A nerve block needle for sequential dosing
Patent Information
- Application Number
- CN202521041673.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-23
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-05-23
AI Technical Summary
Existing nerve block needles are difficult to use with one hand to sequentially administer two local anesthetics, resulting in prolonged onset of anesthesia and increased patient discomfort.
A nerve block needle with a three-way control device was designed, including a three-way extension tube, a needle tube, a needle hub, and a needle sleeve. The valve body is controlled by a knob to achieve selective communication of different local anesthetics, which facilitates sequential drug delivery by one hand.
It improves the convenience for anesthesiologists to perform nerve blocks with one hand, shortens the onset time of nerve blocks, and reduces patient suffering.
Smart Images
Figure CN224925212U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of medical device technology, specifically relating to a nerve block needle for sequential drug delivery. Background Technology
[0002] Peripheral nerve block anesthesia is a commonly used anesthetic method for limb fracture surgery. Clinically, ropivacaine is widely used for peripheral nerve blocks due to its low toxicity and long duration of action. However, ropivacaine has a high dissociation constant and a long onset time. Surgery requires efficiency and a fast pace; after the anesthesiologist completes the nerve block procedure, the surgeon often quickly positions and disinfects the patient. At this time, the nerve block may not have fully taken effect, causing pain in some patients during positioning and disinfection, increasing their suffering.
[0003] Studies have found that administering a small amount of a fast-acting local anesthetic, such as lidocaine, followed by sequential administration of ropivacaine, can shorten the onset time of nerve block without reducing the total duration of block.
[0004] Nerve block needles consist of an extension tube, needle tube, needle hub, and needle sheath. Currently, commonly used nerve block needles have only one administration port on the extension tube, making it inconvenient for sequential administration of two local anesthetics with a single hand. Therefore, in clinical practice, especially during ultrasound-guided nerve blocks, it is difficult for an anesthesiologist to quickly administer two local anesthetics sequentially using existing nerve block needles while holding the ultrasound probe in one hand. Therefore, a nerve block needle for sequential administration is needed to improve the convenience of sequential nerve block administration for anesthesiologists, shorten the onset time of nerve block, and reduce patient discomfort. Utility Model Content
[0005] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide a nerve block needle for sequential drug administration.
[0006] The technical solution adopted by this utility model to solve its technical problem is:
[0007] A nerve block needle for sequential drug administration includes a three-way extension tube, a needle tube, a needle hub, and a needle sheath.
[0008] The three-way extension tube includes a three-way control device and an extension tube body. One end of the extension tube body is connected to the needle tube, one end of the needle tube passes through the needle hub, and the needle sleeve is fitted onto the needle hub.
[0009] The three-way control device includes a three-way body, a protective cap, a valve body, and a knob. The three-way body has a hollow cavity, and its side is provided with ports, namely a first female Luer port, a second female Luer port, and a third port, which are respectively connected to the hollow cavity. The protective cap is provided on the first female Luer port and the second female Luer port. The third port is connected to the other end of the extension tube. The valve body is located in the hollow cavity and has a T-shaped channel. The three openings of the T-shaped channel can respectively correspond to the ports of the three-way body. The knob is connected to the valve body.
[0010] Preferably, the third port is integrally connected to the other end of the extension tube body.
[0011] Preferably, one end of the extension tube is connected to the needle tube in a sealed manner.
[0012] Preferably, one end of the extension tube body is connected to the needle tube by heat sealing welding to achieve a sealed connection.
[0013] Preferably, the needle tube has a hollow structure, the needle tube is made of stainless steel, and the other end of the needle tube has a pointed shape.
[0014] Preferably, the needle holder has symmetrically provided concave arc-shaped grooves on both sides.
[0015] Preferably, the ends of the first female Luer port and the second female Luer port are provided with external threads, and the protective cap is provided with internal threads. The first female Luer port, the second female Luer port and the protective cap are connected by the meshing of the external threads and the internal threads.
[0016] Preferably, the valve body can rotate 360° within the hollow cavity via the knob.
[0017] Preferably, the knob is T-shaped and has three knob ends, the three knob ends of which are aligned with the channel opening of the T-shaped channel in the valve body.
