Vein blood taking needle with flexible push switch structure
By incorporating a flexible pressure switch structure between the tail needle and the catheter of the venous blood collection needle, and using a balloon and flexible diaphragm to control blood flow, the problem of bleeding during multi-tube blood collection is solved, achieving a safe and flexible blood collection process.
Patent Information
- Application Number
- CN202422499204.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-10-15
AI Technical Summary
During the collection of multiple blood tubes, the rubber stopper cannot effectively cover the needle when the venous blood collection needle is inserted and withdrawn repeatedly, which increases the risk of bleeding and infection.
A flexible pressure switch structure, including a balloon and a flexible membrane, is set between the tail needle and the catheter. In its natural state, the membrane blocks the channel. Pressing the balloon deforms the membrane to control blood flow. The opening and closing of the switch structure can be controlled manually.
It effectively avoids bleeding, has a simple structure, is flexible in use, can stably control blood flow rate, and reduces the risk of infection.
Smart Images
Figure CN223516358U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a vein blood taking needle, in particular to a vein blood taking needle with flexible pressing switch structure. BACKGROUND
[0002] The vein blood taking needle is a blood taking needle used for collecting blood samples in medical examination process. Its traditional structure comprises a puncture needle, a catheter and a tail needle connected in sequence, and the tail needle is wrapped with a rubber plug. The blood taking process is as follows: first, the puncture needle at the front end of the vein blood taking needle punctures the blood vessel, and then the tail needle at the tail end is inserted into the vacuum blood taking test tube. In this process, the tail needle can pierce the rubber plug, so that the inside of the test tube is communicated with the blood taking needle. Then, the blood can be sucked into the tube by the negative pressure in the test tube. After the blood taking test tube completes the collection, the tail needle is pulled out, and the rubber plug re-wraps the tail needle by virtue of its rebound property.
[0003] When checking in a hospital, multiple tubes of blood are often continuously drawn for the following situations:
[0004] 1. Diagnosis of some diseases. For example, diabetes and thyroid diseases often require five to eight tubes of blood for blood sugar, insulin, thyroid function tests, etc.
[0005] 2. Preoperative examination. Patients who need surgery are usually required to draw multiple tubes of blood for preoperative examination, including blood routine, coagulation function, liver and kidney function, etc., to evaluate the patient's physical condition and surgical risk.
[0006] 3. Genetic testing. In order to detect different gene sites to determine the possibility of gene mutation or genetic disease, multiple tubes of blood need to be drawn.
[0007] 4. Obstetric screening. During obstetric examination, in order to better understand the female's physical condition and rule out other diseases, liver function, thyroid function, blood sugar, blood lipid, infection of eight items, blood routine, etc. are usually tested.
[0008] 5. Hemodialysis. For patients who need hemodialysis, multiple tubes of blood need to be drawn before each dialysis to monitor the dialysis effect, and then the treatment plan in the later period is adjusted according to the physical condition.
[0009] When multiple tubes of venous blood need to be collected, the tail end of the vein blood taking needle is repeatedly inserted and pulled out of the blood taking test tube, and too many times can easily cause the rubber plug to fail to effectively wrap the pulled-out tail needle, resulting in bleeding and the risk of infection. UTILITY MODEL CONTENT
[0010] Therefore, the utility model provides a vein blood taking needle with flexible pressing switch structure, which aims to control the circulation of blood in the vein blood taking needle and avoid bleeding.
[0011] In order to achieve the above object, the technical scheme of the utility model is as follows:
[0012] A vein blood taking needle with a flexible pressing switch structure, comprising a puncture needle, a tail needle and a catheter connecting the puncture needle and the tail needle, a rubber plug is sleeved on the tail needle, characterized in that: a flexible pressing switch structure is arranged between the tail needle and the catheter, the flexible pressing switch structure comprises a needle seat and a balloon fixed on one side of the needle seat, a channel is formed in the middle of the balloon, the tail needle is fixed on the needle seat and communicates with one end of the channel, the other end of the channel communicates with the catheter, and at least two flexible diaphragms are circumferentially distributed on the inner wall of the channel; in a natural state, the flexible diaphragms are close to each other to block the channel; the flexible diaphragms are separated from each other by pressing the balloon, so that the channel is opened.
[0013] With the above structure, the flexible diaphragm blocks the channel in a normal state, the diaphragm is deformed by pressing the middle position of the balloon, and blood can flow normally, the flexible pressing switch structure is used to artificially control the circulation of blood in the vein blood taking needle, the use is flexible, and the situation of blood leakage in the collection of multiple tubes of blood is avoided.
[0014] As a preferred: the channel comprises a catheter connecting section and a tail needle connecting section, and a hollow chamber between the catheter connecting section and the tail needle connecting section, the tail needle connecting section is funnel-shaped, and the width thereof decreases from the end close to the hollow chamber to the end close to the tail needle. With the above structure, the blood flow rate is facilitated to be controlled, and excessive fast or slow is avoided.
