Arterial blood closed sampling device

Abstract

The present invention relates to a closed arterial blood sampling device, comprising: a physiological saline bag containing physiological saline and having a first port and a second port at the lower end; the pipeline A is connected with an artery blood vessel of the patient and the first port and filled with normal saline in a normal saline bag; the first three-way valve is used for opening and closing the A pipeline in a state of being mounted on the A pipeline; when the first three-way valve blocks the pipeline A, the blood sampling part collects arterial blood through the first three-way valve; the second three-way valve is arranged between the first three-way valve and the first port and is used for opening and closing the pipeline A; the guide tube is connected with the second three-way valve and the second port and filled with normal saline in a normal saline bag; and the fluid conveying device operates when the A pipeline is connected with the guide pipe through the operation of the second three-way valve so as to convey the fluid in the guide pipe.

Description

Technical Field

[0001] The present invention relates to an arterial blood sampling device. More specifically, the device, when collecting arterial blood, extracts initial blood diluted with physiological saline from an arterial line, then collects an amount of blood equivalent to the required amount, and returns the initial blood to the body, thereby minimizing the patient's blood loss burden during each arterial blood collection. Background Art

[0002] An arterial line (A-line) is a device used to monitor a patient's hemodynamic status, such as blood pressure and pulse, and to collect arterial blood. It consists of a catheter inserted into the artery, a tube connected to a saline bag, and a three-way valve attached to the tube. The tube is also connected to a transducer that converts the pulse into an electrical signal. The electrical signal generated by the transducer is transmitted to a monitor, which allows doctors or nurses to determine the patient's condition.

[0003] For patients admitted to the Intensive Care Unit (ICU), who have an arterial line for arterial pressure monitoring, blood is collected through the arterial line during tests such as arterial blood gas analysis, complete blood count, and general chemistry tests.

[0004] Generally, when blood is collected through an arterial line, the initial 5cc of blood is discarded, and then the internal blood is collected. The initial blood is the blood that flows out at the beginning of blood collection, while the internal blood is the blood that flows out after the initial blood is collected. The reason for discarding the initial blood is that, regardless of whether the initial blood is mixed with heparin or not, it will come into contact with saline and be diluted, making it impossible to obtain accurate test results.

[0005] For patients admitted to the intensive care unit, blood is drawn at any time of the day, so anemia is inevitable. Depending on the patient's condition, arterial blood gas analysis may be performed at least once a day, or even as often as once an hour or dozens of times a day. Therefore, the amount of blood collected from critically ill patients each day ranges from about 26 ml to more than 478 ml. In addition, the initial blood is discarded during each examination, so the actual amount of blood lost from the patient is more than this. A report shows that for every 50cc of blood collected, the incidence of severe and above anemia is over 18%, and 97% of hospitalized patients are anemic due to frequent blood draws.

[0006] As a solution to the aforementioned blood collection problem, Edwards Lifesciences' VAMP is well known. VAMP (hereinafter referred to as the "existing product") is a blood collection device that, instead of discarding the initial blood, stores it in an external reservoir. After the internal blood is collected, the initial blood is returned to the body.

[0007] However, these existing products have a drawback: the potential for thrombosis in the initial blood. This is because accumulated blood tends to coagulate quickly. Furthermore, as the initial blood flows into the reservoir, its cross-sectional area significantly expands. Furthermore, when the initial blood stored in the reservoir is returned to the patient, the pressure exerted upon it further increases the likelihood of thrombosis.

[0008] Furthermore, in existing products, the reservoir is placed between the catheter and the transducer, causing damping in the transducer's arterial blood pressure monitoring. It acts as an obstacle, interfering with the pulse signal from the artery to the transducer. Summary of the Invention

[0009] Technical problems to be solved

[0010] The present invention is proposed to solve the above problems, and its purpose is to provide an arterial blood closure blood collection device that will not produce thrombosis and can be used safely, the transducer can perform correct operation, and can be connected to an existing blood collection device for use.

