switching valve core, the flushing and draining switching valve core is movably installed in the switch seat, the flushing and draining switching valve core is provided with a water inlet for connecting to a water inlet pipe and a drain outlet for connecting to a drain pipe, the switch seat is provided with a flushing and draining pipe interface connected to the tail end of the flushing and draining pipe, the flushing and draining switching valve core can slide inside the switch seat, so that the water inlet of the flushing and draining switching valve core is connected to the flushing and draining pipe interface of the switch seat or the drain outlet of the drainage switching valve core is connected to the flushing and draining pipe interface of the switch seat.

2. The steam ablation needle structure according to claim 1, characterized in that: Switch push handles are provided on both sides of the flushing and drainage switching valve core.

3. The steam ablation needle structure according to claim 1, characterized in that: The water inlet of the flushing and drainage switching valve core is provided with a water inlet sealing ring, and the drainage outlet of the flushing and drainage switching valve core is provided with a drainage outlet sealing ring.

4. The steam ablation needle structure according to claim 1, characterized in that: The outside of the flushing and drainage pipe is sheathed with a flushing and drainage sleeve located in the ablation needle sheath, and the head end of the flushing and drainage sleeve is inserted into the interior of the guide head.

5. The steam ablation needle structure according to claim 1, characterized in that: The steam delivery pipe includes an outer steam delivery sleeve, an inner steam delivery sleeve and a steam delivery needle. The outer steam delivery sleeve is sleeved on the outside of the inner steam delivery sleeve, and the inner steam delivery sleeve is installed on the outside of the steam delivery needle and fixedly connected thereto. The head end and the tail end of the steam delivery needle both extend out of the outer steam delivery sleeve and the inner steam delivery sleeve. The head end of the steam delivery needle is provided with a blocked needle tip, and the side surface of the head end of the steam delivery needle is provided with several rows of steam outlet holes connected to the interior of the steam delivery needle.

6. The steam ablation needle structure according to claim 5, characterized in that: Thermal insulation sealing rings are respectively provided between the inner ends of the steam conveying outer sleeve and the steam conveying inner sleeve.

7. The steam ablation needle structure according to claim 5, characterized in that: The guide head is provided with a needle correction portion and a steam needle guide arc for guiding the steam delivery needle to turn, and the end of the steam needle guide arc extends to the guide head opening at the bottom of the guide head.

8. The steam ablation needle structure according to claim 5, characterized in that: The side surface of the head end of the steam delivery needle is provided with a plurality of marking lines which are located behind the steam outlet and are arranged at intervals.

9. The steam ablation needle structure according to claim 4, characterized in that: The utility model further comprises a lens, wherein the lens is located inside the head end of the flushing and draining sleeve, and a cable of the lens is located inside the flushing and draining sleeve.

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