Circulation filter puncture with lens assembly

Abstract

The present application discloses a circulating filtering puncture device with a lens assembly, including a puncture rod, a sheath assembly sleeved on the outside of the puncture rod, and a lens assembly, the sheath assembly including an outer tube and an inner tube, the outer tube sleeved on the outside of the inner tube to form a sandwich, the sandwich is provided with an air intake channel and a smoke exhaust channel isolated from each other, the lens assembly includes a lens and a lens carrier, the lens is fixedly mounted on the outer surface of the lens carrier, the lens carrier is movably embedded in the outer tube, and can move back and forth along the circumference of the outer tube, and the lens carrier maintains a sealed fit with the outer tube through a dynamic sealing structure. By adding a lens assembly to the circulating filtering puncture device, the present application can enable doctors to observe the conditions in the abdominal cavity in real time and intuitively in clinical medical treatment, and the surgical operation is more accurate, avoiding accidental injury to tissues in non-treatment areas of the patient.

Description

Technical Field

[0001] The invention relates to a trocar, in particular to a circulating filtering trocar with a lens assembly, belonging to the technical field of medical equipment. Background Art

[0002] At present, minimally invasive intracavitary surgical methods represented by laparoscopic surgery have been widely used in various surgeries such as gynecology and general surgery. Generally speaking, other surgical instruments of minimally invasive surgery need to enter the human body through a puncture device, but the electric knife in the puncture device will produce a large amount of smoke and water vapor when burning or electrocoagulating human tissues, which may damage the physical and mental health of medical staff on the one hand, and easily affect the vision of medical staff on the other hand. In order to overcome this problem, the applicant has proposed a puncture device with a circulating smoke exhaust function, and its structure and working principle can refer to CN109498122B. However, when the puncture device is used in clinical medicine, due to the local field of view of the laparoscope, it has great limitations for doctors in surgical operations, and it is easy to cause unnecessary damage to the tissues of non-treatment parts of the patient, so it still needs to be improved. Summary of the invention

[0003] The main purpose of the present invention is to provide a circulating filtering puncture device with a lens assembly to overcome the deficiencies in the prior art.

[0004] In order to achieve the above invention objectives, the present invention is implemented through the following technical solutions:

[0005] Some embodiments of the present invention provide a circulating filtering puncturator with a lens assembly, comprising a puncture rod, a sheath assembly sleeved on the outside of the puncture rod, and a lens assembly; the sheath assembly comprises an outer tube and an inner tube, the outer tube is sleeved on the outside of the inner tube to form an interlayer, and an air intake channel and a smoke exhaust channel isolated from each other are distributed in the interlayer, the air intake channel connects the air inlet with the air outlet, the air inlet is arranged at the head of the outer tube, the air outlet is arranged at the thin end of the outer tube, the smoke exhaust channel connects the smoking port with the smoke exhaust port, the smoking port is arranged at the thin end of the inner tube, and the smoke exhaust port is arranged at the head of the outer tube; the lens assembly comprises a lens and a lens carrier, the lens is fixedly mounted on the outer side of the lens carrier, the lens carrier is movably embedded in the outer tube, and can move back and forth along the circumference of the outer tube, and the lens carrier maintains a sealed fit with the outer tube through a dynamic sealing structure.

[0006] In one embodiment, the lens assembly further includes a driving mechanism, which is connected to a lens carrier plate and is used to drive the lens carrier plate to move back and forth along the circumference of the outer tube.

[0007] In one embodiment, the driving structure includes:

[0008] an axial flow blade, the axial flow blade being arranged on the inner side surface of the lens carrier and exposed in the air inlet passage, and the axial flow blade being driven by the airflow flowing through the air inlet passage, thereby causing the lens carrier to move in a first direction on the circumference of the outer tube; and

[0009] An elastic element is disposed between the lens carrier and the outer tube or the inner tube, and the elastic element is connected to or in contact with the lens carrier, and can drive the lens carrier to move in a second direction on the circumference of the outer tube, wherein the second direction is opposite to the first direction.

[0010] In one embodiment, the axial flow blades are integrally arranged with the lens carrier.

