CN106377302B - Coreless puncture outfit - Google Patents
Coreless puncture outfit Download PDFInfo
- Publication number
- CN106377302B CN106377302B CN201610878916.6A CN201610878916A CN106377302B CN 106377302 B CN106377302 B CN 106377302B CN 201610878916 A CN201610878916 A CN 201610878916A CN 106377302 B CN106377302 B CN 106377302B
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- puncture
- cannula
- tip
- coreless
- sliding slot
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3415—Trocars; Puncturing needles for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3478—Endoscopic needles, e.g. for infusion
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B2017/3454—Details of tips
Abstract
The invention discloses a coreless puncture outfit, which comprises: a piercing tip, a cannula assembly, and a seal assembly; the casing pipe subassembly includes the sleeve pipe, the sleeve pipe link up the setting, sheathed tube one end by seal assembly carries out the selectivity sealed, the sheathed tube other end accept in puncture pointed end, just the sheathed tube other end by puncture pointed end selectivity is opened or is closed, puncture pointed end with rotatable mode connect in on the outside wall of the sleeve pipe other end. The coreless puncture outfit is convenient to use and low in cost, does not have a puncture core bar in the traditional puncture outfit, realizes puncture of the puncture outfit by a puncture tip, and can open a port of a sleeve for an anastomat or other surgical instruments to enter when the anastomat or other surgical instruments need to enter an abdominal cavity.
Description
Technical Field
The invention relates to a surgical instrument, in particular to a coreless puncture outfit, and belongs to the field of medical equipment.
Background
In abdominal cavity examination, abdominal cavity operation and other minimally invasive or surgical operations, a puncture outfit is an indispensable surgical instrument. The puncture instrument may establish an access channel in the abdominal wall of the body for the entry of a stapler or other surgical instrument (e.g., endoscope, scissors, guide wire, catheter, filter, stent, etc.) into the abdominal cavity and provide a passage for the ingress and egress of gas to control the pneumoperitoneum required for the procedure to be performed for examination or surgical procedures.
When a medical operation of the minimally invasive anastomat is started, a doctor generally firstly cuts a small incision on the abdomen of a patient, then the top point of the puncture end of the puncture core rod is aligned with the cut small incision to reciprocate and move downwards, the puncture sleeve penetrates through the cortex of the abdomen of the patient by the puncture device, and then the doctor pulls out the puncture core rod in the puncture sleeve.
However, most of the puncture outfits are disposable, so that in the traditional puncture outfits with puncture core bars, the puncture core bar of each puncture outfit is discarded after puncture is finished, thereby causing serious waste and improving the manufacturing cost of the puncture outfits; and because the seal structure of puncture ware is the elasticity material, in order to ensure its leakproofness, puncture core bar and seal cover tube assembly need split back packing, have improved the packing cost. Therefore, it is necessary to provide a further solution to the above problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a coreless puncture outfit to overcome the defects in the prior art.
To achieve the above object, the present invention provides a coreless puncture instrument, comprising: a piercing tip, a cannula assembly, and a seal assembly;
the casing pipe subassembly includes the sleeve pipe, the sleeve pipe link up the setting, sheathed tube one end by seal assembly carries out the selectivity sealed, the sheathed tube other end accept in puncture pointed end, just the sheathed tube other end by puncture pointed end selectivity is opened or is closed, puncture pointed end with rotatable mode connect in on the outside wall of the sleeve pipe other end.
As an improvement of the coreless piercer of the present invention, the piercing tip has a first position and a second position; when the puncture tip is positioned at the first position, the central axis of the puncture tip is parallel to or coincided with the central axis of the cannula, and the other end of the cannula is closed by the puncture tip; when the puncture tip is located at the second position, an included angle is formed between the central axis of the puncture tip and the central axis of the cannula, and the other end of the cannula is opened by the puncture tip.
