Single hole puncture device

Abstract

This invention discloses a single-hole puncture device, including a first sealing body, an incision protective sleeve, and an adjustable sealing structure. The adjustable sealing structure includes: a hollow connector comprising a coaxial multi-stage radially extending structure; at least two snap-fit ​​members, each snap-fit ​​member engaging with at least one radially extending structure and forming a second sealing body with the connector; and an adjusting fixing member, which is a collar member and fits against the second sealing body. The first sealing body passes through the adjusting fixing member, and its outer periphery partially forms a fixation with the adjusting fixing member. The adjusting fixing member and the second sealing body are configured to be separable. When the adjusting fixing member is separated from the second sealing body, the adjusting fixing member is adjusted to select one of multiple preset positions for the fixing position of the adjusting fixing member and the second sealing body. This ensures the sealing effect between the connecting structures of the puncture device is always maintained when the sealing body is rotated, and improves the existing two-hand adjustment method to one-hand adjustment.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to a single-port trocar used in pneumoperitoneum surgery in conjunction with a pneumoperitoneum machine. Background Technology

[0002] Laparoscopic surgery requires an incision in the patient's abdomen, and then an insufflation machine is used to inflate the abdomen to create a pressure chamber, which is commonly referred to as pneumoperitoneum. The establishment of pneumoperitoneum provides the necessary space for laparoscopic surgery.

[0003] During laparoscopic surgery, additional instruments are needed to support and maintain the pneumoperitoneum established by the pneumoperitoneum machine. Under current technology, a surgical channel is established within the pneumoperitoneum. The function of the surgical channel is to use the incision in the patient's abdomen as the operating surface, and to create a channel in the vertical direction of the operating surface for the insertion and movement of surgical instruments (such as scalpel forceps, surgical scissors, etc.). This device is also known as a single-port trocar.

[0004] Commonly seen multi-channel single-port trocars are mostly of a double-layer structure. This includes a sealing body that forms multiple instrument channels, and an incision protector sleeve placed on the operating surface and integrated with the sealing body. In use, the incision protector sleeve is pressed tightly and pushed into the incision in the patient's abdomen, allowing the insertion ring of the sleeve to regain its elastic deformation and thus lock into place against the inner wall of the incision. Then, the upper ring of the incision protector sleeve is pinched to roll it inward. As the channel of the protector sleeve shortens, the radial force of the channel increases until the upper ring of the incision protector sleeve is fully expanded, forming an upright and stable hollow channel above the incision in the patient's abdomen. Next, the sealing body and the upper ring of the incision protector sleeve are fixed in place, completing the intraoperative configuration of the single-port trocar. During the surgery, according to the surgical requirements, the necessary instruments are inserted through the corresponding-sized instrument channels on the sealing body, with the operating end of the instrument extending onto the operating surface to perform the procedure.

[0005] The sealing body typically contains four instrument channels, divided into two groups with different opening sizes and channel specifications. During surgery, different surgical instruments can be simultaneously placed in multiple instrument channels and operated on concurrently on the operating surface. However, long-term practice has shown that because the positions of the instrument channels on the sealing body are relatively fixed, the movable range of instruments extending through the channels to the operating surface often fails to cover the entire operating surface. An easily conceivable improvement is to add a rotatable structure at the junction of the sealing body and the incision sheath, thereby rotating the instrument channels during surgery to adjust the contact position between the instruments within the channels and the operating surface. For example, Chinese invention patent CN 209404894U discloses a combined single-port trocar. In this trocar, a stepped surface is provided between operating platform one and operating platform two, allowing the instrument channel to be adjusted to various angles as needed during surgery, eliminating the need for the surgeon to adjust their body position. Another example is Chinese invention patent CN 217285991U, which discloses a rotating single-port trocar. This structure includes a rotating connecting component between the incision protective sleeve and the flexible sealing cover. One end of the rotating connecting component is connected to the incision protective sleeve, and the other end is connected to the flexible sealing cover. The two ends of the rotating connecting component are axially fixed and circumferentially rotating. It is evident that by adding a rotating structure, the technical problems of insufficient instrument adjustment and rotation angle can be solved to some extent.

[0006] However, existing rotatable structures still have the following problems:

[0007] 1) In the combined single-port trocar structure, as described in announcement number CN 209404894 U, the two operating platforms are rotatably fastened together, and the seal between the two operating platforms is achieved by the upper hook of the snap-fit ​​structure engaging with the slot. However, there are strict requirements for the airtightness of the internal channel of the single-port trocar during surgery, and the sliding connection between the operating platforms and the engagement of the snap-fit ​​structure cannot guarantee the sealing requirements of this structure during adjustment. Similarly, in the rotating single-port trocar structure, as described in announcement number CN 217285991 U, the circumferential rotation of the rotating connecting component is simultaneously affected by the sealing structure between it and the incision protective sleeve and the flexible sealing cover, causing seal failure.

[0008] 2) Since the displacement of the instrument in the channel and on the operating surface requires a certain degree of accuracy, the rotation adjustment range of the rotating structure should not be too large or too small. However, under the existing structure, the rotation action between the rotating structure and the double-layer structure of the puncture device lacks a control or limiting mechanism, which makes the rotating structure prone to over-rotation during adjustment, thus causing the instrument to be misaligned in the book.

[0009] 3) In addition to sealing and adjustment accuracy issues, another problem is that, even with the introduction of a rotating structure to allow for rotatable adjustment between the sealing body and the incision protector, the ends of multiple instruments that can be inserted through the channel of the sealing body are still prone to collisions during intraoperative manipulation or rotational adjustment, a phenomenon commonly referred to as the "chopstick effect." This restricts the movement and adjustment of instruments within the surgical channel to some extent.