[0011] In one embodiment, the lens carrier includes a lens carrier body, a first extension portion and a second extension portion, the first extension portion is formed by the lens carrier body extending outwardly on both sides of the outer tube in the axial direction, and the second extension portion is formed by the lens carrier body extending outwardly on both sides of the outer tube in the circumferential direction, a first guide groove and a second guide groove are formed in the tube wall of the outer tube, the first extension portion and the second extension portion are movably embedded in the first guide groove and the second guide groove respectively, and the first extension portion and the second extension portion are respectively slidably sealed with the first guide groove and the second guide groove to form the dynamic sealing structure.

[0012] In one embodiment, there is sliding contact between the surface of the first extension portion and the groove wall of the first guide groove, and between the surface of the second extension portion and the groove wall of the second guide groove, and self-lubricating material is distributed at the sliding contact interface.

[0013] In one embodiment, a plurality of air jet holes are formed on the lens carrier plate, the plurality of air jet holes are distributed around the lens, the air jet holes are connected to the air inlet channel, and the air jet directions of the air jet holes are all directed to the lens surface.

[0014] In one embodiment, the lens assembly is mounted on the outer tube at a region adjacent to the thin end.

[0015] In one embodiment, there are two lens assemblies, which are symmetrically distributed on both sides of the outer tube.

[0016] In one embodiment, the circulating filtration puncture device with a lens assembly further comprises at least one sensor, and the sensor is mounted on the outer side of the lens carrier.

[0017] In one embodiment, the sensor is used to feedback the movement of the surgical instrument. The sensor, lens, and control valve of the air supply device are all connected to a control module. The air supply device is used to provide airflow to the air inlet channel. The control module is used to receive the sensor signal of the sensor and adjust the working state of the control valve of the air supply device accordingly, thereby regulating at least one of the gas flow, flow rate, and frequency in the air inlet channel, and then driving the lens to move synchronously according to the movement of the surgical instrument.

[0018] Compared with the prior art, the advantages of this application are at least:

[0019] (1) By adding a lens assembly to the circulating filter puncture device, doctors can observe the conditions in the abdominal cavity in real time and intuitively in clinical medicine, making surgical operations more accurate and avoiding accidental injury to tissues in non-treatment areas of the patient;

[0020] (2) By making the lens movable, a wider observation range can be obtained. In particular, by symmetrically setting two sets of movable lenses, the lens can also capture a 360° full-circle view of the abdominal cavity, so that the doctor can observe the overall condition of the abdominal cavity, further improving the accuracy and safety of surgical operations;

[0021] (3) By providing an axial flow blade or the like in the lens assembly, the lens assembly can utilize the airflow in the air inlet channel as a power source, and can move smoothly without the need for an additional motor or other driving mechanism, thereby avoiding complicating the structure of the circulating filter puncture device and significantly increasing the cost;

[0022] (4) By providing an air jet hole on the lens carrier, the airflow in the air inlet passage can be used to purge and clean the lens, thereby maintaining a clear field of view without the need for an additional lens cleaning mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a front view of a circulating filtration puncture device with a lens assembly in Example 1 of the present application;

[0024] Figure 2 is a side view of a circulating filtration puncture device with a lens assembly in Example 1 of the present application;

[0025] Figure 3 is a cross-sectional view of a lens assembly, an outer tube and an inner tube along the axial direction in Example 1 of the present application;

[0026] Figure 4 is a cross-sectional view of a lens assembly, an outer tube and an inner tube along a radial direction in Example 1 of the present application;

[0027] Figure 5 is a rear view of a lens carrier in Example 1 of the present application;

[0028] Figure 6 is a cross-sectional view of a lens assembly, an outer tube and an inner tube along the axial direction in Example 2 of the present application;

[0029] Figure 7 This is a front view of a lens assembly in Example 2 of the present application. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] Example 1

