Hysteroscope insertion mechanism

Abstract

The utility model discloses a hysteroscope insertion mechanism which comprises an intubation tube assembly and a lens assembly installed at one end of the intubation tube assembly, the intubation tube assembly comprises an outer tube and an inner tube which is located in the outer tube and extends in the axial direction, and a first instrument channel for a surgical instrument to penetrate through is formed in the inner tube. The far end of the inner tube is provided with an insertion end head, the insertion end head is fixedly connected with the outer tube, a second instrument channel communicated with the first instrument channel is formed in the insertion end head, the insertion end head is made of an elastic soft material, the lens assembly is arranged on the insertion end head, and the lens assembly is arranged on the outer tube. And an opening is formed in the outer wall of the insertion end. The surgical instrument fixing device can be suitable for various surgical instruments of different models, the surgical cost is reduced, the surgical process is simplified, and the risk of secondary injury to a patient is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of hysteroscopes, in particular to a hysteroscope insertion mechanism. Background Art

[0002] In hysteroscopic surgery, non-dilation procedures are gaining increasing attention to avoid uterine damage caused by cervical dilation while also reducing patient pain and postoperative complications. This requires the insertion portion of the hysteroscope to be sufficiently thin and flexible to allow smooth entry into the uterine cavity without dilating the cervix. However, current hysteroscopes, while meeting the non-dilation requirement, also need to ensure sufficient space for the optical imaging device, light source, and surgical instrument channels, placing extremely high demands on product design and manufacturing processes. On the one hand, high-performance optical and electronic components must be integrated within the limited space to ensure uncompromised imaging quality; on the other hand, ensuring unobstructed surgical instrument channels and flexible instrument operation requires continuous research and development of new materials and manufacturing technologies to achieve product miniaturization, refinement, and functional integration.

[0003] A hysteroscope includes an insertion portion, which includes a cannula that extends into the uterine cavity. The cannula has an instrument channel through which surgical instruments are passed into the uterine cavity for surgical operation. Because the distal end of the cannula is provided with a camera and a light source, the radial space of the instrument channel at the distal end of the cannula is narrowed. Therefore, in order to successfully extend the surgical instrument from the distal end of the instrument channel, the existing technical means generally increase the outer diameter of the cannula to increase the radial space of the instrument channel at the distal end of the cannula. However, increasing the outer diameter of the cannula increases the patient's pain. On the other hand, due to the large number of surgical instruments, the doctor needs to select the appropriate surgical instrument based on the cause of the disease. If a smaller instrument is selected, the small instrument will easily shake in the larger radial space of the instrument channel, making it impossible to accurately locate the lesion. Therefore, in order to accommodate different types of surgical instruments, a variety of cannulae with different inner diameter channels are made. Since some lesions require surgical instruments of different sizes, the hysteroscope has to replace the cannula with the corresponding inner diameter channel, which increases the cost of the operation and makes the surgical process cumbersome. Moreover, this method requires reinserting the cannula into the uterine cavity, which poses a risk of secondary injury to the patient. Summary of the Invention

[0004] In response to the deficiencies of the existing technology, the present invention provides a hysteroscope insertion mechanism that can be used with a variety of different types of surgical instruments, thereby reducing surgical costs, simplifying the surgical process, and avoiding the risk of secondary injury to the patient.

[0005] The utility model is achieved through the following technical solutions:

[0006] A hysteroscope insertion mechanism includes an insertion tube assembly and a lens assembly mounted at one end of the insertion tube assembly. The insertion tube assembly includes an outer tube and an inner tube located inside the outer tube and extending axially. A first instrument channel for surgical instruments to pass through is formed inside the inner tube. An insertion tip is provided at the distal end of the inner tube. The insertion tip is fixedly connected to the outer tube and a second instrument channel is formed inside the insertion tip and communicates with the first instrument channel.

[0007] The insertion end is made of a soft elastic material, and a first step portion is provided on the outer circumference of the insertion end in a radially outward direction. A second step portion is provided on the outer circumference of the first step portion in a radially outward direction. The outer circumference of the first step portion abuts against the inner circumference of the outer tube, and the cross section of the outer tube abuts against the second step portion.

[0008] The lens assembly is arranged on the insertion end head, and an opening is formed on the outer wall of the insertion end head.

[0009] Furthermore, the axial direction of the opening is consistent with the axial direction of the insertion end, and one end of the opening extends to the distal end surface of the insertion end.

[0010] Furthermore, the opening is formed on an outer wall of the insertion end facing away from the lens assembly.

[0011] Furthermore, when the opening is in a closed state, the opening is in a linear shape.

[0012] Furthermore, a cross-section of a portion of the second instrument channel close to the lens assembly is elliptical.

[0013] Furthermore, the lens assembly is tilted along the entry direction of the surgical instrument toward a direction close to the surgical instrument.

[0014] Furthermore, a water outlet is formed on the insertion end.

[0015] Furthermore, a first step portion is provided on the outer circumferential surface of the insertion end protruding radially outward, and a second step portion is provided on the outer circumferential surface of the first step portion protruding radially outward. The outer circumferential surface of the first step portion abuts the inner circumferential surface of the outer tube, and the cross-section of the outer tube abuts the second step portion.

[0016] Furthermore, an assembly groove is formed inwardly on the inner peripheral wall forming the second instrument channel, the inner tube is accommodated in the assembly groove, and the distal end surface of the inner tube abuts against the bottom wall of the assembly groove.

[0017] Furthermore, a fracture is formed at one end of the insertion end close to the inner tube, and the fracture is located radially outside the assembly groove to expose at least a portion of the inner tube located in the assembly groove.

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] In the present application, the opening of the hysteroscope insertion mechanism is in a closed state in the initial state. When the surgical instrument passes through the first instrument channel and the second instrument channel in sequence and reaches the opening, the insertion end is squeezed by the surgical instrument and the opening is turned into an open state, thereby increasing the diameter of the instrument channel and allowing large-sized instruments to pass smoothly. In addition, at this time, the insertion end can pre-tighten the surgical instrument due to its own elasticity, preventing the surgical instrument from shaking in the instrument channel, ensuring that the surgical instrument accurately locates the lesion position, and ensuring the safety of the operation; when the surgical instrument is pulled out, the insertion end returns to its original state due to the elasticity of its own soft material, and the opening automatically returns to a closed state. The hysteroscope insertion mechanism can be applicable to a variety of different types of surgical instruments. The entire surgical process does not require the replacement of the hysteroscope's cannula assembly, which reduces the surgical cost, simplifies the surgical process, and avoids the risk of secondary injury to the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the hysteroscope insertion mechanism;

[0021] Figure 2 A cross-sectional view of the hysteroscope insertion mechanism during insertion of surgical instruments;

[0022] Figure 3 is a cross-sectional view of the hysteroscope insertion mechanism when no surgical instrument is inserted;

[0023] Figure 4 Schematic diagram of the hysteroscope insertion mechanism in the opening closed state;

[0024] Figure 5 Schematic diagram of the hysteroscope insertion mechanism with the opening open;

[0025] Figure 6 This is the main view of the hysteroscope insertion mechanism;

[0026] Figure 7 for Figure 6 Cross-sectional view along AA;

[0027] Figure 8 A cross-sectional view of the hysteroscope insertion mechanism.

[0028] 100, cannula assembly; 110, outer tube; 111, cross section; 120, inner tube; 1200, distal end face; 121, first instrument channel; 130, insertion end; 1300, distal end face; 131, second instrument channel; 1310, inner wall; 1311, assembly groove; 1312, bottom wall; 132, opening; 133, water outlet; 134, fracture; 140, first step portion; 150, second step portion; 200, lens assembly; 300, surgical instrument. DETAILED DESCRIPTION

[0029] The following is a further non-restrictive detailed description of the technical solution of the utility model in conjunction with the preferred embodiments and the accompanying drawings. In the description of the utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the utility model, and cannot be understood as limiting the utility model.

[0030] like Figure 1-Figure 5 As shown, a hysteroscope insertion mechanism according to one embodiment of the present invention comprises an intubation assembly 100 and a lens assembly 200 mounted at one end of the intubation assembly 100. For ease of description, in the following embodiments, the end of the intubation assembly 100 close to the operator is defined as the proximal end, and the end of the intubation assembly 100 away from the operator is defined as the distal end. The operator is usually a doctor. Based on this, Figure 2 In the accompanying drawings shown, the left side of the paper is the proximal end and the right side of the paper is the distal end; when the surgical instrument 300 is inserted into the cannula assembly 100, the forward insertion direction of the surgical instrument 300 is also the direction of insertion toward the distal end, so the distal end is also the front end or head end.

[0031] like Figure 1-Figure 5As shown, the cannula assembly 100 includes an outer tube 110 and an inner tube 120 located inside the outer tube 110 and extending axially. A first instrument channel 121 for the surgical instrument 300 to pass through is formed inside the inner tube 120. An insertion end 130 is provided at the distal end of the inner tube 120. The insertion end 130 is fixedly connected to the outer tube 110 and a second instrument channel 131 communicating with the first instrument channel 121 is formed inside the insertion end 130. The insertion end 130 is made of a soft elastic material. The lens assembly 200 is provided on the insertion end 130, and an opening 132 is provided on the outer wall of the insertion end 130. The opening 132 passes through the outer wall of the insertion end 130, wherein the opening 132 includes an open state and a closed state. In the initial state, reference Figure 4 , the opening 132 is in a closed state. When the surgical instrument 300 passes through the first instrument channel 121 and the second instrument channel 131 in sequence and reaches the opening 132, Figure 5 The insertion end 130 is squeezed by the surgical instrument 300, causing the opening 132 to open, allowing large-sized instruments to pass smoothly; when the surgical instrument 300 is pulled out, the insertion end 130 returns to its original state due to the elasticity of its own soft material, and the opening 132 automatically returns to a closed state, and the insertion into the uterine cavity through the uterine cavity opening will not cause damage to the uterine cavity opening.

[0032] like Figure 4 As shown, in this embodiment, when the opening 132 is in a closed state, the opening 132 is in a linear shape.

[0033] In this embodiment, the insertion tip 130 is made of a flexible and elastic material, such as silicone, PVC, etc. The soft material will not damage the uterine cavity arm or uterine cavity opening when inserted into the uterine cavity, making the operation easier and more comfortable for the doctor.

[0034] like Figure 4 As shown, in one embodiment of the present invention, the axial direction of the opening 132 is consistent with the axial direction of the insertion tip 130, and one end of the opening 132 extends to the distal end surface 1300 of the insertion tip 130. The design of the opening 132 ensures smooth entry and exit of surgical instruments 300 of various sizes, eliminating the need for frequent replacement of cannulas with different inner diameters, thereby reducing surgical risks.

[0035] In one embodiment of the present invention, the opening 132 is formed on an outer wall of the insertion head 130 facing away from the lens assembly 200 .

[0036] In this embodiment, Figure 3As shown, the lens assembly 200 is tilted toward the surgical instrument 300 along its entry direction. Specifically, the lens and lens light in the lens assembly 200 are mounted at the front end of the insertion tip 130 and form a certain angle with the axis of the insertion tip 130. This angle is the viewing angle. The increase in the viewing angle expands the surgeon's field of view during surgery, allowing the surgeon to locate the lesion more quickly and effectively.

[0037] In this embodiment, reference Figure 6 and Figure 7 The cross-section of the portion of the second instrument channel 131 near the lens assembly 200 is elliptical. For example, according to the normal design, the insertion end 130 with an outer diameter of 5mm can only allow a 2mm instrument to pass through. The present application cleverly uses the elasticity and softness of the material of the insertion end 130 itself, so that when the surgical instrument 300 passes through, the opening 132 opens, and when the surgical instrument 300 is pulled out, the opening 132 closes. During uterine surgery, the insertion part keeps the front end shape less than 5mm when entering and exiting the uterine cavity, and does not dilate the uterus. It is suitable for surgical instruments 300 of various sizes. The entire surgical process does not require the replacement of the cannula assembly of the hysteroscope, which reduces the cost of the operation, simplifies the surgical process, and avoids the risk of secondary injury to the patient. The viewing angle of the lens is the same as the angle at which the surgical instrument 300 enters, which makes it simple and convenient for the doctor to observe, and the insertion part increases the doctor's field of view when the entire part rotates. The overall operation is simple and low-cost.

[0038] A water outlet 133 is also formed on the insertion end 130 .

