A positioning device and method for a pressure transducer in right heart catheterization

Abstract

The present invention discloses a positioning device and method for a right heart catheterization pressure measurement transducer, belonging to the inspection and pressure measurement of right heart catheters in the technical field of electrocardiogram detection. The purpose is to solve the technical problems of cumbersome positioning and low positioning accuracy existing in the zero-point positioning of existing transducers. It includes: a bed surface, a mounting frame, a lifting lead screw, an RFID reader, a lower RFID tag, and an upper RFID tag; the RFID reader emits radio frequency signals, and the lower RFID tag and the upper RFID tag are activated and return response signals after receiving the signals; the RFID reader receives the response signals and calculates the distances between the lower RFID tag and the RFID reader, and between the upper RFID tag and the RFID reader respectively according to the time from sending the radio frequency signal to receiving the response signal, and calculates and determines the position of the fixing frame based on the distances between the RFID reader, the lower RFID tag, and the upper RFID tag pairwise. The entire positioning process only requires placing the RFID reader, greatly simplifying the procedure for zero-point positioning of the transducer, making the positioning process more convenient and with high positioning accuracy.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrocardiogram detection, and relates to the inspection and pressure measurement of a right heart catheter, in particular to a positioning device and method for a right heart catheter inspection and pressure measurement transducer. Background Art

[0002] Right heart catheter inspection and pressure measurement is an invasive inspection method, mainly used to measure the pressures of various parts of the right heart system to evaluate cardiac function and diagnose cardiovascular diseases. In order to accurately measure the pressures of the right atrium, right ventricle, pulmonary artery and its branches, understand the pressure relationships between the chambers and blood vessels of the heart, and determine whether there are abnormally increased or decreased pressures, a transducer is usually used for pressure measurement. A transducer is a key device that converts a pressure signal into an electrical signal for pressure measurement.

[0003] Before using a transducer for pressure measurement, transducer positioning is required, that is, determining the transducer zero point. The transducer zero point, that is, the horizontal reference point of the heart; for the transducer zero point, the well-known reference level is the midpoint of the right atrium, that is, the position corresponding to the level of the fourth intercostal space at the midaxillary line in the supine position. In medical practice, medical staff will first place the patient supine on the bed, find the patient's fourth rib, find the intersection of the fourth rib and the midaxillary line, translate this intersection to the mounting rack (such as an infusion rack) on one side of the bed and install the transducer at this position, and then connect the right heart catheter to the transducer through a three-way valve and other devices. When the patient's body position changes during the detection or treatment process, the transducer zero point positioning needs to be performed again.

[0004] There is a problem of low positioning accuracy in determining the transducer zero point position by medical staff based on the position of the fourth rib by naked eyes and experience. For this reason, the invention patent application with the application number 202310417946.7 discloses a CVP transducer positioning method, system and electronic device based on triangular positioning. It determines a triangular plane through the position sensors of three electrode plate structures, can determine the heart horizontal position through a certain algorithm, and quickly adjusts the transducer mounting plate on the infusion rack according to this horizontal position to make the transducer zero point consistent with the heart horizontal position. It can quickly and accurately keep the transducer zero point and the heart horizontal at the same level, reduce the workload of calibrating the transducer zero point after changing the body position clinically; reduce the pipelines on the bed, making the bed unit clean and orderly; and can more accurately reflect the true values of the patient.

[0005] Although the above-mentioned invention patent application can achieve the positioning of the transducer zero point and make the transducer zero point coincide with the horizontal position of the heart. However, this method requires deploying position sensors at the intersection of the bilateral midaxillary line and the fourth intercostal space on both sides of the body position and on the body surface directly above the heart at the same time, which greatly increases the workload of medical staff and makes the positioning of the transducer more cumbersome; the installation positions of the position sensors are mainly determined by medical staff based on experience, and the positioning accuracy of the transducer is relatively low. Summary of the Invention

[0006] The purpose of the present invention is to provide a positioning device and method for a right heart catheterization pressure measurement transducer in order to solve the technical problems of cumbersome positioning and low positioning accuracy existing in the existing transducer zero point positioning.