[0032] See also Figure 1-Figure 5 The basic structure of a circulating filtration puncture device with a lens assembly provided in this embodiment can refer to the puncture device of CN109498122B, that is, it also includes a puncture rod 1 and a sheath assembly 2 sleeved on the outside of the puncture rod. The sheath assembly includes an outer tube 21 and an inner tube 22. The outer tube is sleeved on the outside of the inner tube to form an interlayer, and an air intake channel 6 and a smoke exhaust channel 7 are distributed in the interlayer and isolated from each other by a partition 8. The air intake channel 6 connects the air inlet with the air outlet 211, and the air inlet is arranged at the head of the outer tube 21, and the air outlet 211 is arranged at the thin end of the outer tube 21. The smoke exhaust channel 7 connects the smoking port with the smoke exhaust port, and the smoking port is arranged at the thin end of the inner tube 22, and the smoke exhaust port is arranged at the head of the outer tube 21. The aforementioned thin end and head are respectively Figure 1 The lower part and the upper part shown. What is more special is that the circulating filtration puncture device of this embodiment also includes one or more lens assemblies. Each lens assembly includes a lens 3 and a lens carrier 4. The lens 3 is fixedly mounted on the outer surface of the lens carrier 4. The lens 3 is obviously exposed to the outside of the outer tube 21 to clearly image the environment near the tip of the puncture rod. The lens carrier 4 is movably embedded in the outer tube 21, especially in the area adjacent to the thin end of the outer tube 21, and the lens carrier 4 can move back and forth along the circumference of the outer tube 21, so that the lens 3 can be driven to move within a certain range, and a wider imaging field of view can be obtained, and under specific circumstances, specific parts in the abdominal cavity can be imaged more specifically. In addition, the lens carrier 4 maintains a sealed fit with the outer tube 21 through a dynamic sealing structure to prevent body fluids in the abdominal cavity from leaking into the interior of the puncture device.

[0033] Furthermore, the lens assembly further includes a driving mechanism, which is connected to the lens carrier 4 and is used to drive the lens carrier 4 to move back and forth along the circumference of the outer tube 21. In some cases, the driving mechanism may use an additional electric / electromagnetic driving mechanism such as a micro motor, but this may require a significant modification of the existing structure of the trocar, making the structure of the trocar more complicated, increasing the cost, and reducing the reliability.

[0034] As a more preferred solution, the aforementioned driving mechanism may include:

[0035] The axial flow blade 43 is disposed on the inner side of the lens carrier 4 and is exposed to the air inlet passage 6. The axial flow blade 43 can be moved by the air flow (the main flow direction of the air flow is as shown in FIG. Figure 3 The lens carrier plate 4 is driven by the vertical arrow in the figure to move the lens carrier plate 4 in a first direction along the circumference of the outer tube 21;

[0036] The elastic element is disposed between the lens carrier 4 and the outer tube 21 or the inner tube 22, and the elastic element is connected to or in contact with the lens carrier 4, and can drive the lens carrier 4 to move in a second direction on the circumference of the outer tube 21. The second direction is opposite to the first direction, for example, if the first direction is clockwise, the second direction is counterclockwise, and vice versa.

[0037] Among them, the axial flow blades 43 arranged on a lens carrier 4 can be one or more, and their specific structural parameters can be easily determined by technical personnel in this field based on the knowledge of fluid mechanics (refer to "Blower Handbook (2nd Edition)", edited by Xu Kuichang et al., Machinery Industry Press, published on 2011-02-01), and combined with parameters such as the weight / size of the lens assembly and the size of the air inlet channel and the flow rate / flow velocity of the air flow therein.

[0038] The elastic element may be a spring, a torsion spring, etc., which may be arranged between the lens carrier 4 and the outer tube and / or the inner tube in a conventional manner in the mechanical field. Figure 4 A spring 9 may be provided between one side of the lens carrier plate 4 and the outer tube 21. When the axial flow blade 43 is driven by the airflow in the air inlet channel 6 to move in the counterclockwise direction, the spring 9 is compressed or stretched by the force generated by the airflow, and when the airflow in the air inlet channel 6 decreases or disappears, the external force on the spring 9 decreases or disappears, and the force generated when the spring 9 recovers its deformation will push or pull the lens carrier plate 4 to move in the clockwise direction.

