KR102507037B1 - Closed arterial blood sampling device - Google Patents

Abstract

The present invention relates to a closed arterial blood sampling device. The device comprises: a saline bag which accommodates saline solution and has a first port and a second port at a lower end; an A-line which connects the arterial blood vessel of a patient to the first port and is filled with the saline solution of the saline bag; a first three-way valve installed on the A-line and opening and closing the A-line; a blood collection unit which collects arterial blood through the first three-way valve when the first three-way valve blocks the A-line; a second three-way valve provided between the first three-way valve and the first port and opening and closing the A-line; an induction tube which connects the second three-way valve and the second port and is filled with the saline solution in the saline bag; and a fluid transfer means which operates when the A-line and the induction tube are connected by the operation of the second three-way valve and transfers the fluid in the induction tube. The closed arterial blood sampling device of the present invention does not cause thrombosis in initial blood collected and leaves no residual blood after flushing, thereby enabling safe use. In addition, there are no obstructions which disturb pulse signals between the arterial blood vessel of the patient and a transducer, thereby enabling accurate monitoring. In addition, the device can be easily connected to existing blood collection devices, thereby achieving excellent usability.

Description

Closed arterial blood sampling device {Closed arterial blood sampling device}

The present invention relates to an arterial blood collection device, and more particularly, when arterial blood is collected, initial blood diluted with physiological saline is withdrawn from the ductus arteriosus, internal blood is collected as much as the required amount of blood is collected, and the initial blood is returned to the body. An arterial blood occlusion blood collection device capable of minimizing the patient's blood loss burden that occurs every arterial blood collection by retransfusion.

An arterial line (A-line) is a tool for observing a patient's hemodynamic state, such as blood pressure or pulse, and collecting arterial blood. The ductus arteriosus consists of a catheter inserted into the artery, a tube connecting the saline solution bag, and a 3-way valve installed in the tube. In addition, a transducer that converts a pulse into an electrical signal is connected to the tube. The electrical signal generated through the transducer is transmitted to the monitor, and the doctor or nurse can check the patient's condition through the monitor.

Among patients admitted to the Intensive Care Unit (ICU), patients undergoing ductus arteriosus for arterial pressure monitoring, arterial blood gas analysis, complete blood count, and general chemistry tests (Blood Internal blood is collected using the ductus arteriosus when tests such as the Chemistry Examination) are performed.

In general, when blood is collected through the ductus arteriosus, internal blood is taken after discarding the first blood of about 5 cc. Superblood is the blood that comes out when the collection starts, and internal blood is the blood after the superblood has passed. The reason why the super blood is discarded is that accurate test results cannot be obtained because the super blood is mixed with heparin or diluted in contact with saline even without heparin.

In the case of a patient hospitalized in an intensive care unit, since blood is drawn frequently every day, anemia is bound to occur in the patient. Depending on the patient's condition, arterial blood gas analysis may be performed at least once a day or at most every hour, dozens of times a day. Therefore, the amount of blood collected per day from critically ill patients is at least about 26 ml and at most 478 ml or more. Also, the amount of blood actually lost from the patient is greater than this because it is discarded in super blood every time the test is performed. According to one report, the incidence of moderate to severe anemia per 50cc blood collection is over 18%, and it is known that 97% of inpatients are anemic due to frequent blood collection.

As for solving the problem of blood collection, Edwards Lifesciences' VAMP) has been known. A VAMP (hereinafter referred to as a conventional product) is a blood sampling device in which initial blood is confined in an external reservoir without being discarded, internal blood is taken, and then initial blood is transfused into the body again.

However, the conventional product has a disadvantage that it can cause thrombosis in the initial blood. The reason for this is because the accumulated blood has the property of hardening quickly. In addition, as the initial blood flows into the reservoir, the cross-sectional area is greatly enlarged, and when the initial blood accommodated in the reservoir is transfused back into the patient's body, it is subjected to pressure, so the possibility of clot formation increases.

In addition, in conventional products, since the reservoir is installed between the catheter and the transducer, a damping phenomenon occurs in the arterial blood pressure monitoring of the transducer. It acts as an obstacle, so to speak, to disturb the pulse signal from the arterial vessel to the transducer.

