CN107320161B - Self-retraction puncture core - Google Patents
Self-retraction puncture core Download PDFInfo
- Publication number
- CN107320161B CN107320161B CN201710765115.3A CN201710765115A CN107320161B CN 107320161 B CN107320161 B CN 107320161B CN 201710765115 A CN201710765115 A CN 201710765115A CN 107320161 B CN107320161 B CN 107320161B
- Authority
- CN
- China
- Prior art keywords
- puncture
- positioning
- cannula
- tip
- sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- A61B17/3494—Trocars; Puncturing needles with safety means for protection against accidental cutting or pricking, e.g. limiting insertion depth, pressure sensors
- A61B17/3496—Protecting sleeves or inner probes; Retractable tips
-
- 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
-
- 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
- A61B17/3421—Cannulas
-
- 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
- A61B2017/347—Locking means, e.g. for locking instrument in cannula
Landscapes
- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Pathology (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention relates to a self-retracting puncture core, which comprises a puncture cannula and a puncture body positioned in the puncture cannula, wherein the head end of the puncture body is provided with a puncture tip end, the tail end of the puncture body is connected with a puncture operating handle, the puncture tip end at the head end of the puncture body can penetrate out from the head end of the puncture cannula, and the puncture operating handle is positioned at the tail end of the puncture cannula; when the puncture tip of the puncture body penetrates out of the head end of the puncture cannula, the puncture body is pressed through the puncture operating handle so as to perform the required puncture operation by utilizing the puncture tip; when the puncture tip penetrates through the puncture area, the puncture cannula and the puncture body move relatively, so that the puncture tip of the puncture body can immediately enter the puncture cannula, and the puncture tip of the puncture body can be stably kept in the puncture cannula after the puncture tip enters the puncture cannula. The invention has compact structure, can meet the puncture requirement, can realize protection after puncture, is convenient to use and operate, and is safe and reliable.
Description
Technical Field
The invention relates to a puncture core, in particular to a self-retracting puncture core, and belongs to the technical field of medical instruments.
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 can establish an access channel in the abdominal wall of the human body for the laparoscopic or other surgical instruments (e.g., endoscope, scissors, stapler, guide wire, catheter, filter, stent, etc.) to enter into the abdominal cavity and provide a passage for the gas to enter and exit from the abdominal cavity to control the pneumoperitoneum required for the operation to perform the examination or surgical operation. When a minimally invasive laparoscopic medical operation is started, a doctor usually firstly cuts a small incision on the abdomen of a patient, then points the top of a puncture end to the cut small incision to puncture the abdominal wall with force, and fills carbon dioxide gas into the abdominal cavity to manufacture a laparoscopic operation cavity.
In the puncture core assembly in the prior art, the separation structure of the puncture end is generally a sheet structure, both sides of the separation structure are sharp, and the puncture outfit is rotated in a reciprocating manner during puncture and moves downwards while rotating in a left-right reciprocating manner. At the moment of puncturing the abdominal wall, an operator can hardly stop the operation due to inertial force, and if the operator cares the operation carelessly, the sharp puncturing head can puncture the abdominal cavity too deeply, so that intestinal canal rupture and even blood vessel rupture are caused, complications such as intestinal perforation, bleeding and the like are caused, and even the life is threatened. Such events occur during various clinical endoscopic surgeries, which brings disadvantages to the popularization of the endoscopic surgeries and threatens the safety of patients.
The abdominal cavity puncture outfit is clinically needed, when the abdominal wall is punctured, the sharp puncture head is retracted into the outer sleeve, and the damage to organs, visceral organs or blood vessels in the abdominal cavity is avoided.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a self-retracting puncture core which is compact in structure, can meet the puncture requirement, can realize protection after puncture, is convenient to use and operate, and is safe and reliable.
According to the technical scheme provided by the invention, the self-retracting puncture core comprises a puncture cannula and a puncture body positioned in the puncture cannula, wherein the head end of the puncture body is provided with a puncture tip end, the tail end of the puncture body is connected with a puncture operating handle, the puncture tip end of the head end of the puncture body can penetrate out from the head end of the puncture cannula, and the puncture operating handle is positioned at the tail end of the puncture cannula; the device also comprises a motion driving mechanism and a tip locking and retaining mechanism;
when the puncture body is pressed by the puncture operating handle, the puncture tip of the puncture body penetrates out of the head end of the puncture cannula so as to carry out the required puncture operation by utilizing the puncture tip penetrating out of the head end of the puncture cannula; when the puncture tip penetrates through the area to be punctured, the puncture cannula is driven to move relative to the puncture body through the movement driving mechanism, so that the puncture tip of the puncture body can immediately enter the puncture cannula; after the puncture tip enters the puncture cannula, the puncture tip of the puncture body is stably held in the puncture cannula by the tip lock holding mechanism.
The end part of the head end of the puncture cannula is provided with a flexible protective sleeve which is coaxially distributed with the puncture cannula; the puncture body and the puncture cannula are coaxially distributed.
The tip locking and retaining mechanism comprises a positioning elastic body capable of protruding out of the puncture body and an elastic body accommodating groove for accommodating the positioning elastic body, and the positioning elastic body is positioned between the puncture tip and the puncture operating handle on the puncture body;
the inner wall of the puncture sleeve is provided with an elastomer positioning groove matched with the positioning elastomer, and the head end of the positioning elastomer can extend into the elastomer positioning groove after the puncture tip penetrates through the region to be punctured and the puncture sleeve moves relative to the puncture body; after the head end of the positioning elastic body can extend into the elastic body positioning groove, the head end of the positioning elastic body can be always positioned in the elastic body positioning groove when the puncture body is pressed by the puncture operating handle, so that the puncture tip end of the puncture body is stably kept in the puncture sleeve.
The movement driving mechanism comprises an elastic pushing body sleeved on the puncture body, the head end of the elastic pushing body can extend into the puncture sleeve, the puncture operating handle is located outside the tail end of the elastic pushing body, the elastic pushing body can be compressed when the puncture body is pressed through the puncture operating handle, and when the puncture tip penetrates through the puncture area, the elastic pushing body pushes the puncture sleeve forward so that the puncture sleeve can move relative to the puncture body, and the puncture tip of the puncture body enters the puncture sleeve.
A tip unlocking mechanism is also included, by means of which the puncture tip stably held in the puncture cannula can be moved back in the puncture cannula.
The locating elastic body is a locating elastic piece with a tilting head end, the tip unlocking mechanism comprises an elastic piece pressing block which is arranged on the puncture operating handle and used for pressing the locating elastic body, and when the tail of the locating elastic body is pressed by the elastic piece pressing block, the locating elastic body can inwards contract in the elastic body accommodating groove.
