CN116077756A

CN116077756A - Flushing-free type blood guiding tube for external membrane pulmonary oxygenation instrument

Info

Publication number: CN116077756A
Application number: CN202211347131.8A
Authority: CN
Inventors: 马文莲
Original assignee: Fifth Poeple's Hospitcal Of Chongqing
Current assignee: Fifth Poeple's Hospitcal Of Chongqing
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-05-09

Abstract

The invention belongs to medical instrument consumables, and relates to a flushing-free blood drainage tube for an extracorporeal membrane pulmonary oxygenation instrument, which is characterized in that: the device comprises a blood drawing transfer tube, wherein a blood drawing operation tube joint is arranged on the blood drawing transfer tube, an operation tube is fixed on the blood drawing operation tube joint, a plurality of blood drawing indwelling mechanisms are arranged on the axial direction of a tube body of the operation tube, a sealing plug is positioned in the operation tube and is fixed with a driving mechanism into a whole, and the outer diameter of the sealing plug is matched with the inner diameter of the operation tube. The invention reduces the labor intensity of nurses and improves the blood sampling efficiency of nurses.

Description

Flushing-free type blood guiding tube for external membrane pulmonary oxygenation instrument

Technical Field

The invention belongs to the technical field of medical instrument consumables, and particularly relates to a flushing-free blood drainage tube for an extracorporeal membrane pulmonary oxygenation instrument, which reduces the labor intensity of nurses and improves the blood sampling efficiency of nurses.

Background

External membrane oxygenation, (Extracorporeal Membrane Oxygenation, ECMO for short) is mainly used to provide sustained external respiration and circulation to patients with severe cardiopulmonary failure to sustain patient life. The epicardial pulmonary oxygenation is mainly applicable to patients suffering from cardiac arrest, acute severe heart failure patients, acute severe respiratory failure patients, other diseases severely threatening respiratory circulation functions, organ transplantation support and other diseases. In the current rescue of severe patients with new crown pneumonia, an external membrane oxygenation instrument is also used.

The existing external membrane pulmonary oxygenation instrument mainly comprises an intravascular cannula, a connecting pipe, a power pump (artificial heart), an oxygenator (artificial lung), an oxygen supply pipe, a monitoring system and the like. In operation, blood is drawn from the vein, oxygenated through the membrane lung, and carbon dioxide is expelled, and oxygenated blood may be returned to the vein (V-V transfer) or to the artery (V-Sup>A transfer).

Referring to fig. 1, when the conventional extracorporeal membrane lung oxygenation apparatus is in use, bypass pipes (83) are arranged on a blood inlet pipe (81) and a blood outlet pipe (82) of the extracorporeal membrane lung oxygenation apparatus (80), and the bypass pipes (83) are in threaded connection with an externally connected blood collection pipe. Referring to fig. 1, the existing blood collection tube comprises a threaded connection tube head (84), a blood transfusion tube (85) communicated with the threaded connection tube head (84), and at least two blood collection tube heads (86) connected with the blood transfusion tube (85), wherein the blood collection tube heads (86) are all control valves arranged on the blood transfusion tube (85) by adopting indwelling needles. After blood collection, nurses reversely push the blood in the blood collection tube into the blood inlet tube of the oxygenator or the blood outlet tube of the oxygenator through the syringe, so that the labor intensity is high, and particularly, when reversely pushing the blood in the blood collection tube at the blood outlet tube of the oxygenator into the blood outlet tube of the oxygenator, the nurses are very laborious. Leakage and blood spraying accidents are easy to occur in the blood sampling process. For patients requiring extracorporeal membrane lung oxygenation apparatus, a minimum of 10 times per day is required for general blood sampling assays, which can be seen as a very serious challenge to the physical strength of an on-duty nurse. And the blood sampling tube head (86) needs to be cleaned after each blood sampling, which is time-consuming and labor-consuming.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the flushing-free blood introducing tube for the extracorporeal membrane pulmonary oxygenation instrument, which reduces the labor intensity of nurses and improves the blood sampling efficiency of nurses.

In order to solve the technical problems, the invention adopts the following technical scheme:

an in vitro membrane pulmonary oxygenation appearance is with exempting from to wash formula blood drainage, its characterized in that: the device comprises a blood drawing transfer tube, wherein a blood drawing operation tube joint is arranged on the blood drawing transfer tube, an operation tube is fixed on the blood drawing operation tube joint, a plurality of blood drawing indwelling mechanisms are arranged on the tube body of the operation tube in the axial direction, a sealing plug is positioned in the operation tube and is fixed with a driving mechanism into a whole, and the outer diameter of the sealing plug is matched with the inner diameter of the operation tube;

the driving mechanism further comprises a secondary hydraulic cylinder, the end part of the cylinder body of the secondary hydraulic cylinder is fixed with the outer end of the operation pipe into a whole, a cylinder barrel and a piston rod of the secondary hydraulic cylinder are both positioned in an inner cavity of the operation pipe, the outer diameter of the cylinder barrel of the secondary hydraulic cylinder is matched with the inner diameter of the operation pipe, the cylinder barrel is in contact dynamic sealing connection with the operation pipe, the outer diameter of the piston rod of the secondary hydraulic cylinder is smaller than the inner diameter of the operation pipe, the end part of the piston rod is tightly abutted against the end part of the sealing plug or is fixed with the end part of the sealing plug into a whole, and the piston rod is positioned in the cylinder barrel; the cylinder barrel driving hydraulic medium external connection pipe and the piston rod driving hydraulic medium external connection pipe are positioned on the cylinder body, the cylinder barrel driving hydraulic medium external connection pipe is communicated with the inner cavity of the cylinder body, and the piston rod driving hydraulic medium external connection pipe is communicated with the inner cavity of the cylinder barrel;

when the hydraulic control device is used, a cylinder barrel driving hydraulic medium external connection pipe and a piston rod driving hydraulic medium external connection pipe on a secondary hydraulic cylinder of the driving mechanism are communicated with an external hydraulic source through a hose, a hydraulic pump and a program-controlled flow control valve are arranged on the hose, the hydraulic pump and the program-controlled flow control valve are electrically connected with a control cabinet with a PLC (programmable logic controller), and a starting switch and a blood sampling switch are arranged on the control cabinet with the PLC.

Due to the structure, the labor intensity of nurses is reduced, and the blood sampling efficiency of the nurses is improved.

Drawings

FIG. 1 is a schematic view of a blood collection tube in use;

FIG. 2 is a schematic diagram of the structure of the present invention;

FIG. 3 is a schematic view showing the structure of a blood transfer tube according to the present invention

FIG. 4 is a schematic view showing the structure of the blood collection retention mechanism at the operation tube;

FIG. 5 is an enlarged schematic view of the structure of FIG. 2E according to the present invention;

FIG. 6 is a schematic diagram of a two-stage hydraulic cylinder according to the present invention;

FIG. 7 is a schematic view of the structure of the present invention in an initial state in use;

fig. 8 is a schematic view of the structure of the present invention in a first blood sampling state in use.

Fig. 9 is a schematic structural view of the seal plug in a reset state after the first blood collection in the use of the invention.

Fig. 10 is a schematic view showing a structure of the present invention in a second blood sampling state when in use.

In the figure: 1. a blood transfer tube; 2. a liquid discharge pipe; 3. a blood drawing operation pipe joint; 4. an operating tube; 5. a blood collection retention mechanism; 6. sealing the plugs; 7. a driving mechanism; 8. a pipe joint; 9. a liquid discharge pipe a; 10. a liquid discharge pipe b; 11. an external hydraulic source; 12. a hydraulic pump; 13. a programmable flow control valve; 14. a control cabinet with a PLC controller; 15. opening and closing the valve a; 16. bypass external function tube; 17. opening and closing the valve b; 18. starting a switch; 19. a blood sampling switch; 501. a blood sampling hole; 502. a blocking head; 701. a secondary hydraulic cylinder; 702. a cylinder; 703. a cylinder; 704. a piston rod; 705. the cylinder barrel drives the hydraulic medium to take over; 706. the piston rod drives the hydraulic medium to take over; 707. a guide tube section; 80. an external membrane oxygenation instrument; 81. entering a blood vessel; 82. exiting a blood vessel; 83. a bypass pipe; 84. the pipe head is connected with threads; 85. a blood transfusion tube; 86. a blood sampling tube head.

Detailed Description

In order that those skilled in the art can better understand the present invention, the following technical solutions of the present invention will be further described with reference to the accompanying drawings and examples:

referring to fig. 2 to 10, a flushing-free vascular catheter for an extracorporeal membrane pneumoxymeter, which is characterized in that: the device comprises a blood drawing transfer tube 1, wherein a blood drawing operation tube joint 3 is arranged on the blood drawing transfer tube 1, an operation tube 4 is fixed on the blood drawing operation tube joint 3, a plurality of blood drawing indwelling mechanisms 5 are arranged in the axial direction of a tube body of the operation tube 4, a sealing plug 6 is positioned in the operation tube 4, the sealing plug 6 and a driving mechanism 7 are fixed into a whole, and the outer diameter of the sealing plug 6 is matched with the inner diameter of the operation tube 4;

the driving mechanism 7 further comprises a secondary hydraulic cylinder 701, the end part of a cylinder body 702 of the secondary hydraulic cylinder 701 is fixed with the outer end of the operation pipe 4 into a whole, a cylinder 703 and a piston rod 704 of the secondary hydraulic cylinder 701 are both positioned in an inner cavity of the operation pipe 4, the outer diameter of the cylinder 703 of the secondary hydraulic cylinder 701 is matched with the inner diameter of the operation pipe 4, the cylinder 703 is in contact dynamic sealing connection with the operation pipe 4, the outer diameter of the piston rod 704 of the secondary hydraulic cylinder 701 is smaller than the inner diameter of the operation pipe 4, the end part of the piston rod 704 is tightly abutted against the end part of the sealing plug 6 or is fixed with the end part of the sealing plug 6 into a whole, and the piston rod 704 is positioned in the cylinder 703; a cylinder driving hydraulic medium external connection pipe 705 and a piston rod driving hydraulic medium external connection pipe 706 which are positioned on the cylinder 702, wherein the cylinder driving hydraulic medium external connection pipe 705 is communicated with the inner cavity of the cylinder 702, and the piston rod driving hydraulic medium external connection pipe 706 is communicated with the inner cavity of the cylinder 703;

when the hydraulic control device is used, a cylinder barrel driving hydraulic medium external connection pipe 705 and a piston rod driving hydraulic medium external connection pipe 706 on a secondary hydraulic cylinder 701 of the driving mechanism 7 are communicated with an external hydraulic source 11 through a hose, a hydraulic pump 12 and a program-controlled flow control valve 13 are arranged on the hose, the hydraulic pump 12 and the program-controlled flow control valve 13 are electrically connected with a control cabinet 14 with a PLC (programmable logic controller), and a starting switch 18 and a blood sampling switch 19 are arranged on the control cabinet 14 with the PLC. In this embodiment, the secondary hydraulic cylinder 701 is a commercially available secondary asynchronous hydraulic cylinder, and the secondary asynchronous hydraulic cylinder is arranged at the position, and the different expansion and contraction amounts of the cylinder 703 and the piston rod 704 are skillfully applied to realize the positioning of the cylinder 703 at the same position in the middle of the operating tube 4, so that the piston rod 704 effectively and accurately pushes, compresses and seals the sealing plug 6, and the original blood pumping and transfusion functions of the blood drawing transfer tube 1 after blood sampling are effectively ensured. When the distance between the axes of two adjacent blood sampling indwelling mechanisms 5 on the coaxial line is L, physiological saline is used as medium in the external hydraulic source 11, the starting switch 18 is opened, the starting switch 18 is in a normally open state, the control cabinet 14 with the PLC controls the program-controlled flow control valve 13 on the cylinder barrel driving hydraulic medium takeover 705 and the piston rod driving hydraulic medium takeover 706 and the inner cavity of the cylinder barrel 702 and the inner cavity of the cylinder barrel 703 of the hydraulic pump 12 pair on the pipeline respectively, so that the cylinder barrel 703 and the piston rod 704 are in initial positions as shown in fig. 7, the length of the cylinder barrel 703 extending out of the cylinder barrel 702 is A, and the length of the piston rod 704 extending out of the cylinder barrel 703 is B. The blood sampling switch 19 is opened, the control cabinet 14 with the PLC controls the piston rod to drive the program-controlled flow control valve 13 and the hydraulic pump 12 on the hydraulic medium external connection pipe 706 to work, the piston rod 704 is retracted, the sealing plug 6 is retracted to the lower part of the blood sampling indwelling mechanism 5 at the lowest end position in the operation pipe 4 under the action of the blood pressure in the piston rod 704 and/or the blood drawing switching pipe 1, at the moment, the cylinder 703 and the piston rod 704 are positioned at the position shown in fig. 8, a nurse performs the first blood sampling operation, in the blood sampling process, the sealing plug 6 and the cylinder 703 are used for double sealing on the operation pipe 4, the occurrence of leakage and blood injection accidents during blood sampling is avoided, after the first blood sampling is finished, the blood sampling switch 19 is closed, the control cabinet 14 with the PLC controls the inner cavity of the cylinder 702 and the inner cavity of the cylinder 703 on the pipeline of the hydraulic pump 12 pair of the piston rod and the piston rod 704 on the hydraulic medium external connection pipe 706, and the respective extension amounts of the cylinder 703 are respectively A+L and B-L, the cylinder 703 and the piston rod 704 are positioned at the position shown in fig. 9, the automatic blood sampling process of the cylinder 703 and the piston rod 704 is realized, the whole blood sampling process is free from being reduced, and the flushing labor intensity is almost free, and the labor intensity is not improved. When the second blood collection is needed, the process of opening the blood collection switch 19 is repeated to enable the blood collection switch 19 to be positioned at the position shown in fig. 10, after the second blood collection is completed, the control cabinet 14 with the PLC controller of the blood collection switch 19 is closed to control the program-controlled flow control valve 13 on the cylinder driving hydraulic medium takeover 705 and the piston rod driving hydraulic medium takeover 706 and the hydraulic pump 12 on the pipeline respectively to pump liquid in the inner cavity of the cylinder 702 and the inner cavity of the cylinder 703, so that the respective protruding amounts of the cylinder 703 and the piston rod 704 are respectively +L and L-reduced on the basis of the last time, and preparation is made for the third blood collection. In the whole process, no residual exists in the primary blood sampling, and the blood which is taken by the blood sampling tube section each time is effectively ensured to be the detected blood. In this embodiment, the control cabinet 14 with the PLC controller may also be integrated on the control cabinet of the whole extracorporeal membrane lung oxygenation apparatus 80.

To facilitate the change of operating tube 4 during the shift, in the above embodiment, it is preferable that: the middle part of draw blood transfer tube 1 has two fluid-discharge tubes 2, and the tip of these two fluid-discharge tubes 2 is fixed as an organic wholely with two coupling 8 respectively, two fluid-discharge tubes 2 are fluid-discharge tube a9 and fluid-discharge tube b10 respectively, draw blood operation coupling 3 is located fluid-discharge tube a9, is provided with two on-off valves a15 on fluid-discharge tube a9, and these two on-off valves a15 are located the both sides of drawing blood operation coupling 3 respectively. In this embodiment, the replaced operating tube 4 can be sterilized and cleaned and then reused on the same patient. The use cost and the burden of patients are reduced, and the generation of medical waste is reduced.

Based on the blood sampling test structure, according to the test result, the external dialysis machine can be connected to the blood by the bypass external connection function tube 16 for dialysis, and then the oxygenation process is performed by the external membrane lung oxygenation machine 80, in the above embodiment, it is preferable that: the liquid discharge pipe b10 is provided with a bypass external functional pipe 16, and the bypass external functional pipe 16 is provided with an opening and closing valve b17.

To ensure that the same operating tube 4 is used for one day, in the above embodiment, it is preferable that: the number of the blood collection indwelling mechanisms 5 is 12 to 32. Can be arranged in two rows.

In order to ensure convenience in blood collection, in the above embodiment, it is preferable that: the blood sampling indwelling mechanism 5 is an indwelling needle.

To ensure multiple uses of the operating tube 4, in the above embodiment, it is preferable that: the blood collection retaining mechanism 5 further comprises a blood collection hole 501 communicated with the operation tube 4, and a sealing head 502 made of silica gel and in threaded connection with the blood collection hole 501.

In order to ensure the assemblability, in the above embodiment, it is preferable that: the piston rod driving hydraulic medium external connection pipe 706 is provided with a guide pipe section 707, the axial line of the guide pipe section 707 is parallel to the axial line of the cylinder 703, the guide pipe section 707 penetrates through the cylinder cover 707 of the cylinder 703 and is in contact dynamic sealing connection with the cylinder cover 707, and a liquid outlet of the guide pipe section 707 is positioned in the inner cavity of the cylinder 703.

In order to ensure sealability, in the above embodiment, it is preferable that: the sealing plug 6 is a ball expansion type sealing plug.

All of the above components are commercially available products. The description of the program control is for the understanding of the present invention by those skilled in the art, and is not an invention point to be protected by the present invention. In the above-described embodiment, the respective projecting amounts of the cylinder 703 and the piston rod 704 are controlled by controlling the amounts of physiological saline injected into the inner cavity of the cylinder 702 and the inner cavity of the cylinder 703. In the initial state, physiological saline injected into the inner cavity of the cylinder 702 and the inner cavity of the cylinder 703 are respectively a and b, and each time blood is collected, the physiological saline injected into the inner cavity of the cylinder 702 and the inner cavity of the cylinder 703 are respectively a+x and b-y on the previous basis, wherein x and y are determined according to the diameter of the inner cavity of the cylinder 702 and the diameter of the inner cavity of the cylinder 703.

The foregoing is merely an embodiment of the present invention, and a specific structure and characteristics of common knowledge in the art, which are well known in the scheme, are not described herein, so that a person of ordinary skill in the art knows all the prior art in the application day or before the priority date of the present invention, and can know all the prior art in the field, and have the capability of applying the conventional experimental means before the date, so that a person of ordinary skill in the art can complete and implement the present embodiment in combination with his own capability in the light of the present application, and some typical known structures or known methods should not be an obstacle for a person of ordinary skill in the art to implement the present application. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present invention, and these should also be considered as the scope of the present invention, which does not affect the effect of the implementation of the present invention and the utility of the patent.

Claims

1. An in vitro membrane pulmonary oxygenation appearance is with exempting from to wash formula blood drainage, its characterized in that: the device comprises a blood drawing adapter tube (1), wherein a blood drawing operation tube joint (3) is arranged on the blood drawing adapter tube (1), an operation tube (4) is fixed on the blood drawing operation tube joint (3), a plurality of blood drawing indwelling mechanisms (5) are arranged on the axial direction of the tube body of the operation tube (4), a sealing plug (6) is positioned in the operation tube (4), the sealing plug (6) and a driving mechanism (7) are fixed into a whole, and the outer diameter of the sealing plug (6) is matched with the inner diameter of the operation tube (4);

the driving mechanism (7) further comprises a secondary hydraulic cylinder (701), the end part of a cylinder body (702) of the secondary hydraulic cylinder (701) is fixed with the outer end of the operation pipe (4) into a whole, a cylinder barrel (703) and a piston rod (704) of the secondary hydraulic cylinder (701) are both positioned in an inner cavity of the operation pipe (4), the outer diameter of the cylinder barrel (703) of the secondary hydraulic cylinder (701) is matched with the inner diameter of the operation pipe (4), the cylinder barrel (703) is in contact dynamic sealing connection with the operation pipe (4), the outer diameter of the piston rod (704) of the secondary hydraulic cylinder (701) is smaller than the inner diameter of the operation pipe (4), the end part of the piston rod (704) is tightly abutted against the end part of the sealing plug (6) or is fixed with the end part of the sealing plug (6) into a whole, and the piston rod (704) is positioned in the cylinder barrel (703); a cylinder driving hydraulic medium external connection pipe (705) and a piston rod driving hydraulic medium external connection pipe (706) which are positioned on the cylinder body (702), wherein the cylinder driving hydraulic medium external connection pipe (705) is communicated with the inner cavity of the cylinder body (702), and the piston rod driving hydraulic medium external connection pipe (706) is communicated with the inner cavity of the cylinder body (703);

when the hydraulic control device is used, a cylinder barrel driving hydraulic medium external connection pipe (705) and a piston rod driving hydraulic medium external connection pipe (706) on a secondary hydraulic cylinder (701) of the driving mechanism (7) are communicated with an external hydraulic source (11) through a hose, a hydraulic pump (12) and a program control flow control valve (13) are arranged on the hose, the hydraulic pump (12) and the program control flow control valve (13) are electrically connected with a control cabinet (14) with a PLC (programmable logic controller), and a starting switch (18) and a blood sampling switch (19) are arranged on the control cabinet (14) with the PLC.

2. The flush-free vascular access for an epicardial pulmonary oxygenation machine of claim 1, wherein: the middle part of draw blood transfer tube (1) has two fluid-discharge tubes (2), and the tip of these two fluid-discharge tubes (2) is fixed as an organic wholely with two coupling (8) respectively, two fluid-discharge tubes (2) are fluid-discharge tube a (9) and fluid-discharge tube b (10) respectively, draw blood operation coupling (3) to be located fluid-discharge tube a (9), be provided with two on-off valve a (15) on fluid-discharge tube a (9), these two on-off valve a (15) are located the both sides of drawing blood operation coupling (3) respectively.

3. The flush-free vascular access for an extracorporeal membrane pneumoxymeter according to claim 2, wherein: the liquid discharge pipe b (10) is provided with a bypass external functional pipe (16), and the bypass external functional pipe (16) is provided with an opening and closing valve b (17).

4. The flush-free vascular access for an epicardial pulmonary oxygenation machine of claim 1, wherein: the number of the blood collection indwelling mechanisms (5) is 12 to 18.

5. The flush-free vascular access for an extracorporeal membrane pulmonary oxygenation machine according to claim 1 or 4, wherein: the blood sampling indwelling mechanism (5) is an indwelling needle.

6. The flush-free vascular access for an extracorporeal membrane pulmonary oxygenation machine according to claim 1 or 4, wherein: the blood sampling indwelling mechanism (5) further comprises a blood sampling hole (501) communicated with the operation tube (4), and a sealing head (502) which is made of silica gel and is in threaded connection with the blood sampling hole (501).

7. The flush-free vascular access for an epicardial pulmonary oxygenation machine of claim 1, wherein: the piston rod drives the hydraulic medium to take over (706) and has the direction pipeline section (707), the axial lead of this direction pipeline section (707) is parallel with the axial lead of cylinder (703), this direction pipeline section (707) pass cylinder (707) of cylinder (703) and adopt contact dynamic seal to connect with cylinder (707), the liquid outlet of direction pipeline section (707) is located in the inner chamber of cylinder (703).

8. The flush-free vascular access for an epicardial pulmonary oxygenation machine of claim 1, wherein: the sealing plug (6) adopts a ball expansion type sealing plug.