[0015] As a preferred: the flexible diaphragms are obliquely arranged on the inner wall of the channel, the flexible diaphragms are close to each other to form a conical structure, the upper end of the flexible diaphragm extends to the center position of the channel, and the lower end is integrally formed with the inner wall of the channel. With the above structure, the conical structure is easy to deform when the balloon outside is pressed, and the influence of the flexible pressing switch structure on the blood flow rate is avoided to be too large.
[0016] As a preferred: the number of the flexible diaphragms is three. With the above structure, the conical structure formed by the three flexible diaphragms is more stable, and the sealing is better in a normal state.
[0017] As a preferred: the balloon is thick in the middle and thin at both ends, and the conical structure is located at the middle position of the balloon. With the above structure, the conical structure is deformed to a large extent.
[0018] As a preferred: a first groove is formed in the circumferential direction of the catheter connecting section, a first boss is arranged on the catheter and matched with the first groove, and the first groove and the first boss are matched to connect the catheter and the balloon. With the above structure, the structure is simple, and the installation is convenient.
[0019] As preferred: the tail needle rear end is fixed in the needle seat, the balloon is provided with a second groove in the circumferential direction near the end of the tail needle, the needle seat rear end is provided with a second boss matched with the second groove, and the second groove and the second boss are matched to connect the tail needle and the balloon. With the above structure, the structure is simple and convenient to install.
[0020] As preferred: the balloon and the flexible diaphragm inside are made of rubber. With the above structure, the sealing performance in the channel is good.
[0021] Compared with the prior art, the utility model has the advantages that:
[0022] 1. The flexible pressing switch structure is arranged between the tail needle and the catheter, the flexible diaphragm is close to form a conical structure to seal the channel in the conventional state, the flexible diaphragm is deformed by manually pressing the balloon to make the channel flow, the structure is simple and flexible to use. Based on this, in the process of collecting multiple tubes of blood, the nurse can control the opening and closing of the blood taking needle by manually pressing and releasing the balloon, thereby solving the problem that the tail needle will bleed after being pulled out of the vacuum tube.
[0023] 2. The conical structure is composed of three flexible diaphragms with the same size, the structure is stable, the conical structure is opposite to the blood flow direction, and the sealing performance is good.
[0024] 3. The balloon is thick in the middle and thin at both ends, the conical structure is located at the middle position of the balloon, the flexible diaphragm can be deformed by lightly pinching the balloon, the flexible pressing switch structure has little influence on the blood flow speed, and the use is convenient. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 It is a structural schematic view of the utility model;
[0026] Figure 2 It is a sectional view of the utility model;
[0027] Figure 3 It is Figure 2 It is an enlarged view of the middle B;
[0028] Figure 4 It is a schematic view showing the state of the three flexible diaphragms 52;
[0029] Figure 5 It is a partial exploded view of the utility model;
[0030] Figure 6 It is a sectional view of the balloon 5 and the needle seat 6;
[0031] Figure 7 It is a schematic view showing the state of the flexible diaphragm 52 when the balloon 5 is pressed. DETAILED DESCRIPTION
[0032] The utility model will be further described below in combination with the embodiments and drawings.
[0033] As Figure 1 shown, a kind of flexible press switch structure's phlebotomy needle, including puncture needle 1, catheter 3 and tail needle 2 connected in sequence, tail needle 2 is wrapped with rubber plug 4, flexible press switch structure A is equipped between tail needle 2 and catheter 3, press switch structure A can control the flow of blood in blood taking needle, specific structure includes needle seat 6 and the balloon 5 of fixed connection on the upper side of needle seat 6, tail needle 2 is fixed on needle seat 6.
[0034] As Figure 2 And Figure 3 Shown, channel 51 is formed in the middle of balloon 5, one end of channel 51 is communicated with tail needle 2, the other end is communicated with catheter 3, blood is led out by puncture needle 1, passes through catheter 3, passes through the channel 51 in the middle of balloon 5, and is finally introduced into blood collection test tube by tail needle 2. Three flexible diaphragms 52 are distributed on the inner wall of channel 51 by Figure 4 It can be seen that the three flexible diaphragms 52 are the same size and close to each other. In the natural state, i.e. when the tail needle 2 of the venous blood collection needle is not inserted into the blood collection test tube between collecting multiple tubes of blood, the three flexible diaphragms 52 close to each other can block the channel 51, so that the blood cannot flow out normally.
[0035] As Figure 6 Shown, three flexible diaphragms 52 are inclinedly arranged on the inner wall of channel 51, and each flexible diaphragm 52 closes to each other to form a conical structure as a whole. Balloon 5 and flexible diaphragm 52 are made of rubber, balloon 5 is thick in the middle and thin at both ends, and the conical structure is located at the middle position of balloon 5, as Figure 7 shown, pressing the outer wall of balloon 5, the gas sealed in balloon 5 is extruded, which will cause the deformation of channel 51 in the inner wall. Since the two ends of channel 51 are fixedly connected with catheter 3 and needle seat 6 respectively, the degree of deformation is small at the middle position. The lower end of the three flexible diaphragms 52 is integrally formed with the inner wall of channel 51, and the upper end extends to the center position of channel 51. As Figure 7 shown, when the outer wall of balloon 5 is extruded, the three flexible diaphragms 52 change from the state of closing to each other to the state of separating from each other, at this time, there are gaps between the three flexible diaphragms 52, and the greater the extrusion, the greater the gap, and the blood can flow normally in channel 51. When the extrusion of the outer wall of balloon 5 disappears, the three flexible diaphragms 52 automatically close to each other and restore by relying on their own elasticity, and channel 51 is closed.