[0039] The driving mechanism is based on the principles of fluid mechanics and uses part of the airflow flowing through the air inlet channel and an elastic element as a power source without the need for additional power sources such as micromotors. This means that the lens can be driven to move simply and conveniently, and major changes to the structure of the puncture device can be avoided, thereby maintaining its structural stability, and the required modification cost is low.

[0040] More preferably, the axial flow blades 43 can be integrally provided with the lens carrier plate 4. For example, the two can be integrally stamped, injection molded, or cast, thereby further reducing the cost and simplifying the structure.

[0041] Furthermore, the aforementioned lens carrier 4 includes a lens carrier body, a first extension portion 41 and a second extension portion 42. The first extension portion 41 is formed by the lens carrier body extending outward on both sides of the outer tube 21 in the axial direction, and the second extension portion 42 is formed by the lens carrier body extending outward on both sides of the outer tube 21 in the circumferential direction. A first guide groove and a second guide groove are formed in the tube wall of the outer tube 21. The first extension portion 41 and the second extension portion 42 are respectively movably embedded in the first guide groove and the second guide groove, and the first extension portion 41 and the second extension portion 42 are respectively cooperated with the first guide groove and the second guide groove for sliding seals to form a dynamic sealing structure, that is, the dynamic sealing structure is a sliding sealing structure.

[0042] Preferably, there is sliding contact between the surface of the first extension portion 41 and the groove wall of the first guide groove, and between the surface of the second extension portion 42 and the groove wall of the second guide groove, and self-lubricating materials, such as self-lubricating polymer materials such as POM and PA, are distributed at the sliding contact interface. In some cases, a self-lubricating polymer coating can be coated on the surfaces of the first extension portion 41 and the second extension portion 42 and / or the groove walls of the first guide groove and the second guide groove, so that the movement of the lens assembly is smoother.

[0043] Furthermore, the aforementioned lens 3 can adopt an ultra-wide-angle lens, for example, an ultra-wide-angle lens with a viewing angle of 118° and a focusing range of 13 to 20 mm. By adopting the aforementioned design that enables the lens to move within a certain range, the overall shooting angle of the lens within its focusing imaging range can be made greater than 180°.

[0044] Preferably, there may be two lens assemblies, which are symmetrically distributed on both sides of the outer tube 21, so as to further ensure that the lenses on both sides can capture a 360° panoramic view after moving separately.

[0045] Furthermore, one or more sensors 5 can be installed on the outer side of the lens carrier 4, and the minimally invasive surgical instruments can be marked by the sensor 5. In this way, by connecting the sensor 5 to a control module, and connecting the aforementioned lens 3 and the control valve of the air supply device to the control module, the lens can be automatically moved according to the needs of the operation and work in an automatic tracking mode. The air supply device is used to provide airflow to the air inlet channel. Specifically, during the operation, after marking the minimally invasive surgical instrument with the sensor, the lens can be driven to move synchronously according to the movement of the surgical instrument fed back by the puncture device by controlling the air intake flow rate / flow velocity / frequency of the air intake channel. Of course, when adjusting the air intake flow rate / flow velocity / frequency of the air intake channel, the exhaust flow rate / flow velocity / frequency of the smoke exhaust channel can also be synchronously adjusted to keep the air pressure in the abdominal cavity within a suitable range.

[0046] Example 2

[0047] The circulating filtration puncture device with a lens assembly provided in this embodiment is further improved on the basis of the puncture device in Example 1. The improvement is as follows: Figure 6-Figure 7 A plurality of jet holes 44 are formed on the lens carrier 4. Preferably, the jet holes 44 are distributed around the lens 3, the jet holes are connected to the air inlet channel 6, and the airflow jet direction of each jet hole is directed to the surface of the lens 3. Among them, by setting the aperture of the jet hole 44 to be smaller, for example, about 1 mm or even smaller, a larger jet airflow velocity (airflow direction is as shown in FIG. 1 ) can be obtained. Figure 6 ), so that the surface of the lens 3 can be kept purged, and a clear view can always be obtained without adding an additional cleaning mechanism. Preferably, a self-cleaning coating or the like can also be provided on the surface of the lens 3.

