Rotatable telescopic endoscope expansion retractor

Abstract

The utility model discloses a rotatable telescopic endoscope expansion retractor, which comprises an outer sleeve, an inner sleeve, a telescopic rod, a telescopic rod, a telescopic rod, a telescopic rod, a telescopic rod, a telescopic rod, a telescopic rod and a telescopic rod, and is characterized in that the outer sleeve axially extends from a near end to a far end; the retraction part is arranged at the far end of the outer sleeve; the extrusion tube is arranged at the near end of the outer sleeve and configured to be arranged outside the endoscope sleeve in a sleeving mode, the extrusion tube extends in the circumferential direction and is provided with a notch, the near end of the notch is open, the far end of the notch is closed, and the two sides, close to the notch, of the extrusion tube are each provided with an elastic deformation section; the locking assembly comprises a positioning pipe sleeve wrapping the extrusion pipe in a positioning mode and a fastener movably connected with the positioning pipe sleeve, and the end of the fastener can act on or be separated from the elastic deformation sections on the two sides of the notch so as to lock or loosen the extrusion pipe on the outer wall of the endoscope sleeve. The retractor can be effectively combined with the endoscope sleeve, the extrusion tube can be loosened relative to the outer wall of the endoscope sleeve, adjustment is very convenient, the extrusion tube can be locked on the outer wall of the endoscope sleeve, and operation and use are convenient.

Description

Technical Field

[0001] The utility model relates to a spinal surgery instrument, in particular to an endoscopic expansion retractor. Background Art

[0002] Spinal endoscopy is one of the most promising minimally invasive spinal surgery techniques and is currently widely used in clinical practice. Based on the anatomical structure and physiological characteristics of the spine, this technology can provide targeted and precise treatment for common spinal nerve root compression diseases.

[0003] Retractors are used to retract tissues for surgery, protect surrounding organs and tissues from damage, and facilitate exploration and operation. During spinal surgery, in order to expand the operating field of the spinal endoscope and avoid damaging the spinal nerves, some will assist in combined operation with retractors. Retractors can retract the spinal nerves and expand the operating range of the endoscope at the surgical site. However, existing retractors are not convenient to use. It is difficult to adjust the angle and distance in a small area, and it is also difficult to lock the position of the retractor. The operation requirements are too high and there are certain risks. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a rotatable and telescopic endoscopic dilatation retractor, which can be effectively combined with an endoscopic sleeve and is easy to adjust and operate.

[0005] According to an embodiment of the utility model, the rotatable and telescopic endoscopic dilatation retractor comprises: an outer sleeve extending axially from the proximal end to the distal end, the outer sleeve being configured to be sleeved outside the endoscope sleeve; a retracting portion being arranged at the distal end of the outer sleeve; an extrusion tube being arranged at the proximal end of the outer sleeve and being configured to be sleeved outside the endoscope sleeve, the extrusion tube extending circumferentially and having a notch, the proximal end of the notch being open and the distal end being closed, and both sides of the extrusion tube close to the notch having elastic deformation sections; a locking assembly comprising a positioning tube sleeve wrapped outside the extrusion tube and a fastener movably connected to the positioning tube sleeve, the ends of the fastener being able to act on or disengage from the elastic deformation sections on both sides of the notch to lock or loosen the extrusion tube to the outer wall of the endoscope sleeve.

[0006] The invention has at least the following beneficial effects: the retractor sets the outer sleeve and the extrusion tube outside the endoscope sleeve, and can be effectively combined with the endoscope sleeve. Before spinal surgery, when the retracting part arrives near the surgical site along with the endoscope sleeve and needs further fine adjustment, the user can first unlock the locking assembly to disengage the ends of the fastener from the elastic deformation segments on both sides of the notch, so that the elastic deformation segments can recover, and the extrusion tube can be loosened relative to the outer wall of the endoscope sleeve. The user can then rotate and axially move the outer sleeve relative to the endoscope sleeve to adjust the angle and axial position of the retracting part, and effectively adjust the retracting part to the specified position to retract the spinal nerves and expand the operating range and field of view of the endoscope. The adjustment is very convenient. Then the user can lock the locking assembly again, so that the ends of the fastener act on the elastic deformation segments on both sides of the notch, forcing the elastic deformation segments to deform. The extrusion tube can be locked to the outer wall of the endoscope sleeve to prevent the two from moving relative to each other, and the operation is convenient.

[0007] According to some embodiments of the utility model, the positioning sleeve is provided with an internal thread, the axial direction of the internal thread extends radially toward the extruded tube, the fastener is correspondingly provided with an external thread, and the fastener is threadedly connected to the positioning sleeve.

[0008] According to some embodiments of the utility model, a stop cover for preventing the fastener from detaching from the positioning sleeve is installed on the positioning sleeve.

[0009] According to some embodiments of the present invention, the fastener is a hand-tightened bolt.

[0010] According to some embodiments of the present invention, the extruded tube includes two half tubes that are spaced apart from each other, and the notch is formed between the same sides of the two half tubes.

[0011] According to some embodiments of the present utility model, a limiting protrusion is provided at the proximal end of the half tube, and the limiting protrusions of the two half tubes extend backwards.

[0012] According to some embodiments of the utility model, a guide portion is provided at the proximal end of the limiting protrusion, and the guide portion is an inclined surface or a curved surface, and the two half-tubes can be elastically deformed when being squeezed toward each other.

[0013] According to some embodiments of the utility model, the outer sleeve is provided with a limiting step for stopping the positioning sleeve at a position close to the extrusion tube.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0016] Figure 1 This is a schematic diagram of the structure of the embodiment of the utility model after the locking assembly is hidden;

[0017] Figure 2 for Figure 1 AA section view in;

[0018] Figure 3 It is a schematic diagram of the structure of an embodiment of the utility model;

[0019] Figure 4 for Figure 3 A cross-sectional view of

[0020] Figure 5 It is a cross-sectional view of the cooperation between the embodiment of the utility model and the endoscope sleeve.

[0021] Figure numbers: endoscope sleeve 1, outer sleeve 2, limiting step 21, retracting part 3, extrusion tube 4, notch 41, elastic deformation section 42, half tube 43, limiting protrusion 431, guide part 432, locking assembly 5, positioning sleeve 51, internal thread 511, fastener 52, external thread 521, stop cover 53. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0023] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, axial, radial, circumferential, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0025] Reference Figures 1 to 5 The utility model discloses a rotatable and telescopic endoscopic dilatation retractor, which comprises an outer sleeve 2, a retracting part 3, an extrusion tube 4 and a locking assembly 5.

[0026] Among them, refer to Figure 4 and Figure 5The outer sleeve 2 extends axially from the proximal end to the distal end. The outer sleeve 2 is configured to be sleeved outside the endoscope sleeve 1. The retractor 3 is arranged at the distal end of the outer sleeve 2. The circumferential area of ​​the retractor 3 gradually decreases from the proximal end to the distal end. The retractor 3 can retract the spinal nerves, that is, to push the spinal nerves away relative to the spine, thereby expanding the operating range and field of view of the endoscope at the surgical site.

[0027] Reference Figure 1 and Figure 2 The extruded tube 4 is disposed at the proximal end of the outer sleeve 2 and is configured to be sleeved outside the endoscope sleeve 1. The extruded tube 4 extends in the circumferential direction and is provided with a notch 41. The proximal end of the notch 41 is open and the distal end is closed. Both sides of the extruded tube 4 near the notch 41 are provided with elastic deformation sections 42. It can be understood that the elastic deformation section 42 can be offset in the radial direction of the extruded tube 4 after being extruded.

[0028] Reference Figure 3 , Figure 4 and Figure 5 The locking assembly 5 includes a positioning sleeve 51 wrapped around the extruded tube 4 and a fastener 52 movably connected to the positioning sleeve 51. The ends of the fastener 52 can act on or disengage from the elastic deformation sections 42 on both sides of the notch 41 to lock or loosen the extruded tube 4 to the outer wall of the endoscope sleeve 1.

[0029] The retractor can be effectively combined with the endoscope sleeve 1. Before spinal surgery, when the retractor 3 arrives near the surgical site along with the endoscope sleeve 1 and needs further fine adjustment, the user can first unlock the locking assembly 5 to disengage the ends of the fastener 52 from the elastic deformation segments 42 on both sides of the notch, allowing the elastic deformation segments 42 to recover, and the squeezing tube 4 can be loosened relative to the outer wall of the endoscope sleeve 1. The user then rotates and axially moves the outer sleeve 2 relative to the endoscope sleeve 1 to adjust the angle and axial position of the retractor 3, and effectively adjusts the retractor 3 to the specified position to retract the spinal nerves and expand the operating range and field of view of the endoscope. The adjustment is very convenient. Then the user locks the locking assembly 5 again to make the ends of the fastener 52 act on the elastic deformation segments 42 on both sides of the notch 41, forcing the elastic deformation segments 42 to deform. The squeezing tube 4 can be locked to the outer wall of the endoscope sleeve 1 to prevent the two from moving relative to each other, and the operation is easy to use.

[0030] Reference Figure 4 In some embodiments of the utility model, the positioning sleeve 51 is provided with an internal thread 511, and the axial direction of the internal thread 511 extends radially toward the extruded tube 4. The fastener 52 is correspondingly provided with an external thread 521. The fastener 52 is threadedly connected to the positioning sleeve 51. By rotating the fastener 52, the fastener 52 can be moved closer to or away from the notch 41. In some embodiments, the fastener 52 is a hand-tightened bolt, and the fastener 52 can be conveniently rotated by hand without tools.