[0007] The present invention specifically adopts the following technical solutions to achieve the above purpose:

[0008] A positioning device for a right heart catheterization pressure measurement transducer includes a bed surface and a mounting rack arranged on the bed surface; it also includes an RFID reader placed on the patient, and lower RFID tags and upper RFID tags respectively installed at the bottom and top of the mounting rack; a lifting lead screw is sleeved inside the mounting rack, and a fixed frame that can move axially along the mounting rack is sleeved on the lifting lead screw.

[0009] The RFID reader emits a radio frequency signal. After receiving the radio frequency signal, the lower RFID tag and the upper RFID tag are activated and return a response signal containing their own coding information; the RFID reader respectively receives the response signals returned by the lower RFID tag and the upper RFID tag, and calculates the distances between the lower RFID tag and the RFID reader, and between the upper RFID tag and the RFID reader according to the time from emitting the radio frequency signal to receiving the response signal, and calculates and determines the position of the fixed frame according to the distances between the lower RFID tag and the RFID reader, between the upper RFID tag and the RFID reader, and between the lower RFID tag and the upper RFID tag.

[0010] Further, an internal connection hole is provided inside the mounting rack, and the lifting lead screw is sleeved inside the mounting rack through the internal connection hole.

[0011] An L-shaped connecting piece is provided on the back of the fixed frame. A threaded through hole is provided at the threaded connection end of the L-shaped connecting piece. The L-shaped connecting piece is sleeved on the lifting lead screw through the threaded through hole and is threadedly connected to the lifting lead screw.

[0012] Further, a receiving hole coaxial with the internal connection hole is provided inside the mounting rack. An installation groove is provided on the mounting rack along the axial direction of the mounting rack. The installation groove communicates with the receiving hole. The threaded connection end of the L-shaped connecting piece extends into the receiving hole through the installation groove. The lifting lead screw passes through the internal connection hole and the threaded through hole and is threadedly connected to the L-shaped connecting piece through the threaded through hole.

[0013] Further, the fixing frame includes a fixing substrate connected to the mounting frame. Connecting plates are provided on both sides of the fixing substrate. Back plates are provided on the opposite sides of the other ends of the two connecting plates, and a U-shaped area for clamping the transducer is formed at both ends of the fixing substrate; a support plate is provided in the middle of the inner bottom of the two connecting plates, and a clamping area for placing the side of the transducer is formed between the support plate and the fixing substrate.

[0014] Further, a moving chute is provided in the fixing substrate, and the connecting end of the connecting plate extends into the moving chute; a clamping screw rod is sleeved in the fixing substrate along the length direction of the fixing substrate. The thread directions at both ends of the clamping screw rod are opposite, and both ends of the clamping screw rod are threadedly connected to the connecting ends of the two connecting plates respectively.

[0015] A positioning method for a right heart catheterization pressure measurement transducer includes the above-mentioned right heart catheterization pressure measurement transducer positioning device; when using the right heart catheterization pressure measurement transducer positioning device for positioning, the specific steps are as follows:

[0016] Step 1, place the RFID reader at the position of the fourth rib of the patient in the supine position;

[0017] Step 2, turn on the RFID reader and emit a radio frequency signal, and record the time t1; the lower RFID tag and the upper RFID tag receive the radio frequency signal and are activated. The lower RFID tag and the upper RFID tag emit response signals containing their own coding information; the RFID reader receives the response signals of the lower RFID tag and the upper RFID tag respectively, and records the times t2 and t3;

[0018] Step 3, calculate the distance L2 between the RFID reader and the lower RFID tag according to the times t1 and t2, and calculate the distance L1 between the RFID reader and the upper RFID tag according to the times t1 and t3;