[0011] Solutions to the Problem

[0012] As a means for solving the problems for achieving the above-mentioned object, the present invention provides an arterial blood sealing blood sampling device comprising: a physiological saline bag containing physiological saline and having a first port and a second port at a lower end thereof; a pipe A connecting a patient's arterial blood vessel and the first port and filled with physiological saline from the physiological saline bag; a first three-way valve installed on pipe A to open and close pipe A; a blood sampling unit that collects arterial blood through the first three-way valve when the first three-way valve blocks pipe A; a second three-way valve disposed between the first three-way valve and the first port and opening and closing pipe A; a guide tube connecting the second three-way valve and the second port and filled with physiological saline from the physiological saline bag; and a fluid delivery device that operates when pipe A is connected to the guide tube through the operation of the second three-way valve, thereby delivering fluid in the guide tube to the physiological saline bag.

[0013] In addition, the A-line is installed with a transducer that converts the pulse signal of the patient's artery, which is transmitted using physiological saline as a medium, into an electrical signal and transmits it to an external patient monitor.

[0014] In addition, the A pipeline 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.

[0015] In addition, the fluid delivery device includes a pump, which pressurizes the outer peripheral surface of the guide tube along the length direction of the guide tube, thereby pushing the blood inside the guide tube to move along the length direction of the guide tube.

[0016] Furthermore, a check valve is provided between the pump and the second port, and the check valve prevents the fluid flowing into the guide tube from the proximal tube via the second three-way valve from flowing into the second port.

[0017] Furthermore, a pressure accumulator is provided between the pump and the check valve. When the internal pressure of the guide pipe increases due to the operation of the pump, the pressure accumulator receives the increased pressure and accumulates the pressure.

[0018] Furthermore, the pressure accumulating unit includes an internal pressure cylinder that contains compressible gas and physiological saline solution and displays the water level of the physiological saline solution that changes according to the internal pressure to the outside.

[0019] In addition, the internal pressure cylinder also includes: a pressure sensor, which senses the pressure inside the internal pressure cylinder; a water level sensor, which senses the water level of the physiological saline solution; a control module, which is connected to the pressure sensor and the water level sensor, and outputs a signal when the changes in the pressure and water level inside the internal pressure cylinder reach above the set range; and a pressure lamp and a water level lamp, which are driven by the control module.

[0020] Furthermore, a temperature maintaining unit is provided to maintain the temperature of the fluid in the A-tube or the guide tube at the patient's body temperature.

[0021] In addition, the temperature maintaining part includes: a thermostatic sleeve, which wraps the A pipeline or the guide tube; a temperature controller, which adjusts the temperature of the thermostatic sleeve; and an indicator light, which lights up when the heating temperature of the thermostatic sleeve is within a normal range.

[0022] Effects of the Invention

[0023] The arterial blood sealing blood sampling device of the present invention constructed as described above does not generate thrombus in the initial blood collected and does not leave any residual blood after flushing, so it can be used safely.

[0024] Furthermore, there are no interfering objects between the patient's arterial blood vessels and the transducer to interfere with the pulse signal, enabling accurate monitoring.

[0025] In addition, it can be easily connected to an existing blood collection device for use, thus having excellent utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 FIG. 1 is a diagram showing the structure of an arterial blood sealing blood sampling device according to an embodiment of the present invention.

[0027] Figure 2 It shows Figure 1 A diagram showing the connection relationship between the various parts of the blood collection device.

[0028] Figures 3 to 6 For illustrative purposes Figure 1 A diagram showing how a blood collection device collects blood.

[0029] Figure 7 Is shown separately Figure 1 Diagram of the accumulator chamber shown.

[0030] Figure 8 It shows Figure 7 FIG. 1 is a diagram of a modified example of a pressure accumulation chamber.

[0031] Figure 9 FIG. 1 is a diagram showing a modified example of the arterial blood sealing blood sampling device according to an embodiment of the present invention.

[0032] Figure 10 Is used to illustrate Figure 9 The diagram shows the method of operation of the isothermal jacket. DETAILED DESCRIPTION

[0033] Hereinafter, an embodiment according to the present invention will be described in more detail with reference to the accompanying drawings.