Korean Registered Patent Publication No. 10-1814552 (2018.01.05.) Korean Patent Publication No. 10-2021-0094016 (2021.07.28.)

The present invention has been created to solve the above problems, and it is possible to use safely because it does not generate blood clots, allows the transducer to perform accurate operation, and can be used in connection with existing blood collection devices. there is

An arterial blood occlusion blood collection device of the present invention as a means of solving problems for achieving the above object includes a cell line bag containing saline and having a first port and a second port at a lower end; A line connecting the patient's arterial blood vessel and the first port and filling the saline solution of the cell line bag; A first three-way valve that opens and closes the A-line while being mounted on the A-line; a blood collection unit for collecting arterial blood through the first three-way valve when the first three-way valve blocks the A-line; a second three-way valve provided between the first three-way valve and the first port and opening and closing the A-line; An induction tube connecting the second three-way valve and the second port and filled with the saline solution of the cell line bag; A fluid transfer unit is operated when the A-line and the induction tube are connected by the operation of the second three-way valve and transfers the fluid in the induction tube to the cell line bag side.

In addition, a transducer is mounted on the line A to convert the pulse signal of the patient's artery, which is transmitted using saline as a medium, into an electrical signal and transmit it to an external patient monitor.

In addition, the A line; It includes a catheter having a blood collection needle and connected to the first three-way valve, a proximal tube connecting the first three-way valve and the second three-way valve, and a distal tube connecting the second three-way valve and the first port.

In addition, the fluid moving means; A pump is included that pressurizes the outer circumferential surface of the induction tube in the longitudinal direction to push and move the blood inside the induction tube in the longitudinal direction of the induction tube.

A check valve is installed between the pump and the second port to prevent the fluid flowing from the proximal tube through the second three-way valve to the induction tube from flowing into the second port.

In addition, between the pump and the check valve, when the internal pressure of the induction tube increases due to the operation of the pump, an accumulator for receiving and accumulating the increased pressure is further installed.

In addition, the pressure storage unit; It is provided with a pressure-resistant cylinder that accommodates compressible gas and saline water and displays the level of saline water according to changes in internal pressure.

In addition, to the pressure-resistant cylinder; It is connected to a pressure sensor that detects the pressure inside the pressure cylinder, a water level sensor that detects the level of saline water, and a pressure sensor and a water level sensor, and outputs a signal when the change in pressure and water level inside the pressure cylinder exceeds the set range. A control module, and a pressure lamp and a water level lamp driven by the control module are further provided.

And, a temperature maintaining unit for maintaining the temperature of the fluid in the A-line or the induction tube at the patient's body temperature is installed.

In addition, the temperature maintaining unit; It includes a constant temperature jacket that surrounds the A-line or induction tube, a temperature controller that controls the temperature of the constant temperature jacket, and an indicator lamp that turns on when the heating temperature of the constant temperature jacket is within a normal range.

The arterial blood collection device of the present invention configured as described above can be safely used because there is no clot in the initial blood collected and no residual blood remains after flushing.

In addition, between the patient's arterial blood vessel and the transducer, there is no obstruction that disturbs the pulse signal, enabling accurate monitoring.

In addition, since it can be easily connected to an existing blood sampling device, the utilization is excellent.

1 is a diagram showing the configuration of an arterial blood occlusion blood sampling device according to an embodiment of the present invention.
FIG. 2 is a diagram showing the connection relationship of each part of the blood sampling device shown in FIG. 1;
3 to 6 are views for explaining a method of collecting blood using the blood sampling device of FIG. 1 .
FIG. 7 is a view separately showing the pressure accumulator chamber shown in FIG. 1;
8 is a view showing a modified example of the pressure accumulator chamber of FIG. 7;
9 is a view showing a modified example of the arterial blood occlusion blood collection device according to an embodiment of the present invention.
FIG. 10 is a view for explaining an operation method of the constant temperature jacket shown in FIG. 9 .

Hereinafter, one embodiment according to the present invention will be described in more detail with reference to the accompanying drawings.

The arterial blood collection device of the present invention, which is mainly used in an intensive care unit of a hospital, minimizes the occurrence of anemia in a patient due to frequent blood collection. The basic principle of preventing anemia is to retransfuse blood into the patient's body without discarding the initial blood (which has been discarded) during blood collection. 'Initial blood' is blood in contact with heparin-containing saline. That is, the blood diluted with saline and mixed with heparin is the initial blood.

