CN209951929U

CN209951929U - Pre-filled type composite catheter flusher

Info

Publication number: CN209951929U
Application number: CN201920535112.5U
Authority: CN
Inventors: 程潇涵; 刘明瀚
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-19
Filing date: 2019-04-19
Publication date: 2020-01-17
Anticipated expiration: 2029-04-19

Abstract

The utility model discloses a pre-filled composite catheter flusher, which is formed by nesting an outer tube component, an inner tube component and a push rod component. Wherein an outer tube cavity is formed between the front end of the inner tube component and the front end of the outer tube component; an inner pipe cavity is formed between the front end of the push rod component and the front end of the inner pipe body, and an isolation valve is arranged at the front end of the inner pipe body. When the injection is not performed, the two chambers are isolated by an isolation valve; when the injection is finished, the front end of the isolation valve is blocked by the inner wall of the front end of the outer pipe body to be opened, so that the inner pipe cavity is communicated with the injection port, the pulse positive pressure type push rod is continued, and the liquid in the inner pipe cavity is injected into the intravenous catheter through the isolation valve and the injection port. The utility model discloses can realize that vein catheterization washes, the shutoff process is once only accomplished, fundamentally has eliminated the medical accident hidden danger that brings because of the process sequence reversal among the current vein catheterization shutoff technique.

Description

Pre-filled type composite catheter flusher

Technical Field

The utility model belongs to the technical field of medical instrument, a fill formula composite catheter flusher that is used for vein catheterization to wash shutoff particularly.

Background

Along with the improvement of medical care and health care consciousness of people, the safety and reliability of the medical treatment and treatment process are concerned more and more by people. For chronic patients who are infused for a long time, tumor patients who need chemotherapy, intensive care patients and the like, a PICC catheter or an infusion port needs to be implanted for long-term infusion or infusion of irritant drugs so as to ensure timely infusion treatment of the patients. The wide application of the vein catheterization technology can avoid the pain of a patient caused by repeated venipuncture, and the catheterization sealing process is one of the important links for ensuring the success of the vein catheterization technology and is the key for keeping the catheter smooth.

The existing vein catheterization tube sealing technology uses two prefilled catheter flushers respectively filled with two different liquid medicines. The clinical tube sealing is mainly carried out in two steps, firstly, a pre-filled catheter flusher filled with a first liquid medicine is connected with a vein placing tube, after injection and cleaning are finished, the flusher is taken down, and then, the pre-filled catheter flusher filled with a second liquid medicine is connected with the vein placing tube for injection and plugging. Because the pre-filled catheter flusher filled with different liquid medicines has consistent appearance and is easy to be confused, and the influence of factors such as manual misoperation is added, the problem that the injection sequence of the two liquid medicines is reversed occurs in the process of clinically arranging the catheter and sealing the catheter, once the problem that the injection sequence is reversed occurs, pain is brought to a patient by a light person, and the health of the patient is threatened in a serious case.

For example, for an infusion catheter needing anticoagulation treatment, the operation process in the prior art is carried out in two steps, firstly, the injection end of a 10ml syringe with 0.9 percent of sodium chloride is connected with the catheter, the syringe is pushed in by liquid medicine pulse positive pressure and then taken down, then, the syringe with 5ml heparin sodium which is configured to be 0.125 unit is connected with the catheter, the syringe is pushed in by liquid medicine pulse positive pressure and then taken down, the sequence cannot be reversed, otherwise, the catheter blockage rate can be greatly improved, and great hidden danger is brought to the subsequent treatment of patients! Once the catheter is blocked by blood coagulation, the treatment of the patient is influenced, the treatment cost is increased, the pain of the patient is increased by implanting the catheter again, and medical disputes are easy to occur. Because the cleaning and the blocking are two different medical processes, the sequence cannot be reversed, and a lot of inconvenience is brought to medical staff in the process management of links such as appliance picking, appliance storage and use in clinic. In addition, the catheter flushing is manually operated, and accidents are out of order in the process.

The problem that the pipe blockage caused by manual operation is fundamentally necessary and urgent to solve is solved in order to eliminate medical hidden troubles, improve the quality of medical service, ensure the health of patients and fundamentally avoid.

Disclosure of Invention

For solving the order reversal problem that current vein catheterization sealing in-process takes place easily, the utility model provides a compound pipe flusher of pre-filling formula, with the pre-filling of two kinds of different liquid medicines in compound pipe flusher of pre-filling formula to realize that two kinds of liquid medicines can pour into the vein in proper order into according to predetermineeing, fundamentally has solved the injection order reversal problem, eliminates medical accident hidden danger, improves work efficiency, reduces intensity of labour.

