TWM559182U - Safe indwelling needle - Google Patents

Abstract

A safety indwelling needle includes a body having a shaft hole axially extending therein, the body extending radially from a shunt tube communicating with the shaft hole, and a front end of the body is further provided with a needle seat a soft needle segment extending toward the rear, and an end plug is inserted behind the shaft hole; and a puncture device comprising a grip rod, the front end of the grip rod axially receiving a puncture needle, the grip rod being behind the puncture needle The end is provided with a connecting rod chamber, and the puncture needle penetrates the end plug and passes through the shaft hole, and a needle of the front end of the puncture needle protrudes from the front end of the needle segment; the grip rod is slidably sleeved a positioning mechanism is disposed in a sleeve, and an outer peripheral surface of the front portion of the grip and an inner peripheral surface of the rear portion of the sleeve are oppositely disposed; when the grip is pulled away from the needle and the body, the grip is The needle sleeve slides until the positioning mechanism forms a snap, so that the needle sleeve completely covers the puncture needle and the needle to provide safety in use.

Description

Safety indwelling needle

This case relates to an indwelling needle, in particular to a safe indwelling needle that can prevent medical personnel from being mistakenly punctured by a puncture needle.

The purpose and purpose of an administration set, such as a butterfly needle or an indwelling needle, is to deliver blood or medical fluids, such as during dialysis, intravenous or drip injection. The traditional butterfly needle has a special shape, which is a pair of wings protruding symmetrically in a radial direction of a body, a metal needle protrudes axially in the front, and an infusion tube is integrally connected to the rear. The end of the infusion tube is connected with a detachable End cap to prevent foreign objects from entering the infusion tube. During use, the medical staff pinches the pair of fins with two fingers to pierce the metal needle into the blood vessel of the patient for the purpose of transporting blood or medicine.

Due to the rigid material of the metal needle, it remains in the blood vessels of the human body, especially in the process of long-term renal dialysis, which often causes pain and discomfort to the patient, and it is easy to cause vascular embrittlement due to long-term use.

Based on the lack of the aforementioned butterfly needles, related companies and researchers have developed an indwelling needle made of a polymer material. The indwelling needle is composed of a tapered portion, a conveying tube, a relay tube, and an external tube. The conveying pipe is sleeved and adhered to the front section of the tapered section, so that the front and middle sections of the soft conveying pipe protrude from the front end of the tapered section, and the two ends of the relay pipe are respectively adhered to the rear section of the tapered section and Between the front ends of the external tubes.

When the indwelling needle is used, a puncture needle is used to penetrate the external tube, the relay tube, the delivery tube and the tapered portion, and the needle of the puncture needle is exposed outside the tapered portion, and then together with the front end of the delivery tube After piercing the blood vessel of the human body, the puncture needle is withdrawn, and the delivery tube is left in the blood vessel for the delivery of a medicinal solution or blood. In order to prevent blood from flowing out, the relay tube is implemented as a pinchable hose.

The aforementioned indwelling needle structure has been in existence for many years. The advantage is that the delivery tube is made of a polymer soft material and is retained in the blood vessel without causing pain and discomfort to the patient. However, the missing point is that the puncture needle penetrates into After the blood vessels of the human body are withdrawn, the needle of the puncture needle is in a naked state, and the potential danger of medical personnel or medical waste disposal personnel may be mistakenly misunderstood. This is a difficult problem for the relevant industry to overcome.

The main purpose of this case is to provide a safe indwelling needle. In the process of puncturing a needle into a blood vessel of a human body and withdrawing the needle, the needle of the puncture needle is covered by a needle cover, so as to avoid mistakenly binding medical personnel or medical waste disposal personnel, thereby Provides safety in use of this safety indwelling needle.

In order to achieve the foregoing object, the technical means adopted in this case is to provide a safety indwelling needle, which includes a body in which an axial hole is axially opened, and the body projects radially from a shunt tube communicating with the axial hole, and The front end of the body is further provided with a needle seat, a soft needle segment extending axially at the front end of the needle seat, and an end plug is sleeved behind the shaft hole to form a seal; and a puncture device including a grip bar, the grip A puncture needle is axially connected to the front end of the rod. The grip bar is provided with a rod chamber connected at the rear end of the puncture needle. The puncture needle penetrates the end plug and passes through the shaft hole. A needle protrudes from the front end of the needle segment; and the grip bar is slidably sleeved in a needle cover, and a positioning mechanism is oppositely provided on the outer peripheral surface of the front segment of the grip bar and the inner peripheral surface of the rear segment of the needle cap; When the grip bar is withdrawn from the needle segment and the body, the grip bar slides in the needle cover until the positioning mechanism forms a buckle, so that the needle cover completely covers the puncture needle and the needle.