[0019] Step 4, calculate the height of the projection point D of the RFID reader on the mounting frame :

[0020] ;

[0021] ;

[0022] wherein, represents the distance between the lower RFID tag and the upper RFID tag, represents the distance between the projection point D and the upper RFID tag;

[0023] Step 5, move the fixing frame so that the height of the fixing frame above the bed surface is half of the height That is, the height of the transducer above the bed surface is also half of the height Half.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1. In the present invention, by installing two RFID tags on the mounting frame, placing the RFID reader at the position of the fourth rib of the patient in the supine position, calculating the distance between the RFID tags and the RFID reader, and combining the distance between the two RFID tags, the height information of the RFID reader in the vertical direction can be calculated, so as to adjust the position of the fixing frame and the transducer thereon. The whole positioning process only requires placing the RFID reader, greatly simplifying the procedure of transducer zero-point positioning, and the positioning process is more convenient; during the whole positioning process, medical staff only need to touch the fourth rib of the patient to determine the installation position of the RFID reader, and the error introduced in the whole process is small, which can greatly improve the positioning accuracy of the transducer zero point.

[0026] 2. In the present invention, by rotating the lifting lead screw, the lifting of the fixing frame and the transducer installed thereon can be driven. The position of the fixing frame and the transducer installed thereon can be accurately controlled by accurately controlling the rotation angle of the lifting lead screw during the whole process, improving the positioning accuracy of the transducer zero point.

[0027] 3. In the present invention, the fixing frame adopts a two-sided concave structure composed of a fixing substrate, a connecting plate and a back plate, which is used to clamp the side of the transducer, and a support plate is arranged at the bottom to support the whole transducer body, so that the transducer can be conveniently and quickly installed on the fixing frame, and it is convenient and quick to take and place, and it is not easy to fall off. Brief Description of the Drawings

[0028] Figure 1 is a schematic structural diagram of the present invention;

[0029] Figure 2 is a schematic structural diagram of the present invention;

[0030] Figure 3 is a schematic diagram of the positions of the RFID tags and the RFID reader in the present invention;

[0031] Figure 4 is a schematic structural diagram of the mounting frame in the present invention;

[0032] Figure 5 is a schematic connection diagram of the fixing frame and the L-shaped connecting piece in the present invention;

[0033] Figure 6 is a schematic structural diagram of the fixing frame in the present invention;

[0034] Figure 7 is a schematic structural diagram after the two connecting plates move towards each other by a certain distance in the present invention;

[0035] Figure 8 It is a schematic structural diagram of the transducer and the fixing bracket in the present invention;

[0036] Figure 9 It is a schematic diagram of the positioning principle in the present invention;

[0037] Among them, the reference numerals are:

[0038] 1 - Bed surface, 2 - Patient, 3 - RFID reader, 4 - Lower RFID tag, 5 - Mounting bracket, 6 - Upper RFID tag, 7 - Lifting screw rod, 8 - Lifting handle, 9 - Fixing bracket, 10 - Inner connection hole, 11 - L-shaped connecting piece, 12 - Transducer, 13 - Threaded through hole, 14 - Mounting groove, 15 - Accommodating hole, 91 - Fixed substrate, 92 - Clamping area, 93 - Clamping handle, 94 - Clamping screw rod, 95 - Back plate, 96 - Connecting plate, 97 - Support plate, 98 - Moving chute, 121 - Interface, 122 - Panel, 123 - Transducer body, 124 - Side. Detailed implementation manners

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention.

[0040] Therefore, based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] Embodiment 1

[0042] This embodiment provides a positioning device for a right heart catheterization pressure measurement transducer, which is used to accurately position the zero point of the transducer and install the transducer on one side of the bed surface. It includes a bed surface 1, a mounting bracket 5, a lower RFID tag 4, an upper RFID tag 6, a lifting screw rod 7, and a fixing bracket 9, and the overall structure is as Figure 1-2 shown.

[0043] The bed surface can be a hospital bed, an operating table, or the bed surface of other detection and diagnosis beds, and it is mainly used for the patient 2 to lie on his back during right heart catheterization pressure measurement.

[0044] A mounting bracket 5 arranged in the vertical direction is installed on the side of the bed surface 1 close to the head. The mounting bracket 5 is installed on the bed surface 1 by using a quick-release structure (which can adopt the existing technology), and it is mainly used to install some detection devices and can also be used as an infusion stand at the same time.

[0045] As Figure 3As shown in the figure, it further includes an RFID reader 3 for distance detection during the transducer positioning process, a lower RFID tag 4, and an upper RFID tag 6. Among them, the RFID reader 3 is placed at the position of the fourth rib on the abdomen of the supine patient 2 during detection and positioning; the lower RFID tag 4 and the upper RFID tag 6 are respectively installed at the bottom and top of the mounting bracket 5. After the tags are installed, the distance L3 between the lower RFID tag 4 and the upper RFID tag 6 can be measured. And the detection point of the lower RFID tag 4 is flush with the top surface of the bed surface 1, that is, the transducer zero point. And the upper RFID tag 6 is set at the top, so that during positioning, the top position of the fourth rib of most patients (that is, the position for placing the RFID reader 3) is located between the lower RFID tag 4 and the upper RFID tag 6 for subsequent calculation.

[0046] An inner connection hole 10 extending inward along its axis is provided at the top of the mounting bracket 5. A lifting screw rod 7 is arranged along the axial direction of the inner connection hole 10 in the inner connection hole 10, and the end of the lifting screw rod 7 extends out of the mounting bracket 5. For driving the lifting screw rod 7, a lifting handle 8 can be provided at the top of the lifting screw rod 7, and the lifting screw rod 7 is driven to rotate coaxially by rotating the lifting handle 8; alternatively, a servo motor and a transmission mechanism (such as a gear set) can be provided, and the lifting screw rod 7 is rotated by precisely controlling the rotation angle of the servo motor to move the fixing bracket 9 to a specified position (the servo motor and the transmission mechanism can directly apply the existing technology).

[0047] A fixing bracket 9 for fixing the transducer 12 is provided on the mounting bracket 5. The fixing bracket 9 passes through the slot on the mounting bracket 5 and extends into the mounting bracket 5 and is threadedly connected with the lifting screw rod 7. By rotating the lifting screw rod 7, the fixing bracket 9 can be driven to move axially on the mounting bracket 5, thereby adjusting the height of the transducer 12.

[0048] As Figure 8 shown, the transducer 12 includes a transducer body 123. A detachable panel 122 is provided in the groove on the front surface of the transducer body 123. The relevant devices in the transducer body 123 can be conveniently and quickly replaced through the detachable panel 122. Side edges 124 bulge outwards on both sides of the transducer body 123. Interfaces 121 for connecting corresponding pipes are provided at the upper and lower positions on the back surface of the transducer body 123.

[0049] When performing zero-point positioning of the transducer, the RFID reader 3 emits a radio frequency signal. After receiving the radio frequency signal, the lower RFID tag 4 and the upper RFID tag 6 are respectively activated and return response signals containing their own coding information. The RFID reader 3 respectively receives the response signals returned by the lower RFID tag 4 and the upper RFID tag 6, and respectively calculates the distance L2 between the lower RFID tag 4 and the RFID reader 3 and the distance L1 between the upper RFID tag 6 and the RFID reader 3 based on the time from emitting the radio frequency signal to receiving the response signal. Then, calculations are performed based on the distance L2 between the lower RFID tag 4 and the RFID reader 3, the distance L1 between the upper RFID tag 6 and the RFID reader 3, and the distance L3 between the lower RFID tag 4 and the upper RFID tag 6, and the position of the fixing bracket 9 is determined, so as to rotate the lifting screw rod 7 to adjust the fixing bracket 9 to the corresponding position.

[0050] Embodiment 2

[0051] On the basis of Embodiment 1, as Figure 4-5 shown, an L-shaped connecting piece 11 is fixedly connected to the back of the fixing bracket 9. A threaded through hole 13 is provided at the end (i.e., the threaded connection end) of the L-shaped connecting piece 11, and the threaded through hole 13 is coaxial with the inner connection hole 10. The lifting screw rod 7 passes through the inner connection hole 10 and the threaded through hole 13 in sequence and is threadedly connected to the L-shaped connecting piece 11 through the threaded through hole 13.

[0052] Preferably, a receiving hole 15 is provided in the mounting bracket 5. The receiving hole 15 is provided between the lower RFID tag 4 and the upper RFID tag 6. The receiving hole 15 is coaxially arranged with the inner connection hole 10, and the diameter of the receiving hole 15 is larger than the diameter of the inner connection hole 10. An installation groove 14 is provided in the mounting bracket 5. The installation groove 14 is provided corresponding to the position of the receiving hole 15, and the installation groove 14 communicates with the receiving hole 15. The threaded connection end of the L-shaped connecting piece 11 extends into the installation groove 14 and the receiving hole 15 in sequence and is threadedly connected to the lifting screw rod 7 in the receiving hole 15. When the lifting screw rod 7 is rotated, it will drive the L-shaped connecting piece 11 to move axially up and down along the mounting bracket 5 (a part of the L-shaped connecting piece 11 is in the receiving hole 15, a part is in the installation groove 14, and another part is in the mounting bracket 5), which is convenient for adjusting the position of the fixing bracket 9 and the transducer 12 thereon.

[0053] Embodiment 3

[0054] On the basis of the above embodiments, as Figure 6-8As shown in the figure, the fixing bracket 9 includes a fixing substrate 91, and the back surface of the fixing substrate 91 is fixedly connected to the L-shaped connecting member 11. On both sides of the front surface of the fixing substrate 91, connecting plates 96 are provided, and the distance between the two connecting plates 96 is adapted to the width of the transducer 12. On the opposite side (i.e., the inner side, the side close to the other connecting plate 96) of each end of each connecting plate 96, a back plate 95 is provided, and a U-shaped area for clamping the transducer 12 is formed at both ends of the fixing substrate 91, which is composed of the fixing substrate 91, the connecting plate 96 and the back plate 95.

[0055] In the middle position at the bottom of the inner side of each connecting plate 96, a support plate 97 is provided. The width of the support plate 97 is smaller than the distance between the fixing substrate 91 and the back plate 95, so that a clamping area 92 for placing the side 124 of the transducer 12 is formed between the support plate 97 and the fixing substrate 91.

[0056] Preferably, a moving chute 98 is further opened inward on the front surface of the fixing substrate 91. A convex seat protruding outward is provided at the connecting end of the connecting plate 96. The convex seat of the connecting plate 96 extends into the moving chute 98 and can move along the length direction of the moving chute 98 in the moving chute 98. A clamping screw rod 94 is sleeved inside the fixing substrate 91, and the clamping screw rod 94 is arranged along the length direction of the fixing substrate 91. The thread directions at both ends of the clamping screw rod 94 are opposite, and the two ends of the clamping screw rod 94 are respectively threadedly connected to the convex seats of the connecting plates 96 on both sides. By rotating the clamping screw rod 94, the connecting plates 96 on both sides can be driven to move towards or away from each other. For the drive of the clamping screw rod 94, a clamping handle 93 can be provided at the end of the clamping screw rod 94, and the clamping screw rod 94 can be driven to rotate coaxially by rotating the clamping handle 93; alternatively, a servo motor and a transmission mechanism (such as a gear set) can be provided, and the clamping screw rod 94 can be rotated by accurately controlling the rotation angle of the servo motor, so that the connecting plate 96 moves to a specified position (the servo motor and the transmission mechanism can directly apply the existing technology).

