Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides an inner sleeve structure of a soft tissue expander, which reduces the wall thickness of an inner sleeve and improves the qualification rate of the inner sleeve during production on the premise of ensuring the outer diameter of the inner sleeve while realizing the matching of an inner core and the inner sleeve.
In order to achieve the above purpose, the invention adopts the following technical scheme
In a first aspect, an embodiment of the present invention provides a soft tissue expander, including an inner sleeve and an outer sleeve, the inner sleeve includes a tube body, a first clamping hole is provided at a head end of the tube body, the tube body is provided with at least one inner core clamping component and at least one positioning component, the inner core clamping component is provided with a second clamping hole, the positioning component is provided with a third clamping hole, the third clamping hole is coaxially arranged with the first clamping hole, and the second clamping hole is non-coaxially arranged with the first clamping hole and the third clamping hole.
Optionally, the inner core joint part sets up the tail end at the body, and the locating part sets up inside the body.
Optionally, the positioning component is arranged in the pipe body, and the positioning component and the pipe body are integrally arranged;
Or the locating component is arranged in a split type with the pipe body, the locating component is attached to the pipe surface in the pipe body, a first limiting structure and a second limiting structure are arranged in the pipe body, the first limiting structure is in contact with the tail end face of the locating component, the second limiting structure is in contact with the head end face of the locating component, and the locating component is fixed in the pipe body through the first limiting structure and the second limiting structure.
Optionally, the body includes first pipe portion and second pipe portion, and first pipe portion and second pipe portion splice constitution body, and the head end of first pipe portion is equipped with first draw-in hole, and the tail end is connected with the head end of second pipe portion, and the tail end of second pipe portion is equipped with inner core joint part.
Optionally, the tail end of the first pipe portion is provided with a slot, and the head end of the second pipe portion is inserted into the slot and fixed with the first pipe portion, and the outer pipe surfaces of the first pipe portion and the second pipe portion are flush.
Optionally, when the split type setting of locating part and body, second pipe portion inner tube face is equipped with annular boss, forms first limit structure and locating part tail end terminal surface contact, and the terminal surface of first pipe portion forms second limit structure and locating part's head end terminal surface contact.
Optionally, the second pipe portion is provided with a rib, and the rib passes through the positioning component and inserts into a limit groove arranged at the tail end of the first pipe portion so as to realize the positioning of the first pipe portion, the second pipe portion and the positioning component along the circumferential direction of the pipe body.
Optionally, the positioning component is arranged inside the pipe body, the positioning component separates the cavity in the pipe body, the head end of the pipe body is provided with at least one pressure reducing hole, the pressure reducing hole is communicated with the space in the pipe body, and correspondingly, the positioning component is provided with pressure reducing channels which are communicated with the pipe body spaces at two sides of the positioning component.
Optionally, the end face of the head end of the outer sleeve and the vertical surface of the axis of the outer sleeve form a set acute angle.
Optionally, the inner sleeve is provided with a first clamping part, and the outer sleeve is provided with a second clamping part matched with the first clamping part;
the first clamping part is provided with a clamping groove matched with the second clamping part so that the second clamping part can be clamped into the clamping groove in a mode that the inner sleeve and the outer sleeve relatively rotate;
or the second clamping part is provided with a clamping groove matched with the first clamping part so that the first clamping part can be clamped into the clamping groove in a mode that the inner sleeve and the outer sleeve relatively rotate;
Or the second clamping part is provided with a fixing hole, the first clamping part is provided with a clamping head component, and the clamping head component is matched with the clamping hole so that the clamping head component can be clamped into the fixing hole along the axial direction of the inner sleeve and the outer sleeve;
Or the second clamping part is provided with a clamping head assembly, the first clamping part is provided with a fixing hole, and the clamping head assembly is matched with the clamping hole so that the clamping head assembly can be clamped into the fixing hole along the axial directions of the inner sleeve and the outer sleeve.
Optionally, when first joint portion is equipped with the dop subassembly, first joint portion is equipped with the fluting, and the dop subassembly is including first dop and the second dop that is located the fluting both sides respectively, and when second joint portion was equipped with the dop subassembly, second joint portion was equipped with the fluting, and the dop subassembly is including first dop and the second dop that is located the fluting both sides respectively.
Optionally, the fixation hole axis is arranged parallel to the axes of the outer sleeve and the inner sleeve.