As shown in FIGS. 1 to 3, basically, the safety indwelling needle in this case includes a body 1 and a puncture device 2.

The main body 1 is a polymer material, such as a polypropylene (Polypropylene, PP for short) pipe body. An axial hole 11 (shown in FIG. 3) is provided in the inner axial direction, and the main body 1 extends a shunt tube 12 radially. . As shown in FIG. 1 to FIG. 3, the shunt tube 12 extends obliquely from the outside of the body 1 and communicates with the shaft hole 11. When the shunt tube 12 is used, it is connected to an infusion control device 3. Furthermore, a needle seat 13 is provided at the front end of the body 1, and the needle seat 13 is made of a polymer material such as polypropylene to form an elongated tube body, which has a set of tubes 131 at the rear, and the front end of the sleeve 131 A soft needle segment 132 extends through which fluid, such as blood or medicine, can pass. The sleeve 131 is sleeved on the front end of the main body 1 and is fixed on the front end of the main body 1 in an adhesive or welding manner.

Among them, a plurality of guide holes 133 are radially opened in front of the needle segment 132, and the guide holes 133 include a pair of first guide holes 133a and a pair of second guide holes 133b arranged at 90 degrees to facilitate puncture. At this time, blood flows into the needle section 132 from the guide holes 133, and has the effect of being easy to puncture.

In addition, another end plug 14 is inserted from the rear end of the shaft hole 11 to form a seal; the end plug 14 abuts against the rear end positioned at the junction position of the shunt tube 12 and the shaft hole 11, such as a step-like one. The blocking edge 111 ensures that the flowing liquid can only enter and exit through the shunt tube 12, so that the end plug 14 forms an effect of blocking the flowing liquid. The end plug 14 is a solid cylinder made of a high-molecular soft material, such as silicon rubber.

The puncture device 2 includes a grip bar 21, a puncture needle 22, and a needle cover 23. The grip lever 21 and the needle cover 23 are made of a polymer material, such as polypropylene, and the puncture needle 22 is made of metal or ceramic. The puncture needle 22 is axially connected to the front end of the grip lever 21 so that the two are integrated into one body. As shown in FIG. 3, the grip rod 21 is provided with a rod chamber 211 communicating with the rear end of the puncture needle 22, and one end cover 212 is combined, for example, screwed or fastened to the rear end of the rod chamber 211. An exhaust structure is provided at the coupling position of the cover 212 and the rod chamber 211. For example, the thread clearance between the end cover 212 and the rod chamber 211 is increased when the screw connection method is used, or the end cover 212 is used when the screw connection method is used. An air vent is opened, so that after the puncture needle 22 penetrates the blood vessel, blood can pass through the puncture needle 22, and the air in the rod chamber 211 is discharged through the exhaust structure of the end cover 212, so that blood can flow into the Inside the rod chamber 211.

The grip bar 21 is slidably sleeved in a needle cover 23, and an outer peripheral surface of the front section of the grip bar 21 and an inner peripheral surface of the rear section of the needle cover 23 are oppositely provided with a positioning mechanism, such as a buckle that can be fastened to each other. The groove 213 and a buckle 231. Therefore, when the grip lever 21 slides in the needle cover 23 to make the buckle groove 213 and the buckle 231 form a buckle, the needle cover 23 can completely cover a needle 221 of the puncture needle 22, To avoid accidental ties.

As shown in FIGS. 2 and 3, it shows the combination of the puncture device 2 and the body 1. The assembler pierces the puncture needle 22 into the end plug 14 and passes through the shaft hole 11, so that the needle 221 at the front end of the puncture needle 22 protrudes from the front end of the needle segment 132. In order to prevent the bare needle 221 from being injured, another needle cover 4 is sleeved on the cannula 13 before leaving the factory, so that the needle segment 132 and the needle 221 are completely covered to avoid contamination and prevent misconnection. The situation happened.

As shown in FIG. 4, the shunt tube 12 is connected to the infusion control device 3. The infusion control device 3 includes a relay tube 31 which is slender and elastically made of an elastic polymer material, such as silicon rubber. One end of the relay pipe 2 is connected to the shunt pipe 12 by a connection head 311 made of a hard polymer material, and the other end is connected to an external pipe 32. The connection head 311 and the external tube 32 are made of a polymer material, such as Poly Vinyl Chloride, and the external tube 32 is connected to an infusion catheter (not shown in the prior art) so as to communicate with A hemodialysis device or an infusion device, such as an infusion or blood transfusion.