[0018] Compared with the prior art, the beneficial effects of this utility model include:
[0019] The nerve block needle for sequential drug administration disclosed in this application has a three-way control device. The operator can rotate the valve body by operating the knob with one hand, thereby selectively connecting the T-shaped channel in the valve body to one of the first female Luer port, the second female Luer port, and the third port. This facilitates the sequential administration of different local anesthetics from the first female Luer port and the second female Luer port, improves the convenience of sequential drug administration for anesthesiologists, shortens the onset time of nerve block, and reduces patient suffering. Attached Figure Description
[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the structure of this utility model.
[0022] Figure 2 This is a schematic diagram of the three-way control device of this utility model.
[0023] Figure 3 This is a schematic diagram of the connection structure between the valve body and the knob of this utility model.
[0024] Figure 4 This is a schematic diagram of the T-shaped channel inside the valve body of this utility model.
[0025] Figure 5 This is a schematic diagram showing the connection between the first female Luer port and the third port of this utility model.
[0026] Figure 6 This is a schematic diagram showing the connection between the second female Luer port and the third port of this utility model.
[0027] in:
[0028] 1-Extension tube with tee, 110-Tee body, 111-First female Luer port, 112-Second female Luer port, 113-Third port, 120-Protective cap, 130-Valve body, 131-T-type channel, 132-Channel opening, 140-Knob, 2-Needle tube, 3-Needle seat, 4-Needle sleeve. Detailed Implementation
[0029] To better understand the above-mentioned objectives, features, and advantages of this utility model, it will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. Many specific details are set forth in the following description to provide a thorough understanding of this utility model; the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.
[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
[0031] Example:
[0032] like Figure 1-6 As shown, this embodiment provides a nerve block needle for sequential drug administration, including a three-way extension tube 1, a needle tube 2, a needle hub 3, and a needle sleeve 4;
[0033] The extension tube 1 with a three-way valve includes a three-way control device and an extension tube body. One end of the extension tube body is connected to the needle tube 2. One end of the needle tube 2 passes through the needle seat 3. The needle sleeve 4 is fitted onto the needle seat 3.
[0034] See Figure 1 and Figure 2 The three-way control device includes a three-way body 110, a protective cap 120, a valve body 130, and a knob 140. The three-way body 110 has a hollow cavity. Ports are provided on the side of the three-way body 110, namely a first female Luer port 111, a second female Luer port 112, and a third port 113, which communicate with the hollow cavity. The protective cap 120 is located at the first female Luer port 111 and the second female Luer port 112. The third port 113 is connected to the other end of the extension tube. The valve body 130 is located within the hollow cavity. (See also...) Figure 4 The valve body 130 is provided with a T-shaped channel 131. The three port 132 of the T-shaped channel 131 can correspond to the port of the three-way body 110 respectively. The knob 140 is connected to the valve body 130.
[0035] The nerve block needle for sequential drug administration in this embodiment has a three-way control device. The operator can rotate the valve body 130 by operating the knob 140 with one hand, thereby enabling the T-shaped channel 131 in the valve body 130 to selectively connect one of the first female Luer port 111, the second female Luer port 112, and the third port 113. This facilitates the sequential administration of different local anesthetics from the first female Luer port 111 and the second female Luer port 112, improves the convenience of sequential drug administration for anesthesiologists, shortens the onset time of nerve block, and reduces patient suffering.
[0036] Specifically, the third port 113 is integrally connected to the other end of the extension pipe.
[0037] Specifically, one end of the extension tube is connected to the needle tube 2 in a closed loop.
[0038] The aforementioned sealed connection is achieved by heat-sealing one end of the extended tube body to the needle tube 2.
[0039] In this embodiment, the needle tube 2 has a hollow structure and is made of stainless steel. The other end of the needle tube 2 has a pointed structure with a beveled surface, which facilitates puncture of the needle tube 2. When the needle tube 2 punctures the target position, the local anesthetic injected from the first female Luer port 111 and the second female Luer port 112 can pass through the three-way extension tube 1 and the needle tube 2 to reach the target position.
[0040] In this embodiment, the needle holder 3 has symmetrically provided concave arc-shaped grooves on both sides. With the above structure, it is convenient for the operator to place the fingertips in the grooves, making it convenient for the operator to hold the nerve block needle for operation.
[0041] The needle cap 4 serves to protect the needle tube 2; simply remove the needle cap 4 before use.
[0042] In this embodiment, the ends of the first female Luer port 111 and the second female Luer port 112 are provided with external threads, and the protective cap 120 is provided with internal threads. The first female Luer port 111, the second female Luer port 112 and the protective cap 120 are connected through the meshing of the external and internal threads. The above structure can ensure that the protective cap 120 can be quickly and stably connected to the ends of the first female Luer port 111 and the second female Luer port 112. When not in use, the protective cap 120 can prevent the first female Luer port 111 and the second female Luer port 112 from being contaminated.
