CN215778274U - Spring negative pressure type cell biopsy needle - Google Patents
Spring negative pressure type cell biopsy needle Download PDFInfo
- Publication number
- CN215778274U CN215778274U CN202121857974.3U CN202121857974U CN215778274U CN 215778274 U CN215778274 U CN 215778274U CN 202121857974 U CN202121857974 U CN 202121857974U CN 215778274 U CN215778274 U CN 215778274U
- Authority
- CN
- China
- Prior art keywords
- spring
- hollow cylinder
- piston
- biopsy needle
- negative pressure
- 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
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model discloses a spring negative pressure type cell biopsy needle. The cell biopsy needle mainly comprises a needle head, a hollow cylinder, a piston shaft and a piston handle, wherein the side surface of the piston is hermetically connected with the inner wall of the hollow cylinder; a fixing piece is arranged on the inner wall of the bottom of the hollow cylinder, a hole is formed in the middle of the fixing piece, and a space enclosed by the bottom of the hollow cylinder and the fixing piece is used for storing a tissue sample; set up the spring in empty section of thick bamboo, the one end of spring is fixed on the side of keeping away from empty section of thick bamboo bottom surface in the stationary blade, and the piston is connected to the other end of spring, when the spring extension, can promote the piston and remove to empty section of thick bamboo outside. The spring in the utility model pushes the piston to move by means of the self elasticity, so that negative pressure is generated in the hollow cylinder of the cell biopsy needle, and the suction effect is realized. Thereby reducing the operation difficulty of the doctor and improving the working efficiency of the doctor. In addition, the tissue storage bin is arranged in the utility model, so that the tissue sucked by the piston can be prevented from contacting the piston and being polluted.
Description
Technical Field
The utility model belongs to the technical field of medical instruments, and particularly relates to a spring negative pressure type cell biopsy needle.
Background
The cytopathology puncture technique is one of the commonly used cytopathology techniques, and mainly comprises the puncture sampling of superficial layer or middle layer packet mass of the body surface by a fine needle. The cytological puncture has the advantages of small wound, low cost, simple and quick operation and the like, and the cytological puncture is more and more widely applied along with the development of cytological diagnosis technology.
During existing lancing procedures, such as needle aspiration cytology of the thyroid or breast, a physician typically needs to stabilize the syringe with one hand, hold the plunger handle with the other hand, and then pull outward with force to aspirate a tissue sample. The operation easily causes the fatigue of doctors, increases the difficulty of the operation and reduces the work efficiency of the doctors. Even the sampling can be completed by puncturing for many times, thereby increasing the workload of doctors and bringing physical and psychological pains to patients. In addition, this sampling method is prone to cause tissue to stick to the syringe tube wall, resulting in loss, and tissue contamination due to contact with the plunger.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a spring negative pressure type cell biopsy needle which mainly comprises a needle head, a hollow cylinder, a piston shaft and a piston handle,
the side surface of the piston is hermetically connected with the inner wall of the hollow cylinder;
a fixing piece is arranged on the inner wall of the bottom of the hollow cylinder, a hole is formed in the middle of the fixing piece, and a space defined by the bottom of the hollow cylinder and the fixing piece is used for storing a tissue sample;
the hollow cylinder is internally provided with a spring, one end of the spring is fixed on the side surface, far away from the bottom surface of the hollow cylinder, in the fixing piece, and the other end of the spring is connected with the piston.
Preferably, the stationary blade is the ring shape, the central axis of ring with the axis coincidence of piston shaft, the excircle of ring closely laminates on the empty section of thick bamboo inner wall.
Preferably, a breathable film is further arranged in the cell biopsy needle, and the breathable film is attached to the side face, facing the nipple, of the fixing sheet.
Preferably, the cell biopsy needle is further provided with an elastic bulge, and the elastic bulge is fixed on the inner wall of the hollow barrel opposite to the side face of the spring;
when the elastic bulge extends, the top end of the elastic bulge contacts the spring and can clamp the spring, so that the spring is in a compressed state;
when the elastic bulge contracts, the top end of the elastic bulge is mutually separated from the spring, so that the spring is in an extension state.
Preferably, the elastic protrusions are symmetrically disposed at both sides of the spring axis.
Preferably, the axis of the spring is coincident with the axis of the piston shaft, and the number of the elastic bulges positioned on the same side of the axis of the spring is at least 1;
when the number of the elastic bulges positioned on the same side of the axis of the spring is more than or equal to 3, the elastic bulges are arranged at equal intervals along the parallel line of the axis of the spring.