[0048] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A circulating filtering puncture device with a lens assembly, comprising a puncture rod (1) and a sheath tube assembly (2) sleeved on the outside of the puncture rod, the sheath tube assembly comprising an outer tube (21) and an inner tube (22), the outer tube being sleeved on the outside of the inner tube to form an interlayer, an air intake channel (6) and a smoke exhaust channel (7) isolated from each other are distributed in the interlayer, the air intake channel (6) connects an air intake port with an air outlet (211), the air intake port is arranged at the head of the outer tube (21), the air outlet (211) is arranged at the thin end of the outer tube (21), the smoke exhaust channel (7) connects a smoke outlet with a smoke exhaust port, the smoke outlet is arranged at the thin end of the inner tube (22), and the smoke exhaust port is arranged at the head of the outer tube (21); characterized in that The invention also comprises a lens assembly, wherein the lens assembly comprises a lens (3), a lens carrier plate (4) and a driving mechanism, wherein the lens (3) is fixedly mounted on the outer surface of the lens carrier plate (4), the lens carrier plate (4) is movably embedded in the outer tube (21), the driving mechanism is connected to the lens carrier plate (4) and is used to drive the lens carrier plate (4) to move back and forth along the circumference of the outer tube (21), and the lens carrier plate (4) maintains a sealed fit with the outer tube (21) via a dynamic sealing structure; Wherein, the driving mechanism comprises: an axial flow blade (43), the axial flow blade (43) being arranged on the inner side surface of the lens carrier plate (4) and exposed to the air inlet passage (6), and the axial flow blade (43) being driven by the airflow flowing through the air inlet passage (6), thereby causing the lens carrier plate (4) to move in a first direction in the circumferential direction of the outer tube (21); An elastic element, wherein the elastic element is arranged between the lens carrier (4) and the outer tube (21) or the inner tube (22), and the elastic element is connected to or in contact with the lens carrier (4), and can drive the lens carrier (4) to move in a second direction along the circumference of the outer tube (21), the second direction being opposite to the first direction.

2. The circulating filtration puncture device with a lens assembly according to claim 1, characterized in that: The axial flow blades (43) are integrally arranged with the lens carrier plate (4).

3. The circulating filtration puncture device with a lens assembly according to claim 1, characterized in that: The lens carrier (4) comprises a lens carrier body, a first extension portion (41) and a second extension portion (42); the first extension portion (41) is formed by the lens carrier body extending outwardly from both sides of the outer tube (21) in the axial direction; the second extension portion (42) is formed by the lens carrier body extending outwardly from both sides of the outer tube (21) in the circumferential direction; a first guide groove and a second guide groove are formed in the tube wall of the outer tube (21); the first extension portion (41) and the second extension portion (42) are respectively movably embedded in the first guide groove and the second guide groove; and the first extension portion (41) and the second extension portion (42) are respectively slidably sealed with the first guide groove and the second guide groove to form the dynamic sealing structure.

4. The circulating filtration puncture device with a lens assembly according to claim 3, characterized in that: There is sliding contact between the surface of the first extension portion (41) and the groove wall of the first guide groove, and between the surface of the second extension portion (42) and the groove wall of the second guide groove, and self-lubricating material is distributed at the sliding contact interface.

5. The circulating filtration puncture device with a lens assembly according to claim 1, characterized in that: A plurality of jet holes are also formed on the lens carrier plate (4), the plurality of jet holes are distributed around the lens (3), the jet holes are connected to the air inlet channel (6), and the airflow jet directions of the jet holes are all directed toward the surface of the lens (3).

6. The circulating filtration puncture device with a lens assembly according to claim 1, characterized in that: The lens assembly is mounted on the outer tube (21) at a region adjacent to the thin end.

7. The circulating filtration puncture device with a lens assembly according to any one of claims 1 to 6, characterized in that: There are two lens assemblies, which are symmetrically distributed on both sides of the outer tube (21).

8. The circulating filtration puncture device with a lens assembly according to claim 1, characterized in that: It also comprises at least one sensor (5), wherein the sensor (5) is mounted on the outer side surface of the lens carrier plate (4).

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