The location elastomer is the location shell fragment of head end perk, most advanced release mechanism is including stretching into the internal unblock lever of puncture, the head of unblock lever sets up the magnetic adsorption body, and when the unblock lever stretched into the puncture body, the magnetic adsorption body can make location elastomer adsorption shrink in the elastomer back accomodate the inslot.
The puncture operating handle is arranged at the tail end of the puncture sleeve by utilizing the matching of the operating handle locating piece and the connecting locating hole, and can linearly move at the tail end of the puncture sleeve under the guiding of the operating handle locating piece.
Sleeve holes distributed in the length direction of the puncture sleeve are formed in the puncture sleeve, the sleeve holes and the puncture sleeve are coaxially distributed, and the sleeve holes penetrate through the puncture sleeve;
the sleeve hole comprises a first channel positioned at the front part of the puncture sleeve and a third channel positioned at the rear end of the puncture sleeve, the first channel is communicated with the third channel through the second channel, the aperture of the third channel is larger than that of the second channel, the outer diameter of the elastic pushing body is smaller than that of the third channel and larger than that of the second channel, and after the head end of the elastic pushing body extends into the puncture sleeve, the head end of the elastic pushing body can abut against the end part of the second channel.
The positioning elastic body is columnar and is arranged in the elastic body accommodating groove through a positioning spring;
the elastomer positioning groove runs through the puncture sleeve, and the positioning elastomer protrudes out of the puncture body through the positioning spring and can extend into the elastomer positioning groove.
The invention has the advantages that: the puncture body is arranged in the puncture sleeve, when the puncture tip of the puncture body penetrates out of the head end of the puncture sleeve, the puncture of a region to be punctured can be realized after the puncture tip is pressed through the puncture operating handle, the puncture body and the puncture sleeve move relatively while the puncture tip penetrates through the puncture region, the puncture tip of the puncture body enters the puncture sleeve, and the puncture tip can be stabilized in the puncture sleeve by utilizing the matching between the positioning elastic body and the positioning groove of the elastic body, so that the protection after puncture is realized, and the risk that the puncture tip brings extra damage after puncture is avoided; utilize puncture operating handle to go up shell fragment and press the movable block and can press the location elastomer for the location elastomer is accomodate in the elastomer and is received back the inslot, with the operation demand that satisfies many punctures, compact structure, use convenient operation, accommodation is wide, safe and reliable.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
FIG. 2 is a schematic view of the piercing tip entering the piercing cannula in accordance with example 1 of the present invention.
FIG. 3 is an exploded view of the puncture cannula, spring pusher, and flexible protective sheath of example 1 of the present invention.
Fig. 4 isbase:Sub>A cross-sectional viewbase:Sub>A-base:Sub>A of fig. 3 according to the present invention.
Fig. 5 is a cross-sectional view of B-B of fig. 3 in accordance with the present invention.
Fig. 6 is a cross-sectional view of C-C of fig. 3 according to the present invention.
Fig. 7 is a cross-sectional view of D-D of fig. 3 in accordance with the present invention.
FIG. 8 is a schematic view of the engagement between the puncture cannula and the spring pusher according to embodiment 1 of the present invention.
Fig. 9 is a cross-sectional view of E-E of fig. 8 in accordance with the present invention.
Fig. 10 is a schematic structural view of a puncture body in embodiment 1 of the present invention.
Fig. 11 is a cross-sectional view G-G of fig. 10 according to the present invention.
Fig. 12 is a cross-sectional view F-F of fig. 10 in accordance with the present invention.
FIG. 13 is a schematic view showing the connection and engagement between the lancing body and the lancing operation handle according to example 1 of the present invention.
Fig. 14 is a cross-sectional view H-H of fig. 13 in accordance with the present invention.
Fig. 15 is a schematic view of the positioning elastic body compressed and received in the elastic body accommodating groove according to embodiment 1 of the present invention.
FIG. 16 is a cross-sectional view of K-K of FIG. 1 according to the present invention.
FIG. 17 is a cross-sectional view of L-L of FIG. 1 in accordance with the present invention.
FIG. 18 is a cross-sectional view of M-M of FIG. 1 in accordance with the present invention.
Fig. 19 is a cross-sectional view of N-N of fig. 1 in accordance with the present invention.
FIG. 20 is a cross-sectional view of O-O of FIG. 1 in accordance with the present invention.
Fig. 21 is a cross-sectional view of P-P of fig. 2 in accordance with the present invention.
FIG. 22 is a cross-sectional view of Q-Q of FIG. 2 in accordance with the invention.
FIG. 23 is a cross-sectional view of R-R of FIG. 2 according to the present invention.
Fig. 24 is a structural view of an embodiment 2 of the present invention.
FIG. 25 is a schematic view of the unlocking lever being withdrawn from the puncture body to position the elastic body from tilting in embodiment 2 of the present invention.
Fig. 26 is a structural diagram for carrying out embodiment 3 of the present invention.
FIG. 27 is a schematic view of the locking of the puncture tip in the puncture cannula according to embodiment 3 of the present invention.
Description of reference numerals: 1-puncture cannula, 2-puncture body, 3-flexible protective sleeve, 4-puncture tip, 5-puncture operating handle, 6-elastic sheet pressing block, 7-elastic pushing body, 8-positioning elastic body, 9-flexible protective sleeve connector, 10-operating handle positioning sheet, 11-first channel, 12-elastic body positioning groove, 13-second channel, 14-third channel, 15-connecting groove, 16-elastic body accommodating groove, 17-operating handle connector, 18-connecting positioning hole, 19-unlocking rod, 20-magnetic adsorption body, 21-unlocking rod handle, 22-unlocking rod hole and 23-limiting step.
Detailed Description
The invention is further illustrated by the following specific figures and examples.
As shown in fig. 1 and 2: in order to meet the puncture requirement and realize protection after puncture, the puncture device comprises a puncture cannula 1 and a puncture body 2 positioned in the puncture cannula 1, wherein the head end of the puncture body 2 is provided with a puncture tip 4, the tail end of the puncture body 2 is connected with a puncture operating handle 5, the puncture tip 4 at the head end of the puncture body 2 can penetrate out from the head end of the puncture cannula 1, and the puncture operating handle 5 is positioned at the tail end of the puncture cannula 1; the device also comprises a motion driving mechanism and a tip locking and retaining mechanism;
when the puncture body 2 is pressed by the puncture operation handle 5, the puncture tip 4 of the puncture body 2 passes through the head end of the puncture cannula 1, so that the needed puncture operation can be carried out by the puncture tip 4 passing through the head end of the puncture cannula 1; when the puncture tip 4 penetrates through the area to be punctured, the puncture cannula 1 is driven to move relative to the puncture body 2 through the movement driving mechanism, so that the puncture tip 4 of the puncture body 2 can immediately enter the puncture cannula 1; after the puncture tip 4 has been introduced into the puncture cannula 1, the puncture tip 4 of the puncture body 2 is held stably in the puncture cannula 1 by means of the tip lock holding mechanism.