Preferably, a pressure lever and a pressure lever handle are further arranged in the cell biopsy needle;
the compression bar is tightly attached to the inner wall of the hollow cylinder, the compression bar is parallel to the axis of the piston shaft, one end of the compression bar is positioned between the piston and the hollow cylinder, and the compression bar, the hollow cylinder and the piston are sealed;
the pressure lever handle is connected with the other end of the pressure lever;
the hollow cylinder is provided with a groove, and the pressure rod handle can slide along the axial direction of the piston shaft;
when the pressure rod handle slides to the bottom of the hollow cylinder along the groove, the pressure rod can be pushed to slide to the bottom of the hollow cylinder.
Preferably, the compression bar and the elastic bulge are positioned on the same straight line, and when the compression bar contacts the elastic bulge, the compression bar can extrude the elastic bulge, so that the elastic bulge is in a contraction state.
Preferably, the included angle between the pressure rod handle and the pressure rod is 90-120 degrees.
Preferably, the compression rods are symmetrically arranged on both sides of the piston shaft.
The utility model has the following beneficial effects:
on one hand, in the process of carrying out needle aspiration cytology examination and sampling, because the spring is arranged in the utility model, the spring can push the piston to move by means of the elasticity of the spring, so that negative pressure is generated in the hollow cylinder of the cell biopsy needle, and the aspiration effect is realized. This design avoids the need for the physician to grasp the empty barrel of the syringe with one hand and pull the plunger handle forcefully with the other hand to take a sample. Thereby reducing the operation difficulty of the doctor and improving the working efficiency of the doctor.
On the other hand, the tissue storage bin is arranged in the syringe, so that the tissue sample can be prevented from being polluted due to the fact that the sucked tissue sample contacts the piston, and the tissue sample can be prevented from being stained on the inner wall of the empty cylinder of the syringe to cause loss.
Drawings
FIG. 1 is a schematic cross-sectional view of a spring negative pressure type biopsy needle according to the present invention;
the parts in the figure are labeled as follows: 101-piston handle, 102-piston shaft, 103-support frame, 104-hollow cylinder, 105-press rod handle, 106-press rod, 107-piston, 108-spring, 109-elastic bulge, 110-sealing plug, 111-fixing piece, 112-air-permeable membrane, 113-nipple and 114-needle.
Fig. 2 is a schematic view of the spring of the present invention when it is extended.
Detailed Description
The following clearly and completely describes the design scheme in the embodiment of the present invention with reference to the drawings in the embodiment of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the utility model, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The inventor designs a spring negative pressure type cell biopsy needle according to the operation characteristics of acupuncture cytology examination, adopts the elasticity of a spring to push a syringe piston to move outwards, thereby generating negative pressure at the bottom of a syringe hollow cylinder and realizing the suction effect. The spring negative pressure type cell biopsy needle is used for acupuncture cytology examination, reduces the operation difficulty of doctors, effectively improves the work efficiency of the doctors, avoids tissue samples from contacting the piston and being polluted, and prevents the tissue samples from contacting the inner wall of the empty syringe barrel to cause loss.
Fig. 1 shows an embodiment of a spring negative pressure type cell biopsy needle of the present invention, which consists of a syringe and a needle 114. The syringe mainly comprises an empty cylinder 104, a piston 107, a piston shaft 102 and a piston handle 101. The side surface of the piston 107 is hermetically connected to the inner wall of the hollow cylinder 104, so that a sealed space can be formed at the bottom of the hollow cylinder 104. In order to prevent the piston shaft 102 from deviating from the axis of the piston shaft 102 when moving in the hollow cylinder 104, a support frame 103 is provided on the top of the hollow cylinder 104, and preferably, a circular hole is formed in the middle of the support frame 103, and the inner diameter of the circular hole is equal to or slightly larger than the outer diameter of the piston shaft 102. The axis of the circular hole coincides with the axis of the piston shaft 102. The piston shaft 102 is slidable along the axis of the circular bore.
