CN213312291U - Closed blood return machine - Google Patents

Abstract

The utility model discloses a closed blood return machine, which discloses an extracorporeal circulation structure for preventing thrombus from entering a human body through filtering by a return blood vessel internal filtering column in a hemodialysis filtration blood return machine, and is characterized in that an arterial pot is arranged in the dialyzer, one end of an arterial delivery tube is connected with the arterial pot, the other end of the arterial delivery tube penetrates out of the dialyzer, an arterial puncture needle is arranged at the other end of the arterial delivery tube, one end of a pre-flushing side tube is connected with the arterial delivery tube through a tee joint, a physiological saline bag is connected with the other end of the pre-flushing side tube and communicated with the pre-flushing side tube, a second valve is arranged at the joint of the physiological saline bag and the tee joint, a first valve is arranged at the joint of the arterial delivery tube and the tee joint, an arterial clamp is arranged at the position close to the other end of the arterial delivery tube, a blood pump is arranged in the dialyzer, a liquid inlet end of the blood pump is connected with the arterial pot through a pipeline, the other end of the intravenous tube penetrates out of the dialysis machine, and a third valve is arranged on the intravenous tube.

Description

Closed blood return machine

Technical Field

The utility model discloses closed blood return machine relates to a closed blood return machine, belongs to the medical equipment field. In particular to an extracorporeal circulation structure which prevents thrombus from entering a human body through filtering by a filter column in a return blood vessel in a blood dialysis filtering and return blood discharging machine.

Background

Hemodialysis, called hemodialysis for short, also called artificial kidney and kidney washing in popular parlance, is a blood purification technology, which utilizes the principle of semipermeable membrane to remove various harmful and redundant metabolic wastes and excessive electrolytes in vivo out of the body by dispersion and convection so as to achieve the purpose of purifying blood and achieve the purpose of correcting water electrolytes and acid-base balance.

The publication No. CN206381435U discloses an extracorporeal circulation pipeline for a hemodialysis machine in nephrology department, which comprises an arterial tube and a venous tube, wherein a rear arterial tube is connected with the lower end of an arterial kettle, the upper end of the arterial kettle is connected with the other end of a front arterial kettle tube, an exhaust arterial kettle tube and a preposed replacement tube, and the other end of the front arterial kettle tube extends into the arterial kettle and is arranged in the middle of the arterial kettle; the venous tube comprises a venous pot, a venous pot front tube, a rear replacement tube, a venous pressure measuring tube, a venous pot rear tube and a venous administration tube, wherein the upper end of the venous pot is connected with the venous pot front tube, the rear replacement tube and the venous pressure measuring tube, the lower end of the venous pot is connected with the venous pot rear tube, the venous administration tube is arranged on the venous pot front tube, the external circulation tube only has a blood coagulation prevention treatment at the position of an arterial pot, a square blood coagulation structure is lacked for a pipeline between the arterial pot and the arterial front tube, and tiny thrombus inside the pipeline easily enters the human body to cause harm when the arterial front tube carries out machine-off blood return.

Disclosure of Invention

In order to improve the condition, the utility model discloses closed blood return machine under provides one kind and filters the blood return machine under at hemodialysis, filters through the interior filter column of returning the blood vessel, prevents that the thrombus from entering into the extracorporeal circulation structure in the human body.

The utility model discloses closed blood return machine is realized like this: the utility model discloses a closed blood return machine comprises main body unit and filter equipment, the main body unit comprises artery pjncture needle, artery clamp, artery conveying pipe, valve, tee bend, normal saline bag, preflush side pipe, valve, dialysis machine, artery kettle, blood pump, valve, vein conveying pipe, vein clamp and vein pjncture needle, the artery kettle is arranged in the dialysis machine, one end of artery conveying pipe is connected with the artery kettle, the other end of artery conveying pipe is worn out of the dialysis machine, the artery pjncture needle is arranged on the other end of artery conveying pipe, one end of preflush side pipe is connected with artery conveying pipe through tee bend, normal saline bag is connected with the other end of preflush side pipe and is linked together, the junction of normal saline bag and tee bend has valve two, the junction of artery conveying pipe and tee bend has valve one, the artery conveying pipe is arranged near the other end and has artery clamp, the blood pump is arranged in the dialysis machine, the liquid inlet end of the blood pump is connected with the arterial pot through a pipeline, one end of the venous transfusion pipe is connected with the liquid outlet end of the blood pump, the other end of the venous transfusion pipe penetrates out of the dialysis machine, a third valve is arranged on the venous transfusion pipe, the venous puncture needle is arranged at the other end of the venous transfusion pipe, a venous clamp is arranged at the position, close to the other end, of the venous transfusion pipe, the filtering device is composed of a blood return pipe, a filtering column, a liquid feeding pipe and a one-way valve, the blood return pipe is arranged at the position, close to the other end, of the arterial transfusion pipe and at the telecentric end of the arterial clamp, the diameter of the blood return pipe is larger than that of the arterial transfusion pipe, a plurality of groups of filtering columns are arranged in the blood return pipe at equal intervals, the filtering columns are regular hexagonal columns, the side lengths of the plurality of filtering columns are gradually reduced from the proximal end to, the filter column is provided with a convex column, the liquid feeding pipe and the blood return pipe are connected at the position close to the far end, and the liquid feeding pipe is provided with a one-way valve.

Advantageous effects

Firstly, the quantity of thrombus generated in the pipeline between the blood return pipe and the blood pump is reduced.

And secondly, the micro thrombus at the arterial fore-tube part can be filtered and blocked when blood returns from the machine, so that the micro thrombus is prevented from entering a human body along with the blood return.

And thirdly, the whole-process closed blood return reduces the contact pollution of blood and air, and can avoid dialysis and pipeline coagulation caused by pump stop of a machine-unloading pipeline and avoid overhigh venous pressure.

Drawings

Fig. 1 is a schematic structural view of the closed blood returning lower machine of the present invention;

fig. 2 is a schematic structural view of the closed blood returning device of the present invention.

In the attached drawings

Wherein the method comprises the following steps: the device comprises an arterial puncture needle 1, an arterial clamp 2, a blood return tube 3, an arterial infusion tube 4, a first valve 5, a tee joint 6, a physiological saline bag 7, a pre-flushing side tube 8, a second valve 9, a dialysis machine 10, an arterial pot 11, a blood pump 12, a third valve 13, a venous infusion tube 14, a venous clamp 15, a venous puncture needle 16, a filter column 17, a liquid feeding tube 18 and a one-way valve 19.

The specific implementation mode is as follows:

the utility model discloses closed blood return machine is realized like this: the utility model discloses closed blood return machine comprises main part device and filter equipment, and main part device comprises artery pjncture needle 1, artery clamp 2, artery transfusion tube 4, valve 5, tee bend 6, normal saline bag 7, preflush side pipe 8, No. two valves 9, dialysis machine 10, artery kettle 11, blood pump 12, No. three valves 13, vein transfusion tube 14, vein clamp 15 and vein pjncture needle 16, and artery kettle 11 is arranged in dialysis machine 10, and the one end of artery transfusion tube 4 is connected with artery kettle 11, dialysis machine 10 is worn out to the other end of artery transfusion tube 4, and artery pjncture needle 1 is arranged on the other end of artery transfusion tube 4, and the one end of preflush side pipe 8 is connected with artery transfusion tube 4 through tee bend 6, and the other end of normal saline bag 7 and preflush side pipe 8 is connected, No. two valves 9 have been put to the junction of normal saline bag 7 and tee bend 6, No. one valve 5 has been put to the junction of artery transfusion tube 4 and tee bend 6, the artery transfusion tube 4 is provided with an artery clamp 2 near the other end, the blood pump 12 is arranged in the dialysis machine 10, the liquid inlet end of the blood pump 12 is connected with an artery pot 11 through a pipeline, one end of the vein transfusion tube 14 is connected with the liquid outlet end of the blood pump 12, the other end of the vein transfusion tube 14 penetrates out of the dialysis machine 10, the vein transfusion tube 14 is provided with a third valve 13, a vein puncture needle 16 is arranged at the other end of the vein transfusion tube 14, the vein clamp 15 is arranged at the other end of the vein transfusion tube 14, the filtering device is composed of a blood return tube 3, a filtering column 17, a liquid adding tube 18 and a one-way valve 19, the blood return tube 3 is arranged at the position of the other end of the artery transfusion tube 4, the telecentric end of the artery clamp 2 is larger than the diameter of the artery transfusion tube 4, a plurality of groups of filtering columns 17 are equidistantly arranged in the blood return tube 3, the filtering columns 17 are hexagonal regular columns, the side lengths of the plurality of the groups of the filtering columns 17 are gradually, the space between the plurality of filter columns 17 is gradually increased from the proximal end to the distal end of the blood return pipe 3, convex columns are arranged on the filter columns 17, a liquid adding pipe 18 is connected with the blood return pipe 3 at the position close to the distal end, and a one-way valve 19 is arranged on the liquid adding pipe 18;

when the hemodialysis machine 10 is used for prompting blood return after treatment is finished, a nurse confirms that the treatment is finished, whether the blood return normal saline is enough is detected, then gloves are arranged to reduce the blood flow volume to be less than 100ml/min, the arterial line 4 in front of the blood pump 12 is closed through the first valve 5, the pre-flushing side tube 8 controlled by the second valve 9 is opened at the same time, the blood in the residual pre-flushing side tube 8 is returned to the arterial pot 11 through the normal saline, the blood pump 12 is closed, the first valve 5 is opened to return the blood in the arterial line 4 to the body of a patient by utilizing gravity, the blood passes through the blood return pipe 3 during the return, tiny thrombus in the blood is blocked by a gap formed by filter columns 17 distributed on the inner wall of the blood return pipe 3, the blood return is prevented from entering the body, after the blood return is finished, the first valve 5 and the arterial clamp 2 at the arterial puncture needle 1 are closed, then the blood pump 12 is opened, the blood in the blood return line dialysis machine 10 is returned to the body of the patient, after the return transfusion is finished, clamping a venous clamp 15, pulling out the arterial puncture needle 1, then pulling out the venous puncture needle 16, then performing compression hemostasis, replacing cautions for a patient after finishing used objects, and correctly discharging waste liquid, so that thrombus generated in the front arterial tube and the puncture part pipeline can be avoided, and the health of the patient is ensured;

the design that the diameter of the blood returning pipe 3 is larger than that of the arterial transfusion pipe 4 reduces the flow velocity of blood in the blood returning pipe 3, better intercepts thrombus in the blood and avoids omission;

the design that the space between the plurality of filter columns 17 is gradually increased from the proximal end to the distal end of the blood return tube 3 can gradually filter thrombus from large to small, and the filtering effect is good;

the design of the convex column is arranged on the filter column 17, so that thrombus in blood can be grabbed, and the thrombus is prevented from entering blood vessels;

due to the design of the liquid adding pipe 18, a doctor can inject a small amount of anticoagulant into the liquid adding pipe 18 to reduce thrombosis;

the above embodiments are the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any person skilled in the art can make some modifications without departing from the scope of the invention, i.e. all equivalent modifications made according to the invention are intended to be covered by the scope of the invention.

Claims (8)

1. A closed blood returning machine is characterized in that: the device comprises a main body device and a filtering device, wherein the main body device comprises an artery puncture needle, an artery clamp, an artery transmission tube, a first valve, a tee joint, a normal saline bag, a pre-flushing side tube, a second valve, a dialysis machine, an artery kettle, a blood pump, a third valve, a vein transmission tube, a vein clamp and a vein puncture needle, the artery kettle is arranged in the dialysis machine, one end of the artery transmission tube is connected with the artery kettle, the other end of the artery transmission tube penetrates out of the dialysis machine, the artery puncture needle is arranged at the other end of the artery transmission tube, one end of the pre-flushing side tube is connected with the artery transmission tube through the tee joint, the normal saline bag is connected with and communicated with the other end of the pre-flushing side tube, the connection part of the normal saline bag and the tee joint is provided with the second valve, the connection part of the artery transmission tube and the tee joint is provided with the first valve, the artery clamp is arranged at the position of the artery transmission tube close to, one end of the venous transfusion pipe is connected with the liquid outlet end of the blood pump, the other end of the venous transfusion pipe penetrates out of the dialysis machine, a third valve is arranged on the venous transfusion pipe, a venous puncture needle is arranged at the other end of the venous transfusion pipe, the filtering device comprises a blood return pipe, a filtering column, a liquid adding pipe and a one-way valve, the blood return pipe is arranged at the position, close to the other end, of the arterial transfusion pipe, the liquid adding pipe and the blood return pipe are connected at the position, close to the far end, of the arterial clamp, and the one-way valve is arranged on the liquid adding pipe.

2. A closed blood return machine as in claim 1, wherein said iv tube is provided with a venous clamp near the other end.

3. A closed blood return lowering machine according to claim 1, wherein the diameter of said blood return tube is larger than the diameter of the arterial line.

4. A closed blood returning machine as claimed in claim 3, wherein a plurality of sets of filter columns are disposed in the blood returning tube at equal intervals.

5. A closed blood returning machine as claimed in claim 1, wherein the side length of the plural sets of filter columns gradually decreases from the proximal end to the distal end of the blood returning tube.

6. The closed blood returning descending machine according to claim 5, wherein the filtering columns are regular hexagonal columns.

7. A closed blood returning machine as claimed in claim 6, wherein the spacing between the filtering columns is gradually increased from the proximal end to the distal end of the blood returning tube.

8. The closed blood returning machine of claim 7, wherein the filter column has a convex post thereon.

Images