[0043] See Figure 2 and Figure 3 In this embodiment, the valve body 130 can rotate 360° within the hollow cavity via the knob 140.
[0044] Specifically, the knob 140 is T-shaped and has three knob ends. The three knob ends of the knob 140 are aligned with the channel opening 132 of the T-shaped channel 131 inside the valve body 130.
[0045] In the above structure, the operator rotates the valve body 130 within the hollow cavity by operating the knob 140 with one hand. This allows the channel opening 132 of the T-shaped channel 131 within the valve body 130 to selectively connect to either the first female Luer port 111, the second female Luer port 112, or the third port 113. Specifically, when the knob 140 is rotated to... Figure 5 When in position, the first female Luer port 111 is connected to the third port 113 through the T-shaped channel 131 inside the valve body 130. When the knob 140 is rotated to... Figure 6 When in position, the second female Luer port 112 is connected to the third port 113 through the T-shaped channel 131 inside the valve body 130.
[0046] The specific method of using the nerve block needle for sequential drug delivery in this embodiment is as follows:
[0047] Loosen the protective cap 120, and connect two syringes containing different local anesthetics to the first female Luer port 111 and the second female Luer port 112, respectively. For example, the first syringe contains lidocaine and is connected to the first female Luer port 111, and the second syringe contains ropivacaine and is connected to the second female Luer port 112. Hold the ultrasound probe with one hand and the nerve block needle with the other hand, insert it to the target location, and then rotate the knob 140 to... Figure 5 At this position, the first female Luer port 111 is connected to the third port 113 through the T-shaped channel 131 inside the valve body 130. Pushing lidocaine into the first syringe will inject it to the target location. Continue rotating the knob 140 with one hand... Figure 6 At this point, the second female Luer port 112 is connected to the third port 113 through the T-shaped channel 131 inside the valve body 130. By pushing the second syringe, ropivacaine can be injected to the target location, thus quickly completing the sequential administration of two different local anesthetics during single-person ultrasound-guided nerve block procedures.
[0048] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.
Claims
1. A nerve block needle for sequential drug administration, characterized in that, Includes a three-way extension tube, needle tube, needle hub, and needle sheath; The three-way extension tube includes a three-way control device and an extension tube body. One end of the extension tube body is connected to the needle tube, one end of the needle tube passes through the needle hub, and the needle sleeve is fitted onto the needle hub. The three-way control device includes a three-way body, a protective cap, a valve body, and a knob. The three-way body has a hollow cavity, and its side is provided with ports, namely a first female Luer port, a second female Luer port, and a third port, which are respectively connected to the hollow cavity. The protective cap is provided on the first female Luer port and the second female Luer port. The third port is connected to the other end of the extension tube. The valve body is located in the hollow cavity and has a T-shaped channel. The three openings of the T-shaped channel can respectively correspond to the ports of the three-way body. The knob is connected to the valve body.
2. The nerve block needle for sequential drug administration according to claim 1, characterized in that, The third port is integrally connected to the other end of the extension pipe.
3. The nerve block needle for sequential drug administration according to claim 1, characterized in that, One end of the extension tube is connected to the needle tube in a sealed manner.
4. The nerve block needle for sequential drug administration according to claim 3, characterized in that, One end of the extension tube is connected to the needle tube in a sealed manner through heat sealing welding.
5. The nerve block needle for sequential drug administration according to claim 1, characterized in that, The needle tube has a hollow structure and is made of stainless steel. The other end of the needle tube has a pointed shape.
6. The nerve block needle for sequential drug administration according to claim 1, characterized in that, The needle holder has symmetrically arranged concave arc-shaped grooves on both sides.
7. The nerve block needle for sequential drug administration according to claim 1, characterized in that, The first female Luer port and the second female Luer port are provided with external threads at their ends, and the protective cap is provided with internal threads. The first female Luer port, the second female Luer port and the protective cap are connected by the engagement of the external threads and the internal threads.
8. The nerve block needle for sequential drug administration according to claim 1, characterized in that, The valve body can rotate 360° within the hollow cavity via the knob.
9. The nerve block needle for sequential drug administration according to claim 1, characterized in that, The knob is T-shaped and has three knob ends, the three knob ends of which are aligned with the channel opening of the T-shaped channel in the valve body.