[0039] In this embodiment, Figure 8 As shown, the insertion end 130 is fixedly connected to the outer tube 110 by glue, and in order to improve the stability of the structure of the insertion end 130, a first step portion 140 is provided on the outer circumferential surface of the insertion end 130 and protrudes radially outward. A second step portion 150 is provided on the outer circumferential surface of the first step portion 140 and protrudes radially outward. The outer circumferential surface of the first step portion 140 abuts against the inner circumferential surface of the outer tube 110, and the cross-section 111 of the outer tube 110 abuts against the second step portion 150. This cross-section 111 is the matching surface between the outer tube 110 and the insertion end 130.

[0040] Furthermore, a mounting groove 1311 is formed inwardly on the inner peripheral wall 1310 forming the second instrument channel 131. The inner tube 120 is accommodated in the mounting groove 1311, and the distal end surface 1200 of the inner tube 120 abuts against the bottom wall 1312 of the mounting groove 1311. Furthermore, because the insertion tip 130 is made of a resilient, flexible material, the inner peripheral wall 1310 expands slightly when the inner tube 120 is inserted into the mounting groove 1311, ensuring a tight fit between the inner tube 120 and the mounting groove 1311. This further enhances the stability of the overall structure, reduces shaking of the instrument during surgery, and improves the precision of the operation.

[0041] To facilitate installation of the inner tube 120 , a break 134 is formed at one end of the insertion end 130 close to the inner tube 120 . The break 134 is located radially outside the assembly groove 1311 to expose at least a portion of the inner tube 120 in the assembly groove 1311 .

[0042] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A hysteroscope insertion mechanism, comprising an intubation assembly (100) and a lens assembly (200) mounted at one end of the intubation assembly (100), wherein the intubation assembly (100) comprises an outer tube (110) and an inner tube (120) located inside the outer tube (110) and extending axially, wherein a first instrument channel (121) for a surgical instrument (300) to pass through is formed inside the inner tube (120), and wherein: An insertion end (130) is provided at the distal end of the inner tube (120), the insertion end (130) is fixedly connected to the outer tube (110), and a second instrument channel (131) communicating with the first instrument channel (121) is formed inside the insertion end (130); The insert end (130) is made of a soft elastic material, and a first step portion (140) is provided on the outer circumference of the insert end (130) and protrudes radially outward. A second step portion (150) is provided on the outer circumference of the first step portion (140) and protrudes radially outward. The outer circumference of the first step portion (140) abuts against the inner circumference of the outer tube (110), and the cross section (111) of the outer tube (110) abuts against the second step portion (150). The lens assembly (200) is arranged on the insertion end (130), and an opening (132) is provided on the outer wall of the insertion end (130).

2. The hysteroscope insertion mechanism according to claim 1, characterized in that: The axial direction of the opening (132) is consistent with the axial direction of the insertion end (130), and one end of the opening (132) extends to the distal end surface (1300) of the insertion end (130).

3. The hysteroscope insertion mechanism according to claim 1, characterized in that: The opening (132) is formed on the outer wall of the insertion end (130) on a side facing away from the lens assembly (200).

4. The hysteroscope insertion mechanism according to claim 1, characterized in that: When the opening (132) is in a closed state, the opening (132) is in a linear shape.

5. The hysteroscope insertion mechanism according to claim 1, characterized in that: The cross section of the portion of the second instrument channel (131) close to the lens assembly (200) is elliptical.

6. The hysteroscope insertion mechanism according to claim 1, characterized in that: The lens assembly (200) is tilted along the entry direction of the surgical instrument (300) toward a direction close to the surgical instrument (300).

7. The hysteroscope insertion mechanism according to claim 1, characterized in that: A water outlet (133) is also formed on the insertion end (130).

8. The hysteroscope insertion mechanism according to claim 1, characterized in that: An assembly groove (1311) is formed inwardly on the inner peripheral wall (1310) forming the second instrument channel (131), the inner tube (120) is accommodated in the assembly groove (1311), and the distal end surface (1200) of the inner tube (120) abuts against the bottom wall (1312) of the assembly groove (1311).

9. The hysteroscope insertion mechanism according to claim 8, characterized in that: An end of the insertion end (130) close to the inner tube (120) is provided with a fracture (134), and the fracture (134) is located radially outside the assembly groove (1311) to expose at least a portion of the inner tube (120) located in the assembly groove (1311).

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