The utility model discloses compound pipe flusher of pre-filling formula is formed by outer tube subassembly, inner tube subassembly and push rod subassembly nestification.

Wherein, the outer tube subassembly comprises plunger, outer body. The plunger is in threaded connection with the injection port of the outer tube body; the inner pipe assembly consists of an isolation valve, an outer rubber plug and an inner pipe body, and the outer rubber plug is in threaded connection with an injection port of the inner pipe body; the isolation valve is arranged in the mounting hole on the outer rubber plug; the push rod component consists of an inner rubber plug and a push rod body, and the inner rubber plug is in threaded connection with the front end of the push rod body; the inner surface of the outer tube body and the front end face of the outer rubber plug form an outer tube cavity, and the inner surface of the inner tube body and the front end face of the inner rubber plug form an inner tube cavity.

The front end of the isolating valve is provided with a rectangular overflow hole, the center of the isolating valve is provided with a blind hole, and the rear end of the isolating valve is provided with a diversion hole; the isolation valve is arranged in the outer rubber plug mounting hole, when the flow guide hole is positioned in the outer rubber plug, the outer pipe cavity is isolated from the inner pipe cavity, and when the flow guide hole is positioned outside the outer rubber plug, the inner pipe cavity is communicated with the injection port.

When the intravenous catheter is used for initial injection, the plunger is removed, an injection port is communicated with the intravenous catheter, the isolating valve guiding hole is located in the outer rubber plug mounting hole and is blocked by the cylindrical surface of the mounting hole, the isolating valve is in a closed state, the outer tube cavity is isolated from the inner tube cavity by the isolating valve, the outer tube cavity is communicated with the intravenous catheter, the push rod body is pushed by pulse positive pressure, liquid medicine in the outer tube cavity is injected into the intravenous catheter, in the process, when the liquid medicine in the outer tube cavity is about to be completely injected, the front end face of the isolating valve is in contact with the inner wall of the front end of the outer tube body, the push rod body is pushed by continuous pulse positive pressure, the residual liquid medicine in the outer tube cavity is continuously injected into the intravenous catheter through the isolating valve overflow hole until the end face of the outer rubber plug is tightly attached to the inner wall of the front end of the outer tube; in the injection process, the isolation valve is blocked by the inner wall of the front end of the outer tube body, the isolation valve moves towards the inner tube cavity, the flow guide holes simultaneously move out of the outer rubber plug mounting hole, at the moment, the isolation valve is in a conduction state, the inner tube cavity is conducted with the injection port through the flow guide holes, namely the blind holes, pulse positive pressure type pushing of the push rod body is continued, the liquid medicine in the inner cavity is injected into the intravenous catheter until the front end of the inner rubber plug is attached to the front end face of the inner tube body, and the injection of the liquid medicine in the inner tube cavity.

The utility model has the advantages that:

1. the utility model discloses compound pipe flusher of pre-filling formula through structural mistake proofing design, fundamentally has solved current vein and has put the pipe and wash the easy order reversal problem that takes place of shutoff in-process, and prior art eliminates because of the medical accident hidden danger that the process order reversed and bring, has simplified operation flow, realizes that vein puts the pipe and wash, the disposable completion of shutoff process, has both reduced nursing work load, has also improved nursing quality simultaneously, and is safe high-efficient.

2. Compared with the prior art, the pre-filled composite catheter flusher of the utility model reduces the variety of medical instruments and is beneficial to storage and transportation management; the raw material is saved, and the manufacturing cost is reduced.

Drawings

FIG. 1 is a schematic view of the whole structure of the pre-filled composite catheter flusher of the present invention;

FIG. 2 is a schematic structural view of an outer tube assembly in the pre-filled type composite catheter flusher of the present invention;

FIG. 3 is a schematic view of the structure of the inner tube assembly of the pre-filled composite catheter flusher of the present invention;

FIG. 4 is a schematic view of the isolation valve of the pre-filled type composite catheter flusher of the present invention;

FIG. 5 is a schematic view of the structure of the push rod assembly of the pre-filled composite catheter flusher of the present invention;

FIG. 6 is a schematic view showing the isolation state of the outer tube cavity and the inner tube cavity before injection of the pre-filled type composite catheter flusher of the present invention;

FIG. 7 is a schematic view showing the instantaneous state of the pre-filled type composite catheter flusher isolation valve in contact with the inner wall of the front end of the outer tube body;

FIG. 8 is a schematic view of the pre-filled composite catheter flusher of the present invention with the isolation valve in an open state;

fig. 9 is a schematic view of the pre-filled type composite catheter flusher after the liquid medicine injection from the inner and outer chambers is completed.

In the figure:

1-outer tube component 2-inner tube component 3-push rod component

4-outer tube chamber 5-inner tube chamber 101-plunger

102-outer body 102 a-outer body injection port 201-isolation valve

202-outer rubber plug 203-inner tube 204-annular injection channel

201 a-overflow hole 201 b-blind hole 201 c-diversion hole

203 a-inner tube injection port 301-inner rubber plug 302-push rod body

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings

The pre-filled composite catheter flusher of the utility model is formed by nesting an outer tube component 1, an inner tube component 2 and a push rod component 3 from outside to inside as shown in figure 1.

As shown in fig. 2, the outer tube assembly 1 is composed of a plunger 101 and an outer tube 102. Wherein, outer body 102 front end has outer body injection port 102a, and plunger 101 and outer body injection port 102b threaded connection realize the sealed of injection port 102 b. The rear end of the outer tube body 1 is designed with a circumferential flange, which is convenient for holding the catheter flusher during injection.

As shown in fig. 3, the inner tube assembly 2 is composed of an isolation valve 201, an outer rubber plug 202 and an inner tube 203. Wherein, the front end of the inner tube 201 is provided with an inner tube injection port 203a, and the outer rubber plug 202 is in threaded connection with the inner tube injection port 203 a; an outer tube chamber 4 is formed between the front end surface of the outer rubber plug 202 and the inner surface of the outer tube body 102. The isolation valve 201 is mounted in a coaxially designed mounting hole in the outer plug 202.

As shown in fig. 4, the end of the isolation valve 201 is designed with an annular shoulder 201d, and the isolation valve 201 and the outer rubber plug 202 are positioned by the engagement between the annular shoulder 201d and the outer rubber plug part at the rear end of the mounting hole. The front end of the isolation valve 201 is coaxially provided with a blind hole 201 b; three rectangular notches are designed at the end part of the front end of the isolating valve 201 at equal angular intervals in the circumferential direction and serve as overflow holes 201a which are communicated with the blind hole 201 b; meanwhile, three diversion holes 201c communicated with the blind hole 201b are designed in the rear portion of the isolation valve 201 at equal angular intervals in the circumferential direction. The outer diameter of isolation valve 201 is smaller than the inner diameter of inner body injection port 203a, such that when isolation valve 201 is moved back into inner body injection port 203a, an annular injection channel 204 is formed between the outer wall of isolation valve 201 and the inner wall of inner body injection port 203a, as shown in fig. 8.

As shown in fig. 5, the pusher assembly 3 is composed of an inner rubber plug 301 and a pusher body 302. Wherein, the inner rubber plug 301 is in threaded connection with the front end of the push rod body 302; the inner surface of the inner tube 201 and the front end surface of the inner rubber plug 301 form an inner tube chamber 5.

The outer cylindrical surface of the outer rubber plug 202 is provided with sealing convex rings at equal intervals along the axial direction of the outer rubber plug 202, and the sealing convex rings are connected with the inner wall of the outer tube 102 to ensure sealing and reduce the pushing force during injection. The wall of the mounting hole of the outer rubber plug 203 is provided with sealing convex rings at equal intervals along the axial direction of the outer rubber plug 203, so that the sealing performance between the outer pipe cavity 4 and the inner pipe cavity 5 is ensured. Sealing convex rings are arranged on the outer cylindrical surface of the inner rubber plug 301 at equal intervals along the axial direction of the inner rubber plug 301 and are connected with the inner wall of the inner pipe body 203, so that sealing is guaranteed, and the pushing force during injection is reduced.

Use the utility model discloses the vein catheterization shutoff of compound pipe flusher of pre-filling formula can realize that two kinds of different liquid medicines once only inject according to established order and accomplish:

as shown in fig. 6, in order to achieve the pre-injection state of the pre-filled composite catheter flusher of the present invention, the outer chamber 4 is pre-filled with the first liquid medicine, and the inner chamber 5 is pre-filled with the second liquid medicine. At this time, the diversion hole 201c on the isolation valve 201 is located in the installation hole of the outer rubber plug 203, the diversion hole 201c is completely blocked by the outer rubber plug installation hole cylindrical surface 202d, the isolation valve 201 is in a closed state, and the outer pipe chamber 4 and the inner pipe chamber 5 are isolated by the isolation valve 201. During injection, the plunger 101 is removed, the injection port 102a of the outer tube body is communicated with the intravenous tube, the push rod body 302 is pushed by pulse positive pressure, the first liquid medicine in the outer tube cavity 4 is injected into the intravenous tube, and in the process, when the liquid medicine in the outer tube cavity 4 is about to be injected, the front end surface 201d of the isolation valve touches the inner wall 102a of the front end of the outer tube body 102, as shown in fig. 7; the push rod body is pushed in a continuous pulse positive pressure mode, the residual liquid medicine in the outer tube chamber 4 is continuously injected into the venous indwelling catheter through the overflow hole 201a on the isolation valve 201 until the end face of the outer rubber plug 202 is tightly attached to the inner wall of the front end of the outer tube body 102, and all the liquid medicine in the outer tube chamber 4 is injected into the venous indwelling catheter; as shown in fig. 8, during the injection process, the isolation valve 201 is blocked by the inner wall 102a at the front end of the outer tube body, and moves toward the inner tube chamber 5, the flow guide hole 201c simultaneously moves out of the mounting hole of the outer plug 202 until the end of the isolation valve 201 is flush with the inner end face of the inner tube body injection port 203a, at this time, the isolation valve 201 is in a conduction state, so that the inner tube chamber 5 is conducted with the injection port 102b through the annular injection channel 204, the flow guide hole 201c, the blind hole 201b, and the push rod body is continuously pushed by the pulse positive pressure, and the medical fluid in the inner tube chamber 5 is injected into the intravenous catheter until the front end of the inner plug 301 is attached to the front end face of the inner tube body 203, thereby completing the injection of the medical.

After the sequential injection of the outer tube cavity liquid medicine A and the inner tube cavity liquid medicine B is finished, a trace amount of residual liquid medicine exists in the inner hole of the isolating valve 201, the ratio of the total liquid medicine to the total liquid medicine is extremely low, and the normal allowable range is met. However, the total amount of residual liquid left after the injection of the two kinds of liquid medicines is basically the same as that of the prior art (the pre-filling type composite catheter flushing technology can be regarded as zero residue for the liquid medicine in the outer cavity chamber.

Claims

1. The utility model provides a compound pipe flusher of pre-filled formula which characterized in that: the push rod assembly is formed by nesting an outer tube assembly, an inner tube assembly and a push rod assembly; the outer pipe assembly consists of a plunger and an outer pipe body, and the plunger is in threaded connection with an injection port of the outer pipe body; the inner pipe assembly consists of an isolation valve, an outer rubber plug and an inner pipe body, the outer rubber plug is in threaded connection with an injection port of the inner pipe body, and the isolation valve is installed in an installation hole in the outer rubber plug; the push rod component consists of an inner rubber plug and a push rod body, and the inner rubber plug is in threaded connection with the front end of the push rod body; the inner surface of the outer tube body and the front end face of the outer rubber plug form an outer tube cavity, and the inner surface of the inner tube body and the front end face of the inner rubber plug form an inner tube cavity B.

2. A pre-filled composite catheter flusher as set forth in claim 1, wherein: the front end of the isolating valve is provided with a rectangular overflow hole, the center of the isolating valve is provided with a blind hole, and the rear end of the isolating valve is provided with a diversion hole; the isolation valve is arranged in the outer rubber plug mounting hole, when the flow guide hole is positioned in the outer rubber plug, the outer pipe cavity is isolated from the inner pipe cavity, and when the flow guide hole is positioned outside the outer rubber plug, the inner pipe cavity B is communicated with the injection port.

3. A pre-filled composite catheter flusher as set forth in claim 1, wherein: when the end surface of the outer rubber plug is tightly attached to the inner wall of the front end of the outer tube body, the flow guide hole is positioned outside the outer rubber plug.

4. A pre-filled composite catheter flusher as set forth in claim 1, wherein: the tail end of the isolation valve is provided with an annular shoulder which is attached to an outer rubber plug on the periphery of the rear end of the mounting hole, so that the isolation valve is prevented from moving towards an injection port during injection, and sealing between the outer pipe cavity and the inner pipe cavity is facilitated.

5. A pre-filled composite catheter flusher as set forth in claim 1, wherein: the outer diameter of the isolation valve is smaller than the inner diameter of the inner pipe body injection port, so that a gap is formed between the outer wall of the isolation valve and the inner wall of the inner pipe body injection port.

6. A pre-filled composite catheter flusher as set forth in claim 1, wherein: the outer cylindrical surfaces of the outer rubber plug and the inner rubber plug are provided with sealing convex rings.