[0034] The arterial blood collection device of the present invention is primarily used in hospital intensive care units to minimize the risk of anemia in patients due to frequent blood sampling. The fundamental principle behind this anemia prevention is that the initial blood (previously discarded) is not discarded during blood collection, but is instead transfused back into the patient. "Initial blood" refers to blood that has been exposed to heparinized saline. Specifically, blood diluted with saline and mixed with heparin is considered initial blood.

[0035] The basic structure of the arterial blood sealing blood sampling device of the present invention includes: a physiological saline bag, which contains physiological saline and has a first port and a second port at its lower end; a pipeline A, which connects the patient's arterial blood vessel and the first port and is filled with physiological saline from the physiological saline bag; a first three-way valve, which opens and closes pipeline A when installed on pipeline A; a blood sampling unit, which collects arterial blood through the first three-way valve when the first three-way valve blocks pipeline A; a second three-way valve, which is disposed between the first three-way valve and the first port and opens and closes pipeline A; a guide tube, which connects the second three-way valve and the second port and is filled with physiological saline from the physiological saline bag; and a fluid conveying device, which operates when pipeline A is connected to the guide tube through the operation of the second three-way valve, thereby conveying fluid in the guide tube to the physiological saline bag.

[0036] Figure 1 Schematically shows the structure of an arterial blood sealing blood sampling device 20 according to an embodiment of the present invention. Figure 2 It shows Figure 1 The structural diagram of the connection relationship of the various parts of the blood collection device shown.

[0037] As shown in the figure, the arterial blood sealing blood collection device 20 according to this embodiment includes a physiological saline bag 21, a pipeline A 23, a first three-way valve 25, a blood collection part, a second three-way valve 28, a guide tube 35, a fluid delivery device, a touch panel 38, a check valve 37 and a pressure accumulation chamber 39.

[0038] The physiological saline bag 21 is a plastic bag containing physiological saline, and has a first port 21b and a second port 21e at its lower end. The interior of the physiological saline bag 21 maintains a pressure of approximately 300 mmHg. In addition, a manual compressor 22 is connected to the physiological saline bag 21 to adjust the internal pressure of the physiological saline bag 21 as needed. The manual compressor 22 is a conventional compression device that the user grasps and handles by hand. In addition, the physiological saline in the physiological saline bag 21 contains heparin. Heparin is pre-injected through port A or port B. The physiological saline bag 21 is the same as a conventional physiological saline bag and is mounted on the upper end of the hanger 17.

[0039] Tube A 23 provides a passageway connecting the patient's artery 14 to first port 21b. Tube A 23 is filled with saline from a saline bag. The pressure of the saline and the pressure within the saline bag 21 are transmitted to the lower end of tube A 23, i.e., the distal end of catheter 23c.

[0040] The A-line 23 includes a catheter 23c, a proximal tube 23a, and a distal tube 23b. The catheter 23c is a tube with a blood collection needle 23d at one end and the other end connected to the first three-way valve 25. When the blood collection needle 23d punctures the artery 14, arterial blood flows through the blood collection needle 23d into the catheter 23c.

[0041] The proximal tube 23a connects the first three-way valve 25 and the second three-way valve 28. The distal tube 23b is a flexible tube that connects the second three-way valve and the first port 21b. The proximal tube 23a is connected to the catheter 23c through the first three-way valve 25, and the distal tube 23b is connected to the proximal tube 23a through the second three-way valve 28.

[0042] The saline in the saline bag 21 can reach the artery 14 through the first port 21b, the distal tube 23b, the second three-way valve 28, the proximal tube 23a, the first three-way valve 25 and the catheter 23c. The lengths of the proximal tube 23a and the distal tube 23b can be changed as needed.

[0043] The first three-way valve 25 is a three-way valve that opens and closes the channel of pipeline A when installed on pipeline A. When pipeline A is opened, saline or blood can flow inside pipeline A, and when pipeline A is blocked, the flow path of saline or blood is blocked.

[0044] like Figure 1 As shown in the enlarged view in the middle, the first three-way valve 25 has a catheter fixing port 25b, a tube connecting port 25c, a blood sampling port 25e and a switching lever 25a.

[0045] The catheter fixing port 25b is a hole for fixing the end of the catheter 23c, and the tube connection port 25c is a channel for connecting one end of the proximal tube 23a. In addition, the blood collection port 25e is a channel for collecting blood from the catheter 23c. The blood collection part, that is, the blood collection syringe ( Figure 5 41) can be connected to the blood sampling port 25e for blood sampling.

[0046] The blood collection unit collects arterial blood through the blood collection port 25e of the first three-way valve when the first three-way valve 25 blocks the A pipeline 23. The blood collection unit includes a blood collection syringe 41. The doctor or nurse rotates the switching lever 25a and then connects the blood collection syringe 41 to the blood collection port 25e to collect blood.

[0047] The switching lever 25a is a manual lever that switches the flow path within the first three-way valve 25. As described above, by rotating the switching lever 25a, the catheter 23c and the proximal tube 23a can be connected while the blood sampling port 25e is blocked, or the catheter 23c and the proximal tube 23a can be blocked while the catheter 23c and the blood sampling port 25e are connected.

[0048] The second three-way valve 28 also has the same structure as the first three-way valve 25. The second three-way valve 28 includes a first port 28b, a second port 28c, a third port 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.

[0049] The switching rod 28a switches the internal passage of the second three-way valve 28 and blocks the guide tube 35 while connecting the proximal tube 23a and the distal tube 23b, or blocks the distal tube 23b while connecting the proximal tube 23a and the guide tube 35. The second three-way valve 28 may have a single body with the transducer 27. However, the second three-way valve 28 may also be provided separately from the transducer 27.

[0050] The transducer 27 receives the pulse signal of the patient's artery transmitted through the medium of physiological saline, 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 conventional, its description is omitted.

[0051] On the one hand, the guide tube 35 is a flexible tube, one end of which is connected to the third port 28d of the second three-way valve 28 and the other end is connected to the second port 21e of the saline bag 21. The channel of the guide tube 35 is filled with saline from the saline bag. The length of the guide tube 35 can be arbitrarily changed as needed.

[0052] The guide tube 35 is a single, integral tube. For ease of description, it can be divided into a first guide tube portion 35a and a second guide tube portion 35b, based on the pump 33. The first guide tube portion 35a connects the second three-way valve 28 and the pump 33, while the second guide tube portion 35b connects the pump 33 and the second port 21e. The lengths of the first and second guide tube portions 35a, 35b can also vary.

[0053] The guide pipe 35 is provided with a pump 33 , a check valve 37 and a pressure accumulation chamber 39 .

[0054] The pump 33 is operated by the second three-way valve 28 when the proximal tube 23a and the guide tube 35 are connected, and is a fluid delivery device that delivers fluid (physiological saline, initial blood) in the direction of arrow a.

[0055] Pump 33 is a peristaltic pump that compresses the outer circumference of guide tube 35 along its length, thereby pushing the fluid inside the guide tube along its length. This pump 33 comprises a housing 33b providing a support circumferential surface 33c with a certain curvature; a rotor 33e housed within the housing 33b and capable of bidirectional rotation; a motor (not shown) that rotates rotor 33e; and a plurality of pressure rollers 33f fixed to the radial ends of rotor 33e.

[0056] The guide tube 35 is supported by the supporting circumferential surface 33c within the housing and is compressed by the pressure roller 33f. The pressure roller 33f rotates while pressing against the guide tube 35, thereby conveying the fluid within the guide tube 35. Reference numeral 33a denotes an operation button. Operation button 33a is used to turn the pump 33 on and off or to switch the rotational direction of the rotor 33e.

[0057] The touch panel 38 controls the operation of the pump 33 in more detail and displays the pumping volume and pumping time, the internal pressure of the second guide tube portion 35b, etc. The doctor or nurse can visually confirm the operating status of the blood collection device 20 through the touch panel 38.

[0058] In addition, the operating time of the pump 33 or the speed or number of revolutions of the rotor can be pre-input through the touch panel 38. Further, when the first three-way valve 25 and the second three-way valve 28 are implemented in an electronic control manner, the first three-way valve 25 and the second three-way valve 28 can be operated through the touch panel 38.