In yet another embodiment, the relay pipe 31, the connection head 311 and the external pipe 32 are formed into a long pipe body by injection molding.

The relay pipe 31 is sleeved on a liquid retaining ring 33. The liquid retaining ring 33 has an inverted U-shaped frame body 331. A pair of front and rear sides of the frame body 331 are oppositely provided for the relay tube 31 to pass through. A through hole 332 is provided, and a clip piece 333 is integrally extended on the top opening of the frame body 331 so as to be selectively connected to a buckle 334 opposite to the vertical inner wall of the frame body 331. The bottom surface of the clip piece 334 and The horizontal inner wall of the frame body 331 is oppositely provided with a pair of clamping tongues 335 which can control the relay pipe 31 to be turned on and off.

When the buckle piece 333 is not fastened to the frame body 331, the flowing fluid can pass through the relay pipe 31 and enter the shunt pipe 12 so as to transfer the flowing fluid into the blood vessel of the patient. Conversely, when the buckle piece 333 is fastened to the frame body 331, the pair of clips 335 collectively clamp the relay tube 31 (shown in FIG. 5) so that the flowing liquid does not enter the shunt tube 12 or blood No entry into the external pipe 32 is allowed.

Please refer to FIGS. 2 to 3 and FIGS. 6 to 9. In use, the medical staff holds the body 1 and inserts the needle 221 together with the needle segment 132 into the patient's blood vessel. The pair of first guide holes 133a and the pair of second guide holes 133b are disposed in an offset manner. Therefore, when the needle 221 punctures a blood vessel, blood flows into the needle segment 132 from the guide holes 133a and 133b to avoid the puncture. The impedance generated by the blood when the needle 22 is punctured; and the blood passes through the puncture needle 22 and flows into the rod chamber 211. Next, hold the body 1 and the needle cover 223 with one hand, and hold the grip rod 21 with the other hand and pull back, so that the grip rod 21 moves backward along the needle cover 23, and the puncture needle 22 follows The grip lever 21 moves until the positioning mechanism, such as the buckle groove 213 of the grip lever 21 and the buckle 231 of the needle cover 23 forms a buckle, the needle 221 also disengages from the end plug 14 to make the puncture needle 22 It is completely detached from the body 1 and is covered by the needle cover 23 (shown in FIGS. 6 and 7), so as to avoid the medical staff or the medical waste disposal staff from being accidentally stuck, thereby providing the safety of the safety indwelling needle.

As shown in FIG. 8 and FIG. 9, after the puncture device 2 is detached from the body 1, at this time, the buckle piece 333 of the liquid retaining ring 33 is fastened to the buckle 334, so that the pair of clips 335 The relay tube 31 is clamped to prevent blood from being ejected to the external tube 32 to form a hemostatic effect (shown in FIG. 5).

Then, the medical staff can connect one end of a conventional infusion catheter (not shown) to the external tube 32, and combine the other end of the infusion catheter with the hemodialysis instrument, so that the dialysis blood passes through the infusion catheter. Output, and directly flow through the external tube 32, the relay tube 31, the shunt tube 12, and the shaft hole 11 of the infusion control device 3, and finally enter the blood vessel through the needle segment 132. The stop ring 33 is used to control the flow of liquid, such as blood or medicine, at the position of the relay tube 31.

Therefore, through the implementation of this case, the added effect is that when the puncture device is withdrawn from the body, the puncture needle and its needle are completely covered by the needle cover, so that the needle is not exposed to avoid contamination and It can prevent accidental sticking and improve the safety in use. In addition, the infusion control device is provided with a stopper ring which can control the convection fluid, such as blood or medicinal fluid, in the relay tube, so that the safety indwelling needle can provide a hemostatic effect when punctured into a blood vessel. When an accident occurs in a medical institution, patients can use the stop ring to immediately cut off the flow of fluid to fight for the patient's escape time, which is a great structure that has never been seen in similar products.

The one disclosed in this case is one of the preferred embodiments, and any change or modification that originates from the technical ideas of this case and is easily inferred by those who are familiar with the technology, does not depart from the scope of patent rights in this case.

1‧‧‧ Ontology
11‧‧‧ Shaft hole
111‧‧‧Border
12‧‧‧ shunt tube
13‧‧‧ Needle Block
131‧‧‧ Casing
132‧‧‧ Needles
133‧‧‧Guide
133a‧‧‧First guide hole
133b‧‧‧Second guide hole
14‧‧‧ end plug
2‧‧‧ puncture device
21‧‧‧Grip
211‧‧‧pole room
212‧‧‧End cap
213‧‧‧Slot
22‧‧‧ puncture needle
221‧‧‧ Needle
23‧‧‧ Needle Sleeve
231‧‧‧buckle
3‧‧‧ infusion control device
31‧‧‧ relay tube
311‧‧‧ connector
32‧‧‧External tube
33‧‧‧Stop ring
331‧‧‧frame
332‧‧‧through hole
333‧‧‧Snap Clip
334‧‧‧Hook
335‧‧‧ Tongue
4‧‧‧ needle cap

In order to further disclose the specific technical content of the case, please first refer to the drawings, wherein: Figure 1 is an exploded perspective view of the safety indwelling needle in the case; Figure 2 is a perspective view of the safety indwelling needle in the case after assembly; Partial cross-sectional view; Figure 4 is a cross-sectional view after the infusion control device of the case is assembled; Figure 5 is a cross-sectional view when the infusion control device of the case is stopped; Figure 6 is a perspective view of the puncture device withdrawn from the body in the case; Sectional view of the puncture device shown; FIG. 8 is a perspective view of the safety indwelling needle used in this case; and FIG. 9 is a cross-sectional view of the safety indwelling needle shown in FIG. 8.

Claims (11)

A safety indwelling needle includes: (1) a body, an axial hole is opened in the body, the body protrudes radially from a shunt tube communicating with the shaft hole, and a front end of the body is further provided with a needle seat, and the front end of the needle seat A soft needle segment extending axially, and an end plug is sleeved behind the shaft hole to form a seal; and a puncture device including a grip bar, the front end of the grip bar is axially connected with a puncture needle, the grip bar A rod chamber is provided at the rear end of the puncture needle, the puncture needle penetrates the end plug and passes through the shaft hole, and a needle at the front end of the puncture needle protrudes from the front end of the needle segment; and the grip The rod is slidably sleeved in a needle sleeve, and a positioning mechanism is oppositely provided on the outer peripheral surface of the front section of the grip and the inner peripheral surface of the rear section of the needle sleeve; when the grip is pulled away from the needle section and the body At this time, the grip lever slides in the needle cover until the positioning mechanism forms a buckle, so that the needle cover completely covers the puncture needle and the needle. The safety indwelling needle according to item 1 of the scope of patent application, wherein the shunt tube extends obliquely backward from the outside of the body. The safety indwelling needle according to item 1 of the scope of patent application, wherein the needle seat has a set of tubes engaged in front of the body, and the front end of the cannula extends the needle section axially. The safety indwelling needle described in item 1 of the scope of patent application, wherein the end plug is abutted against and positioned at the rear end of the junction of the shunt tube and the shaft hole; and the end plug is a solid made of a polymer soft material Cylinder. The safety indwelling needle according to item 1 of the scope of patent application, wherein a rear end of the rod chamber is combined with an end cap, and an exhaust structure is provided at a joint position of the end cap and the rod chamber, so that blood can pass through the puncture needle, and Flow into the pole room. The safety indwelling needle according to item 1 of the scope of patent application, wherein the positioning mechanism is oppositely provided on the outer peripheral surface of the front section of the grip lever and the inner peripheral surface of the rear section of the needle cover with a buckle groove and a Buckle. The safety indwelling needle according to item 1 of the scope of patent application, wherein a plurality of guide holes are opened radially in front of the needle section. The safety indwelling needle as described in item 7 of the scope of patent application, wherein the guide holes include a pair of first guide holes and a pair of second guide holes that are disposed in an offset manner. The safety indwelling needle according to item 1 of the scope of patent application, further comprising an infusion control device, the infusion control device includes: (1) a relay tube, which is a tube body with elastic recovery, and one end of the relay tube uses a connector Connected to the shunt tube; 外接 an external tube, the two ends of which are respectively connected to the other end of the relay tube and an infusion catheter for infusion; and a stop ring, which includes an inverted U-shaped body, the front side of the body and A pair of through holes are provided on the rear side for the relay tube to pass through. The top opening of the body integrally extends a buckle piece, and the buckle piece is selectively fastened to a buckle provided opposite to the upright inner wall of the body. The bottom surface of the buckle piece is opposite to the horizontal inner wall of the body, and a pair of clips can be formed to control the relay pipe to be turned off. The safety indwelling needle according to item 9 of the scope of the patent application, wherein the relay tube is a tube body made of an elastic polymer material, and the connection head and the external tube are tube bodies made of a rigid polymer material. The safety indwelling needle described in item 10 of the scope of patent application, wherein the relay tube, the connection head and the external tube system are formed into a long tube body by injection molding.