[0010] Therefore, a new improvement should be provided to solve the aforementioned technical problems of multi-channel single-port puncture devices. Summary of the Invention

[0011] In view of the shortcomings of the prior art, the present invention provides a single-hole puncture device that can solve at least one of the above-mentioned technical problems.

[0012] To solve the above technical problems, the present invention provides a single-port trocar, comprising a first sealing body forming multiple instrument channels, an incision protective sleeve, and an adjustable sealing structure between the first sealing body and the incision protective sleeve. The single-port trocar forms an internal through-structure from the first sealing body to the incision protective sleeve, and the first sealing body is axially rotatable. The adjustable sealing structure is a combined splice component forming internal channels, comprising: a connector, which is a hollow component containing a coaxial multi-stage radially extending structure; the sleeve end of the first sealing body engages with the connector, allowing communication between the connector and the inner cavity of the first sealing body; and at least two snap-fit ​​components, each snap-fit ​​component in… The inner through-structure members are radially connected to each other and engage with at least one radially extending structure of the connector to form a second sealing body with the connector; an adjusting fastener is a collar extending in the same direction as the inner through-structure members and fitting with the second sealing body, the first sealing body passes through the adjusting fastener, and its outer periphery is partially fixed with the adjusting fastener, and the adjusting fastener and the second sealing body are configured to be separable, wherein when the adjusting fastener is separated from the second sealing body, the adjusting fastener is adjusted to select one of a plurality of preset positions for the fixing position of the adjusting fastener and the second sealing body.

[0013] In a preferred embodiment of the present invention, the snap-fit ​​component is an arc-shaped component, the inner arc edge of its concave body extends radially to form a protrusion, the snap-fit ​​components are joined together to form an open component, the bottom of the open component has a through hole formed by splicing the protrusions, the adaptation between the snap-fit ​​component and the radial extension structure is such that one radial extension structure of the connector is snapped into the open component, and the protrusion of each snap-fit ​​component is inserted between two adjacent radial extension structures.

[0014] As another preferred embodiment of this solution, the snap-fit ​​component is a hollow arc-shaped component with an internal storage space and an insertion port on the inner arc side of the snap-fit ​​component. The insertion port extends radially to form a protrusion on one side. The snap-fit ​​components are mated together to form a closed component with an opening. The adaptation between the snap-fit ​​component and the radially extended structure is such that one radially extended structure of the connector is housed in the inner cavity of the closed component.

[0015] As a further preferred embodiment of this solution, the connector is a through-hole component. The multi-stage radial extension structure of the connector includes at least a first-stage structure for engaging with the snap-fit ​​component and a second-stage structure for fixing with the cut-out protective sleeve. The first-stage structure and the second-stage structure are connected by a connecting part. The sleeve end of the first sealing body is fitted with the first-stage structure, and the connecting ring of the cut-out protective sleeve is fitted with the second-stage structure to form an interference fit.

[0016] As a further preferred embodiment of this solution, a sealing ring is fitted onto the second-level structure, and the connecting ring of the cut protective sleeve is fitted onto the sealing ring, forming an interference fit with the second-level structure.

[0017] As a further preferred embodiment of this solution, the docking between the snap-fit ​​components is configured to be formed by the interlocking of the snap-fit ​​hook structure and the snap-fit ​​structure on each snap-fit ​​component, wherein the snap-fit ​​component forms a snap-fit ​​structure or a snap-fit ​​structure at both ends of its arc-shaped extension direction; or, on any snap-fit ​​component, a snap-fit ​​structure is formed at one end of its extension direction and a snap-fit ​​structure is formed at the other end.

[0018] As a further preferred embodiment of this solution, the docking between the snap-fit ​​components is configured such that the hook structure and the latch structure formed at both ends of the protrusion of each snap-fit ​​component interlock with each other, wherein the protrusion is located at both ends in its arc-shaped extension direction, and both ends form a hook structure or a latch structure, or, on any snap-fit ​​component, a hook structure is formed at one end of the two ends in the extension direction of the protrusion, and a latch structure is formed at the other end.

[0019] Preferably, the adjusting fastener includes a sleeve portion that fits with the first sealing body and an annular portion that fits with the second sealing body. The sleeve portion and the annular portion are joined to form a platform surface. The adjusting fastener and the first sealing body are fitted together by a connecting post made of soft material passing through a connecting hole. The adjusting fastener and the second sealing body are fixed and limited by a positioning post passing through a positioning hole.

[0020] In a further preferred embodiment, the first sealing body is a hemispherical part made of soft material, including a spherical end and a sleeve end, and a tension portion is formed between the spherical end and the sleeve end. When the adjusting and fixing member is separated from the second sealing body, the tension portion generates redundant deformation, and the adjusting and fixing structure rotates to drive the first sealing body to rotate in the same direction.

[0021] As a further preferred embodiment of this solution, the annular portion of the adjusting fastener is provided with a plurality of through positioning holes, and at least one positioning post adapted to the positioning hole is formed on the snap-fit ​​member. When adjusting the adjusting fastener to select the fixed position of the adjusting fastener and the second sealing body, at least one positioning post is inserted into at least one positioning hole so that the adjusting fastener and the second sealing body are fixedly limited.

[0022] In a further preferred embodiment, at least one positioning post is formed on the annular portion of the adjusting fastener, and a plurality of through positioning holes are formed along the outer arc edge of the snap-fit ​​member. When adjusting the adjusting fastener to select the fixed position of the adjusting fastener and the second sealing body, at least one positioning post is inserted into at least one positioning hole so that the adjusting fastener and the second sealing body are fixedly limited.

[0023] In a preferred embodiment of this solution, the instrument channel is located at the spherical end of the first sealing body, including a plurality of first instrument channels located at the top of the spherical surface and extending in the same direction as the axial direction of the first sealing body, and at least one second instrument channel located on the side of the spherical surface. The second instrument channel extends obliquely relative to the axial direction of the first sealing body and is disposed close to the stretching portion. The diameters of the first instrument channels and the second instrument channels may be the same or different.

[0024] Due to the adoption of the above technical solutions, the present invention has the following beneficial technical effects compared with the prior art:

[0025] 1. To improve the sealing effect during the rotation and adjustment process of the single-hole trocar, an adjustable sealing structure is added between the first sealing body at the top of the trocar and the protective sleeve at the bottom incision. The adjustable sealing structure is composed of multiple components spliced ​​together. Specifically, multiple snap-fit ​​parts engage with the central connecting part, and then the annular adjusting fixing part is fitted with the first sealing body and partially fixed. The sleeve end of the first sealing body is fitted with the connecting part. The adjusting fixing part and the snap-fit ​​parts are detachably fixed. Thus, by releasing the fixing between the adjusting fixing part and the snap-fit ​​parts, the first sealing body and the adjusting fixing part can be adjusted axially synchronously. In this way, the sealing effect of all parts of the trocar can be guaranteed while the sealing body of the single-hole trocar is adjusted.

[0026] 2. The snap-fit ​​component and the adjusting and fixing component are fixed in position by fitting or inserting into the positioning hole. The snap-fit ​​component and the adjusting and fixing component include at least one positioning hole and at least one positioning post. In this way, by selecting different positioning posts corresponding to the positioning holes, multiple limiting positions can be achieved between the snap-fit ​​component and the adjusting and fixing component. When the adjusting and fixing component is separated from the snap-fit ​​component, the adjusting and fixing component can drive the first sealing body to rotate. According to the needs of the instrument operation, the first sealing body can be rotated to a specific position and then fixed in position by the positioning hole post.

[0027] 3. Referring to the structure cited in the background art, the rotating component in the existing single-port trocar structure requires both hands to release the engagement between the latches and hooks during actual rotation adjustment, or to break or release the connection between the rotating component and the flexible sealing sleeve and / or the incision protective sleeve. On the one hand, this obviously affects the sealing effect of the trocar and may contaminate the pneumoperitoneum. On the other hand, most of the above operations require both hands to complete, making the adjustment method inconvenient and easily causing mutual collisions between instruments left in the instrument channel, exacerbating the chopstick effect. In contrast to the existing structure and trocar adjustment method, in this solution, since the adjustment fixation component and the first sealing body are partially fixed and linked, a quick adjustment can be achieved with one hand during the operation.

[0028] 4. In the existing structure, the top of the flexible seal forms a transparent flat surface, on which multiple instrument channels are located. During surgery, when instruments are simultaneously inserted into multiple instrument channels, it is desirable to minimize collisions between the instrument ends and the operating surface. However, even though the extension direction of each instrument channel in the existing structure maintains a certain angle of inclination with the flat surface, it is still difficult to avoid collisions between the instrument ends during rotational adjustments. Furthermore, if the inclination angle of the instrument channels is increased to avoid collisions, it is impossible to guarantee that the displacement of the instrument ends on the operating surface can cover the entire operating surface as much as possible. Therefore, in this solution, based on the aforementioned structural improvements, the flexible seal is set into a hemispherical shape, with instrument channels formed at the top and sides of the spherical surface. This increases the range of instrument travel on the operating surface, especially the instrument channels on the sides, which can achieve fine-tuning of position in multiple directions. Attached Figure Description

[0029] Figure 1 The diagram illustrates the three-dimensional structure of the single-hole puncture device according to a preferred embodiment of the present invention.

[0030] Figure 2 For illustration purposes, it shows Figure 1 The three-dimensional structure of the adjustable sealing structure in the single-hole puncture device shown;

[0031] Figure 3 For illustration purposes, it shows Figure 2The bottom structure of the adjustable sealing structure is shown.

[0032] Figure 4 This is an exploded view showing the exploded structure of an adjustable sealing structure in a preferred embodiment of the present invention;

[0033] Figure 5 For illustration purposes, it shows Figure 4 The structure of the connector shown;

[0034] Figure 6 This is a side view, showing Figure 6 The side view of the connector shown;

[0035] Figure 7 This is a cross-sectional view showing the cross-sectional structure of the adjustable sealing structure and the first sealing body sleeve portion in the preferred embodiment;

[0036] Figure 8 For illustration purposes, it shows Figure 4 The main view structure of the first snap-fit ​​component shown;

[0037] Figure 9 For illustration purposes, it shows Figure 4 The main view structure of the second connector shown;

[0038] Figure 10 For illustration purposes, it shows Figure 4 The structure of the adjusting fastener 204 shown;

[0039] Figure 11 The diagram shows the state in which the first sealing body and the adjusting fastener are fitted together.

[0040] Figure 12 This is an exploded view showing the exploded structure of another preferred embodiment of the present invention.

[0041] Figure 13 For illustration purposes, it shows Figure 12 The structure of the connector in the preferred embodiment shown;

[0042] Figure 14 For illustration purposes, it shows Figure 12 The structure of the first snap-fit ​​component shown;

[0043] Figure 15 For illustration purposes, it shows Figure 12 The structure of the second snap-fit ​​component shown. Detailed Implementation

[0044] In laparoscopic surgery, the internal channel of a single-port trocar is connected to the pneumoperitoneum to form a sealed surgical channel. While existing single-port trocars can adjust the position of the flexible seal at the top of the trocar by rotating the assembly, thus changing the position of the instrument's end on the operating surface after insertion into the seal, current products cannot simultaneously maintain a tight seal between the internal channel of the trocar and the incision protector during adjustment. This is because existing designs often tightly fit the flexible seal, incision protector, and rotating assembly to ensure an overall seal between the internal channel of the trocar and the pneumoperitoneum; therefore, when the flexible seal needs to be adjusted by rotation, the tight connection between these components must be released.

[0045] Another reason is that in the existing design, in order to take into account the adjustability of the flexible sealing body and the airtightness during the adjustment process, the structure of the rotating adjustment component is often configured to be tightly fixed. This leads to the operator having to hold different positions of the component with both hands during the operation to release its tight fit, making the adjustment method complicated. At the same time, the method of adjusting with both hands inevitably leads to the need to remove the instruments stuck in the instrument channel during the adjustment, otherwise it will cause accidental contact or collision of the ends of the instruments in the channel.

[0046] In view of this, the preferred embodiment of the present invention improves upon the prior art as follows:

[0047] 1) A novel rotary adjustment assembly is provided, comprising: a portion for maintaining a tight connection of a flexible seal body, and a portion for driving the seal body to rotate, wherein the two portions are configured to be separably fixed.

[0048] 2) The above-mentioned rotation adjustment component and the flexible sealing body are partially fixed to realize the linkage between the two. The rotation adjustment of the flexible sealing body is transformed into the adjustment of the corresponding linkage part on the rotation adjustment component. On this basis, a rotation redundancy is added to the flexible sealing body to reduce the deformation of the sealing body itself during rotation and to reduce the influence of the deformation on the relative position between the sealing body and the rotation component. Accordingly, the existing two-hand adjustment method is improved to one-hand adjustment.

[0049] 3) Improve the structure of the flexible sealing body and the relative position between the instrument channels on it, so as to expand the range of movement of the instrument ends on the operating surface within the channel, while avoiding accidental contact and mutual collision of the instrument ends within the channel during the adjustment of the sealing body.

[0050] Embodiments of a single-port puncture device according to the present invention will now be described with reference to the accompanying drawings. Those skilled in the art will recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims. Furthermore, in this specification, the drawings are not drawn to scale, and the same reference numerals denote the same parts.

[0051] It should be noted that the terms "first" and "second" used in the embodiments of the present invention are used to distinguish between two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of the invention. Subsequent embodiments will not explain this in detail.

[0052] See Figure 1 , Figure 1 The diagram illustrates the three-dimensional structure of a single-port puncture device according to a preferred embodiment of the present invention. Figure 1 In the direction shown, the single-port trocar in this preferred embodiment, from top to bottom, sequentially includes a first sealing body 100, an adjustable sealing structure 200, and an incision protective sleeve 300. During the operation, the trocar is inserted into the incision in the patient's abdomen, and then carbon dioxide is introduced using a pneumoperitoneum machine to form a pneumoperitoneum.

[0053] The first sealing body 100 is a hemispherical transparent component made of a soft material such as rubber, including a spherical end 101 at the top and a sleeve end (not shown) located at the bottom of the spherical end. Four instrument channels 102 are formed on the spherical end 101 of the first sealing body 100, through which various sizes of surgical instruments used during the operation are inserted. The sleeve end (not shown) of the first sealing body 100 is fitted with an adjustable sealing structure. The incision protector 300 is a retractable soft cannula, with elastic rings (not shown) inserted into the openings at both ends of the protector. One elastic ring can deform under force and be inserted into the incision in the patient's abdomen, while the other elastic ring is also fixedly connected to the adjustable sealing structure 200. Thus, the single-port trocar in this embodiment forms an internal through-structure from the first sealing body 100 to the incision protector 300.

[0054] Looking back at the improvement idea of ​​the preferred embodiment of the present invention, that is, a new rotation adjustment structure needs to be configured between the first sealing body 100 and the incision protective sleeve 300. On the one hand, this structure is expected to realize the rotation adjustment of the position of the first sealing body 100 in the axial direction of the puncture instrument; on the other hand, this structure needs to achieve a sealing effect at the joint of the three; more importantly, it is expected to ensure that the sealing effect between the three is not affected during the rotation adjustment of the first sealing body 100.

[0055] Figure 2 For illustration purposes, it shows Figure 1 The figure shows the three-dimensional structure of the adjustable sealing structure in the single-port trocar. As shown, the adjustable sealing structure 200 is an open piece, with an opening at its top to accommodate the insertion of the first sealing body 100. Inside, a through hole 201 is formed. When the trocar is assembled, the surgical instrument extends from the instrument channel 102 into the first sealing body 100, and then passes through the through hole 201 within the adjustable sealing structure 200, even reaching the operating surface at the patient's incision site. See also... Figure 3 , Figure 3 For illustration purposes, it shows Figure 2 The bottom structure of the adjustable sealing structure is shown. The through hole 201 in the adjustable sealing structure 200 extends further to form a protrusion 202 on the bottom surface of the adjustable sealing structure 200. A barb structure is formed at the edge of the protrusion. The elastic ring-shaped member that is fixed to the cut protective sleeve 300 and the adjustable sealing structure 200 is engaged with the barb structure to form an interference fit. This part will be described later.

[0056] from Figure 2 and Figure 3 As can be seen, the adjustable sealing structure 200 is an integral piece composed of multiple components spliced ​​and engaged. (See also...) Figure 4 , Figure 4 The exploded view shows the exploded structure of an adjustable sealing structure according to a preferred embodiment of the present invention. As shown, the adjustable sealing structure 200 consists of a connector 203 located at the center of the overall structure, two snap-fit ​​members that engage with the connector 203 from both radial sides toward the center, and an adjustment fixing member 204 that engages with the overall structure formed by the connector 203 and the two snap-fit ​​members.

