CN213884522U - Same-tube double-cavity pre-charging type tube flushing injector - Google Patents

Abstract

The utility model relates to a with tub two-chamber pre-filled formula wash pipe syringe, including core bar, empty section of thick bamboo and interference fit's rubber piston with it, the top face opposite side of empty section of thick bamboo sets up respectively and is used for communicateing to the nipple of double-chamber pipe. The beneficial effects of the utility model are that use simple and convenient, rational in infrastructure, one-hand operation ensure that the pressure in the double-barrelled is even, reduce the same-barrelled two-chamber pre-filling formula wash pipe syringe that blood backflows. The in-process of messenger's one-hand operation is more stable, avoids leading to stifled pipe to take place because of the washing pipe lock tube, practices thrift nurse operating time, avoids causing cross infection.

Description

Same-tube double-cavity pre-charging type tube flushing injector

Technical Field

The utility model relates to the field of medical appliances, in particular to a prefilled syringe.

Background

At present, the clinical double-cavity central venous catheter access device is widely applied to the fields of critical rescue, bone marrow transplantation and the like, and the correct washing and sealing of the pipeline is an important operation for ensuring that the pipeline is not blocked. In general, more than 10ml of empty needles are used for flushing and sealing a PICC and a CVC double-catheter one cavity by one cavity, and the phenomenon of tube blockage often occurs. In order to solve the problem, some hospitals try to adopt a one-hand operation two pairs of 10ml prefilled syringes (a one-hand double-tube flushing method) to carry out pulse tube sealing, but the operation process needs strict training and control of tube flushing and tube sealing technologies, the method is difficult to control, the operation is inconvenient, and complications such as blood backflow, tube blockage, infection and the like can be caused due to wrong manipulations, uneven force or untight sterile operation.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and solve the problem of difficult use of the prior two wash pipe injectors.

In order to achieve the above object, the present invention provides a common-tube dual-chamber pre-filling type washing tube injector, which comprises a core rod, an empty cylinder and a rubber piston in interference fit therewith, wherein opposite sides of the top end surface of the empty cylinder are respectively provided with a nipple for communicating with the dual-chamber tube.

The term "teat on the opposite side of the top end face of the empty cartridge" as used herein means that the teat is arranged at the output position of the empty cartridge and at a distance as far as possible so as to avoid interference with each other during extrusion. The nipple is externally clamped or screwed with a double-cavity tube.

Preferably, the inner wall of the nipple is provided with a spiral groove, and the axis of the spiral groove is collinear with the axis of the nipple.

The spiral groove can be coaxially arranged in the same nipple, and the same spiral groove is continuous in the nipple and is communicated with the front of the nipple at the outlet of the nipple.

Preferably, the inner wall of the hollow cylinder is annularly provided with at least one ring groove, and the width of the ring groove is smaller than the length of the rubber piston.

The rubber piston can realize interference fit for the ring groove through the elastic characteristic of the rubber piston, besides the interference fit for the inner wall.

Preferably, the distance between the ring grooves is greater than the length of the rubber piston.

The rubber piston length referred to herein is the axial length of the piston.

Preferably, the annular groove is a right-angled trapezoidal groove, and the right-angled side waist of the right-angled trapezoidal groove faces the tail end of the hollow cylinder.

The right-angle side waist refers to one side waist of the right-angle trapezoidal groove with two right angles. The hollow cylinder is provided with two ends in the length direction, the tail end is used for penetrating the rubber piston and the core rod, and the top end is provided with a nipple.

Preferably, the volume of the empty cylinder is 20ml, and the length of the inner cavity of the empty cylinder is 4.5 cm; the top of the core rod is fixed at the bottom of the rubber piston, and the length of the core rod is 7 cm.

Preferably, ring grooves are uniformly distributed on the inner wall of the hollow cylinder along the axial direction, the width of each ring groove is smaller than the length of the rubber piston, and the distance between the ring grooves is larger than the length of the rubber piston; the interval of the ring grooves is 0.5 cm.

The length of the rubber piston is less than 0.5 cm.

By integrating the double nipples to one injector, the device realizes the unified matching with the double-cavity tube, avoids the respective control of the two injectors, can be operated by a single hand and reduces the operation difficulty.

The spiral grooves are distributed to lead out the liquid flow in spiral motion.

By arranging the ring groove, the rubber piston can generate certain clamping stagnation feeling when passing through the ring groove, so that the prompt for a user is formed, and the segmented propulsion is realized; the push mode of one push and one stop can also make the tube flushing liquid generate positive pressure and negative pressure in the catheter cavity to form vortex, increase the overall and uniform flushing of the catheter wall and more effectively reduce the occurrence of blockage.

The length of the rubber piston is set to be smaller than the distance between the ring grooves, so that the rubber piston has definite clamping stagnation feeling in the propelling process, and a user can know the propelling quantity according to the clamping stagnation feeling.

When the pressure of the piston of the common injector is released in the process of flushing and sealing the catheter, the piston can be extruded and rebounded, the hand strength is not easy to control, and the injection dosage cannot be uniform at every time; and the force is too large and the blood is easy to return in the rebound process. Through the annular groove that sets up right trapezoid, let the rubber piston top to right angle side waist form the locking when kick-backing, and pass through the annular groove relatively easily when advancing.

The palm of an Asian nurse is generally small, most Asian nurses can only prop against the root of the thumb to operate in the process of operating the double-cavity tube by the existing standard syringe, and the thenar with larger nerves at the root of the thumb is less sensory insensitive and is easy to apply force unevenly; through the special design of the volume of the hollow cylinder, the length of the inner cavity and the length of the core rod, the human engineering for Asian women is optimized, a nurse can conveniently align the core rod to the large thenar for operation, the operation can be carried out more comfortably and sensitively, and the positive pressure tube sealing is realized.

Through the cooperation of empty section of thick bamboo volume, inner chamber length and the 0.5cm interval of annular, make the volume of pushing at every turn more reasonable, be more convenient for form the vortex.

The beneficial effects of the utility model are that use simple and convenient, rational in infrastructure, one-hand operation ensure that the pressure in the double-barrelled is even, reduce the same-barrelled two-chamber pre-filling formula wash pipe syringe that blood backflows. The in-process of messenger's one-hand operation is more stable, avoids leading to stifled pipe to take place because of the washing pipe lock tube, practices thrift nurse operating time, avoids causing cross infection.

Drawings

FIG. 1 is a schematic view of the same-tube dual-chamber pre-filled type washing tube injector of the present invention;

FIG. 2 is a top schematic view of the same-tube dual-chamber pre-filled type washing tube injector of the present invention;

FIG. 3 is a partial schematic view of a single-tube dual-chamber pre-filled type washing tube injector nipple of the present invention;

wherein:

1-core rod 2-hollow cylinder 3-rubber piston

4-Nipple 5-spiral groove 6-ring groove

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

The same-tube double-cavity pre-filled type wash tube injector shown in fig. 1 to 3 comprises a core rod 1, an empty cylinder 2 and a rubber piston 3 in interference fit with the core rod, wherein the opposite sides of the top end surface of the empty cylinder 2 are respectively provided with a nipple 4 for communicating with a double-cavity tube. The inner wall of the nipple 4 is provided with a spiral groove 5, and the axis of the spiral groove 5 is collinear with the axis of the nipple 4. At least one ring groove 6 is annularly arranged on the inner wall of the hollow cylinder 2, and the width of the ring groove 6 is smaller than the length of the rubber piston 3. The rubber piston 3, by virtue of its elastic properties, can also be interference-fitted to the ring groove 6 in addition to interference with the inner wall. The distance between the ring grooves 6 is greater than the length of the rubber piston 3. The annular groove 6 is a right-angled trapezoidal groove, and the right-angled side waist of the right-angled trapezoidal groove faces the tail end of the hollow cylinder 2.

The volume of the hollow cylinder 2 is 20ml, and the length of the inner cavity of the hollow cylinder is 4.5 cm; the top of the core rod 1 is fixed at the bottom of the rubber piston 3, and the length of the core rod 1 is 7 cm. Annular grooves 6 are uniformly distributed on the inner wall of the hollow cylinder 2 along the axial direction, and the distance between the annular grooves 6 is 0.5 cm.

In actual use, the empty cylinder 2 is filled with 0.9% sodium chloride injection, and each lumen of the matched double-lumen tube is 10ml standard. The nipples 4 are respectively connected with the tail ends of the double-cavity tubes. The nipple 4 can also be provided with a screwing protective cap, when in use, the front end is screwed off the protective cap, the central venous catheter passage double-cavity tube is exhausted, screwed and hermetically connected, and the pulse type catheter sealing is carried out.

The overall effect is as follows:

1. originally, two syringes are changed into an injector, so that the phenomenon of tube blockage caused by uneven pressure of two cavities due to unstable holding force can be avoided;

2. the length of the empty cylinder is shorter than that of the original pre-filled type tube flushing injector of 10ml, so that the operation of nurses in most Asia is facilitated;

3. the operation is simpler and more convenient, the double nipple can be used for flushing the pipe by screwing the double nipple at the tail end of the double-cavity pipe once, and the infection caused by pollution caused by too much assembling and disassembling actions is avoided;

4. the tube washing method is the same as the common pre-filled tube washing injector, and no additional training is needed;

5. the double-cavity pre-filled tube flushing injector with the same tube avoids the simultaneous use of two pairs of empty needles for flushing the tube, saves medical resources and also reduces the economic burden of patients.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the embodiments disclosed, and that various changes and modifications may be made, which are within the scope of the appended claims.

Claims (6)

1. A kind of common-tube double-chamber pre-filled type washing tube injector, including core bar, empty cylinder and its interference fit rubber piston, characterized by that, the said empty cylinder sets up the nipple used for connecting to the double lumen tube separately on the opposite side of top end; the inner wall of the nipple is provided with a spiral groove, and the axis of the spiral groove is collinear with the axis of the nipple.

2. The washpipe injector as in claim 1, wherein the inner wall of the hollow cylinder is circumferentially provided with at least one ring groove, the width of the ring groove being less than the length of the rubber piston.

3. The washpipe injector of claim 2, wherein the spacing of the ring grooves is greater than the length of the rubber piston.

4. The washpipe injector as in claim 2, wherein the annular groove is a right trapezoidal groove with the right angled side waist of the groove facing the trailing end of the hollow barrel.

5. The washpipe syringe as in claim 1, wherein the empty barrel has a volume of 20ml and a lumen length of 4.5 cm; the top of the core rod is fixed at the bottom of the rubber piston, and the length of the core rod is 7 cm.

6. The washpipe injector as claimed in claim 5, wherein annular grooves are uniformly distributed on the inner wall of the hollow cylinder along the axial direction, the width of each annular groove is smaller than the length of the rubber piston, and the distance between the annular grooves is larger than the length of the rubber piston; the interval of the ring grooves is 0.5 cm.

Images