[0036] As Figure 6As shown in the drawings, the channel 51 comprises a catheter connecting section 511 and a tail needle connecting section 513, and a hollow chamber 512 between the catheter connecting section 511 and the tail needle connecting section 513, wherein the tapered structure is arranged in the hollow chamber 512, the bottom end of the tapered structure is located at the transition between the hollow chamber 512 and the tail needle connecting section 513, the top end of the tapered structure extends into the hollow chamber 512, and the deformation degree of the tapered structure is the largest at the top end, and the tapered structure is opposite to the blood flow direction, and has better sealing performance. The tail needle connecting section 513 is funnel-shaped, and the width thereof decreases from the end close to the hollow chamber 512 to the end close to the tail needle 2, so that the blood outflow speed can be controlled, and the blood outflow speed is prevented from being too fast or too slow.
[0037] As shown in the drawings, Figure 3 and Figure 5 The catheter connecting section 511 is provided with a first annular groove 511a in the circumferential direction, the catheter 3 is provided with a first boss 31 matched with the first annular groove 511a, the first annular groove 511a and the first boss 31 are matched, and the catheter 3 and the balloon 5 are fixedly connected. The end of the balloon 5 close to the tail needle 2 is provided with a second annular groove 53 in the circumferential direction, and the rear end of the needle seat 6 is provided with a second boss 61 matched with the second annular groove 53, the second annular groove 53 and the second boss 61 are matched, and the tail needle 2 and the balloon 5 are connected, and the structure is simple and stable.
[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present application, and those skilled in the art can make various similar expressions under the inspiration of the present application without departing from the purpose and claims of the present application. Such changes fall within the scope of the present application.
Claims
1. A venous blood taking needle provided with a flexible push switch structure, comprising a puncture needle (1), a tail needle (2), and a catheter (3) connecting between the puncture needle (1) and the tail needle (2), a rubber plug (4) is sleeved on the tail needle (2), characterized in that: The tail needle (2) and the catheter (3) are provided with a flexible pressing switch structure (A), the flexible pressing switch structure (A) comprises a needle seat (6) and a balloon (5) fixed on one side of the needle seat (6), a channel (51) is formed in the middle of the balloon (5), the tail needle (2) is fixed on the needle seat (6) and communicated with one end of the channel (51), the other end of the channel (51) is communicated with the catheter (3), and at least two flexible diaphragms (52) are circumferentially distributed on the inner wall of the channel (51); in the natural state, the flexible diaphragms (52) are close to each other to block the channel (51); when the balloon (5) is pressed, the flexible diaphragms (52) are separated from each other, so that the channel (51) is opened.
2. The phlebotomy needle with a flexible push switch structure of claim 1, wherein: The channel (51) comprises a catheter connecting section (511) and a tail needle connecting section (513), and a hollow chamber (512) between the catheter connecting section (511) and the tail needle connecting section (513), the tail needle connecting section (513) is funnel-shaped, and the width thereof decreases from the end close to the hollow chamber (512) to the end close to the tail needle (2).
3. The phlebotomy needle with a flexible push switch structure of claim 2, wherein: Each flexible diaphragm (52) is obliquely arranged on the inner wall of the channel (51), each flexible diaphragm (52) is close to each other to form a conical structure, the upper end of the flexible diaphragm (52) extends to the center position of the channel (51), and the lower end is integrally formed with the inner wall of the channel (51).
4. The phlebotomy needle having a flexible push switch structure of claim 1, wherein: The number of the flexible diaphragms (52) is three.
5. The phlebotomy needle having a flexible push switch structure of claim 3, wherein: The balloon (5) is thick in the middle and thin at both ends, and the conical structure is located at the middle position of the balloon (5).
6. The phlebotomy needle having a flexible push switch structure of claim 2, wherein: The catheter connecting section (511) is provided with a first groove (511a) in the circumferential direction, the catheter (3) is provided with a first boss (31) adapted to the first groove (511a), the first groove (511a) is matched with the first boss (31), and the catheter (3) and the balloon (5) are connected.
7. The phlebotomy needle having a flexible push switch structure of claim 1, wherein: The tail needle (2) is fixed in the needle seat (6), the end of the balloon (5) close to the tail needle (2) is provided with a second groove (53) in the circumferential direction, the rear end of the needle seat (6) is provided with a second boss (61) adapted to the second groove (53), the second groove (53) is matched with the second boss (61), and the tail needle (2) and the balloon (5) are connected.
8. The flexible push switch structure provided in the vein blood taking needle according to claim 1, characterized in that: The balloon (5) and the flexible diaphragms (52) inside the balloon (5) are made of rubber.