Specifically, the puncture cannula 1 is a hollow tubular structure, the puncture body 2 is disposed in the puncture cannula 1, the puncture body 2 may be a columnar or rod-shaped structure, and the outer diameter of the puncture body 2 is smaller than the inner diameter of the puncture cannula 1, as shown in fig. 16. The puncture tip 4 is located at the head end of the puncture body 2, the puncture of the region to be punctured can be realized by the puncture tip 4, the puncture operation handle 5 is installed at the tail end of the puncture body 2, generally, the puncture body 2 and the puncture cannula 1 are coaxially distributed, and the puncture operation handle 5 and the puncture body 2 are also coaxially distributed. The puncture operating handle 5 is located at the tail end of the puncture cannula 1, the puncture operating handle 5 can move along the length direction of the puncture cannula 1, and when the puncture operating handle 5 moves along the direction from the tail end of the puncture cannula 1 to the head end of the puncture cannula 1, the puncture tip 4 can be driven to move or the puncture body 2 can be pressed by the puncture operating handle 5.
In specific implementation, when the puncture tip 4 penetrates out of the head end of the puncture cannula 1, the required puncture operation can be performed, and of course, before the puncture operation is performed, the puncture cannula 1 is externally sleeved with a curve card, and the curve card is used for contacting with the skin of the region to be punctured. After the puncture area position is determined, the puncture tip 4 is positioned by utilizing the labyrinth card, the puncture tip 4 is ensured to penetrate out of the head end of the puncture cannula 1, the puncture body 2 is pressed by the puncture operating handle 5, so that the puncture tip 4 at the head end of the puncture body 2 is contacted with the skin of the area to be punctured, and the puncture tip 4 can penetrate through the area to be punctured along with the continuous pressing of the puncture body 2 by the puncture operating handle 5.
When the puncture tip 4 penetrates through the area to be punctured, the head end of the puncture cannula 1 and the puncture tip 4 are both in a suspended state, the motion driving mechanism can be used for driving the puncture cannula 1 to move relative to the puncture body 2, and when the puncture cannula 1 moves relative to the puncture body 2, the puncture tip 4 can immediately enter the puncture cannula 1; after the puncture tip 4 enters the puncture cannula 1, the puncture tip 4 of the puncture body 2 can be stably kept in the puncture cannula 1 by using the tip locking and retaining mechanism, namely, after the puncture tip 4 enters the puncture cannula 1, when the puncture body 2 is pressed again by the puncture operating handle 5, the puncture tip 4 can not be punctured from the head end of the puncture cannula 1 again, so that the puncture tip 4 can be prevented from damaging a puncture area, and the protection after puncturing is realized.
As shown in fig. 3 and 8, the puncture cannula 1 is provided with a flexible protective sheath 3 at the end of the head end, and the flexible protective sheath 3 and the puncture cannula 1 are coaxially distributed; in the embodiment of the invention, when the puncture cannula 1 and the puncture body 2 move relatively, the head end of the puncture cannula 1 can enter the puncture area, and in order to protect the puncture area, the head end of the puncture cannula 1 can be provided with the flexible protective sleeve 3, so that when the head end of the puncture cannula 1 enters the puncture area, the flexible protective sleeve 3 is used for protecting the puncture area, and the puncture area is protected. Specifically, set up flexible protective sheath connector 9 at puncture sleeve 1's head end, flexible protective sheath 3 can overlap on flexible protective sheath connector 9, can adopt between flexible protective sheath 3 and the flexible protective sheath connector 9 and dismantle the connection or the fixed connection form, when flexible protective sheath 3 installs the head end at puncture sleeve 1, can not influence puncture tip 4 from puncture sleeve 1 wear out or get into.
Further, the movement driving mechanism comprises an elastic pushing body 7 sleeved on the puncture body 2, the head end of the elastic pushing body 7 can extend into the puncture sleeve 1, the puncture operating handle 5 is positioned outside the tail end of the elastic pushing body 7, the elastic pushing body 7 can be compressed when the puncture body 2 is pressed through the puncture operating handle 5, when the puncture tip 4 penetrates through the puncture area, the elastic pushing body 7 pushes the puncture sleeve 1 forward, so that the puncture sleeve 1 can move relative to the puncture body 2, and the puncture tip 4 of the puncture body 2 enters the puncture sleeve 1.
In the embodiment of the invention, the elastic pushing body 7 is sleeved at the tail part of the puncture body 2, the length of the elastic pushing body 7 is smaller than that of the puncture sleeve 1, and the puncture body 2 is pressed by the puncture operating handle 5, so that the puncture tip 4 punctures, the elastic pushing body 7 can be compressed by penetrating out of the operating handle 5, namely, the elastic pushing body 7 is in a compressed state in the process of puncturing by using the puncture tip 4. When the puncture tip 4 penetrates through the puncture area, the puncture tip 4 and the head end of the puncture cannula 1 are both in a suspended state, and the puncture tip 4 is still under the action of the puncture operation handle 5, at the moment, the elastic pushing body 7 can push the puncture cannula 1 to move towards the puncture area after penetrating due to the action of elastic force generated by compression on the puncture cannula 1, and generally, the head end of the puncture cannula 1 can enter the puncture area after penetrating. After the puncture cannula 1 moves to the penetrated puncture area, the puncture cannula 1 can move relative to the puncture body 2, and after the puncture body 2 and the puncture cannula 1 move relative to each other, the puncture tip 4 at the head end of the puncture body 2 can enter the puncture cannula 1, so that the puncture tip 4 is prevented from damaging the puncture area after puncture. In specific implementation, the elastic pushing body 7 may be a spring, and of course, other elastic devices may also be used, as long as the elastic pushing body 7 can be sleeved on the puncture body 2 and compress the elastic pushing body 7 in the puncture process, which may be specifically selected as required and will not be described herein again.
As shown in fig. 3, 4, 5, 6, 8 and 9, sleeve holes distributed in the puncture sleeve 1 in the length direction are arranged in the puncture sleeve 1, the sleeve holes and the puncture sleeve 1 are coaxially distributed, and the sleeve holes penetrate through the puncture sleeve 1; the sleeve hole comprises a first channel 11 positioned at the front part of the puncture sleeve 1 and a third channel 14 positioned at the rear end of the puncture sleeve 1, the first channel 11 is communicated with the third channel 14 through a second channel 13, the aperture of the third channel 14 is larger than that of the second channel 13, the outer diameter of the elastic push body 7 is smaller than that of the third channel 14 and larger than that of the second channel 13, and after the head end of the elastic push body 7 extends into the puncture sleeve 1, the head end of the elastic push body 7 can abut against the end part of the second channel 13.
In the embodiment of the invention, the aperture of the first channel 11 is larger than the outer diameter of the corresponding area of the puncture body 2, the aperture of the second channel 13 is not smaller than the aperture of the first channel 11, the aperture of the second channel 13 is not larger than the outer diameter of the elastic push body 7, the aperture of the third channel 14 is larger than the outer diameter of the elastic push body 7, the first channel 11, the second channel 13 and the third channel 14 are coaxially distributed, when the head end of the elastic push body 7 extends into the puncture cannula 1 from the tail end of the puncture cannula 1, the head end of the elastic push body 7 can be abutted against the end wall of the second channel 13 by utilizing the matching of the outer diameter of the elastic push body 7 with the second channel 13 and the third channel 14, when the elastic push body 7 is compressed, the elastic push body 7 only can be arranged between the end wall of the puncture operating handle 5 and the end wall of the second channel 13, and only when the head end of the puncture cannula 1 is suspended, the elastic push body 7 can push the puncture cannula 1 to move forwards, and in a non-puncture state or in a puncture process, the elastic push body 7 is sleeved in the puncture body 2 and positioned in the puncture cannula 1, and does not affect any puncture process.
As shown in fig. 9, 10, 11, 12, 13, 15, 17, 18, 19, 20, 21 and 22, the tip lock holding mechanism includes a positioning elastic body 8 capable of protruding from the puncture body 2 and an elastic body accommodating groove 16 for accommodating the positioning elastic body 8, and the positioning elastic body 8 is located between the puncture tip 4 and the puncture operation handle 5 on the puncture body 2;
the inner wall of the puncture cannula 1 is provided with an elastomer positioning groove 12 matched with the positioning elastomer 8, and after the puncture tip 4 penetrates through the region to be punctured and the puncture cannula 1 moves relative to the puncture body 2, the head end of the positioning elastomer 8 can extend into the elastomer positioning groove 12; after the head end of the positioning elastic body 8 can extend into the elastic body positioning groove 12, the puncture body 2 is pressed by the puncture operating handle 5, and the head end of the positioning elastic body 8 can be always positioned in the elastic body positioning groove 12, so that the puncture tip 4 of the puncture body 2 is stably kept in the puncture sleeve 1.
In the embodiment of the present invention, the positioning elastic bodies 8 may be positioning elastic pieces with upward-tilted head ends, the positioning elastic bodies 8 are symmetrically distributed or uniformly distributed on the puncture body 2, and the specific number of the positioning elastic bodies 8 may be selected as required. During specific implementation, the positioning elastic body 8 is closer to the tail part of the puncture body 2, the elastic body accommodating grooves 16 with the same number as the positioning elastic bodies 8 are arranged on the puncture body 2, the elastic body accommodating grooves 16 are concavely arranged on the puncture body 2, the positioning elastic body 8 can be made of elastic materials with memory, and medical materials commonly used in the technical field can be specifically selected and used, and the basic elastic and memory requirements can be mainly met. The head end of the positioning elastic body 8 tilts, namely the positioning elastic body 8 has a state trend of opening outwards on the puncture body 2, when the head end of the positioning elastic body 8 tilts, the head end of the positioning elastic body 8 protrudes out of the surface of the puncture body 2, and when the head end of the positioning elastic body 8 protrudes out of the surface of the puncture body 2, the rest positions of the positioning elastic body 8 are not higher than the surface of the puncture body 2. The tilting of the positioning elastic body 8 specifically means that the positioning elastic body 8 gradually expands outwards along the direction pointing to the head end at the tail end of the positioning elastic body 8, and due to the material property of the positioning elastic body 8, the positioning elastic body 8 can be pressed into the elastic body accommodating groove 16, and when the positioning elastic body 8 is compressed into the elastic body accommodating groove 16, the head end and other positions of the positioning elastic body 8 are not higher than the surface of the puncture body 2. Generally, the head end of the positioning elastic body 8 is in an upward tilted state, and the length of the elastic body accommodating groove 16 on the puncturing body 2 is the same as the length of the positioning elastic body 8, or may be slightly longer than the length of the positioning elastic body 8.
In specific implementation, in order to ensure that the puncture tip 4 enters the puncture cannula 1 through the matching of the positioning elastic body 8 and the puncture cannula 1, the puncture tip 4 can be stabilized in the puncture cannula 1, the inner wall of the puncture cannula 1 is provided with an elastic body positioning groove 12, the elastic body positioning groove 12 is positioned on the side wall in the second channel 13, the length direction of the elastic body positioning groove 12 is consistent with the length direction of the puncture cannula 1, and the length of the elastic body positioning groove 12 is not more than the length of the second channel 13.
The size of the elastomer positioning groove 12 is matched with that of the positioning elastomer 8, and the number of the elastomer positioning grooves 12 is consistent with that of the positioning elastomers 8, namely, the positioning elastomer 8 and the elastomer positioning grooves 12 are in one-to-one corresponding fit. During specific implementation, when the puncture tip 4 penetrates out from the head end of the puncture cannula 1, the head end of the positioning elastic body 8 is compressed in the elastic body accommodating groove 16, or the head end of the positioning elastic body 8 is inwards contracted by utilizing the inner wall of the first channel 11 of the puncture cannula 1, the head end of the positioning elastic body 8 is not higher than the surface of the puncture body 2, the contact between the head end of the positioning elastic body 8 and the inner wall of the first channel 11 of the puncture cannula 1 is avoided, and the influence on the puncture process can be avoided.
After the puncture cannula 1 and the puncture body 2 move relatively, because the puncture cannula 1 moves forward under the action of the elastic pushing body 7, the positioning elastic body 8 and the elastic body positioning groove 12 gradually approach to each other, because the distance between the elastic body positioning groove 12 and the second channel 13 is larger than the aperture of the first channel 11, when the head end of the positioning elastic body 8 enters the second channel 13, the head end of the positioning elastic body 8 recovers the state of tilting and protruding out of the surface of the puncture body 2, and when the head end of the positioning elastic body 8 tilts, the head end of the positioning elastic body 8 can enter the elastic body positioning groove 12. After 8 head ends of location elastomer get into elastomer positioning groove 12, when rethread puncture operation handle 5 pressed puncture body 2, the head end of location elastomer 8 on puncture body 2 can tightly support in elastomer positioning groove 12, utilize the cooperation between elastomer positioning groove 12 and location elastomer 8, can block the motion of puncture body 2 in puncture sleeve pipe 1, can make puncture body 2's puncture point end 4 stably keep in puncture sleeve pipe 1, puncture point end 4 is stable behind puncture sleeve pipe 1, can reach the break-through after, puncture point end 4 is to the possibility of the regional damage of puncture.
In specific implementation, when the puncture body 2 is pressed again by the puncture operating handle 5, in order to enable the positioning elastic body 8 to be stabilized in the elastic body positioning groove 12, the end part of the elastic body positioning groove 12 is provided with a wedge-shaped opening, and the wedge-shaped opening is used for blocking the head end of the positioning elastic body 8 from sliding out of the elastic body positioning groove 12.
In addition, a connecting groove 15 is arranged on the side wall in the third channel 14, and the connecting groove 15 is communicated with both the elastomer positioning groove 12 and the third channel 14, as shown in fig. 6. The width and the like of the connecting groove 15 can be consistent with those of the elastic body positioning groove 12, and when the elastic pushing body 7 is sleeved on the puncture body 2, the connecting groove 15 is positioned outside the elastic pushing body 7, as shown in fig. 9, 19 and 22. The assembly of the puncturing body 2 in the puncturing cannula 1 can be facilitated by the cooperation of the attachment slot 15 with the elastomer positioning groove 12.
Furthermore, a tip unlocking mechanism is also included, by means of which the puncture tip 4, which is held stationary in the puncture cannula 1, can be moved back in the puncture cannula 1;
the tip unlocking mechanism comprises a spring pressing block 6 which is arranged on the puncture operating handle 5 and used for pressing and positioning the elastic body 8, and when the tail part of the elastic body 8 is pressed and positioned by the spring pressing block 6, the positioning elastic body 8 can be inwards contracted in the elastic body accommodating groove 16.
In the embodiment of the present invention, the adaptive connection between the handle connector 17 and the puncture handle 5 includes a fixed or detachable connection between the handle connector 17 and the puncture handle 5, the puncture body 2 is connected to the puncture handle 5 through the handle connector 17, the puncture handle 5 is located at the tail end of the puncture body 2, and generally, the puncture body 2 and the puncture handle 5 are coaxially distributed, as shown in fig. 13 and 15.
Before the puncture operation, the puncture tip 4 at the head end of the puncture body 2 needs to be punctured from the head end of the puncture cannula 1, namely, the head end of the positioning elastic body 8 needs to be positioned in the first channel 11, in order to meet the assembly requirement, the positioning elastic body 8 needs to be prevented from extending into the elastic body positioning groove 12 before the puncture, specifically, a plurality of elastic sheet pressing blocks 6 can be arranged on the puncture operating handle 5, the number of the elastic sheet pressing blocks 6 is consistent with that of the positioning elastic bodies 8, and the tail end of a corresponding positioning elastic body 8 can be pressed by one elastic sheet pressing block 6. When the positioning elastic body 8 is pressed by the elastic piece pressing block 6, the positioning elastic body 8 can be accommodated in the elastic body accommodating groove 16, that is, the head end of the positioning elastic body 8 is not higher than the surface of the puncture body 2, as shown in fig. 13, 15, 17, 18 and 19. When the head end of the positioning elastic body 8 is not higher than the surface of the puncture body 2, when the puncture body 2 is assembled in the puncture cannula 1, the positioning elastic body 8 cannot extend into the elastic body positioning groove 12, and when the head end of the positioning elastic body 8 is positioned in the first channel 11, the elastic sheet pressing block 6 can be loosened, at the moment, the head end of the positioning elastic body 8 is contracted in the first channel 11, the puncture tip 4 cannot be influenced to penetrate out from the head end of the puncture cannula 1, and the subsequent operation of puncturing by using the puncture tip 4 and the relative motion between the puncture cannula 1 and the puncture body 2 cannot be influenced, as shown in fig. 1 and fig. 2.
The puncture operating handle 5 is provided with a pressing block elastic resetting mechanism, after the pressing elastic sheet pressing block 6 is loosened, the pressing block elastic resetting mechanism can reset the elastic sheet pressing block 6 to prepare for the next pressing, and the elastic sheet pressing block 6 is prevented from pressing the end part of the positioning elastic body 8 all the time. When the elastic resetting mechanism is specifically implemented, the elastic resetting mechanism can adopt a spring or a structural form commonly used in the technical field, as long as the working requirement of automatic resetting after the elastic sheet is pressed by the pressing block 6 can be met, and the elastic resetting mechanism is not listed and described in detail herein.
In addition, when the elastic piece pressing block 6 is arranged on the puncture operation handle 5, relative movement is performed between the puncture cannula 1 and the puncture body 2, and after the head end of the positioning elastic body 8 enters the elastic body positioning groove 12, the positioning elastic body 8 can be pressed by the elastic piece pressing block 6 again, so that the positioning elastic body 8 is contracted in the elastic body accommodating groove 16, namely, the head end of the positioning elastic body 8 is separated from the elastic body positioning groove 12, after the positioning elastic body 8 is separated from the elastic body positioning groove 12, the head end of the positioning elastic body 8 can be pushed into the first channel 11, namely, the puncture tip 4 penetrates out of the head end of the puncture cannula 1 again, and when the puncture tip 4 penetrates out of the head end of the puncture cannula 1 again, required puncture operation can be repeatedly performed by using the puncture tip 4. Of course, after the head end of the positioning elastic body 8 extends into the elastic body positioning groove 12, and when the puncture is not needed again, the elastic sheet pressing block 6 does not need to be pressed, and only the head end of the positioning elastic body 8 needs to be kept extending into the elastic body positioning groove 12, so that the risk of damage to the puncture area or other positions after the puncture tip 4 penetrates out from the head end of the puncture cannula 1 is avoided.
As shown in fig. 3, 7, 8, 14, 20 and 23, the puncture handle 5 is provided with a connection positioning hole 18 fitted to the handle positioning piece 10 in the handle positioning piece 10 at the trailing end of the puncture cannula 1, and the puncture handle 5 is attached to the trailing end of the puncture cannula 1 by the engagement of the handle positioning piece 10 with the connection positioning hole 18 and is linearly movable at the trailing end of the puncture cannula 1 by the guidance of the handle positioning piece 10.
In the embodiment of the invention, the operating handle positioning sheet 10 is arranged at the tail end of the puncture cannula 1, the length direction of the operating handle positioning sheet 10 is consistent with the direction of the puncture cannula 1, the puncture operating handle 5 is provided with the connecting positioning holes 18, and the shape, the size and the number of the connecting positioning holes 18 are matched with the operating handle positioning sheet 10. The puncture operation handle 5 can move along the operation positioning piece 10 after being mounted on the operation handle positioning piece 10 by the connection positioning hole 18, and when the operation handle 5 moves linearly along the operation positioning piece 10, the puncture body 2 can be pressed or the puncture body 2 can be pulled out from the puncture cannula 1.
During specific implementation, when the puncture operating handle 5 is installed at the end of the puncture cannula 1 through the operating handle positioning piece 10, the elastic pushing body 7 is located between the operating handle positioning pieces 10, and the distribution positions of the operating handle positioning pieces 10 and the like are subject to the operation of the elastic piece pressing block 6 on the puncture operating handle 5, which is not described in detail.
As shown in fig. 24 and 25, for another implementation structure of the present invention, a tip unlocking mechanism different from that of embodiment 1 is adopted, wherein the tip unlocking mechanism includes an unlocking rod 19 capable of extending into the puncture body 2, a head of the unlocking rod 19 is provided with a magnetic adsorber 20, and when the unlocking rod 19 extends into the puncture body 2, the magnetic adsorber 20 can make the positioning elastic body 8 be attracted and contracted into the elastic body accommodating groove 16.
In the embodiment of the invention, an unlocking rod hole 22 is arranged in the puncture body 2, the unlocking rod hole 22 allows the unlocking rod 19 to extend, the unlocking rod hole 22 and the puncture body 2 are coaxially distributed, and the length of the unlocking rod hole 22 is smaller than that of the puncture body 2. When the lock release lever 19 is separated from the puncture body 2, the specific processes of the puncture body 2, the positioning elastic body 8, and the puncture cannula 1, such as the specific mating puncture, are consistent with the above-described working processes, and reference may be made to the above description for details, which are not described herein again.
After puncturing by the puncturing body 2, the puncturing tip 4 is kept in the puncturing cannula 1 by the positioning elastic body 8 matching with the puncturing cannula 1, in order to make the puncturing body 2 move in the puncturing cannula 1 again, that is, the puncturing tip 4 passes out from the head end of the puncturing cannula 1 again, the unlocking rod 19 can be inserted into the unlocking rod hole 22 of the puncturing body 2, when the magnetic adsorbing body 20 corresponds to the positioning elastic body 8, the positioning elastic body 8 can be contracted in the elastic body accommodating groove 16 after being adsorbed by the magnetic adsorbing body 20, that is, the positioning elastic body 8 is in a non-tilting state and connected with the puncturing cannula 1, at this moment, the puncturing body 2 can move in the puncturing cannula 1 again, that is, the puncturing tip 4 at the head end of the puncturing body 2 can pass out from the puncturing cannula 1, and the required puncturing operation is facilitated.
In specific implementation, the magnetic adsorbent 20 may be an electromagnet or other magnetic material, the positioning elastic body 8 is a magnetic material, the magnetic adsorption force between the magnetic adsorbent 20 and the positioning elastic body 8 can make the positioning elastic body 8 inwardly shrink into the elastic body accommodating groove 16, and the magnetic acting force between the magnetic adsorbent 20 and the positioning elastic body 8 is set to be known to those skilled in the art as long as the magnetic adsorption force can satisfy the adsorption of the positioning elastic body 8. When the positioning elastic body 8 is contracted in the elastic body accommodating groove 16 and the puncture tip 4 passes through the puncture cannula 1, the unlocking rod 19 can be moved out of the puncture body 2, i.e. the cooperation between the puncture body 2 and the puncture cannula 1 is not influenced, and the cooperation between the positioning elastic body 8 and the puncture cannula 1 is not influenced to realize the locking of the puncture tip 4 during the re-puncture. The end of the unlocking rod 19 is provided with an unlocking rod handle 21, and the unlocking rod handle 21 can be used for facilitating the insertion and the removal of the unlocking rod 19 in the puncture body 2.
As shown in fig. 26 and 27, in a third embodiment of the present invention, a different structure form is adopted for the positioning elastic body 8 of the tip locking mechanism in embodiment 1, specifically, the positioning elastic body 8 is in a column shape, and the positioning elastic body 8 is installed in the elastic body accommodating groove 16 through the positioning spring 24;
the elastomer positioning groove 12 penetrates through the puncture cannula 1, and the positioning elastomer 8 protrudes out of the puncture body 2 through the positioning spring 24 and can extend into the elastomer positioning groove 12.
In this embodiment, the length direction of the elastic body accommodating groove 16 and the length direction of the puncturing body 2 form an included angle, the included angle is 60 ° to 120 °, generally, the length direction of the elastic body accommodating groove 16 and the length direction of the puncturing body 2 can be perpendicular to each other, the number of the elastic body accommodating grooves 16 and the number of the positioning elastic bodies 8 provided in the puncturing body 2 can be set as required, and the positioning elastic bodies 8 and the elastic body accommodating grooves 16 are distributed in a one-to-one correspondence manner. One end of the positioning spring 24 is fixed at the bottom of the elastic body accommodating groove 16, the other end of the positioning spring 24 is connected with the columnar positioning elastic body 8, the length of the positioning elastic body 8 is smaller than the depth of the elastic body accommodating groove 16, the elastic body accommodating groove 16 extends inwards at the side wall of the puncture body 2, and the depth of the elastic body accommodating groove 16 is smaller than the diameter of the puncture body 2. When the positioning elastic body 8 is used to make the positioning spring 24 in a compressed state, the positioning elastic body 8 can be completely located in the elastic body accommodating groove 16 or slightly protruded out of the elastic body accommodating groove 16.
Generally, before piercing the region to be pierced with the piercing tip 4, the positioning spring 24 needs to be compressed by the positioning elastomer 8, so that the piercing body 2 can move within the piercing cannula 1, and the pressure of the positioning elastomer 8 against the positioning spring 24 can be provided by the contact of the inner wall of the piercing cannula 1 with the positioning elastomer 8. When the puncture area is penetrated by the puncture tip 4, the puncture cannula 1 moves relative to the puncture body 2, when the positioning elastic body 8 moves to the position corresponding to the elastic body positioning groove 12, because the positioning elastic body 8 is not contacted with the inner wall of the puncture cannula 1, the positioning spring 24 pushes the positioning elastic body 8 to move, so that the positioning elastic body 8 extends into the elastic body positioning groove 12, the elastic body positioning groove 12 penetrates through the puncture cannula 1, and the elastic body positioning groove 12 and the positioning elastic body 8 are in one-to-one correspondence or the number of redundant positioning elastic bodies 8. After the positioning elastic body 8 extends into the elastic body positioning groove 12, the length direction of the positioning elastic body 8 is perpendicular to the movement direction of the puncture body 2, the elastic body positioning groove 12 is matched with the positioning elastic body 8, the relative movement between the puncture sleeve 1 and the puncture body 2 can be blocked, namely, when the puncture body 2 is pressed by the puncture operating handle 5, the positioning elastic body 8 can be always positioned in the elastic body positioning groove 12, and therefore the puncture tip 4 of the puncture body 2 can be stably kept in the puncture sleeve 1.
When the positioning elastic body 8 is located in the elastic body positioning groove 12 and the puncturing body 2 needs to be used again for puncturing, the positioning elastic body 8 needs to be pressed, so that the positioning elastic body 8 compresses the positioning spring 24, so that the positioning elastic body 8 is located below the elastic body positioning groove 12, namely, the upper end of the positioning elastic body 8 is not in contact with the elastic body positioning groove 12, at this time, when the puncturing body 2 is pressed by the puncturing operation handle 5, the puncturing body 2 moves in the puncturing sleeve 1, the positioning elastic body 8 is far away from the corresponding elastic body positioning groove 12, the head end of the positioning elastic body 8 can slightly protrude out of the elastic body accommodating groove 16 or be located in the elastic body accommodating groove 16 by utilizing the contact between the inner wall of the puncturing sleeve 1 and the positioning elastic body 8, and then when the puncturing body 2 is pressed by the puncturing operation handle 5 again, the puncturing tip 4 of the puncturing body 2 can penetrate out of the puncturing sleeve 1, so as to carry out the needed puncturing operation.
In addition, the puncture body 2 can be further provided with a limit step 23, the position of the puncture body 2 relative to the puncture cannula 1 can be limited by the limit step 23, namely, the length of the puncture tip 4 protruding out of the puncture cannula 1 can be effectively limited when the puncture body 2 is pressed by the puncture operating handle 5. For the specific matching between the puncture cannula 1 and the puncture body 2 and other working processes, reference may be made to the descriptions of the above embodiments 1 and 2, and further description is not repeated here
According to the puncture device, the puncture body 2 is arranged in the puncture sleeve 1, when the puncture tip 4 of the puncture body 2 penetrates out of the head end of the puncture sleeve 1, puncture of a region to be punctured can be realized after the puncture tip 4 penetrates through the puncture region through the puncture operation handle 5, the puncture body 2 and the puncture sleeve 1 move relatively, the puncture tip 4 of the puncture body 2 enters the puncture sleeve 1, the puncture tip 4 can be stabilized in the puncture sleeve 1 by utilizing the matching between the positioning elastic body 8 and the elastic body positioning groove 12, protection after puncture is realized, and the risk that the puncture tip 4 brings extra damage after puncture is avoided; utilize puncture operating handle 5 to go up shell fragment and press movable block 6 and can press location elastomer 8 for location elastomer 8 is accomodate in elastomer and is returned and accomodate groove 16, with the operation demand that satisfies many times puncture, compact structure, use convenient operation, accommodation is wide, safe and reliable.
Claims (7)
1. A self-retracting puncture core is characterized in that: the puncture device comprises a puncture cannula (1) and a puncture body (2) positioned in the puncture cannula (1), wherein the head end of the puncture body (2) is provided with a puncture tip (4), the tail end of the puncture body (2) is connected with a puncture operating handle (5), the puncture tip (4) at the head end of the puncture body (2) can penetrate out from the head end of the puncture cannula (1), and the puncture operating handle (5) is positioned at the tail end of the puncture cannula (1); the device also comprises a motion driving mechanism and a tip locking and retaining mechanism;
when the puncture body (2) is pressed by the puncture operating handle (5), the puncture tip (4) of the puncture body (2) penetrates out of the head end of the puncture cannula (1) so as to perform the needed puncture operation by utilizing the puncture tip (4) penetrating out of the head end of the puncture cannula (1); when the puncture tip (4) penetrates through the area to be punctured, the puncture cannula (1) is driven to move relative to the puncture body (2) through the movement driving mechanism, so that the puncture tip (4) of the puncture body (2) can immediately enter the puncture cannula (1); after the puncture tip (4) enters the puncture cannula (1), the puncture tip (4) of the puncture body (2) is stably kept in the puncture cannula (1) by using a tip locking and keeping mechanism;
the end part of the head end of the puncture cannula (1) is provided with a flexible protective sleeve (3), and the flexible protective sleeve (3) and the puncture cannula (1) are coaxially distributed; the puncture body (2) and the puncture cannula (1) are coaxially distributed;
the tip locking and retaining mechanism comprises a positioning elastic body (8) capable of protruding out of the puncture body (2) and an elastic body accommodating groove (16) for accommodating the positioning elastic body (8), and the positioning elastic body (8) is positioned between the puncture tip (4) and the puncture operating handle (5) on the puncture body (2);
the inner wall of the puncture sleeve (1) is provided with an elastomer positioning groove (12) matched with the positioning elastomer (8), and after the puncture tip (4) penetrates through the region to be punctured and the puncture sleeve (1) moves relative to the puncture body (2), the head end of the positioning elastomer (8) can extend into the elastomer positioning groove (12); when the head end of the positioning elastic body (8) can extend into the elastic body positioning groove (12) and then the puncture body (2) is pressed through the puncture operating handle (5), the head end of the positioning elastic body (8) can be always positioned in the elastic body positioning groove (12), so that the puncture tip (4) of the puncture body (2) is stably kept in the puncture sleeve (1);
the movement driving mechanism comprises an elastic pushing body (7) sleeved on the puncture body (2), the head end of the elastic pushing body (7) can extend into the puncture sleeve (1), the puncture operating handle (5) is located outside the tail end of the elastic pushing body (7), the elastic pushing body (7) can be compressed when the puncture body (2) is pressed through the puncture operating handle (5), the puncture sleeve (1) is pushed forwards by the elastic pushing body (7) when the puncture tip (4) penetrates through a puncture area, so that the puncture sleeve (1) can move relative to the puncture body (2), and the puncture tip (4) of the puncture body (2) enters the puncture sleeve (1).
2. The self-retracting piercing core of claim 1, wherein: a tip unlocking mechanism is also included, by means of which the puncture tip (4) stably held in the puncture cannula (1) can be moved back in the puncture cannula (1).
3. The self-retracting piercing core of claim 2, wherein: location elastomer (8) are the location shell fragment of head end perk, most advanced release mechanism presses piece (6) including setting up the shell fragment that is used for pressing location elastomer (8) on puncture handle (5), utilizes the shell fragment to press when piece (6) press the afterbody of pressing location elastomer (8), can make location elastomer (8) inwards contract in elastomer retainment groove (16).
4. The self-retracting piercing core of claim 2, wherein: location elastomer (8) are the location shell fragment of head end perk, sharp-end unlocking mechanism is including unblock pole (19) that can stretch into in puncture body (2), the head of unblock pole (19) sets up magnetic adsorption body (20), and when unblock pole (19) stretched into puncture body (2), magnetic adsorption body (20) can make location elastomer (8) adsorb the shrink in elastomer retainment groove (16).
5. The self-retracting piercing core of claim 1, wherein: the tail end of the puncture sleeve (1) is provided with a positioning piece (10) of an operating handle at the tail end of the puncture sleeve (1), the puncture operating handle (5) is provided with a connecting positioning hole (18) matched with the positioning piece (10) of the operating handle, the puncture operating handle (5) is arranged at the tail end of the puncture sleeve (1) by the matching of the positioning piece (10) of the operating handle and the connecting positioning hole (18), and can linearly move at the tail end of the puncture sleeve (1) under the guidance of the positioning piece (10) of the operating handle.
6. The self-retracting piercing core of claim 1, wherein: sleeve holes distributed in the length direction of the puncture sleeve (1) are formed in the puncture sleeve (1), the sleeve holes and the puncture sleeve (1) are coaxially distributed, and the sleeve holes penetrate through the puncture sleeve (1);
the puncture cannula comprises a first channel (11) located at the front part of the puncture cannula (1) and a third channel (14) located at the rear end of the puncture cannula (1), the first channel (11) is communicated with the third channel (14) through a second channel (13), the aperture of the third channel (14) is larger than that of the second channel (13), the outer diameter of the elastic pushing body (7) is smaller than that of the third channel (14) and larger than that of the second channel (13), and after the head end of the elastic pushing body (7) extends into the puncture cannula (1), the head end of the elastic pushing body (7) can abut against the end part of the second channel (13).
7. The self-retracting piercing core of claim 1, wherein: the positioning elastic body (8) is columnar, and the positioning elastic body (8) is arranged in the elastic body accommodating groove (16) through a positioning spring (24);
the elastomer positioning groove (12) penetrates through the puncture sleeve (1), and the positioning elastomer (8) protrudes out of the puncture body (2) through the positioning spring (24) and can extend into the elastomer positioning groove (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710765115.3A CN107320161B (en) | 2017-08-30 | 2017-08-30 | Self-retraction puncture core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710765115.3A CN107320161B (en) | 2017-08-30 | 2017-08-30 | Self-retraction puncture core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107320161A CN107320161A (en) | 2017-11-07 |
| CN107320161B true CN107320161B (en) | 2023-03-10 |
Family
ID=60204069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710765115.3A Active CN107320161B (en) | 2017-08-30 | 2017-08-30 | Self-retraction puncture core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107320161B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107898491B (en) * | 2017-12-13 | 2023-11-24 | 无锡华纳医疗科技有限公司 | Safety puncture core |
| CN110448365A (en) * | 2019-09-11 | 2019-11-15 | 自贡市第一人民医院 | Subtract hole laparoscope puncture outfit with protective case |
| CN111772741A (en) * | 2020-07-07 | 2020-10-16 | 无锡圣诺亚科技有限公司 | Safety pneumoperitoneum needle capable of self-locking |
| CN112971937B (en) * | 2021-02-25 | 2022-10-18 | 祝恒 | Puncture catheter needle assembly suitable for continuous nerve block |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5246425A (en) * | 1992-09-21 | 1993-09-21 | Daniel Hunsberger | Trocar and cannula assembly |
| CN105559859A (en) * | 2016-03-14 | 2016-05-11 | 无锡市瑞源普斯医疗器械有限公司 | Puncture cone component of disposable puncture outfit |
| CN106618687A (en) * | 2016-12-09 | 2017-05-10 | 成都五义医疗科技有限公司 | Tactile feedback type puncture needle |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204734812U (en) * | 2015-06-19 | 2015-11-04 | 南京大学医学院附属鼓楼医院 | Endometrium scar puncture syringe needle |
-
2017
- 2017-08-30 CN CN201710765115.3A patent/CN107320161B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5246425A (en) * | 1992-09-21 | 1993-09-21 | Daniel Hunsberger | Trocar and cannula assembly |
| CN105559859A (en) * | 2016-03-14 | 2016-05-11 | 无锡市瑞源普斯医疗器械有限公司 | Puncture cone component of disposable puncture outfit |
| CN106618687A (en) * | 2016-12-09 | 2017-05-10 | 成都五义医疗科技有限公司 | Tactile feedback type puncture needle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107320161A (en) | 2017-11-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107320161B (en) | Self-retraction puncture core | |
| US5261891A (en) | Trocar | |
| US5104382A (en) | Trocar | |
| CN109009255B (en) | Sliding suture grasper | |
| US5248298A (en) | Insert for shielded trocar | |
| US6030402A (en) | Apparatus and methods for the penetration of tissue, and the creation of an opening therein | |
| US5295993A (en) | Safety trocar | |
| EP2486879B1 (en) | Guide device | |
| CN107898491B (en) | Safety puncture core | |
| EP0495633A1 (en) | Knife for surgical trocar | |
| CN107361829B (en) | Self-retraction puncture core structure | |
| KR20040104489A (en) | Safety trocar with progressive cutting tip guards and gas jet tissue deflector | |
| JPH11504234A (en) | Shrinkable safety insert with laterally expandable spring strip | |
| JP2008538713A (en) | Cannula with introducer, needle protector and blood collection system | |
| CN106377304B (en) | Button-driven automatic movement protection puncture needle | |
| US7811293B2 (en) | System and method for rapid placement of chest tubes | |
| WO2018103570A1 (en) | Two-half and dual-mode bladeless puncture needle, and trocar | |
| CN203029310U (en) | Round tube shaped anastomat | |
| CN203029311U (en) | Operation handle and round pipe type anastomat with same | |
| CN203029305U (en) | Operation handle and round pipe type anastomat with same | |
| KR101511171B1 (en) | Dual cylinder type biopsy device | |
| CN208274606U (en) | Safety-type puncture core | |
| CN207804347U (en) | Core is punctured from retraction | |
| EP1599143A2 (en) | System and method for rapid placement of chest tubes | |
| CN203029309U (en) | Indicator component and pipe-type anastomat with same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200102 Address after: 214000 A1, fifth floor, standard workshop of Wuxi Liyuan Development Zone, Wuxi, Jiangsu Applicant after: WUXI HUANA MEDICAL TECHNOLOGY CO.,LTD. Address before: 214171 Jiangsu city of Wuxi province standard Binhu District Liyuan Development Zone building three floor A3 building Applicant before: WUXI HOLY NOAH TECHNOLOGY Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |