TWM474529U - Improved indwelling needle - Google Patents

Description

Improvement of indwelling needle (2)

This case relates to an indwelling needle, especially an indwelling needle with infusion and disconnection control.

According to the administration set, for example, a butterfly needle or an indwelling needle is used for delivering blood or liquid medicine during dialysis, intravenous injection or drip injection. The conventional butterfly needle has a special shape, which is formed by projecting a pair of fins radially symmetrically on a body, a metal needle extending from the front axial direction, and an infusion tube integrally connected to the rear, and the end of the infusion tube is detachably attached. End caps to prevent foreign matter from entering the infusion tube. When in use, the medical staff pinches the pair of flaps with two fingers to puncture the metal needle into the blood vessel of the patient to deliver blood or liquid medicine.

Because the metal needle material is rigid, it is left in the blood vessels of the human body, especially in the process of dialysis for a long time, which often causes pain and discomfort to the patient, and is more likely to cause damage to the blood vessel embrittlement due to long-term use.

Based on the absence of the aforementioned butterfly needle, the related art and developed an indwelling needle made of a polymer material, as shown in FIG. 1 and FIG. 2, the conventional indwelling needle is composed of a tapered portion 10, a delivery tube 20, and a The relay pipe 30 and an external pipe 40 are composed. The conveying pipe 20 is sleeved and adhered to the front portion of the tapered portion 10, so that the front and middle portions of the flexible conveying pipe 20 are protruded from the front end of the tapered portion 10, and the two ends of the relay pipe 30 are respectively adhered thereto. The rear portion of the tapered portion 10 is between the front end of the outer tube 40 and the front end of the outer tube 40.

When the indwelling needle is used, the puncture needle (not shown) is inserted into the outer tube 40, the relay tube 30, the tapered portion 10, and the delivery tube 20, and the needle of the puncture needle is exposed to the needle. Outside the delivery tube 20. During operation, the medical staff inserts the needle of the puncture needle together with the front end of the delivery tube 20 into the blood vessel of the patient, and then withdraws the puncture needle, so that the front portion of the delivery tube 20 is left in the blood vessel for liquid medicine or blood. delivery.

In order to prevent the outflow of blood after the puncture needle is withdrawn, the relay tube 30 is implemented by using a pinchable hose, such as a slender tube made of silicone, which has the effect of applying force deformation, when the medical staff takes a finger The relay tube 30 is pinched or released, that is, a disconnection control is formed to prevent blood from being ejected from the external tube 40.

The above-mentioned indwelling needle structure has been used for many years, and has the advantage that the conveying tube is made of a polymer soft material, which is left in the blood vessel, and does not cause pain and discomfort to the patient; but the missing point is that the relay tube is It is made of a hose, but it is often difficult to pinch due to aging of the material, or it is impossible to pinch the relay tube due to improper pinching of the medical staff, so that the relay tube cannot be removed when the needle is pulled away The pinching is performed so that blood passes through the relay tube and is ejected by the external tube. In addition, the two ends of the relay tube are adhered to the tapered portion and the external connecting tube by an adhesive, which increases the complexity of the assembly process, and requires labor and manpower, and the problem of improvement is urgently needed.

The main purpose of the present invention is to provide an improvement of the indwelling needle, which replaces the aforementioned relay tube with a control valve, which has the function of controlling the infusion, such as blood or liquid medicine, to provide comfort during infusion of the patient. With the use of security.

In order to achieve the foregoing objectives, the technical means employed in the present invention provides an improvement of an indwelling needle comprising: a control valve having a radially open circular valve chamber a valve body, the peripheral surface of the valve chamber extends relative to the same axis and communicates with a first connecting tube and a second connecting tube, and the valve chamber is sleeved with a cylindrical sealing plug, and the sealing plug is axially open and alignable The first and second nozzles are perforated, and the top surface of the sealing plug extends axially at least one valve stem; and a conveying conduit has a joint portion at the rear of the first nozzle, and the front portion is axially Extending a soft needle segment through which the infusion can pass; by sliding the valve handle, the sealing plug is rotated in the valve chamber, and the perforation forms a communication state with the first and second connecting tubes on the same axis. Alternatively, the perforation and the first and second nozzles are in a cut off state from the shielding.

1‧‧‧Control valve

11‧‧‧ valve body

12‧‧‧ valve room

121‧‧‧ buckle groove

13‧‧‧First takeover

131‧‧ ‧ retaining ring

14‧‧‧Second takeover

141‧‧‧First connector

15‧‧‧ Sealing plug

151‧‧‧Perforation

152‧‧‧ buckle

153‧‧‧ valve handle

154‧‧‧ mark

16‧‧‧ casing

161‧‧‧Neck hole

162‧‧‧ Third connector

2‧‧‧ delivery catheter

21‧‧‧ joints

22‧‧‧Soft needle section

23‧‧‧ Guide hole

24‧‧‧Second connection

3‧‧‧Puncture device

31‧‧‧Puncture needle

311‧‧‧ needle

312‧‧‧ needle

313‧‧‧ needle seat

32‧‧‧ Stop the thrombus

321‧‧‧ 环

322‧‧‧fourth connector

323‧‧‧ hole

324‧‧‧ 塞塞塞

10‧‧‧Cone

20‧‧‧ delivery tube

30‧‧‧Relay tube

40‧‧‧External

In order to further reveal the specific technical content of the present case, first, please refer to the drawings, wherein: FIG. 1 is an exploded perspective view of a conventional indwelling needle; FIG. 2 is a perspective view of a conventional indwelling needle set; FIG. 3 is an indwelling needle and a puncture needle in the present case. FIG. 4 is a perspective view of the indwelling needle assembly of the present invention combined with the puncture needle; FIG. 5 is a cross-sectional view taken along line AA of FIG. 4; and FIG. 6 is a second embodiment of the control valve for the indwelling needle of the present invention. Stereo picture.

As shown in FIG. 3 to FIG. 5, basically, the indwelling needle of the present invention is composed of a control valve 1 and a delivery catheter 2.

The control valve 1 includes a valve body 11 . The valve body 11 defines a circular valve chamber 12 . The circumferential surface of the valve chamber 12 extends relative to the same axis and communicates with a first connection tube 13 and a second connection tube 14 . In order to allow an infusion, such as blood or medical fluid, to pass axially through the first and second nozzles 13, 14 and the valve chamber 12. The first nozzle 13 is adapted to receive and receive a delivery catheter 2 The second connector 14 is adapted to receive a thrombus 32 or a conventional infusion tube of a conventional puncture device 3, so that the indwelling needle becomes an infusion set. Wherein, the second connecting tube 14 is provided with a first connecting member 141, such as a male threaded portion, for forming a connection with the anti-thrombus 32 or the infusion tube.

In order to provide the disconnection control of the infusion, the valve chamber 12 is sleeved inwardly from the top opening into a cylindrical sealing plug 15, and the sealing plug 15 is axially open and alignable with the first and second connecting tubes 13, A perforation 151 of 14 allows the infusion to pass through the perforation 151. In addition, in order to prevent the sealing plug 151 from radially coming out of the valve chamber 12, the two adjacent surfaces are oppositely provided with a buckle 152 and a buckle groove 121 forming a snap type.

In addition, the top surface of the sealing plug 15 extends axially at least one valve handle 153 to facilitate the rotation of the sealing plug 15 in the valve chamber 12 when the medical staff toggles the valve handle 153. In particular, the top of the sealing plug 15 facing the axis of the first and second connecting tubes 13 and 14 is oppositely disposed with a pair of pointing marks 154, and when the pair of marks 154 are aligned with the first and second connecting tubes At 13 and 14, the perforation 151 and the first and second nozzles 13 and 14 form an infusion state in which the first and second nozzles 13 and 14 are in communication with each other.

The conveying conduit 2 is an elongated tubular body made of a polymer soft material, such as polyethylene (PE), and has a fitting at the rear thereof, for example, a joint portion 21 that is sleeved and adhered to the first joint pipe 13, which The front end of the joint portion 21 axially extends a soft needle segment 22 through which the infusion can pass. Wherein, a plurality of guide holes 23 are radially opened in the front portion of the needle segment 22, so that the blood in the blood vessel can flow into the needle segment 22 from the guide holes 23 when the puncture is performed, and the puncture effect is easy.

a second connecting member 24, such as a male threaded section 24, is radially protruded from the rear portion of the engaging portion 21 in order to quickly join the first connecting tube 13; A tapered retaining ring 131 is protruded from the circumferential surface of the first connecting tube 13 so as to rotatably sleeve a sleeve 16 to the first connecting tube 13. The rear portion of the sleeve 16 has a smaller aperture than the retaining ring 131. The neck hole 161 of the outer diameter is used to allow the sleeve 16 to be rotatably sleeved on the first socket 13 after the neck hole 161 is passed over the retaining ring 131 by utilizing the elastic property of the plastic material. Furthermore, the front portion of the sleeve 16 is provided with a third connecting member 162 for fixing the second connecting member 24, such as a female threaded portion, so that the conveying conduit 2 is fixed in front of the sleeve 16. Moreover, when the second connecting member 24 of the conveying conduit 2 is screwed to the third connecting member 162 of the sleeve 16, the sleeve 16 is advanced along the first connecting tube 13 so that the neck hole 161 is abutted. Connected to the retaining ring 131, the sleeve 16 is formed into a fixed configuration.

Referring to FIG. 3 to FIG. 5 again, the indwelling needle further comprises a conventional puncture device 3, which is composed of a puncture needle 31 and a stop thrombus 32, which is known to the practitioner. Do not repeat them. The thrombus 32 is attached to the rear of the second connecting tube 14 so that the puncture needle 31 is inserted into the antithrombosis 32, the second connecting tube 14, the through hole 151 of the sealing plug 15, the first connecting tube 13 and the delivery catheter 2, so that The hollow needle 312 at the front end of the puncture needle 31 projects from the front end of the soft needle segment 22.

The anterior segment 321 of the occluding thrombus 32 has a fourth connecting member 322 screwed to the second connecting tube 14 , such as a female threaded portion, such that the occluding thrombus 32 is fixed behind the second connecting tube 14 . In particular, the distal end hole 323 of the anti-thrombus 32 is sleeved with a polymer material, such as a hollow seat plug 324 made of silicone.

When the thrombus 32 is fixed to the rear end of the control valve 1, the needle 312 of the elongated needle 311 of the puncture needle 31 passes through and is clamped to the seat plug 324, and passes through the second nozzle 14 and the sealing plug 15 The perforation 151, the first nozzle 13 and the delivery catheter 2 partially expose the needle 312 to the soft needle segment 22.

If the patient is to perform the puncture operation of the indwelling needle, first, the elongated hollow needle 311 of the puncture needle 31 passes through the antithrombosis 32, the second connecting tube 14, the perforation 151 of the sealing plug 15, the first connecting tube 13 and the delivery catheter. 2, and the needle 312 is exposed at the front end of the soft needle segment 22. In use, the finger of the medical staff grasps the thrombus 32 and the puncture needle 31, and pierces the front needle 312 together with the soft needle segment 22 of the delivery catheter 2 into the blood vessel of the patient, because a plurality of guide holes are opened in the front section of the needle segment 22. 23, therefore, when the needle 312 punctures the blood vessel, the blood flows into the needle segment 22 from the guide hole 23, thereby preventing the impedance action by the blood when the puncture needle 31 is punctured.

Then, the medical staff grasps the needle holder 313 of the puncture needle 31, and the needle body 311 is pulled away from the control valve 2 by the delivery catheter 2, and the needle 312 is moved to the seat plug 324 of the thrombus stop 32, that is, The valve handle 153 can be toggled to rotate the sealing plug 15 in the valve chamber 12, so that the through hole 151 and the first and second connecting tubes 13 and 14 are deviated from the shielding state to control the control. The valve 1 forms an open circuit, so that blood in the blood vessel can be prevented from flowing backward and ejected from the rear of the second nozzle 14.

Finally, the puncture needle 31 is disengaged from the throttling block 32 and the second connecting tube 14, and then the conventional infusion tube is attached to the second connecting tube 14, and the valve handle 153 is toggled to make the sealing plug 15 to the valve. Rotating in the chamber 12 until the pair of marks 154 are aligned with the first and second connecting tubes 13 and 14, so that the through holes 151 of the sealing plug 15 and the first and second connecting tubes 13 and 14 form a communicating state on the same axis. In order to form the control valve 1 into a passage type for infusion.

As shown in FIG. 6 , it is a schematic diagram of a second embodiment of the indwelling needle of the present embodiment. The difference between the foregoing embodiments is that the number of the valve handles 153 is two and is axially disposed on the top circumference of the sealing plug 15 . To both sides, the through hole 151 is disposed in parallel with the pair of valve stems 153 such that the pair of valve stems 153 have a pointing function.

Therefore, through the implementation of the present case, the gain of the effect is that the indwelling needle replaces the conventional hose type relay tube with a control valve, and the control valve has a pair of infusions by rotating the control valve. For example, blood or liquid medicine can be used for the function of disconnection control, thereby providing comfort and safety in use of patients during infusion, which is a great structure that has never been seen before.

The disclosure of the present invention is a preferred embodiment. Any change or modification of the present invention originating from the technical idea of the present invention and being easily inferred by those skilled in the art will not deviate from the scope of patent rights of the present invention.

1‧‧‧Control valve

11‧‧‧ valve body

12‧‧‧ valve room

121‧‧‧ buckle groove

13‧‧‧First takeover

131‧‧ ‧ retaining ring

14‧‧‧Second takeover

141‧‧‧First connector

15‧‧‧ Sealing plug

151‧‧‧Perforation

152‧‧‧ buckle

153‧‧‧ valve handle

154‧‧‧ mark

16‧‧‧ casing

162‧‧‧ Third connector

2‧‧‧ delivery catheter

21‧‧‧ joints

22‧‧‧Soft needle section

23‧‧‧ Guide hole

24‧‧‧Second connection

3‧‧‧Puncture device

31‧‧‧Puncture needle

311‧‧‧ needle

312‧‧‧ needle

313‧‧‧ needle seat

32‧‧‧ Stop the thrombus

321‧‧‧ 环

322‧‧‧fourth connector

323‧‧‧ hole

324‧‧‧ 塞塞塞

Claims (10)

An improvement of an indwelling needle, comprising: a control valve having a valve body radially opening a circular valve chamber, the peripheral surface of the valve chamber extending relative to the same axis and communicating with a first nozzle and a second Taking over, and the valve chamber is sleeved with a cylindrical sealing plug, the sealing plug axially defines a perforation that is aligned and communicates with the first and second connecting tubes, and the top surface of the sealing plug extends axially at least one valve handle And a delivery catheter having a joint at the rear of the first adapter, and a soft needle segment extending axially through the front; and the seal is inserted by the valve handle The valve chamber rotates to form a state in which the perforations are in communication with the first and second nozzles on the same axis, or the perforations and the first and second nozzles are in a cut-off state from the shielding. The improvement of the indwelling needle according to the first aspect of the invention, wherein a second connecting member is radially protruded from a rear portion of the joint portion of the conveying conduit; and a tapered retaining ring is protruded from the circumferential surface of the first connecting tube, and further The sleeve includes a sleeve having a neck hole having a diameter slightly smaller than the outer diameter of the retaining ring, and the sleeve is rotatably sleeved on the first joint after the collar is passed over the retaining ring. The front portion of the sleeve is provided with a third connecting member for connecting the second connecting member, so that the conveying conduit is fixed in front of the sleeve. The improvement of the indwelling needle according to claim 1, wherein a plurality of guiding holes are radially opened in the leading edge of the soft needle segment. The improvement of the indwelling needle according to the first aspect of the patent application, wherein the delivery catheter is a tube made of a polymer soft material. An improvement of the indwelling needle according to claim 4, wherein the delivery catheter is a tube made of polyethylene. The improvement of the indwelling needle according to claim 1, wherein the sealing plug and the abutting surface of the valve chamber are provided with a buckle and a buckle groove forming a snap type. The improvement of the indwelling needle according to claim 1, wherein the sealing plug has a pair of pointing marks corresponding to the axial positions of the first and second connecting tubes. The improvement of the indwelling needle according to claim 1, wherein the second connecting end portion is provided with a first connecting member. The improvement of the indwelling needle according to claim 1, wherein the number of the valve handles is two, and the axial direction is disposed on the top side of the sealing plug to face the two sides, and the perforation is parallel to the pair of valve handles. Set to give the pair of valve stems a pointing function. The improvement of the indwelling needle according to claim 1, further comprising a puncture device comprising: a puncture needle having an elongated hollow needle body, wherein the needle body is respectively provided with a hollow needle And a needle holder; and a stopcock having a seat ring attached to the second connector, the second connector is provided with a first connecting member at the end, and the first connecting member is disposed in the seat ring Connecting the fourth connecting member, the stopping bolt is fixed to the rear portion of the second connecting tube, and the central portion of the seat ring axially protrudes from the insertion tube which can be inserted into the rear portion of the opening, and the anti-thrombosis rear seat hole is sleeved a hollow plug made of a polymer material; wherein the hollow needle of the puncture needle passes through the thrombus, the second nozzle of the control valve, the perforation of the sealing plug, the first nozzle and the delivery catheter, and the needle Exposed to the front end of the needle segment.