The arterial blood occlusion blood collection device of the present invention includes a cell line bag containing saline and having a first port and a second port at a lower end; A line connecting the patient's arterial blood vessel and the first port and filling the saline solution of the cell line bag; A first three-way valve that opens and closes the A-line while being mounted on the A-line; a blood collection unit for collecting arterial blood through the first three-way valve when the first three-way valve blocks the A-line; a second three-way valve provided between the first three-way valve and the first port and opening and closing the A-line; An induction tube connecting the second three-way valve and the second port and filled with the saline solution of the cell line bag; By the operation of the second three-way valve, it operates when the A-line and the induction tube are connected, and has a basic configuration of a fluid transport means for transporting the fluid in the induction tube.

1 is a diagram schematically showing the configuration of an arterial blood collection device 20 according to an embodiment of the present invention, and FIG. 2 is a configuration diagram showing the connection relationship between parts of the blood collection device shown in FIG. 1 .

As shown, the arterial blood occlusion blood collection device 20 according to the present embodiment includes a cell line bag 21, an A line 23, a first three-way valve 25, a blood sampling unit, and a second three-way valve 28. , an induction tube 35, a fluid transfer means, a touch panel 38, a check valve 37, and an accumulator chamber 39.

The cell line bag 21 is a plastic bag containing saline solution therein, and has a first port 21b and a second port 21e at the lower end. Inside the cell line bag 21, a pressure of about 300 mmHg is maintained. In addition, in order to adjust the internal pressure of the cell line bag 21 as needed, a manual compressor 22 is connected to the cell line bag 21. The manual compressor 22 is a general compression means that the user holds and handles by hand. In addition, the saline solution in the cell line bag 21 contains heparin. Heparin is pre-injected through port A or port B. The cell line bag 21 is mounted on the upper end of the pole 17 like a normal saline solution bag.

The A line 23 provides a passage connecting the patient's arterial blood vessel 14 and the first port 21b. The saline solution of the cell line bag is filled inside the passage of the A line 23, and the water pressure of the saline solution and the pressure inside the cell line bag 21 are transmitted to the lower end of the A line 23, that is, the distal end of the catheter 23c. .

This A-line 23 has a catheter 23c, a proximal tube 23a, and a distal tube 23b. The catheter 23c is a tube having a blood collection needle 23d at one end and connected to the first three-way valve 25 at the other end. When the blood collection needle 23d penetrates the arterial blood vessel 14, the arterial blood flows out through the blood collection needle 23d to the catheter 23c.

The proximal tube 23a connects the first three-way valve 25 and the second three-way valve 28, and the distal tube 23b is a flexible tube connecting the second three-way valve and the first port 21b. The proximal tube 23a communicates with the catheter 23c through the first three-way valve 25, and the distal tube 23b communicates with the proximal tube 23a through the second three-way valve 28.

The saline solution of the cell line bag 21 passes through the first port 21b, the distal port 23b, the second three-way valve 28, the proximal tube 23a, the first three-way valve 25, and the catheter 23c. It can pass through and reach the arterial blood vessel (14). The lengths of the proximal tube 23a and the distal tube 23b may vary as needed.

The first three-way valve 25 is a 3-way valve that opens and closes the passage of the A-line while being mounted on the A-line. If the A line is opened, saline or blood can flow inside the A line, and if the A line is blocked, the flow path of the saline or blood is blocked.

As shown enlarged in FIG. 1, the first three-way valve 25 has a catheter fixing port 25b, a tube connection port 25c, a blood collection port 25e, and a switching lever 25a.

The catheter fixing port 25b is a hole to which the end of the catheter 23c is fixed, and the tube connection port 25c is a passage through which one end of the proximal tube 23a is coupled. Also, the blood collection port 25e is a passage through which blood is collected from the catheter 23c. Blood collection may be performed by connecting a blood collection unit, that is, a blood collection syringe (41 in FIG. 5) to the blood collection port 25e.

The blood collection unit collects arterial blood through the blood collection port 25e of the first three-way valve when the A-line 23 is blocked by the first three-way valve 25, and includes a blood collection syringe 41. The doctor or nurse performs blood collection by connecting the blood collection syringe 41 to the blood collection port 25e after rotating the switching lever 25a.

The switching lever 25a is a manual lever that switches the flow path inside the first three-way valve 25. By rotating the switching lever 25a, the catheter 23c and the proximal tube 23a are connected and the blood collection port 25e is blocked at the same time, or the catheter 23c and the proximal tube 23a are blocked and the catheter 23c It is as described above that the blood collection port 25e can be communicated with.

The second three-way valve 28 is also a 3-way valve having the same configuration as the first three-way valve 25. The second three-way valve 28 includes first, second, and third ports 28b, 28c, and 28d and a switching lever 28a. The first port 28b is connected to the proximal tube 23a, the second port 28c is connected to the distal tube 23b, and the third port 28d is connected to the guide tube 35, respectively.

The switching lever 28a switches the internal flow path of the second three-way valve 28 to connect the proximal tube 23a and the distal tube 23b and at the same time block the induction tube 35 or close the proximal tube 23a. and the induction tube 35 are connected, and the distal tube 23b is blocked. The second three-way valve 28 and the transducer 27 may have one body. However, the second three-way valve 28 may be installed separately from the transducer 27.

The transducer 27 receives the pulse signal of the patient's artery transmitted using saline as a medium, converts it into an electrical signal, and transmits the converted electrical signal to the external patient monitor 31. Since the structure and function of the transducer 27 itself are general, a description thereof will be omitted.

On the other hand, the induction tube 35 is a flexible tube having one end connected to the third port 28d of the second three-way valve 28 and the other end connected to the second port 21e of the cell line bag 21 . The saline solution of the cell line bag is filled inside the passage of the induction tube 35. The length of the induction tube 35 can also be varied as needed.

The induction tube 35 is a tube integrally formed as a whole, and for convenience of description, based on the pump 33, it can be divided into a first induction pipe part 35a and a second induction pipe part 35b. The first guide pipe part 35a is a part connecting the second three-way valve 28 and the pump 33, and the second guide pipe part 35b is a part connecting the pump 33 and the second port 21e. . The lengths of the first guide pipe portion 35a and the second guide pipe portion 35b may also be different.

A pump 33, a check valve 37, and an accumulator chamber 39 are installed in the guide tube 35.

The pump 33 operates when the proximal tube 23a and the induction tube 35 are connected by the operation of the second three-way valve 28, and transfers the fluid (saline, initial blood) in the direction of the arrow a. It is a fluid transfer device.

The pump 33 is a peristaltic pump that presses the outer circumferential surface of the induction tube 35 in the longitudinal direction to push and move the fluid inside the induction tube in the longitudinal direction of the induction tube. In such a pump 33, a housing 33b providing a support circumferential surface 33c of a certain curvature, a rotor 33e built in the housing 33b and rotating in both directions, and a motor for rotating the rotor 33e (not shown) ), and a plurality of pressure rolls 33f fixed to the radial end of the rotor 33e.

The guide tube 35 is pressed by the pressure roll 33f in a state supported by the support circumferential surface 33c inside the housing. The pressure roll 33f presses and rotates the guide tube 35 to transfer the fluid inside the guide tube 35. Reference numeral 33a denotes an operating button. The operation button 33a is a button for turning on/off the pump 33 or changing the rotation direction of the rotor 33e.

The touch panel 38 controls the operation of the pump 33 more precisely, and displays the pumping amount, pumping time, and internal pressure of the second guide pipe 35b in real time. A doctor or nurse can visually check the operation status of the blood sampling device 20 through the touch panel 38 .

In addition, through the touch panel 38, the operation time of the pump 33 or the rotational speed or number of revolutions of the rotor may be input in advance, and furthermore, the first three-way valve 25 and the second three-way valve 28 ) is implemented in an electronic control method, the first and second three-way valves 25 and 28 can be operated with the touch panel 38.

On the other hand, the check valve 37 is installed between the second port 21e and the pressure accumulation chamber 39, and when the fluid inside the guide tube 35 moves in the direction of the arrow a, the pressure accumulation chamber 39 Prevents compressed air from penetrating into the cell line bag 21. The saline solution in the cell line bag 21 may go down to the induction tube 35 through the check valve 37.

The pressure accumulator chamber is a closed container that stores the pressure of the fluid flowing into the pressure chamber by the operation of the pump 33 . The pressure accumulated in the pressure accumulator chamber 39 serves to push the fluid when the pump 33 reversely rotates and the fluid in the guide tube 35 moves in the direction of the arrow c.

7 shows the configuration of the pressure accumulator chamber 39.

As shown in Fig. 7, the pressure accumulator chamber 39 has an internal pressure cylinder 39a, an upper cap 39b, and a lower cap 39d. The pressure-resistant cylinder 39a is a cylindrical transparent member having upper and lower portions open and having graduations 39s marked on its outer circumferential surface. The pressure-resistant cylinder 39a can be made of acrylic or glass.

The upper cap 39b serves as a stopper for blocking the upper end of the pressure-resistant cylinder 39a, and the lower cap 39d blocks the lower end of the pressure-resistant cylinder, and has connection ports 39c and 39e, respectively. The connection ports 39c and 39e are coupled to the second guide tube 35b. The saline solution descending from the cell line bag 21 passes through the upper cap 39b and is filled into the pressure resistant cylinder 39a. In addition, the saline solution inside the pressure accumulator chamber 39 flows downward through the connection port 39e.

Compressible gas and saline are accommodated in the pressure accumulator chamber 39 . The compressible gas may be air. Since the check valve 37 is disposed above the pressure accumulator chamber 39, air is confined in the space above the check valve 37 and the liquid level of the saline solution S.

The air is compressed when the fluid inside the induction tube 35 is pushed in the direction of arrow e in FIG. 7 by the operation of the pump 33, that is, when the level of the saline solution S increases. The compressed air expands when the pump 33 rotates in reverse and transfers the expansive force to the fluid. That is, when the fluid inside the induction tube 35 moves in the direction of arrow c in FIG. 6, the fluid is pushed to make the fluid move more quickly.

The water level of the saline solution inside the pressure accumulator chamber 39 can be visually checked through the scale part 39s. If the level of the saline solution rises by 20 ml, the amount of fluid flowing into the pressure accumulator 39 is 20 ml, which means that 20 ml of blood is collected from the arterial vessel of the patient.

The operation of the blood sampling device 20 of this embodiment having the above structure is performed as follows.

3 to 6 are diagrams for explaining a method of collecting arterial blood using the blood sampling device 20 of FIG. 1 .

3 shows a state in which the A line 23 is completely open. That is, the catheter 23c and the proximal tube 23a, and the proximal tube 23a and the distal tube 23b are connected. At this time, the inside of the A line 23 is filled with heparin-containing saline.

In addition, the pressure inside the A-line 23 and the pressure of the arterial blood vessels are equally set to atmospheric pressure through a separate zeroing process. The beating of the heart is transmitted to the transducer 27 using arterial blood and saline inside the proximal tube 23a as a medium, and the transducer 27 converts the beating signal into an electrical signal and transmits it to the patient monitor 31.

To collect blood in this state, the second three-way valve 28 is switched to communicate the proximal tube 23a and the induction tube 35, and at the same time the pump 33 is operated to connect the proximal tube 23a and the induction tube. The saline solution filled in (35) is moved in the direction of arrow a in FIG.

As the saline solution is transferred in the direction of the arrow a, the blood inside the arterial vessel 14 escapes from the arterial vessel and moves along the saline solution, passing through the first three-way valve 25. The flow rate of the fluid moving in the direction of arrow a is grasped through the scale portion 39s of the pressure accumulator chamber 39. It is possible to measure the amount of blood drawn through the graduation part.

As the above process is performed, the initial blood Z1 and the internal blood Z2 are induced into the proximal tube 23a and the induction tube 35. Since the internal volumes per unit length of the proximal tube (23a) and the induction tube (35) are fixed, the position of the boundary between the initial blood and the internal blood is easily determined by controlling the pump once the number of ml of initial blood is determined. can be adjusted A boundary between the initial blood Z1 and the internal blood Z2 may be between the first three-way valve 25 and the second three-way valve 28. Also, the boundary line between the initial blood Z1 and the saline solution S may be between the second three-way valve 28 and the pump 33.

If the internal blood Z2 passes through the first three-way valve 25 through the above process, the switching lever 25a of the first three-way valve 25 is turned to open the blood collection port 25e, and the blood collection port 25e Insert the blood sampling syringe (41) to collect the internal blood.

When the collection of internal blood is completed, the first three-way valve 25 is opened again and the pump 33 is rotated in reverse. As the pump rotates in reverse, the remaining internal blood, initial blood, and saline move in the direction of the arrow c, and the internal blood and initial blood are retransfused into the arterial vessel 14 . At this time, the compressed air inside the pressure accumulator 39 expands and pushes the saline solution.

If the internal blood and initial blood flowed back into the arterial blood vessel 14, operate the second three-way valve 28 to connect the proximal tube 23a and the distal tube 23b, block the induction tube 35, and collect blood finish the course

FIG. 8 is a view showing a modified example of the pressure accumulator chamber 39 of FIG. 7 .

The same reference numerals as the above reference numerals indicate the same members with the same functions.

The pressure accumulator chamber 39 shown in Fig. 8 has a pressure sensor 39g and a water level sensor 39f inside the internal pressure cylinder 39a. The pressure sensor 39g is a sensor that detects a change in internal pressure of the internal pressure cylinder 39a, and the water level sensor 39f is a sensor that detects a change in the water level of the saline solution S. As described above, as the fluid moves in the direction of arrow a in FIG. 2 by the pump 33, the level of the saline solution rises and the internal pressure rises at the same time, and the change in the level and pressure at this time is sensed. .

Information detected by the pressure sensor 39g and the water level sensor 39f is transmitted to the control module 39h. The control module 39h turns on the pressure lamp 39m and the water level lamp 39k when the pressure and water level inside the pressure storage chamber 39 change beyond a set range. The pressure lamp 39m and the water level lamp 39k are LED lamps. A doctor or nurse using the blood sampling device 20 can immediately grasp the internal situation of the accumulator pressure lamp 39 through the pressure lamp 39m and the level lamp 39k without having to check the scale 39s. .

FIG. 9 is a view showing an example in which the constant temperature jacket 47 is applied to the arterial blood occlusion and blood sampling device 20 according to an embodiment of the present invention, and FIG. 10 is for explaining the operation method of the constant temperature jacket shown in FIG. 9 it is a drawing

Referring to the drawing, it can be seen that the constant temperature jacket 47 surrounds the proximal tube 23a and the induction tube 35. The constant temperature jacket 47 maintains the temperature of the fluid remaining in the proximal tube 23a and the induction tube 35 at the patient's body temperature, and constitutes a temperature maintaining unit together with the temperature controller 51 and the display lamp 53. .

As shown in FIG. 10, the constant temperature jacket 47 contains a heating wire 47a. The heating wire 47a generates heat by electricity transmitted from the temperature controller 51 and maintains the constant temperature jacket 47 at a set temperature. The temperature controller 51 controls the temperature of the constant temperature jacket 47.

In addition, the display lamp 53 is an LED lamp that is turned on when the heating temperature of the constant temperature jacket 47 is within a normal range. Through the indicator lamp 53, it can be visually confirmed that the temperature of the fluid inside the second induction pipe part 35b is maintained at the body temperature of the patient. By applying the temperature maintaining unit in this way, the generation of blood clots can be suppressed as much as possible. If necessary, the temperature of the constant temperature jacket 47 may be operated higher or lower than the body temperature. In addition, the installation position of the constant temperature jacket 47 can also be varied.

In the above, the present invention has been described in detail through specific embodiments, but the present invention is not limited to the above embodiments, and various modifications are possible by those skilled in the art within the scope of the technical idea of the present invention.

14: arterial blood vessel 17: pole 20: blood collection device
21: cell line bag 21b: first port 21e: second port
22: manual compressor 23: A line 23a: proximal tube
23b: distal tube 23c: catheter 23d: blood collection needle
25: first three-way valve 25a: switching lever 25b: catheter fixing port
25c: tube connection port 25e: blood collection port 27: transducer
28: second three-way valve 28a: switching lever 28b: first port
28c: second port 28d: third port 31: patient monitor
33: pump 33a: operation button 33b: housing
33c: support surface 33e: rotor 33f: pressure roll
35: induction tube 35a: first induction pipe part 35b: second induction pipe part
37: check valve 38: touch panel 39: pressure chamber
39a: pressure-resistant cylinder 39b: upper cap 39c: connection port
39d: lower cap 39e: connection port 39f: water level sensor
39g: pressure sensor 39h: control module 39k: water level lamp
39m: pressure lamp 39s: scale 41: blood collection syringe
47: constant temperature jacket 47a: heating wire 51: temperature controller
53: display lamp

Claims (10)

A cell line bag containing saline and having a first port and a second port at the lower end;
A line connecting the patient's arterial blood vessel and the first port and filling the saline solution of the cell line bag;
A first three-way valve that opens and closes the A-line while being mounted on the A-line;
a blood collection unit for collecting arterial blood through the first three-way valve when the first three-way valve blocks the A line;
a second three-way valve provided between the first three-way valve and the first port and opening and closing the A-line;
An induction tube connecting the second three-way valve and the second port and filled with the saline solution of the cell line bag;
By operating the second three-way valve, it operates when the A line and the induction tube are connected and includes a fluid transfer means for transferring the fluid in the induction tube to the cell line bag side,
A line is
A catheter having a blood collection needle connected to the first three-way valve, a proximal tube connecting the first three-way valve and the second three-way valve, and a distal tube connecting the second three-way valve and the first port,
In the state of bypassing the induction tube through the second three-way valve, the cell line bag and the arterial blood vessel are directly connected, the cell line bag saline is received, and the pulse signal of the patient's artery is transmitted through the saline solution,
A transducer is installed that converts the pulse signal of the patient's artery transmitted using saline as a medium into an electrical signal and transmits it to an external patient monitor;
blood collection department,
In a state in which the distal tube between the first port and the induction tube is closed through the first three-way valve, the proximal tube and the induction tube communicate with each other through the second three-way valve, and the arterial blood is moved along the saline solution from the arterial blood vessel to the induction tube, proximal The patient's arterial blood is collected from the tube,
The fluid transport means,
In a state where the distal tube between the first port and the induction tube is closed through the first three-way valve and the proximal tube and the induction tube are communicated through the second three-way valve, initial blood and blood flow between the first and second three-way valves. The outer circumferential surface of the induction tube is pressed in the longitudinal direction so as to place the boundary line of the internal blood and the boundary line of the initial blood and saline between the second three-way valve and the fluid transport means, and the arterial blood inside the induction tube is discharged in the longitudinal direction of the induction tube Including a pump that moves to push,
Arterial blood occlusion blood collection device. delete delete delete According to claim 1,
Between the pump and the second port,
A check valve is installed to prevent the fluid flowing from the proximal tube through the second three-way valve to the induction tube from flowing into the second port,
Arterial blood occlusion blood collection device. According to claim 5,
Between the pump and the check valve,
When the internal pressure of the induction tube rises due to the operation of the pump, an accumulator for receiving and accumulating the rising pressure is further installed,
Arterial blood occlusion blood collection device. According to claim 6,
The pressure accumulator;
A pressure-resistant cylinder accommodating compressible gas and saline and showing externally the level of saline according to changes in internal pressure,
Arterial blood occlusion blood collection device. According to claim 7,
to the pressure-resistant cylinder;
A pressure sensor for sensing the pressure inside the pressure-resistant cylinder;
A water level sensor for detecting the level of saline water;
A control module that is connected to a pressure sensor and a water level sensor and outputs a signal when the pressure and water level inside the pressure resistant cylinder change beyond a set range;
Further provided with a pressure lamp and a water level lamp driven by the control module,
Arterial blood occlusion blood collection device. According to claim 1,
A temperature maintaining unit for maintaining the temperature of the fluid in the A-line or induction tube at the body temperature of the patient is installed,
Arterial blood occlusion blood collection device. According to claim 9,
The temperature maintaining unit;
A constant temperature jacket surrounding the A-line or induction tube;
A temperature controller for controlling the temperature of the constant temperature jacket;
Including an indicator lamp that turns on when the heating temperature of the constant temperature jacket is in the normal range,
Arterial blood occlusion blood collection device.

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