In a second aspect, an embodiment of the present invention provides an inner cannula of a soft tissue expander, including a tube body, a first clamping hole is provided at a head end of the tube body, the tube body is provided with at least one inner core clamping component and at least one positioning component, the inner core clamping component is provided with a second clamping hole, the positioning component is provided with a third clamping hole, the third clamping hole is coaxially arranged with the first clamping hole, and the second clamping hole is non-coaxially arranged with the first clamping hole and the third clamping hole.
The invention has the beneficial effects that:
1. According to the soft tissue expander disclosed by the invention, the third clamping hole is coaxially arranged with the first clamping hole, the second clamping hole, the first clamping hole and the third clamping hole are non-coaxially arranged, at least three clamping points which are not in a straight line are formed, the function of clamping the inner core is realized, the inner diameter requirement on an inner sleeve is reduced, the wall thickness of the inner sleeve can be reduced, the production and cost are facilitated, the product quality is improved, and meanwhile, the weight of a product is reduced, the use experience of doctors is improved, the use safety is improved, and the health of patients is ensured due to the reduction of the wall thickness of the inner sleeve.
2. The soft tissue expander provided by the invention is provided with the decompression hole, the positioning part is provided with the decompression channel, the decompression hole is communicated with the inner space of the tube body, when the soft tissue expander is applied to intracranial tissue expansion, intracranial blood or cerebrospinal fluid can enter the inner sleeve through the decompression hole and overflow from the tail end of the inner sleeve when the inner sleeve is pushed into the cranium along the inner core, so that the liquid is discharged out of the cranium, the increase of the cranium pressure caused when the expander is placed into the cranium is reduced, the high cranium pressure condition of a patient is relieved, and the health of the patient is prevented from being endangered when the soft tissue expander is placed into the cranium.
3. The soft tissue expander has the advantages that the head end of the outer sleeve is a bevel surface, the operation range of a doctor is enlarged on the premise of not enlarging the diameter of the outer sleeve, and the operation effect is improved.
4. The soft tissue expander provided by the invention has the advantages that the clamping head component can be clamped into the clamping holes along the axial direction of the inner sleeve and the outer sleeve, so that the operation of doctors is facilitated, errors are not easy to cause, and the processing design requirements on the inner sleeve and the outer sleeve are reduced.
Detailed Description
For convenience of description, the "tail end" in this embodiment is the end that is close to the operator and the end that is far away from the operator is the head end in the actual operation.
Example 1
The embodiment provides a soft tissue expander, as shown in fig. 1-2, including interior sleeve pipe and the outside outer tube of cover sleeve pipe, interior sleeve pipe includes the body, and the internal diameter of body is greater than the external diameter of inner core, and the body adopts the PC material to make, and the body cross-section is circular or square or oval, and corresponding, the outer tube cross-section is circular or oval, in this embodiment, the body cross-section is circular, and the cross-sectional area of body tail end is greater than the cross-sectional area of head end, forms conical structure, conveniently places human tissue into, and corresponding, the outer tube is conical structure too.
The utility model provides a body head end is provided with the draw-in hole and is first draw-in hole, the inner core can pass first draw-in hole, first draw-in hole forms a joint to the inner core, the inner core is brain needle or can brain needle or other surgical instruments, the body tail end is equipped with inner core joint part, be provided with the draw-in hole on the inner core joint part, for the second draw-in hole, it can be understood that inner core joint part also can set up a plurality of, the second draw-in hole is used for passing the inner core, the second draw-in hole forms the second joint to the inner core, the inside at least one locating part that is provided with of body, locating part and body integral type set up or split type set up, the locating part separates the inner space of body, be provided with the draw-in hole for the third draw-in hole, the third draw-in hole is used for passing the inner core, the third draw-in hole forms at least one third joint to the inner core, wherein first draw-in hole and third draw-in hole are coaxial setting for the location of inner core, the second draw-in hole is non-coaxial, third draw-in hole is for the chucking of inner core, consequently, the same line joint strip that has not formed on the inner core is passed through to the first joint hole, the second clamp force can be applyed to the inner core, the second clamp force can be applied to the inner core.
It is understood that the positioning component can be arranged in the pipe body or outside the pipe body, the inner core clamping component can be arranged in the pipe body or outside the pipe body, and in the embodiment, the positioning component is arranged in the pipe body, and the inner core clamping component is arranged outside the pipe body.