As shown in FIG. 1, a tissue storage chamber for storing a tissue sample is provided at the bottom of the hollow cylinder, and is defined by a bottom surface of the hollow cylinder, a side wall of the hollow cylinder, and a fixing piece 111. The fixing piece 111 is disposed on the inner wall of the hollow tube 104, preferably, the edge of the fixing piece is closely attached to the inner wall of the hollow tube 104, or the fixing piece 111 and the hollow tube 104 are integrally formed. The middle portion of the fixing piece 111 is perforated. The shape of the fixing piece 111 is preferably circular, the central axis of the circular ring coincides with the axis of the piston shaft 102, and the outer circle of the circular ring is preferably in close contact with the inner wall of the hollow cylinder. The side of the fixing piece 111 facing the nipple 113 of the empty tube is attached with a gas-permeable membrane 112, the gas-permeable membrane 112 does not allow liquid and solid molecules to pass through, but only allows gas molecules to pass through freely, thereby isolating the sucked tissue sample in the tissue storage bin.
As shown in fig. 1, a spring 108 is attached to a side surface of the fixing piece 111 away from the bottom surface of the hollow tube 104, and preferably, one end of the spring 108 is fixed to the fixing piece 111. The other end of the spring 108 is connected to the piston 107, and preferably, the other end of the spring 108 is fixed to the piston 107. When the spring 108 is extended, since the position of the fixing piece 111 is not changed, the spring 108 pushes the piston 107 to move to the outside of the hollow cylinder 104 in the axial direction of the piston shaft 102 by its own elastic force. The bottom space of the hollow cylinder 104 is enlarged, and when the needle tip opening of the needle 114 is positioned inside the body tissue, the bottom of the hollow cylinder 104 forms a negative pressure space, thereby sucking the body tissue into the tissue storage chamber.
As shown in fig. 1, in order to effectively control the compression and extension of the spring 108, elastic protrusions 109 are provided on the inner wall of the hollow cylinder opposite to the side of the spring. When the elastic protrusion 109 is extended, the top end thereof contacts and catches the spring 108, so that the spring 108 is in a compressed state, and when the elastic protrusion 109 is contracted, the top end thereof is disengaged from the spring 108, so that the spring 108 is gradually extended from the compressed state to a natural state. The resilient protrusions 109 are preferably cones or triangles. The elastic protrusions 109 are preferably symmetrically disposed on both sides of the spring axis, so that the control point of the spring is symmetrical, and it is more advantageous to prevent the spring 108 from being deformed away from the axial direction thereof. At least one elastic projection 109 is preferably provided on the side of the spring axis. In order to achieve the stepwise extension of the spring 108, two or more elastic protrusions 109 may be provided on one side of the spring axis, and the specific number is determined according to the number of times of actually controlling the extension of the spring. When the number of the elastic protrusions on one side of the spring axis is more than or equal to 3, the elastic protrusions 109 are preferably arranged on a parallel line of the spring axis, and if the spring needs to be extended at equal intervals, the intervals between the adjacent elastic protrusions 109 are the same.
As shown in FIG. 1, in order to effectively control the expansion and contraction of the elastic protrusion 109, a pressing rod 106 is disposed against the inner wall side of the hollow cylinder, preferably, the pressing rod 106 is parallel to the axis of the piston shaft 102. One end of the pressure rod 106 is located between the piston 107 and the hollow cylinder 104, and the three are in sealed contact, and can be sealed by applying sealing oil or a sealing ring. The other end of the pressure lever 106 is connected with the pressure lever handle 105, or the pressure lever 106 and the pressure lever handle 105 are integrally formed. When the press rod handle 105 slides, the press rod 106 can be driven to slide synchronously. In order to slide the plunger 106 along the inner wall of the hollow cylinder, a groove is formed in the hollow cylinder 104 so that the plunger shank 105 can slide in the groove in the axial direction of the piston shaft 102. When the lever handle 105 slides along the groove toward the bottom of the hollow cylinder 104, the lever 106 is pushed by the lever handle 105 and also slides toward the bottom of the hollow cylinder 104. The included angle between the pressing rod handle 105 and the pressing rod 106 is preferably 90-120 degrees, and more preferably 90 degrees, so that the pressing rod handle 105 can more effectively push the pressing rod 106 to move. The plunger 106 and the plunger stem 105 are preferably symmetrically disposed on both sides of the axis of the piston shaft 102, and the length of the plunger 106 in the direction of the axis of the piston shaft 102 is greater than the length of the spring 108 in the direction of the axis of the spring in its natural state. The bottom surface of the end of the plunger 106 near the piston 107 is preferably flush with the end surface of the piston 107.