[0057] Let's start with the connectors. See [link / reference] Figure 5 , Figure 5 For illustration purposes, it shows Figure 4 The structure of the connector shown is illustrated. See also... Figure 4 and Figure 5 As shown, in this preferred embodiment, the connector 203 comprises a three-level structure with a central through-hole. The through-hole 201 formed within the aforementioned adjustable sealing structure is the port of the through-hole portion of the connector 203. See also... Figure 6 , Figure 6 This is a side view, showing Figure 6 The side view of the connector shown shows that a coaxial three-level structure is formed on the connector 203, according to... Figure 6 The displayed orientation, from top to bottom, defines the three-level structure as the first-level structure 2031, the second-level structure 2032, and the third-level structure 2033. (Comparison) Figure 1 , Figure 2 and Figure 4As can be seen, in the assembled state, the first sealing body 100 extends into the adjustable sealing structure 200 from the opening, and its sleeve end (not shown) tightly fits with the first-stage structure 2031 of the connector 203, forming a seal from the inner cavity of the first sealing body 100 to the inner through portion of the connector 203. In contrast... Figure 3 It can be seen that the barb structure on the bottom protrusion of the aforementioned adjustable sealing structure 200 is also formed on the third-level structure 2033.

[0058] Continue reading Figure 6 The three-level structure can also be viewed as a three-level radial structure formed by extending the connector 203 body in the radial direction with different radial widths. In this embodiment, the radial extension width of each level is different, so the widths of the first to third level structures 2033 in the horizontal direction are also different. Among them, the extension width of the second level structure 2032 is the widest, thus forming an annular channel 2034 around the internal through structure of the connector 203 between the first level structure 2031 and the second level structure 2032.

[0059] Figure 7 This is a cross-sectional view showing the cross-sectional structure of the adjustable sealing structure and the portion of the first sealing body sleeve in this preferred embodiment. Combined with... Figure 4 and Figure 7 After the snap-fit ​​component engages radially with the connector 203, a portion of the snap-fit ​​component is inserted into the annular channel 2034 between the first-level structure 2031 and the second-level structure 2032, and the two snap-fit ​​components are joined together to form a closed component.

[0060] See Figure 8 and Figure 9 , Figure 8 and Figure 9 They are shown respectively Figure 4 The structure of the two snap-fit ​​components is shown in the diagram. The two snap-fit ​​components are defined as follows: Figure 8 The first connector 205 shown and Figure 9 The second snap-fit ​​component 206 is shown. In this embodiment, both the first and second snap-fit ​​components are arc-shaped, and each has a notch 2051 formed in its inner arc portion. When the first snap-fit ​​component 205 and the second snap-fit ​​component 206 are mated, the two semi-circular notches 2051 can be joined to form a complete circular opening. (See previous image.) Figure 7 The circular opening formed by the inner arc segment of the snap-fit ​​component is adapted to the annular channel 2034 between the first and second level structures 2032 of the connector 203. That is, the circular opening can be fitted onto the outer contour of the annular channel 2034.

[0061] Let's discuss the specific structure of the snap-fit ​​connector. Continuing with... Figure 8 and Figure 9On one side of the arc-shaped body of the first connector 205 and the second connector 206, a protrusion is further extended to form a protrusion, which, for ease of explanation, is defined as the first protrusion 2052 and the second protrusion 2062, respectively. (See previous text.) Figure 4 When the first connector 205 and the second connector 206 are mated, they form an open piece with a through opening in the middle. Now let's look at... Figure 7 During assembly, the first-level structure 2031 of the connector 203 is located within the open portion formed by the mating of the two parts. Both the first protrusion 2052 and the second protrusion are stepped. The difference is that the first protrusion 2052 has a first notch 2054 with a hook portion 2053 at each end of its arcuate extension direction, at the connection point of the two stepped surfaces. The first notch 2054 faces the inner arc of the first connector 205. Similarly, the second protrusion 2062 has a second notch 2064 at the same location, also at the connection point of the two stepped surfaces, and the second notch 2064 faces away from the inner arc of the second connector 206. Thus, it can be understood that when the first connector 205 and the second connector 206 are mated, they are fixed together by the interlocking of the hook portion 2053 on the first notch 2054 and the second notch 2064 on the second connector 206.

[0062] Looking back Figure 7 For the connecting member 203, the first snap-fit ​​member 205, the second snap-fit ​​member 206 and the sleeve end of the first sealing body 100, the fit between them is as follows: the sleeve end is sleeved on the first-level structure 2031 of the connecting member 203. At the same time, after the first snap-fit ​​member 205 and the second snap-fit ​​member 206 are snapped into the annular channel 2034, the sleeve end is also snapped into the gap between the surface of the snap-fit ​​member and the first-level structure 2031, so as to achieve a tight fit between the first sealing body 100 and the connecting member 203.

[0063] Looking back Figure 4 After the connector and snap-fit ​​are assembled, they form a second sealing body. The adjusting fastener 204 then covers the second sealing body. Figure 10 For illustration purposes, it shows Figure 4 The structure of the adjusting fastener 204 shown in the figure is as follows: the adjusting fastener 204 is a collar piece, according to... Figure 10 The shown orientation includes the vertically oriented sleeve portion 2041 and the annular portion 2042 that fits against the second sealing body. The sleeve portion 2041 and the annular portion 2042 are joined to form a platform surface. Regarding the sleeve portion 2041, the aforementioned vertical orientation is consistent with the extension direction of the internal passage of the puncture device, or in other words, it is consistent with the engagement direction of the first sealing body 100 and the connecting member 203. Accordingly, the first sealing body 100 can extend into the sleeve portion 2041 of the adjusting fastener 204. Figure 11The diagram shows the state of the first sealing body and the adjusting fastener being fitted together. Figure 10 and Figure 11 On the inner ring surface of the sleeve portion 2041 of the adjusting fastener 204, a plurality of connecting posts 2043 are formed around the inner ring surface of the sleeve portion 2041. The connecting posts 2043 are made of a soft colloidal material and can deform under stress and pressure. Figure 11 On the first sealing body 100, a plurality of connecting holes 104 are formed on the connecting portion between the spherical end 101 and the sleeve end 103. In this preferred embodiment, the number of connecting holes 104 and connecting posts 2043 are the same, that is, each connecting hole 104 can be inserted into a corresponding connecting hole 104. On the other hand, since both the first sealing body 100 and the connecting posts 2043 are made of soft material, the diameter of the connecting holes 104 can be set to be slightly smaller than the size of the connecting posts 2043, so that the connecting posts 2043 can be deformed under pressure and squeezed into the connecting holes 104, forming an interference fit between the two to ensure the positioning effect between the connecting holes and posts.

[0064] By connecting the corresponding links between the connecting posts, a linkage effect is achieved between the first sealing body 100 and the adjusting fastener 204. In the assembled state, as mentioned earlier, the sleeve end 103 of the first sealing body 100 is attached to the first-level structure 2031 of the connecting member 203. Thus, when the adjusting fastener 204, sleeved on the first sealing body 100, displaces in the same direction as the extension direction of the inner channel of the puncture device, it can cause the first sealing body 100 to displace as well. In this state, further reference... Figure 11 On the body of the first sealing body 100, a tension portion 105 is formed between the spherical end 101 and the sleeve end 103. This tension portion 105 is a concave, redundant deformation section on the body of the first sealing body 100. The function of this redundant deformation section is that when the first sealing body 100 is stretched or rotated, the tension portion 105 will deform in the same direction as the movement. Due to the presence of the tension portion 105, the sleeve connection and sealing effect between the sleeve end 103 of the first sealing body 100 and the first-stage structure 2031 of the connector 203 will not be affected by the displacement or rotation of the first sealing body 100. Therefore, under this structure, a tight connection and sealing performance between the first sealing body 100 and the connector 203 can always be maintained.

[0065] Next, let's discuss the annular portion 2042 of the adjusting fastener 204. Let's review... Figure 2 , Figure 4 as well as Figure 8 and Figure 9The annular portion 2042 covers the second sealing body. A positioning post 2055 is formed on the arc-shaped body of both the first snap-fit ​​member 205 and the second snap-fit ​​member 206. Correspondingly, multiple positioning holes 2044 are formed at equal intervals around the surface of the annular portion 2042 of the adjusting and fixing member 204. When the adjusting and fixing member 204 is engaged with the second sealing body, the positioning posts 2055 pass through the positioning holes 2044 to limit the adjustment and fixing member 204 and the second sealing body, thereby determining the relative position between the adjusting and fixing member 204 and the second sealing body, and also determining the relative position between the first sealing body 100 and the second sealing body.

[0066] Since the annular portion 2042 of the adjusting fastener 204 includes multiple positioning holes 2044, each positioning hole 2044 is equivalent to a preset fixed position for the positioning pin 2055. That is, multiple preset positions are preset for the axial rotation of the adjusting fastener 204. In this way, by rotating the adjusting fastener 204 and adjusting the positioning pin 2055 through the positioning hole 2044, the relative fixed position of the adjusting fastener 204 and the second sealing body can be selected from multiple preset positions.

[0067] Of course, other preferred embodiments of the present invention are not limited to the structure disclosed above. The above structure can also be modified in at least the following aspects:

[0068] 1) Regarding the engagement relationship between the first snap-fit ​​member 205 and the second snap-fit ​​member 206, in this preferred embodiment, the snap hook portion 2053 formed on the first snap-fit ​​member 205 engages with the second notch 2064 formed on the second snap-fit ​​member 206. Obviously, it is easy to conceive of configuring both snap-fit ​​members such that one end of their two ends in the arcuate extension direction forms a snap hook structure and the other end forms a notch structure. In this way, when the two snap-fit ​​members are engaged and fixed, each snap-fit ​​member is configured such that its snap hook structure engages with the notch structure on the other snap-fit ​​member, and its notch structure also engages with the snap hook structure on the other snap-fit ​​member accordingly.

[0069] 2) The fixing relationship between the first sealing body 100 and the adjusting fastener 204 can be as described above, where the connecting post 2043 on the inner ring of the adjusting fastener 204 passes through the connecting hole 104 on the body of the first sealing body 100 to form a limiting fixation; naturally, the connecting post formed on the body of the first sealing body 100 can also pass through the connecting hole formed on the inner ring of the adjusting fastener to form a fixation, except that in this way, the orientation of the connecting post formed on the first sealing body 100 should be extending away from the central axis of the first sealing body 100; similarly, the number of connecting posts can be adjusted in different preferred embodiments for the corresponding connection relationship of the connecting hole posts, and the preferred embodiments of the present invention should not be limited by the above factors;

[0070] 3) Based on the same idea, in adjusting the engagement relationship between the fixing member 204 and the second sealing body, or rather, the snap-fit ​​member, it can be done as described above, by passing the positioning hole 2044 on the annular part 2042 through the positioning post 2055 on the arc-shaped body of the snap-fit ​​member. It is easy to imagine that it can also be configured such that the positioning post on the annular part passes through the positioning hole formed on the arc-shaped body of the snap-fit ​​member. In this case, the difference from the above structure is that the positioning post on the annular part should be located on the side surface of the annular part that is in contact with the snap-fit ​​member, and correspondingly, the way the positioning hole passes through the positioning post is changed to the way the positioning post is inserted downward into the positioning hole. As for the number and correspondence of the positioning holes and posts, it can be a one-to-one correspondence between positioning holes and positioning posts, or a one-to-one correspondence between multiple positioning holes and multiple positioning posts. In the many-to-many connection relationship of positioning holes and posts, it is necessary to adjust the number of positioning holes according to the spacing and limit the positioning holes from exceeding the positioning range of the positioning holes, which would affect the engagement between the fixing member and the snap-fit ​​member.

[0071] This concludes the description of the adjustable sealing structure in a preferred embodiment of the present invention. During intraoperative adjustment, the operator can hold and lift the adjusting fastener 204 with one hand to separate the adjusting fastener 204 from the snap-fit ​​component, and then rotate the adjusting fastener 204. Due to the linkage between the adjusting fastener 204 and the first sealing body 100, the rotation of the adjusting fastener 204 will cause the first sealing body 100 to rotate axially and deform the tension portion 105. Since the sleeve end 103 of the first sealing body 100 is tightly engaged with the connecting component 203, the sealing effect between the two will not be affected during rotation. When rotated to the predetermined position, the adjusting fastener 204 is then fitted onto the positioning post by fitting the positioning hole on the adjusting fastener 204 above the positioning post, thereby locking the adjusting fastener 204, the rotated first sealing body 100, and the second sealing body. During the aforementioned rotation process, on the one hand, the sealing effect between the sealing bodies is always maintained during the rotation adjustment process; on the other hand, due to the presence of the positioning hole, the first sealing body 100 is guaranteed not to rotate excessively.

[0072] In fact, besides the improvements mentioned above, the configuration between the connector and the snap-fit ​​can also be in other forms besides the structure described above. Figure 12 This is an exploded view showing the exploded structure of another preferred embodiment of the invention. (See diagram below.) Figure 12 As shown, the difference between this preferred embodiment and the aforementioned structure lies in the change of the connector 203, the snap-fit ​​member, and the connection relationship between them. (See also...) Figure 4 In the aforementioned embodiment, during assembly, the two snap-fit ​​components are joined to form an open section, and the first-level structure of the connector is located within this open section. The inner arc surface of the snap-fit ​​component forms a dry protrusion, which is pressed tightly by the first connector. However, considering that during adjustment, the adjusting fixing component is lifted, the connector on the open section will be exposed. Therefore, although the aforementioned structure can ensure the sealing effect between the sealing bodies, in certain surgical environments, the exposure of the open section may cause gas-liquid condensates or impurities to remain on the surface of the snap-fit ​​component and remain between the two-level structures of the connector.

[0073] Therefore, in such Figure 12 In another preferred embodiment, the adjustable sealing structure has been redesigned. As shown in the figure, the two snap-fit ​​components mating together form a closure with an opening on its surface. This closure contains a storage space, within which the primary structure of the connector is housed.

[0074] Specifically... Figure 13 For illustration purposes, it shows Figure 12The preferred embodiment of the connector shows a structure. The difference between the connector 203' in this embodiment and the aforementioned structure is that the connector 203' only includes two coaxial levels, defined as a first level structure 2031' and a second level structure 2032' in the same way. The end of the second level structure 2032' forms a widened barb structure. During assembly, an annular sealing ring 301 is tied to the second level structure 2032', and the elastic annular member of the cut-out protective sleeve 300 is combined with the barb structure to form an interference fit.

[0075] Figure 14 and Figure 15 The first snap-fit ​​component 205' and the second snap-fit ​​component 206' of this embodiment are shown respectively. Unlike the aforementioned snap-fit ​​components, in this embodiment, the first snap-fit ​​component 205' and the second snap-fit ​​component 206' are configured as hollow arc-shaped components. The hollow interior forms a semi-circular arc-shaped space, and an insertion port 2056 is formed on the inner arc side of the snap-fit ​​component. Similarly, the two sides of the insertion port of the first snap-fit ​​component 205 further extend to form protruding ends 2057, with upper and lower clearances between the two protruding ends. The clearance structure on the first snap-fit ​​component 205 and the clearance portion on the second snap-fit ​​component 206 also form a fixing structure with hooks and notches engaging as described above. (See previous text) Figure 12 In this embodiment, when the two connectors are connected, the two semi-circular arc-shaped spaces are connected to form a storage part. The first-level structure 2031 of the connector 203 is located in the storage part in the assembled state, forming a sealing structure.

[0076] In this embodiment, when the adjusting fastener 204 is lifted, the top of the second sealing body, which is composed of the snap-fit ​​and the connector, is no longer exposed, and the arc-shaped surface of the snap-fit ​​is covered by the connector.

[0077] Of course, in both of the above structures, two semi-circular snap-fit ​​pieces are inserted into the connector in the radial direction to form an integral structure that engages with the primary structure of the connector. In other embodiments of the present invention, multiple snap-fit ​​pieces can be selected. For example, three snap-fit ​​pieces with an arc segment angle of 120° can be used. The inner arc of each piece is further extended to form a protrusion or a notch on both sides. In the scheme of multiple snap-fit ​​pieces, the insertion stability of the adjustable sealing structure can be further enhanced.

[0078] This concludes the explanation of the first two aspects of the improvement ideas of the preferred embodiment of the present invention. The third aspect of the improvement of the embodiment of the present invention involves adjusting the position of the instrument channels on the first sealing body. In, for example, in existing single-port trocars cited in the background section, the multiple instrument channels on the top sealing body are typically configured as follows:

[0079] The top surface of the sealing body forms a flat surface. Multiple instrument channels, perpendicular to this flat surface, are located at different positions on the top surface of the sealing body. Depending on the diameter, one or more groups are formed on the top surface of the sealing body. Furthermore, typically, one group of instrument channels maintains a certain angle of inclination relative to the other vertically positioned instruments relative to the flat surface. This serves two purposes: firstly, to avoid collisions between instruments, and secondly, to create clearance to avoid obstructing the surgical field of view.

[0080] However, after long-term practice and testing, it has been found that the existing structure still cannot solve the problem of accidental contact between the ends of the instruments, and the movement of the instruments within the sealed body is relatively concentrated. See also Figure 1 and Figure 12 Unlike existing structures, in the preferred embodiment of the present invention, the top of the first sealing body 100 is set as a transparent spherical surface, and a portion of the instrument channel is located on the side of the spherical surface near the stretching portion. This increases the coverage area of ​​the instrument's end on the incision surface, allowing it to be compressed against the soft spherical surface, thus enabling fine-tuning in any direction. In practical design, the specifications of the instrument channels at the top and side of the spherical surface can be changed according to different surgical needs and instrument specifications, including adjusting the diameter of the inlet at the channel end and the diameter of the channel itself.

[0081] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A single-port trocar, comprising: a first sealing body forming a plurality of instrument channels; an incision protective sleeve; and an adjustable sealing structure between the first sealing body and the incision protective sleeve, wherein the single-port trocar forms an internal through-structure extending from the first sealing body to the incision protective sleeve, and the first sealing body is axially rotatable, wherein... The adjustable sealing structure is a modular assembly with an internally formed channel, comprising: A connector is a hollow component containing a coaxial multi-stage radially extending structure. The sleeve end of the first sealing body engages with the connector, so that the connector communicates with the inner cavity of the first sealing body. At least two snap-fit ​​members, each snap-fit ​​member abutting each other in the radial direction of the inner through structure member and engaging with at least one radially extending structure of the connector member to form a second sealing body with the connector member; An adjusting fastener is a collar extending in the same direction as the inner through structure and fitting against the second sealing body. The first sealing body passes through the adjusting fastener, and its outer periphery is partially fixed to the adjusting fastener. The adjusting fastener and the second sealing body are configured to be separably fixed, wherein, during intraoperative adjustment, the operator lifts the adjusting fastener to separate the adjusting fastener from the second sealing body, and rotates the adjusting fastener to select one of a plurality of preset positions for fixing the adjusting fastener and the second sealing body.

2. The single-port puncture device according to claim 1, wherein, The snap-fit ​​component is an arc-shaped component, with its inner arc edge extending radially to form a protrusion. The snap-fit ​​components are mated together to form an open component. The bottom of the open component has a through hole formed by the splicing of the protrusions. The fit between the snap-fit ​​component and the radially extending structure is as follows: One radial extension structure of the connector is engaged within the open part, and the protrusion of each engaging member is inserted between two adjacent radial extension structures.

3. The single-port puncture device according to claim 1, wherein, The snap-fit ​​component is a hollow arc-shaped component with an internal storage space. An insertion port is formed on the inner arc side of the snap-fit ​​component. A protrusion extends radially from one side of the insertion port. The snap-fit ​​components abut against each other to form a closed component with an opening. The fit between the snap-fit ​​component and the radially extending structure is as follows: A radially extending structure of the connector is housed within the cavity of the closure.

4. The single-port puncture device according to claim 2 or 3, wherein, The connector is a through-hole component. The multi-stage radial extension structure of the connector includes at least a first-stage structure for engaging with the snap-fit ​​component and a second-stage structure for fixing with the cut-out protective sleeve. The first-stage structure and the second-stage structure are connected by a connecting part. The sleeve end of the first sealing body fits into the first-stage structure. The connecting ring of the cut-out protective sleeve fits into the second-stage structure to form an interference fit.

5. The single-port puncture device according to claim 4, wherein, A sealing ring is fitted onto the second-level structure, and the connecting ring of the cut protective sleeve is fitted onto the sealing ring, forming an interference fit with the second-level structure.

6. The single-port puncture device according to claim 5, wherein, The mating between the snap-fit ​​components is configured such that the snap-fit ​​hooks and latches on each component engage with each other. The snap-fit ​​component forms a hook structure or a bayonet structure at both ends of its arc-shaped extension direction; or, On any snap-fit ​​component, a hook structure is formed at one end of its extension direction, and a bayonet structure is formed at the other end.

7. The single-port puncture device according to claim 5, wherein, The mating between the snap-fit ​​components is configured such that the hook and latch structures formed at both ends of the protrusions of each snap-fit ​​component engage with each other, wherein... The protrusions are located at both ends of their arc-shaped extension direction, each forming a hook structure or a latch structure, or... On any snap-fit ​​component, a hook structure is formed at one end of the two ends of the protrusion extending in the direction of the protrusion, and a bayonet structure is formed at the other end.

8. The single-port puncture device according to claim 6 or 7, wherein, The adjusting fastener includes a sleeve portion that fits with the first sealing body and an annular portion that fits with the second sealing body. The sleeve portion and the annular portion are joined to form a platform surface. The adjusting fastener and the first sealing body are fitted together by a connecting post made of soft material passing through a connecting hole. The adjusting fastener and the second sealing body are fixed and limited by a positioning post passing through a positioning hole.

9. The single-port puncture device according to claim 8, wherein, The first sealing body is a hemispherical part made of soft material, including a spherical end and a sleeve end. A tension portion is formed between the spherical end and the sleeve end. When the adjusting and fixing member is separated from the second sealing body, the tension portion generates redundant deformation, and the adjusting and fixing member rotates to drive the first sealing body to rotate in the same direction.

10. The single-port puncture device according to claim 9, wherein, The annular portion of the adjusting fastener has several through positioning holes on its surface. At least one positioning post is formed on the snap-fit ​​member that is adapted to the positioning holes. When adjusting the adjusting fastener to select the fixed position of the adjusting fastener and the second sealing body, at least one positioning post is inserted into at least one positioning hole so that the adjusting fastener and the second sealing body are fixedly limited.

11. The single-port puncture device according to claim 9, wherein, At least one positioning post is formed on the annular portion of the adjusting fastener, and several through positioning holes are formed along the outer arc edge of the snap-fit ​​member. When adjusting the adjusting fastener to select the fixed position of the adjusting fastener and the second sealing body, at least one positioning post is inserted into at least one positioning hole so that the adjusting fastener and the second sealing body are fixedly limited.

12. The single-port puncture device according to claim 10 or 11, wherein, The instrument channel is located at the spherical end of the first sealing body, including a plurality of first instrument channels located at the top of the spherical surface and extending in the same direction as the axial direction of the first sealing body, and at least one second instrument channel located on the side of the spherical surface. The second instrument channel extends obliquely relative to the axial direction of the first sealing body and is disposed close to the stretching portion. The diameters of the first instrument channels and the second instrument channels may be the same or different.

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