The body includes second pipe portion 2 and first pipe portion 1, and the tail end of second pipe portion 2 is provided with connecting portion, and connecting portion is equipped with the inner core joint part 3 that radially stretches out along second pipe portion 2, and inner core joint part 3 adopts platelike structure, is provided with second draw-in hole 4 on the inner core joint part 3.
The head end of the second pipe part 2 is fixedly connected with the tail end of the first pipe part 1 to form the whole pipe body.
Specifically, as shown in fig. 3 to 4, the outer edge of the end face of the tail end of the first pipe portion 1 is provided with a slot 5, the radial dimension of the slot 5 along the first pipe portion 1 is equal to the wall thickness of the second pipe portion 2, the head end of the second pipe portion 2 is inserted into the slot 5 and fixed with the first pipe portion 1 to form the whole pipe body structure, and the radial gap dimension of the slot 5 along the first pipe portion 1 is equal to the wall thickness of the second pipe portion 2, so that the outer pipe faces of the second pipe portion 2 and the first pipe portion 1 are flush.
The head end of the first pipe part 1 is of a hemispherical structure or a semi-ellipsoidal structure and other convex structures, so that the damage to tissues when the first pipe part is placed into human tissues is reduced.
In this embodiment, the head end of the first tube portion 1 adopts a semi-ellipsoidal structure, and the first clamping hole 6 is disposed at the center of the semi-ellipsoidal structure.
When the soft tissue expander is applied to intracranial surgery, the first clamping hole 6 of the soft tissue expander is plugged by the inner core, so that after the soft tissue expander is placed into the cranium, the cranium pressure can be raised, and the life and the health of a patient are seriously endangered, so that the head end of the first pipe part 1 is provided with the pressure reducing hole 7, and the pressure reducing hole 7 is arranged on the pipe wall of the semi-ellipsoidal structure of the head end of the first pipe part 1. The axis of the pressure relief hole 7 is parallel to the axis of the first pipe portion 1, and the pressure relief hole 7 communicates with the pipe interior space.
The pressure reducing holes 7 are provided in one or more, and when the pressure reducing holes 7 are provided in plural, the pressure reducing holes 7 are provided at equal intervals along the circumference, the center of which is located on the axis of the first pipe portion 1.
In the present embodiment, two pressure reducing holes 7 are provided, and the two pressure reducing holes 7 are symmetrically provided with respect to the first card hole 6.
In this embodiment, a positioning member is provided, where the positioning member is disposed at a position where the positioning member is connected to the first pipe portion 1 and the second pipe portion 2, and a part of the positioning member is located inside the first pipe portion 1, and another part of the positioning member is located inside the second pipe portion 2, and the positioning member divides a space in the pipe into two spaces, wherein one side is an inner space of the first pipe portion 1, and the other side is an inner space of the second pipe portion 2.
In order to match the pressure reducing hole 7, a pressure reducing channel 9 is arranged on the positioning component, and the pressure reducing channel 9 communicates the space of the first pipe part 1 with the space of the second pipe part 2.
When the inner sleeve is used, when the inner sleeve is pushed into the cranium along the inner core, intracranial blood or cerebrospinal fluid can enter the first pipe part 1 through the pressure reducing hole 7, then enter the second pipe part 2 through the pressure reducing channel 9, and finally overflow from the tail end of the second pipe part 2.
As shown in fig. 5-6, the positioning component and the pipe body are in split type, the positioning component comprises a fixing part and a separation part, the fixing part is a fixing pipe 11, the head end of the fixing pipe 11 is attached to a part other than the slot 5 on the end face of the first pipe part 1, the first pipe part 1 forms a second limiting structure for limiting the head end of the fixing pipe 11, the tail end of the fixing pipe 11 is attached to an annular boss 12 arranged on the inner side face of the second pipe part 2, the annular boss 12 is used for limiting the tail end of the fixing pipe 11 to form a first limiting structure, the outer pipe face of the fixing pipe 11 is attached to the inner pipe face of the second pipe part 2 to radially limit the fixing pipe 11, and then the positioning component is fixed inside the pipe body.
The partition portion adopts a positioning tube 13, and positioning tube 13 tail end stretches into inside fixed pipe 11 to through a transition pipe 14 of back taper and fixed pipe 11 tail end fixed, inside the head end of positioning tube 13 stretches into first pipe portion 1, the inner space of positioning tube 13 is the back taper cavity that both ends open set up, and the open end of its head end forms third draw-in hole 15 and is used for the joint inner core, through setting up the back taper cavity, makes things convenient for the installation of inner core.
The inner core seals the third engagement hole 15, so that the partition partitions the inner space of the tube.
The pressure reducing channels 9 are provided on the side portions of the positioning members, along the axial direction of the positioning members, and communicate the inner spaces of the tubes on both sides of the positioning members.
In this embodiment, as shown in fig. 7, in order to locate the first pipe portion 1, the second pipe portion 2 and the locating member in the circumferential direction, ribs 16 are provided on the head end face of the annular boss 12 of the second pipe portion 2, and the ribs 16 pass through the locating member through the decompression channel 9 and then extend into a limit groove 17 formed on the tail end face of the first pipe portion 1, so that the circumferential location of the first pipe portion 1, the second pipe portion 2 and the locating member is achieved. The ribs 16 have a width smaller than the width of the relief channel and avoid impeding the flow of liquid, so that the circumferential positioning of the positioning member is only approximately positioned.
The tail end of the second pipe part 2 is also fixed with a first clamping part 18 extending radially along the first pipe part through a connecting part, and the first clamping part 18 is used for being fixed with the outer sleeve. Wherein the first clamping portion 18 is closer to the head end of the second tube portion 2 than the core clamping component 3.
In this embodiment, the inner core clamping component 3 is pinched first, so that the first clamping hole 6, the second clamping hole 4 and the third clamping hole 15 are coaxially arranged, then the inner core 19 passes through the first clamping hole 6, the second clamping hole 4 and the third clamping hole 15, the inner core clamping component 3 is loosened, the inner core clamping component 3 is restored to the original position, and the inner core 19 is clamped through the second clamping hole 4.
The function of clamping the inner core 19 is achieved through the three clamping points which are not in the same straight line, the requirement on the inner diameter of the inner sleeve is reduced, the wall thickness of the inner sleeve can be reduced, the production and cost are facilitated, the product quality is improved, meanwhile, the weight of the product is reduced due to the reduction of the wall thickness of the inner sleeve, the use experience of doctors is improved, the use safety is improved, and the health of patients is guaranteed.
The outer sleeve 10 is sleeved on the outer periphery of the inner sleeve, the length of the outer sleeve 10 is smaller than that of the inner sleeve, as shown in fig. 8, the end face of the head end of the outer sleeve 10 and the vertical face of the outer sleeve axis form an acute angle to form a bevel face 20, when the outer sleeve is used, the bevel face 20 faces an operation face, under the condition that the section of the outer sleeve is not enlarged, the operation range of a doctor is enlarged through the bevel face 20, the operation effect is improved, the degree of the acute angle is set to be 10 degrees to 30 degrees, the effect of the enlarged range is guaranteed, and the supporting effect of the outer sleeve on surrounding tissues is not influenced.
The tail end of the outer sleeve is provided with a second clamping part 8, a fixing hole 21 is formed in the second clamping part 8, the fixing hole 21 is a rectangular hole, the axis of the rectangular hole is parallel to the axes of the inner sleeve and the outer sleeve 10, a chuck component is arranged on the first clamping part 18 and is matched with the fixing hole 21, and the chuck component can be clamped into the fixing hole along the axial directions of the inner sleeve and the outer sleeve.
In this embodiment, the chuck assembly includes first chuck 22 and second chuck 23, after first chuck 22 and second chuck 23 card go into fixed orifices 21, can laminate with two opposite sides of fixed orifices 21, wherein the tip of first chuck 22 is provided with protruding 24, corresponding, fixed orifices 21 adopts the shoulder hole, protruding 24 can contact with the shoulder face of fixed orifices 21, prevent that first chuck 22 and second chuck 23 from breaking away from fixed orifices 21, and through the shoulder hole, can avoid protruding 24 to protrude in second joint 8 head end face, the fixed orifices 21 is used for the edge that contacts with first chuck 22 and second chuck 23 sets up the inclined plane, the distance of inclined plane tail end and fixed orifices 21 axis is greater than the distance of head end and fixed orifices 21 axis so that first chuck 22 and second chuck 34 contact with the inclined plane and insert the in-process, the inclined plane can exert the effort of drawing close to each other to first chuck and second chuck, make things convenient for first chuck 22 and second chuck 23 card into fixed orifices 21.