As shown in FIG. 1, the pressing rod 106 is aligned with the elastic protrusion 109, and when the pressing rod 106 is pushed by the pressing rod handle 105 to slide toward the fixing piece 111, it can contact the elastic protrusion 109 to press the elastic protrusion 109, so that the elastic protrusion 109 contracts. Causing the elastic projection 109 to disengage from the spring 108 and the spring 108 to expand, pushing the piston 107 towards the outside of the empty cartridge 104.
As shown in fig. 1, a hole is opened on the side wall of the hollow tube 104 near the joint of the spring 108 and the fixing plate 111, and a sealing plug 110 is disposed on the hole to control the opening or closing of the hole. In addition, a short pipe can be arranged on the hole, one end of the short pipe is opened in the hollow cylinder 104, the other end of the short pipe extends out of the hollow cylinder 104, and a sealing cover or a sealing plug is arranged on a pipe opening of the short pipe outside the hollow cylinder 104 to control the opening or closing of the short pipe.
The spring negative pressure type biopsy needle of the present invention has three states. In the initial state (see fig. 1), the pressing rod handle 105 is located at the top end of the groove, the spring 108 is in a compressed state, the elastic protrusion 109 is in an extended state and catches the compressed spring 108, and the sealing plug 110 closes the hole on the side wall of the empty cylinder 104. In the state of sucking the sample (see fig. 2), the pressing rod handle 105 slides towards the bottom of the hollow cylinder 104, the elastic protrusion 109 is gradually compressed, the spring 108 is gradually changed from the compressed state to the extended state, the piston 107 is gradually moved towards the outside of the hollow cylinder 104, and the sealing plug 110 closes the hole on the hollow cylinder 104. In the sampling completion state, the pressing rod 105 is located at the lowest end of the groove, the spring 108 is in a natural extension state, the sealing plug 110 is opened, the hole on the hollow cylinder 104 is opened, and the negative pressure at the bottom of the hollow cylinder 104 is eliminated.
When a doctor uses the cell biopsy needle to perform needle aspiration cytology examination, the type of the syringe and the type of the needle head are selected firstly, then the sterilized syringe and the needle head are connected together, and then the thumb and the forefinger are used for puncturing the needle head into a sampling part. Next, the doctor places the syringe at the first web site, and uses the middle finger to assist in stabilizing the syringe, and pushes the pressure lever handle with the thumb, so that the pressure lever slides towards the elastic protrusion, contacts and extrudes the elastic protrusion, and further the spring in the initial compression state is separated from the control of the elastic protrusion, stretches gradually and pushes the piston to move towards the outside of the hollow cylinder, so that negative pressure is generated in the tissue storage bin, and a tissue sample is sucked into the tissue storage bin, thereby completing the sampling operation. The doctor can then perform follow-up operations such as smear, microscopy and the like.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It will be apparent to those skilled in the art that improvements and modifications may be made without departing from the principles of the utility model and are intended to be within the scope of the utility model.
Claims (10)
1. The utility model provides a spring negative pressure formula cell biopsy needle, its mainly comprises syringe needle, empty section of thick bamboo, piston shaft and piston handle, its characterized in that:
the side surface of the piston is hermetically connected with the inner wall of the hollow cylinder;
a fixing piece is arranged on the inner wall of the bottom of the hollow cylinder, a hole is formed in the middle of the fixing piece, and a space defined by the bottom of the hollow cylinder and the fixing piece is used for storing a tissue sample;
the hollow cylinder is internally provided with a spring, one end of the spring is fixed on the side surface, far away from the bottom surface of the hollow cylinder, in the fixing piece, and the other end of the spring is connected with the piston.
2. The spring negative pressure cell biopsy needle of claim 1, wherein:
the stationary blade is the ring shape, the central axis of ring with the axis coincidence of piston shaft, the excircle of ring closely laminates on the empty section of thick bamboo inner wall.
3. The spring negative pressure cell biopsy needle of claim 1 or 2, wherein:
still be provided with the ventilated membrane in the cell biopsy needle, the ventilated membrane is attached on the stationary blade is towards on the side of the nipple of blank section of thick bamboo.
4. The spring negative pressure cell biopsy needle of claim 1, wherein:
the cell biopsy needle is also provided with an elastic bulge, and the elastic bulge is fixed on the inner wall of the hollow cylinder opposite to the side surface of the spring;
when the elastic bulge extends, the top end of the elastic bulge contacts the spring and can clamp the spring, so that the spring is in a compressed state;
when the elastic bulge contracts, the top end of the elastic bulge is mutually separated from the spring, so that the spring is in an extension state.