[0031] Reference Figure 4 and Figure 5 In order to prevent the fastener 52 from completely detaching from the positioning sleeve 51, a stop cover 53 is installed on the positioning sleeve 51, and the stop cover 53 is clamped on the positioning sleeve 51. Specifically, the fastener 52 includes a screw, a head, and a bare rod section arranged between the screw and the head. The bare rod section has no external thread. The stop cover 53 can open a through hole that can only be bent and expanded in one direction. The screw of the fastener 52 is expanded through the through hole and completely inserted into the through hole until the through hole is wrapped around the bare rod section. In this way, the screw cannot pass through the through hole in the reverse direction, thereby preventing the fastener 52 from completely detaching from the positioning sleeve 51.

[0032] Reference Figure 1 and Figure 2 In some embodiments, the extrusion tube 4 includes two half-tubes 43 that are spaced apart, and a notch 41 is formed between the same sides of the two half-tubes 43. Both sides of each notch have two elastic deformation segments 42. When the end of the fastener 52 acts on the elastic deformation segments 42 on both sides of one of the notches 41, the four elastic deformation segments 42 can be pressed against the outer wall of the endoscope sleeve 1 at the same time to achieve a hugging effect. It can also be understood that the side line of the elastic deformation segment 42 is in contact with the outer wall line of the endoscope sleeve 1 to improve the friction effect.

[0033] Reference Figure 1 A limiting protrusion 431 is provided at the proximal end of the half tube 43, and the limiting protrusions 431 of the two half tubes 43 extend backwards. A guide portion 432 is provided at the proximal end of the limiting protrusion 431, and the guide portion 432 is an inclined surface or a curved surface. When the two half tubes 43 are squeezed toward each other, they can be elastically deformed, which can ensure that the positioning sleeve 51 can be inserted into the outside of the two half tubes 43 from the limiting protrusion 431, and once wrapped on the two half tubes 43, the limiting protrusion 431 can prevent the positioning sleeve 51 from detaching from the extrusion tube 4 from far to near, thereby achieving the limiting effect.

[0034] On the other hand, in some embodiments, referring to Figure 1 and Figure 2 The outer sleeve 2 is provided with a limiting step 21 at a position close to the extruded tube 4. The limiting step 21 stops the positioning sleeve 51, which can prevent the positioning sleeve 51 from detaching from the extruded tube 4 from near to far, thereby realizing the axial positioning of the positioning sleeve 51 on the extruded tube 4.

[0035] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] Of course, the present invention is not limited to the above-mentioned embodiments, and technicians familiar with the field may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A rotatable and telescopic endoscopic dilatation retractor, characterized in that: include: An outer sleeve extending axially from the proximal end to the distal end, and the outer sleeve is configured to be sleeved outside the endoscope sleeve; A retractor, disposed at the distal end of the outer sleeve; An extrusion tube is arranged at the proximal end of the outer sleeve and is configured to be sleeved outside the endoscope sleeve, the extrusion tube extends in the circumferential direction and is provided with a notch, the proximal end of the notch is open and the distal end is closed, and both sides of the extrusion tube close to the notch have elastic deformation sections; The locking assembly includes a positioning sleeve wrapped around the extruded tube and a fastener movably connected to the positioning sleeve, wherein the ends of the fastener can act on or disengage from the elastic deformation sections on both sides of the notch to lock or loosen the extruded tube to the outer wall of the endoscope sleeve.

2. The rotatable and telescopic endoscopic dilatation retractor according to claim 1, characterized in that: The positioning sleeve is provided with an internal thread, the axial direction of the internal thread extends toward the radial direction of the extruded tube, and the fastener is correspondingly provided with an external thread, and the fastener is threadedly connected with the positioning sleeve.

3. The rotatable and telescopic endoscopic dilatation retractor according to claim 2, characterized in that: A stop cover for preventing the fastener from being separated from the positioning sleeve is installed on the positioning sleeve.

4. The rotatable and telescopic endoscopic dilatation retractor according to claim 2, characterized in that: The fastener is a hand-tightened bolt.

5. The rotatable and telescopic endoscopic dilatation retractor according to claim 1, characterized in that: The extruded tube comprises two half tubes arranged at an interval, and the notch is formed between the same sides of the two half tubes.

6. The rotatable and telescopic endoscopic dilatation retractor according to claim 5, characterized in that: A limiting protrusion is arranged at the proximal end of the half tube, and the limiting protrusions of the two half tubes extend in opposite directions.

7. The rotatable and telescopic endoscopic dilatation retractor according to claim 6, characterized in that: A guide portion is provided at the proximal end of the position-limiting protrusion. The guide portion is an inclined surface or a curved surface, and the two half-tubes can be elastically deformed when being pressed toward each other.

8. The rotatable and telescopic endoscopic dilatation retractor according to claim 7, characterized in that: The outer sleeve is provided with a limiting step at a position close to the extrusion tube for stopping the positioning sleeve.

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