[0057] Embodiment 4

[0058] A positioning method for a right heart catheterization inspection pressure transducer includes the right heart catheterization inspection pressure transducer positioning device described in any of the foregoing embodiments; when using the right heart catheterization inspection pressure transducer positioning device for transducer zero-point positioning, as Figure 9 shown, the specific steps are as follows:

[0059] Step 1, place the RFID reader 3 at the position of the fourth rib of the patient in the supine position;

[0060] Step 2: Turn on the RFID reader 3 and emit a radio frequency signal, and record the time t1; the lower RFID tag 4 and the upper RFID tag 6 receive the radio frequency signal and are respectively activated, and the lower RFID tag 4 and the upper RFID tag 6 emit response signals containing their own coding information; the RFID reader 3 respectively receives the response signals of the lower RFID tag 4 and the upper RFID tag 6, and records the times t2 and t3 (it is prior art that the reader emits a radio frequency signal, and the tag receives the signal, is activated, and emits a response signal containing coding information, and those skilled in the art can directly apply it).

[0061] Step 3: Calculate the distance L2 between the RFID reader 3 and the lower RFID tag 4 according to the times t1 and t2, and calculate the distance L1 between the RFID reader 3 and the upper RFID tag 6 according to the times t1 and t3 (when calculating the distance, those skilled in the art do not need to make creative efforts, and the distance can be obtained according to the propagation speed of electromagnetic waves * the signal propagation time (i.e., half of the time difference in Step 2)).

[0062] Step 4: Calculate the height of the projection point D of the RFID reader 3 on the mounting bracket 5 ; The specific calculation process is as follows:

[0063] In Figure 9 In the shown △ABC, the distances L1, L2, and L3 are known, so according to the cosine theorem formula, it can be obtained that (because):

[0064] ;

[0065] In the right triangle △BCD, ;

[0066] According to the above two formulas, it can be obtained that:

[0067] ;

[0068] Then the can be obtained:

[0069] ;

[0070] Then according to to obtain :

[0071] ;

[0072] Among them, represents the distance between the upper RFID tag 6 and the RFID reader 3, represents the distance between the lower RFID tag 4 and the RFID reader 3, Indicates the distance between the lower RFID tag 4 and the upper RFID tag 6. Indicates the distance from the projection D point to the upper RFID tag 6.

[0073] Step 5: Move the fixing bracket 9 so that the height of the fixing bracket 9 above the bed surface 1 is half of the height That is, after the transducer 12 is installed on the fixing bracket 9, the height of the transducer 12 above the bed surface 1 is also half of the height To complete the positioning of the transducer zero point.

Claims

1. A right cardiac catheter inspection pressure transducer positioning device, comprising a bed surface (1) and a mounting frame (5) disposed on the bed surface (1); characterized in that: It also includes an RFID reader (3) placed on the patient, and a lower RFID tag (4) and an upper RFID tag (6) respectively mounted on the bottom and top of the mounting frame (5), wherein the detection point of the lower RFID tag (4) is flush with the top surface of the bed surface (1), and the upper RFID tag (6) is arranged on the top of the mounting frame (5); a lifting screw rod (7) is sleeved inside the mounting frame (5), and a fixing frame (9) movable along the axial direction of the mounting frame (5) is sleeved on the lifting screw rod (7); The RFID reader (3) emits a radio frequency signal, and the lower RFID tag (4) and the upper RFID tag (6) are activated after receiving the radio frequency signal and return a response signal containing their own coding information; the RFID reader (3) receives the response signals returned by the lower RFID tag (4) and the upper RFID tag (6), respectively, and calculates the distance between the lower RFID tag (4) and the RFID reader (3), and the upper RFID tag (6) and the RFID reader (3) according to the time from the emission of the radio frequency signal to the reception of the response signal, and calculates and determines the position of the fixing frame (9) according to the distance between the lower RFID tag (4) and the RFID reader (3), the upper RFID tag (6) and the RFID reader (3), and the lower RFID tag (4) and the upper RFID tag (6).

2. A right heart catheter inspection pressure transducer positioning device as claimed in claim 1, characterized in that: An internal connection hole (10) is provided in the mounting frame (5), and the lifting screw rod (7) is sleeved in the mounting frame (5) through the internal connection hole (10); An L-shaped connecting piece (11) is arranged on the back of the fixing frame (9), a threaded through hole (13) is provided at the threaded connection end of the L-shaped connecting piece (11), and the L-shaped connecting piece (11) is sleeved on the lifting screw rod (7) through the threaded through hole (13) and is threadedly connected to the lifting screw rod (7).

3. A right heart catheter inspection pressure measuring transducer positioning device as claimed in claim 2, characterized in that: A receiving hole (15) coaxial with the inner connecting hole (10) is formed in the mounting frame (5); a mounting groove (14) is formed on the mounting frame (5) along the axial direction of the mounting frame (5); the mounting groove (14) is communicated with the receiving hole (15); a threaded connection end of the L-shaped connecting piece (11) extends into the receiving hole (15) through the mounting groove (14); the lifting screw rod (7) passes through the inner connecting hole (10) and the threaded through hole (13) and is threadedly connected to the L-shaped connecting piece (11) through the threaded through hole (13).

4. A right heart catheter inspection pressure measuring transducer positioning device as claimed in claim 1, characterized in that: The fixing frame (9) comprises a fixing base plate (91) connected to the mounting frame (5), connecting plates (96) are arranged on both sides of the fixing base plate (91), back plates (95) are arranged on opposite sides of the other ends of the two connecting plates (96), and U-shaped areas for clamping the transducer (12) are formed at both ends of the fixing base plate (91); a supporting plate (97) is arranged in the middle of the inner bottom of the two connecting plates (96), and a clamping area (92) for placing the side edge (124) of the transducer (12) is formed between the supporting plate (97) and the fixing base plate (91).

5. A right heart catheter inspection pressure transducer positioning device as claimed in claim 4, characterized in that: A movable slide groove (98) is provided in the fixed base plate (91), and the connecting end of the connecting plate (96) extends into the movable slide groove (98); a clamping screw rod (94) is sleeved in the fixed base plate (91) along the length direction of the fixed base plate (91), and the threads at both ends of the clamping screw rod (94) are rotated in opposite directions, and the two ends of the clamping screw rod (94) are respectively threadedly connected to the connecting ends of the connecting plates (96) on both sides.

6. A method for positioning a pressure measuring transducer for right heart catheter examination, characterized in that: The device comprises a right cardiac catheter inspection pressure measuring transducer positioning device according to any one of claims 1 to 5; when the right cardiac catheter inspection pressure measuring transducer positioning device is used for positioning, the specific steps are as follows: Step 1, placing the RFID reader (3) at the fourth rib position of the patient in a supine position; Step 2, turning on the RFID reader (3) and emitting a radio frequency signal, and recording the time t1; the lower RFID tag (4) and the upper RFID tag (6) receive the radio frequency signal and are activated, and the lower RFID tag (4) and the upper RFID tag (6) emit a response signal containing their own coding information; the RFID reader (3) receives the response signals of the lower RFID tag (4) and the upper RFID tag (6), respectively, and records the time t2 and t3; Step 3, calculating the distance L2 between the RFID reader (3) and the lower RFID tag (4) according to the time t1 and t2, and calculating the distance L1 between the RFID reader (3) and the upper RFID tag (6) according to the time t1 and t3; Step 4: Calculate the height of the projection point D of the RFID reader (3) on the mounting frame (5) : ； ； in, represents the distance between the lower RFID tag (4) and the upper RFID tag (6), represents the distance between the projection point D and the upper RFID tag (6); Step 5, move the fixing frame (9) so that the fixing frame (9) is higher than the bed surface by a height of half.

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