As an improvement of the coreless puncture outfit, the outer side wall of the sleeve is symmetrically provided with sliding grooves, the inner side wall of the puncture tip is symmetrically provided with sliding blocks, and the sliding blocks can slide along the sliding grooves.
As an improvement of the coreless puncture outfit, the sliding groove comprises a first sliding groove and a second sliding groove, the first sliding groove extends along the axial direction of the sleeve, the end parts of the first sliding groove and the second sliding groove are communicated, an included angle is formed between the first sliding groove and the second sliding groove, and the included angle is an obtuse angle.
As an improvement of the coreless puncture outfit of the invention, the sliding groove further comprises a third sliding groove, the third sliding groove is communicated with the first sliding groove and the second sliding groove, the third sliding groove and the second sliding groove are symmetrically arranged, and the symmetry axis of the third sliding groove and the second sliding groove is superposed with the central line of the first sliding groove in the length direction.
As an improvement of the coreless puncture outfit, an included angle is formed between the second sliding groove and the third sliding groove, the included angle is smaller than 180 degrees, a protrusion is arranged between the second sliding groove and the third sliding groove, and the protrusion extends towards the first sliding groove.
As an improvement of the coreless puncture outfit of the invention, the end of the bulge is arc-shaped or linear.
As an improvement of the coreless puncture outfit, the sliding groove is an arc-shaped groove, the sliding block can slide from one end of the arc-shaped groove to the other end of the arc-shaped groove, when the sliding block is positioned at one end of the arc-shaped groove, the central axis of the puncture tip is parallel to or coincided with the central axis of the cannula, and the other end of the cannula is closed by the puncture tip; when the sliding block slides to the other end of the arc-shaped groove, an included angle is formed between the central axis of the puncture tip and the central axis of the sleeve, and the other end of the sleeve is opened by the puncture tip.
As an improvement of the coreless puncture outfit, the end part of the puncture tip is symmetrically provided with an extension part, and the slide block is positioned on the inner side wall of the extension part.
As an improvement of the coreless puncture outfit of the invention, a step part is arranged on the outer side wall of the end part of the sleeve.
As an improvement of the coreless puncture outfit, the puncture tip and the cannula are both provided with concave structures, so that the puncture tip and the cannula are prevented from interfering when moving mutually.
As an improvement of the coreless puncture outfit of the invention, an inclined plane is arranged in the inner space of the puncture tip, the edge of the inclined plane is connected with the inner side wall of the puncture tip, the inclined plane is obliquely arranged towards the rotating direction of the puncture tip, and the inclined plane is close to the other end of the cannula.
As an improvement of the coreless piercer of the present invention, the bevel is elliptical, or the bevel comprises a first bevel and a second bevel, the first bevel and the second bevel are intersected, the axis of the cannula passes through the intersection line between the first bevel and the second bevel, and both the first bevel and the second bevel are semi-elliptical.
Compared with the prior art, the invention has the beneficial effects that: the coreless puncture outfit of the invention does not have the puncture core bar in the traditional puncture outfit, thereby having lower cost, and the puncture core bar and the sealing sleeve component do not need to be disassembled and then packaged, thereby reducing the packaging cost. The coreless puncture outfit realizes puncture of the puncture outfit by the puncture tip, and can open the port of the sleeve for the entry of the anastomat or other surgical instruments when the anastomat or other surgical instruments need to enter the abdominal cavity, thereby being convenient for use.
Drawings
FIG. 1 is an exploded view of a piercing tip and cannula assembly of one embodiment of a coreless puncture instrument of the present invention;
FIG. 2 is a schematic plan view of the coreless piercer of the present invention with the piercing tip in the first position;
FIG. 3 is a schematic plan view of the coreless puncture instrument of the present invention, with the puncture tip in the second position;
FIG. 4 is a schematic plan view of one embodiment of a cannula of the coreless puncture instrument of the present invention;
FIG. 5 is a schematic plan view of another embodiment of a cannula of the coreless puncture instrument of the present invention;
FIG. 6 is a schematic plan view of a coreless puncture instrument of the present invention with a bevel disposed inside the puncture tip;
FIG. 7 is a schematic plan view of the coreless puncture instrument of the present invention, in which the puncture tip is provided with a bevel inside.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "reciprocal", and the like, indicate orientations and positional relationships that are based on the orientations and positional relationships shown in the drawings, and are used merely for convenience in describing and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. The following describes each embodiment of the present invention in detail with reference to specific embodiments.
As shown in fig. 1, the coreless puncture instrument of the present invention includes: a piercing tip 10, a cannula assembly, and a seal assembly.
The piercing tip 10 is used to effect piercing by a piercing instrument, which replaces the piercing core of existing piercing instruments. And the piercing tip 10 can open the port of the cannula for entry of a stapler or other surgical instrument when it is desired to enter the abdominal cavity.
The cannula assembly includes a cannula 20, the cannula 20 being disposed therethrough to establish an access path for a stapler or other surgical instrument after it enters the abdominal cavity of a human body. One end of the cannula 20 is selectively sealed by the sealing assembly (not shown), the other end 21 of the cannula 20 is received in the puncture tip 10, and the other end 21 of the cannula 20 is selectively opened or closed by the puncture tip 10, specifically, the puncture tip 10 is rotatably movably connected to the outer side wall surface of the end of the cannula 20. Wherein, the selective sealing means that the sealing component does not seal one end of the cannula 20 when the anastomat or other surgical instruments are required to enter the abdominal cavity; the seal assembly seals one end of the cannula 20 when access to the abdominal cavity is not required by a stapler or other surgical instrument. The selective opening or closing means that, at the time of puncturing, the puncturing tip 10 closes the other end 21 of the cannula 20; when it is desired to access the abdominal cavity with a stapler or other surgical instrument, the piercing tip 10 opens the other end 21 of the cannula 20.
Thus, when a puncture is desired, the puncture tip 10 closes the other end 21 of the cannula 20 and, under the force of the puncture, the puncture tip 10 penetrates through the incisional cortex of the patient's abdomen and into the abdominal cavity of the person. When it is required to insert a stapler or other surgical instrument into the abdominal cavity of a human body, the stapler or other surgical instrument enters the cannula 20 from one end of the cannula 20, and the puncture tip 10 performs a rotational motion and opens the other end 21 of the cannula 20 under the action of the inserted stapler or other surgical instrument, thereby facilitating the insertion of the stapler or other surgical instrument.
With reference to fig. 2 and 3, further, the piercing tip 10 has a first position a and a second position B. When the puncture tip 10 is located at the first position a, the central axis of the puncture tip 10 is parallel to or coincident with the central axis of the cannula 20, and the other end 21 of the cannula 20 is closed by the puncture tip 10; when the puncture tip 10 is located at the second position B, an included angle is formed between the central axis of the puncture tip 10 and the central axis of the cannula 20, and the other end 21 of the cannula 20 is opened by the puncture tip 10.
As shown in fig. 1, a step 22 is provided on the outer side wall of the other end 21 of the cannula 20, and the step 22 abuts against the end surface of the puncture tip 10. Preferably, the wall thickness of the portion of the piercing tip 10 nested with the other end 21 of the cannula 20 corresponds to the height of the step 22. Said height is in the radial direction of said sleeve 20. By the arrangement, the consistency of the outer diameter sizes of the puncture tip 10 and the cannula 20 is kept, the condition that the tissues of a patient are clamped can be avoided, and the smooth puncture process is facilitated.
As shown in fig. 4, in order to realize that the puncture tip 10 can open or close the port of the cannula 20 in a rotating manner, sliding grooves are symmetrically arranged on the outer side wall of the cannula 20, the outer side wall of the cannula 20 comprises the outer side wall of the other end 21, and sliding blocks 11 are symmetrically arranged on the inner side wall of the puncture tip 10, and the sliding blocks 11 can slide along the sliding grooves. The sliding groove may be formed through the wall surface of the sleeve 20, or may be formed on the outer wall of the sleeve 20 in a recessed manner.
Specifically, the sliding grooves on either side include a first sliding groove 23 and a second sliding groove 24, wherein the first sliding groove 23 extends along the axial direction of the sleeve 20, the ends of the first sliding groove 23 and the second sliding groove 24 are communicated, and an included angle is formed between the first sliding groove 23 and the second sliding groove 24, and the included angle is an obtuse angle. Preferably, the first sliding groove 23 and the second sliding groove 24 are smoothly connected to facilitate the sliding of the sliding block 11 between the first sliding groove 23 and the second sliding groove 24. Preferably, the sliding block 11 may be a cylindrical protrusion structure, and the sliding groove is a special-shaped groove for the sliding block 11 to slide in.
Therefore, when puncture is needed, the central axis of the puncture tip 10 is parallel to or coincident with the central axis of the cannula 20, and the puncture tip 10 guides the cannula 20 into the abdominal cavity of the human body. After the puncture tip 10 and the cannula 20 enter the abdominal cavity of the human body, when a stapler or other surgical instrument needs to be inserted into the abdominal cavity of the human body, under the action of an external force, the sliding block 11 slides along the first sliding groove 23 to the second sliding groove 24, and is finally positioned at one end of the second sliding groove 23. Due to the obtuse angle between the first and second sliding slots 23 and 24, the puncture tip 10 is rotated to one side of the cannula 20, thereby opening the port of the cannula 20 to facilitate the entry and exit of the stapler or other surgical instrument into and out of the patient.
In other embodiments, as shown in FIG. 5, to effect bi-directional rotation of the puncture cannula 20. The sliding grooves on any side further comprise a third sliding groove 25, wherein the third sliding groove 25 is communicated with the first sliding groove 23 and the second sliding groove 24, the third sliding groove 25 and the second sliding groove 24 are symmetrically arranged, and the symmetry axis of the third sliding groove 25 and the second sliding groove 24 coincides with the central line of the first sliding groove 23 in the length direction. Preferably, the first sliding groove 23 and the third sliding groove 25 are smoothly connected to facilitate the sliding of the sliding block 11 between the first sliding groove 23 and the third sliding groove 25.
With such an arrangement, when a stapler or other surgical instrument needs to be inserted into the abdominal cavity of a human body, a doctor can slide the sliding block 11 into the second sliding groove 24 or the third sliding groove 25 along the first sliding groove 23 by controlling the direction of an external force applied to the puncture tip 10 by the stapler or other surgical instrument according to the surgical requirement, and at this time, the puncture tip 10 rotates to one side of the cannula 20, so that the port of the cannula 20 is opened, thereby facilitating the entry of the stapler or other surgical instrument.
When the sliding groove simultaneously comprises a second sliding groove 24 and a third sliding groove 25, an included angle is formed between the second sliding groove 24 and the third sliding groove 25, and the included angle is smaller than 180 degrees. Between the second runner 24 and the third runner 25, there is a protrusion 26, and the protrusion 26 extends toward the first runner 23. By providing said protrusion 26, the slider 11 is limited from moving in the sliding groove, so as to avoid the puncturing tip 10 from rotating by itself under the action of external force. Preferably, the ends of the projections 26 are curved or linear.
In addition, in other embodiments, the sliding groove may be provided as an integral structure, in which case, the sliding groove is integrally formed and is an arc-shaped groove, and the sliding block 11 may slide from one end of the arc-shaped groove to the other end of the arc-shaped groove. Thus, when the slider 11 is located at one end of the arc-shaped slot, the central axis of the puncture tip 10 is parallel to or coincides with the central axis of the cannula 20, and the other end of the cannula 20 is closed by the puncture tip 10; when the slider 11 slides to the other end of the arc-shaped groove, an included angle is formed between the central axis of the puncture tip 10 and the central axis of the cannula 20, and the other end of the cannula 20 is opened by the puncture tip 10.
Since the other end 21 of the cannula 20 is received in the puncture tip 10, interference between the puncture tip 10 and the cannula 20 occurs when the puncture tip 10 is rotated with respect to the cannula 20. The interference here refers to the limitation of motion caused by the fact that two or more components cannot move continuously or rub against each other due to mutual collision when moving. Thus, to avoid interference, the piercing tip 10 is provided with a recess structure 30 at the interference portion when rotated relative to the cannula 20. By providing the recess structure 30, as shown in FIG. 1, interference between the piercing tip 10 and the cannula 20 during relative movement is avoided, resulting in the piercing tip 10 not being able to open.
The end of the puncture tip 10 is symmetrically provided with extending parts 12, the extending parts 12 extend along the axial direction of the puncture tip 10, and the slider 11 is located on the wall surface of the inner side of the extending parts 12. Preferably, the extension 12 extends from the puncture tip 10 integrally, and in other embodiments, the extension 12 may also be disposed on the puncture tip 10 in a connecting manner.
As shown in fig. 6, in addition, in order to enable the puncture tip 10 to smoothly rotate to one side of the cannula 20 by the action of the stapler or other surgical instrument, a slope 13 is provided in an inner space of the puncture tip 10, an edge of the slope 13 is connected to an inner sidewall of the puncture tip 10, the slope 13 is obliquely provided toward a rotation direction of the puncture tip 10, and the slope 13 is adjacent to a port of the cannula 20. In this manner, when the stapler or other surgical instrument is inserted into the cannula 20 and abuts against the inclined surface, the inclined surface 13 enables the force applied by the stapler or other surgical instrument to break up a component along the inclined surface 13, and the puncture tip 10 can be smoothly rotated by the component.
As shown in fig. 7, in the above embodiment, the inclined surface 13 may have an elliptical shape. Further, to accommodate bi-directional rotation of the piercing cannula 20, the bevel 13 includes a first bevel and a second bevel, wherein the first and second bevels intersect and the axis of the cannula 20 passes through the intersection between the first and second bevels. At this time, the first inclined plane and the second inclined plane are semi-elliptical.
In conclusion, the coreless puncture outfit of the invention has convenient use and low cost, does not have the puncture core rod in the traditional puncture outfit, realizes puncture of the puncture outfit by the puncture tip, and can open the port of the sleeve for the entry of the anastomat or other surgical instruments when the anastomat or other surgical instruments need to enter the abdominal cavity.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (11)
1. A coreless puncture instrument, comprising: a piercing tip, a cannula assembly, and a seal assembly;
the sleeve assembly comprises a sleeve which is arranged in a run-through manner, one end of the sleeve is selectively sealed by the sealing assembly, the other end of the sleeve is accommodated in the puncture tip, and the other end of the cannula is selectively opened or closed by the puncture tip which is rotatably attached to the outer side wall surface of the other end of the cannula, a step part is arranged on the outer side wall of the other end of the sleeve and is propped against the end surface of the puncture tip, the wall thickness of the part of the puncture tip sleeved with the other end of the sleeve is consistent with the height of the step part, the height is along the radial direction of the sleeve, the outer side wall of the sleeve is symmetrically provided with sliding grooves, the inner side wall of the puncture tip is symmetrically provided with sliding blocks, and the sliding blocks can slide along the sliding grooves.
2. The coreless piercer of claim 1, wherein the piercing tip has a first position and a second position; when the puncture tip is positioned at the first position, the central axis of the puncture tip is parallel to or coincided with the central axis of the cannula, and the other end of the cannula is closed by the puncture tip; when the puncture tip is located at the second position, an included angle is formed between the central axis of the puncture tip and the central axis of the cannula, and the other end of the cannula is opened by the puncture tip.
3. The coreless piercer of claim 1, wherein the sliding slot includes a first sliding slot and a second sliding slot, the first sliding slot extending substantially in an axial direction of the cannula, ends of the first sliding slot and the second sliding slot being in communication, and an included angle is formed between the first sliding slot and the second sliding slot, the included angle being an obtuse angle.
4. The coreless piercer of claim 3, wherein the sliding slot further comprises a third sliding slot, the third sliding slot is in communication with the first sliding slot and the second sliding slot, the third sliding slot and the second sliding slot are symmetrically arranged, and a symmetry axis of the third sliding slot and the second sliding slot coincides with a center line of the first sliding slot in a length direction.
5. The coreless piercer of claim 4, wherein the second slot and the third slot are angled at an angle of less than 180 °, and wherein a protrusion is disposed between the second slot and the third slot, the protrusion extending toward the first slot.
6. The coreless piercer of claim 5, wherein the end of the protrusion is curved or linear.
7. The coreless piercer of claim 1, wherein the sliding slot is an arcuate slot, the slider is slidable from one end of the arcuate slot to the other end, the central axis of the piercing tip is parallel to or coincides with the central axis of the cannula when the slider is positioned at one end of the arcuate slot, and the other end of the cannula is closed by the piercing tip; when the sliding block slides to the other end of the arc-shaped groove, an included angle is formed between the central axis of the puncture tip and the central axis of the sleeve, and the other end of the sleeve is opened by the puncture tip.
8. The coreless piercer of claim 1, wherein the end of the piercing tip is symmetrically provided with an extension, the slider being located on an inner sidewall of the extension.
9. The coreless piercer of claim 1, wherein the piercing tip and the cannula are each provided with a recess to prevent interference when the two are moved relative to each other.
10. The coreless piercer of claim 1, wherein the piercing tip is provided with a bevel in the interior space, the edge of the bevel being connected to an inner sidewall of the piercing tip, the bevel being angled towards the direction of rotation of the piercing tip, and the bevel being located proximate to the other end of the cannula.
11. The coreless piercer of claim 10, wherein the bevel is elliptical, or wherein the bevel comprises a first bevel and a second bevel, the first bevel and the second bevel intersecting, the axis of the cannula passing through an intersection between the first bevel and the second bevel, the first bevel and the second bevel both being semi-elliptical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610878916.6A CN106377302B (en) | 2016-10-08 | 2016-10-08 | Coreless puncture outfit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610878916.6A CN106377302B (en) | 2016-10-08 | 2016-10-08 | Coreless puncture outfit |
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| CN106377302A CN106377302A (en) | 2017-02-08 |
| CN106377302B true CN106377302B (en) | 2020-02-21 |
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| CN201610878916.6A Active CN106377302B (en) | 2016-10-08 | 2016-10-08 | Coreless puncture outfit |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109646084A (en) * | 2017-10-12 | 2019-04-19 | 江苏风和医疗器材股份有限公司 | A kind of centreless puncture outfit |
| CN109662759A (en) * | 2017-10-16 | 2019-04-23 | 江苏风和医疗器材股份有限公司 | A kind of centreless puncture outfit |
| CN109965948A (en) * | 2017-12-28 | 2019-07-05 | 江苏风和医疗器材股份有限公司 | A kind of centreless puncture outfit |
| CN109984821B (en) * | 2017-12-31 | 2021-08-06 | 江苏风和医疗器材股份有限公司 | Sleeve assembly |
| CN109984819B (en) * | 2017-12-31 | 2021-08-06 | 江苏风和医疗器材股份有限公司 | Method for assembling puncture element and sleeve |
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| CN106377302A (en) | 2017-02-08 |
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Address after: Dongsheng Road, Jiangyin city 214437 Jiangsu city of Wuxi province No. 6 D3 the first layer Applicant after: Jiangsu wind and medical equipment Limited by Share Ltd Address before: Dongsheng Road, Jiangyin city 214437 Jiangsu city of Wuxi province No. 6 D3 the first layer Applicant before: Jiangsu wind and medical equipment Co., Ltd |
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