[0059] On the one hand, a check valve 37 is provided between the second port 21e and the pressure accumulating chamber 39. When the fluid in the guide tube 35 moves in the direction of arrow a, the check valve 37 prevents the compressed air in the pressure accumulating chamber 39 from seeping into the saline bag 21. The saline in the saline bag 21 can flow downward into the guide tube 35 through the check valve 37.

[0060] The pressure accumulator is a sealed container that accumulates the pressure of the fluid flowing into it through the operation of the pump 33. When the pump 33 is reversed and the fluid in the guide tube 35 moves in the direction of arrow c, the pressure accumulated in the pressure accumulator 39 acts to push the fluid.

[0061] Figure 7 The structure of the pressure accumulation chamber 39 is shown.

[0062] like Figure 7 As shown, the pressure accumulator chamber 39 comprises an internal pressure cylinder 39a, an upper cover 39b, and a lower cover 39d. The internal pressure cylinder 39a is a cylindrical transparent member with openings at the top and bottom and a scale portion 39s on the outer circumference. The internal pressure cylinder 39a can be made of acrylic or glass.

[0063] The upper cover 39b and lower cover 39d serve as plugs for the upper and lower ends of the internal pressure cylinder 39a and have connection ports 39c and 39e, respectively. Connection ports 39c and 39e are connected to the second guide tube portion 35b. The saline solution flowing from the saline bag 21 is injected into the internal pressure cylinder 39a through the upper cover 39b. Furthermore, the saline solution within the pressure accumulation chamber 39 is discharged downward through the connection port 39e.

[0064] The pressure accumulator chamber 39 contains a compressible gas and saline solution. The compressible gas can be air. A check valve 37 is provided above the pressure accumulator chamber 39, so that the air is trapped in the space above the check valve 37 and the liquid level of the saline solution S.

[0065] When the fluid inside the guide tube 35 is pumped along the Figure 7 When the pump 33 is pushed in the direction of arrow e, that is, when the water level of the saline solution S rises, the air is compressed. When the pump 33 is reversed, the compressed air expands and transmits the expansion force to the fluid. That is, when the fluid inside the guide tube 35 flows along the Figure 6 When it moves in the direction of arrow c, it pushes the fluid, causing it to move faster.

[0066] The water level of the physiological saline solution in the pressure accumulator chamber 39 can be visually confirmed by the scale portion 39s. When the water level of the physiological saline solution rises by 20 ml, the fluid flowing into the pressure accumulator chamber 39 is 20 ml, which means that 20 ml of blood has been collected from the patient's artery.

[0067] The working process of the blood collection device 20 of this embodiment having the above-mentioned structure is as follows.

[0068] Figures 3 to 6 For illustrative purposes Figure 1 FIG. 2 is a diagram showing a method of collecting blood from inside an artery using the blood collection device 20.

[0069] Figure 3 The A-channel 23 is shown in a fully open state. That is, the catheter 23c is connected to the proximal tube 23a, and the proximal tube 23a is connected to the distal tube 23b. At this time, the interior of the A-channel 23 is filled with physiological saline containing heparin.

[0070] Furthermore, the pressure within tube A 23 and the arterial blood vessel pressure are identically adjusted to atmospheric pressure through a separate zeroing process. The heartbeat is transmitted to transducer 27 using arterial blood and saline solution within proximal tube 23a as media. Transducer 27 converts the pulsation signal into an electrical signal and transmits it to patient monitor 31.

[0071] In order to draw blood in the above state, the second three-way valve 28 is switched to connect the proximal tube 23a and the guide tube 35, and the pump 33 is operated at the same time so that the physiological saline filled in the proximal tube 23a and the guide tube 35 flows along the Figure 2Move in the direction of arrow a.

[0072] As the saline solution is delivered in the direction indicated by arrow a, blood within artery 14 flows out of the artery, moves along with the saline solution, and passes through first three-way valve 25. The flow rate of fluid moving in the direction indicated by arrow a is measured using scale 39s of pressure accumulator chamber 39. The scale allows estimation of the amount of blood withdrawn.

[0073] By executing the above process, the initial blood Z1 and the internal blood Z2 are guided into the interior of the proximal tube 23a and the guide tube 35. Since the internal volume per unit length of the proximal tube 23a and the guide tube 35 is fixed, the position of the boundary between the initial blood Z1 and the internal blood can be easily adjusted by controlling the pump, as long as the initial blood volume is determined to be a few milliliters. The boundary between the initial blood Z1 and the internal blood Z2 can be located between the first three-way valve 25 and the second three-way valve 28. Furthermore, the boundary between the initial blood Z1 and the saline solution S can be located between the second three-way valve 28 and the pump 33.

[0074] When the internal blood Z2 passes through the first three-way valve 25 after the above process, the switching lever 25a of the first three-way valve 25 is rotated to open the blood sampling port 25e, and the blood sampling syringe 41 is inserted into the blood sampling port 25e to collect the internal blood.

[0075] When the internal blood is collected, the first three-way valve 25 is reopened, and the rotary pump 33 is reversed. As the pump rotates in reverse, the remaining internal blood, the initial blood, and the saline solution move in the direction of arrow c and are returned to the artery 14. At this point, the compressed air in the pressure accumulator chamber 39 expands and pushes the saline solution.

[0076] When the internal blood and the initial blood flow back into the arterial blood vessel 14, the second three-way valve 28 is operated to connect the proximal tube 23a and the distal tube 23b, blocking the guide tube 35, and completing the blood collection process.

[0077] Figure 8 It shows Figure 7 FIG. 39 is a diagram showing a modified example of the pressure accumulation chamber 39.

[0078] The same reference numerals as those in the above reference numerals refer to the same components having the same functions.

[0079] Figure 8 The pressure accumulator chamber 39 shown has a pressure sensor 39g and a water level sensor 39f inside the internal pressure cylinder 39a. The pressure sensor 39g is a sensor for sensing the internal pressure change of the internal pressure cylinder 39a, and the water level sensor 39f is a sensor for sensing the water level change of the physiological saline solution S. As described above, when the fluid is driven by the pump 33, the fluid flows along the inner pressure cylinder 39a. Figure 2When the container moves in the direction of arrow a, the water level of the saline solution rises and the internal pressure increases. These sensors sense the water level and pressure changes at this time.

[0080] Information sensed by pressure sensor 39g and water level sensor 39f is transmitted to control module 39h. When the pressure and water level inside pressure accumulator chamber 39 exceed a set range, control module 39h illuminates pressure light 39m and water level light 39k. These lights are LEDs. Doctors or nurses using blood collection device 20 can instantly understand the internal status of pressure accumulator chamber 39 by observing pressure light 39m and water level light 39k, without having to check scale 39s.

[0081] Figure 9 FIG. 4 is a diagram showing an example of a thermostatic sleeve 47 being applied to an arterial blood sealing blood sampling device 20 according to an embodiment of the present invention. Figure 10 Is used to illustrate Figure 9 The diagram shows the method of operation of the isothermal jacket.

[0082] Referring to the drawings, it can be seen that the thermostatic sleeve 47 encases the proximal tube 23a and the guide tube 35. The thermostatic sleeve 47 is used to maintain the temperature of the fluid retained in the proximal tube 23a and the guide tube 35 at the patient's body temperature, and together with the temperature controller 51 and the indicator light 53, constitutes a temperature maintaining unit.

[0083] like Figure 10 As shown, the thermostatic jacket 47 has a built-in heating wire 47 a. The heating wire 47 a generates heat by electricity supplied from a temperature controller 51 and maintains the thermostatic jacket 47 at a set temperature. The temperature controller 51 controls the temperature of the thermostatic jacket 47.

[0084] In addition, the indicator light 53 is an LED that illuminates when the temperature of the thermostatic jacket 47 is within the normal range. This indicator light 53 allows visual confirmation of whether the temperature of the fluid within the second guide tube 35b is maintained at the patient's body temperature. As described above, the use of a temperature-maintaining unit can minimize the occurrence of thrombosis. The temperature of the thermostatic jacket 47 can be set above or below body temperature as needed. Furthermore, the location of the thermostatic jacket 47 can be freely adjusted.

[0085] Although the present invention has been described in detail above through specific embodiments, the present invention is not limited to the above embodiments, and those skilled in the art can make various modifications within the scope of the technical concept of the present invention.

Claims

1. An arterial blood sealing blood sampling device, in, include: a physiological saline bag containing physiological saline and having a first port and a second port at a lower end thereof; A pipeline, wherein the A pipeline is connected to the patient's arterial blood vessel and the first port and is filled with normal saline in a normal saline bag; a first three-way valve, which opens and closes pipeline A when installed on pipeline A; a blood sampling unit, which collects arterial blood through the first three-way valve when the first three-way valve blocks the A pipeline; a second three-way valve, which is disposed between the first three-way valve and the first port and opens and closes pipeline A; a guide tube connected to the second three-way valve and the second port and filled with saline in a saline bag; and A fluid delivery device, which operates when the A pipeline is connected to the guide tube through the operation of the second three-way valve, thereby delivering the fluid in the guide tube to the side of the physiological saline bag, Pipeline A includes: a catheter having a blood collection needle and connected to a first three-way valve; a proximal tube, the 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 case of bypassing the guide tube through the second three-way valve, the A pipeline directly connects the physiological saline bag to the arterial blood vessel, contains the physiological saline in the physiological saline bag, and transmits the patient's arterial pulse signal through the physiological saline. The transducer is installed to convert the patient's arterial pulse signal transmitted through the physiological saline as a medium into an electrical signal and transmit it to an external patient monitor. The blood collection unit closes the distal tube between the first port and the guide tube through the first three-way valve, and connects the proximal tube and the guide tube through the second three-way valve. While allowing the arterial blood to move from the artery to the guide tube along with the saline solution, the patient's arterial blood is collected from the proximal tube. The fluid delivery device includes a pump. When the distal tube between the first port and the guide tube is closed by a first three-way valve and the proximal tube and the guide tube are connected by a second three-way valve, the pump applies pressure to the outer peripheral surface of the guide tube along the length of the guide tube, thereby pushing the blood inside the guide tube to move along the length of the guide tube, so that the boundary line between the initial blood and the internal blood is located between the first three-way valve and the second three-way valve, and the boundary line between the initial blood and the normal saline is located between the second three-way valve and the fluid delivery device.

2. The arterial blood sealing blood sampling device according to claim 1, wherein: A check valve is provided between the pump and the second port, and prevents the fluid flowing from the proximal tube into the guide tube via the second three-way valve from flowing into the second port.

3. The arterial blood sealing blood sampling device according to claim 2, wherein: A pressure accumulator is provided between the pump and the check valve. When the internal pressure of the guide pipe increases due to the operation of the pump, the pressure accumulator receives the increased pressure and accumulates the pressure.

4. The arterial blood sealing blood sampling device according to claim 3, wherein: The pressure accumulator has: An internal pressure cylinder contains compressible gas and saline solution and displays the water level of the saline solution according to the internal pressure change to the outside.

5. The arterial blood sealing blood sampling device according to claim 4, wherein: The internal pressure cylinder also includes: A pressure sensor, wherein the pressure sensor senses the pressure inside the internal pressure cylinder; a water level sensor, wherein the water level sensor senses the water level of the physiological saline solution; A control module connected to the pressure sensor and the water level sensor, and outputting a signal when changes in the pressure and water level inside the internal pressure cylinder exceed a set range; and A pressure lamp and a water level lamp are driven by the control module.

6. The arterial blood sealing blood sampling device according to claim 1, wherein: A temperature maintaining unit is provided to maintain the temperature of the fluid in the A-line or the guide tube at the patient's body temperature.

7. The arterial blood sealing blood sampling device according to claim 6, wherein: The temperature maintaining unit includes: A constant temperature sleeve, the constant temperature sleeve wraps the A pipeline or the guide tube; a temperature controller that adjusts the temperature of the thermostatic jacket; and The indicator light is on when the heating temperature of the thermostatic sleeve is within a normal range.

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