The first clamping part 18 is provided with the slot 25, the first clamping head 22 and the second clamping head 23 are respectively positioned at two sides of the slot 25, one end of the slot 25 extends to the outer side face of the first clamping part 18, the other end of the slot is communicated with the elastic hole 26, the elastic hole 26 widens towards the direction of the first clamping head 22, and the relative displacement of the parts of the first clamping part 18 at two sides of the slot 25 is further facilitated, so that the operation is facilitated.
In order to prevent deformation and fracture of the first clamping part due to overlarge vertical displacement deviation when the first clamping parts 18 on two sides of the slot 25 are partially pinched, an anti-deflection clamping head 27 is arranged on a side slot surface of the slot close to the first clamping head, and an anti-deflection clamping groove 28 matched with the anti-deflection clamping head is arranged on the side slot surface on the other side.
In another embodiment, the first clamping portion is provided with a fixing hole, the second clamping portion is provided with a chuck assembly, and the chuck assembly and the fixing hole are arranged in the same manner, which is not described in detail herein.
When the inner sleeve and the outer sleeve are fixed, the first clamping part and the second clamping part move along the axial directions of the inner sleeve and the outer sleeve, so that the chuck assembly is clamped into the fixing hole, and the inner sleeve and the outer sleeve are fixed. By adopting the mode, errors of doctors are not easy to cause, the inner sleeve and the outer sleeve do not need to be made into a round section, and the inner sleeve and the outer sleeve are convenient to manufacture.
In the third embodiment, the first and second engaging portions are provided in the same manner as in the patent CN 201910865237.9.
In a fourth embodiment, the second clamping portion is provided with a clamping groove matched with the first clamping portion so that the first clamping portion can be clamped into the clamping groove in a mode that the inner sleeve and the outer sleeve rotate relatively.
The method of using the soft tissue dilator of this embodiment differs from the method of using the soft tissue dilator disclosed in CN201910865237.9 only in the manner of fixing the inner tube and the outer tube and the manner of fixing the inner core, and the other steps are only required to be the method steps described in patent CN201910865237.9, and will not be described in detail here.
After the outer sleeve is placed in human tissue to establish a channel, a doctor rotates the outer sleeve, so that the outer sleeve rotates around the axis of the outer sleeve, the bevel face faces an operation face such as a hematoma face and the like, the focus is fully exposed, and then corresponding operation is performed.
Example 2
The embodiment provides an interior sleeve of soft tissue expander, which comprises a tube body, the body head end is provided with the draw-in hole and is first draw-in hole 6, the inner core can pass first draw-in hole 6, first draw-in hole 6 forms a joint to the inner core, the inner core is brain puncture needle or visual brain puncture needle or other surgical instruments, the body tail end is equipped with inner core joint part 3, be provided with the draw-in hole on the inner core joint part, for second draw-in hole 4, inner core joint part still can set up a plurality of, second draw-in hole 4 is used for passing the inner core, second draw-in hole 4 forms the second joint to the inner core, the body inside is provided with at least one locating part, locating part separates the inner space of body, the locating part is provided with the draw-in hole, for third draw-in hole 15, third draw-in hole 15 is used for passing the inner core, third draw-in hole 15 forms at least one third joint to the inner core, wherein first draw-in hole 6 and third draw-in hole 15 coaxial setting, second draw-in hole 4 and first draw-in hole 6, third draw-in hole 15 non-coaxial setting, consequently, the same straight line joint part has been formed at least three and can be passed through to the inner core 4 after the first draw-in hole and third joint part 3, clamping force can be applyed to the inner core.
The other structures of the inner sleeve are the same as those of the inner sleeve in example 1, and a description thereof will not be repeated here.
In this embodiment, the method for fixing the inner core 19 and the inner sleeve includes first pinching the inner core clamping component 3 to make the first clamping hole 6, the second clamping hole 4 and the third clamping hole 15 as coaxial as possible, then passing through the inner core 19 in the three clamping holes, loosening the inner core clamping component 3, and clamping and fixing the inner core 19 by using the second clamping hole 4. Other steps of using the soft tissue expander are not described in detail herein.
While the foregoing description of the embodiments of the present invention has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the invention, but rather, it is intended to cover all modifications or variations within the scope of the invention as defined by the claims of the present invention.