5. The spring negative pressure cell biopsy needle of claim 4, wherein:
the elastic bulges are symmetrically arranged on two sides of the axis of the spring.
6. The spring negative pressure cell biopsy needle of claim 5, wherein:
the axis of the spring is superposed with the axis of the piston shaft, and at least 1 elastic bulge is positioned on the same side of the axis of the spring;
when the number of the elastic bulges positioned on the same side of the axis of the spring is more than or equal to 3, the elastic bulges are arranged at equal intervals along the parallel line of the axis of the spring.
7. The spring negative pressure cell biopsy needle of claim 4, wherein:
the cell biopsy needle is also provided with a pressure lever and a pressure lever handle;
the compression bar is tightly attached to the inner wall of the hollow cylinder, the compression bar is parallel to the axis of the piston shaft, one end of the compression bar is positioned between the piston and the hollow cylinder, and the compression bar, the hollow cylinder and the piston are sealed;
the pressure lever handle is connected with the other end of the pressure lever;
the hollow cylinder is provided with a groove, and the pressure rod handle can slide along the axial direction of the piston shaft;
when the pressure rod handle slides to the bottom of the hollow cylinder along the groove, the pressure rod can be pushed to slide to the bottom of the hollow cylinder.
8. The spring negative pressure cell biopsy needle of claim 7, wherein:
the pressing rod and the elastic bulge are positioned on the same straight line, and when the pressing rod contacts the elastic bulge, the elastic bulge can be extruded, so that the elastic bulge is in a contraction state.
9. The spring negative pressure cell biopsy needle of claim 7, wherein:
the included angle between the pressure rod handle and the pressure rod is 90-120 degrees.
10. The spring negative pressure cell biopsy needle of claim 7, wherein:
the compression rods are symmetrically arranged on two sides of the piston shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121857974.3U CN215778274U (en) | 2021-08-10 | 2021-08-10 | Spring negative pressure type cell biopsy needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121857974.3U CN215778274U (en) | 2021-08-10 | 2021-08-10 | Spring negative pressure type cell biopsy needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215778274U true CN215778274U (en) | 2022-02-11 |
Family
ID=80129761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121857974.3U Active CN215778274U (en) | 2021-08-10 | 2021-08-10 | Spring negative pressure type cell biopsy needle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215778274U (en) |
-
2021
- 2021-08-10 CN CN202121857974.3U patent/CN215778274U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20090299224A1 (en) | Lancet device and method for sampling and injecting blood using the lancet device | |
| CN109069133B (en) | Biopsy syringe | |
| WO2023071853A1 (en) | Suction valve assembly and endoscope | |
| CN210408480U (en) | Lung biopsy device for lung cancer patient | |
| CN215778274U (en) | Spring negative pressure type cell biopsy needle | |
| EP2228021A1 (en) | A device for elastic ligature of tissues | |
| CN110338879B (en) | High-flux laparoscope separating forceps | |
| CN210843184U (en) | Bone marrow biopsy needle | |
| CN208372186U (en) | A kind of vacuum extractor | |
| US9724030B2 (en) | Fluid handling device having a spring mechanism | |
| CN110251167A (en) | It is a kind of for adsorbing the spring external absorber of tissue | |
| CN206214103U (en) | A kind of New Blood sampler | |
| CN102090905B (en) | Pleural biopsy needle | |
| JP7113464B2 (en) | capillary blood sampling device | |
| CN214965988U (en) | Reverse suction type syringe | |
| CN208769792U (en) | Integral type hemostix | |
| CN209018794U (en) | A kind of division of endocrinology's secretion sampler | |
| RU51339U1 (en) | DEVICE FOR LIQUID FEEDING FROM CLOSED CAVITAS | |
| CN213665294U (en) | Puncture-preventing easily-closed blood-gas needle | |
| WO2002011613A2 (en) | Apparatus for aspirating sample fluids | |
| CN218146581U (en) | Take off granular cell device | |
| CN201832271U (en) | Locked evacuating injector | |
| CN219578985U (en) | Negative pressure suction puncture outfit | |
| CN208864886U (en) | A kind of syringe | |
| CN219440268U (en) | Disposable syringe capable of automatically sucking under negative pressure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |