Noninvasive blood pressure module and patient monitor

Abstract

The utility model provides a noninvasive blood pressure module and a patient monitor. The non-invasive blood pressure module comprises a base, and a closed air chamber is formed in the base. The pump is installed on the base and located outside the air chamber, and a pressurized air output port of the pump leads to the air chamber; the first exhaust valve and the second exhaust valve are installed on the base and located outside the gas chamber, the first exhaust valve is communicated with the pressurized gas area of the gas chamber, and the second exhaust valve is communicated with the pressure reduction area of the gas chamber; a first port in communication with the pressurized gas zone and connectable to a cuff; and a second port in communication with the pressurized gas region and connectable to a pressure sensor. According to the non-invasive blood pressure module, the size of the non-invasive blood pressure module can be reduced, meanwhile, the use and maintenance cost of a user is greatly reduced, the manufacturing process and steps of the non-invasive blood pressure module become simple, and the manufacturing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a patient monitor, in particular to a non-invasive blood pressure module for a patient monitor and a patient monitor including such a non-invasive blood pressure module. Background Art

[0002] A patient monitor is used to collect, analyze, store, display and print multiple physiological parameters of a patient, so as to facilitate medical staff to understand the physiological state of the patient. Therefore, a patient monitor usually includes a non-invasive blood pressure module for measuring the blood pressure of the patient.

[0003] Existing non-invasive blood pressure modules include assembled and integrated non-invasive blood pressure modules. The assembled non-invasive blood pressure module uses multiple gas pipelines to connect components such as a pump, a valve, a six-way structure, a flow nozzle and a sensor, and these connected components are assembled on a base. Due to the large number of gas pipelines and the complex pipeline layout, the manufacturing process of the assembled non-invasive blood pressure module is cumbersome, the efficiency is low, and the volume of the assembled module is relatively large, which requires a large space in the patient monitor.

[0004] The integrated non-invasive blood pressure module integrates a pump, a valve, a pressure sensor and an air chamber on the module, and has a small volume and light weight. However, in the integrated non-invasive blood pressure module, the most easily damaged valve and gas pressure sensor are both sealed in the air chamber. If any one of the valve and the gas pressure sensor fails, they cannot be replaced separately, which will result in relatively high usage and maintenance costs for users. In addition, the conductive line for leading out the signal sensed by the gas pressure sensor from the pressure sensor in the air chamber will make the welding process for forming the air chamber complicated and also requires the use of glue to seal the gap, reducing the manufacturing efficiency.

[0005] Therefore, it is necessary to improve the existing non-invasive blood pressure module for a patient monitor. Summary of the Utility Model

[0006] The purpose of the utility model is to overcome at least one defect in the above-mentioned existing technologies, and provide a non-invasive blood pressure module for a patient monitor and a patient monitor including such a non-invasive blood pressure module. This non-invasive blood pressure module can greatly reduce the usage and maintenance costs of users while reducing the volume, and simplifies the manufacturing process and steps of the non-invasive blood pressure module, improving the manufacturing efficiency.

[0007] According to one aspect of the utility model, a non-invasive blood pressure module is provided, characterized in that the non-invasive blood pressure module includes:

[0008] A base, in which a sealed air chamber is formed;

[0009] A pump installed on the base and located outside the air chamber, and a pressurized gas output port of the pump leads to the air chamber;

[0010] A first exhaust valve and a second exhaust valve installed on the base and located outside the air chamber, the first exhaust valve communicates with the pressurized gas area of the air chamber, and the second exhaust valve communicates with the decompression area of the air chamber;

[0011] A first port that communicates with the pressurized gas area and can be connected to a cuff; and

[0012] A second port that communicates with the pressurized gas area and can be connected to a pressure sensor.

[0013] Optionally, the non-invasive blood pressure module further includes an electrical connector electrically connected to the pump, the first exhaust valve, and the second exhaust valve through a wire.

[0014] Optionally, the non-invasive blood pressure module further includes a control circuit board, on which a socket and a pressure sensor are provided, the electrical connector is inserted into the socket, and the second port communicates with the pressure sensor.

[0015] Optionally, the base includes a base body and a sealing sheet installed on the base body to form the air chamber.

[0016] Optionally, the base body includes an air chamber forming area for forming the air chamber, a first placement area for placing the first exhaust valve, a second placement area for placing the second exhaust valve, and a third placement area for placing the pump.

[0017] Optionally, the air chamber forming area includes a concave area and a groove area, the sealing sheet is welded to the air chamber forming area of the base body, so that the base body and the sealing sheet in the concave area together define the pressurized gas area, and the base body and the sealing sheet in the groove area together define the decompression area.

[0018] Optionally, the first placement area is formed as a first cavity adjacent to the air chamber forming area, the second placement area is formed as a second cavity adjacent to the air chamber forming area, a first mounting hole that penetrates the first placement area and the concave area and a second mounting hole that penetrates the second placement area and the groove area are further formed on the base body, the first exhaust valve is placed in the first cavity, and a first gas inlet port of the first exhaust valve is inserted into the first mounting hole to communicate with the pressurized gas area, and the second exhaust valve is placed in the second cavity, and a second gas inlet port of the second exhaust valve is inserted into the second mounting hole to communicate with the decompression area.

[0019] Optionally, a first stop portion is provided on the side wall defining the first cavity, and a first elastic protrusion portion is provided at one end of the first cavity opposite to the first mounting hole to hold the first exhaust valve in place; and a second stop portion is provided on the side wall defining the second cavity, and a second elastic protrusion portion is provided at one end of the second cavity opposite to the second mounting hole to hold the second exhaust valve in place.

[0020] Optionally, the third placement area includes at least two spaced-apart positioning fins for supporting and fixing the pump, and a gas inlet communicating with the pressurized gas area is formed on the base body. When the pump is held in the installation position by the positioning fins, the pressurized gas output port of the pump is pushed into the gas inlet.

[0021] Optionally, the second port is formed in a direction substantially perpendicular to the main plane of the base body.

[0022] Optionally, the air chamber forming area is in a T shape, the first placement area and the second placement area are rectangular and located on one side of the vertical branch of the T-shaped air chamber forming area, and the third placement area is located on the other side of the vertical branch.

[0023] According to another aspect of the present invention, a patient monitor is provided, characterized in that the patient monitor includes the non-invasive blood pressure module as described above.

[0024] In the non-invasive blood pressure module according to the present invention, since the pump, the first exhaust valve, and the second exhaust valve are all located outside the air chamber, and the non-invasive blood pressure module according to the present invention is further provided with a second port communicating with the pressurized gas area of the air chamber and capable of communicating with the pressure sensor, no components are provided in the air chamber, that is, all vulnerable components of the non-invasive blood pressure module are provided outside the air chamber. When vulnerable components such as valves and pressure sensors fail, the faulty components can be easily replaced, so that the volume of the non-invasive blood pressure module can be significantly reduced while greatly reducing the user's use and maintenance costs. In addition, since no components are provided in the air chamber, there is no need to lead out conductive lines from the air chamber, making the manufacturing process and steps of the non-invasive blood pressure module according to the present invention simple and improving the manufacturing efficiency. Description of the Drawings

[0025] Figure 1 Schematically shows a non-invasive blood pressure module according to a preferred embodiment of the present invention in a perspective view;

[0026] Figure 2 is Figure 1 Another perspective view of the shown non-invasive blood pressure module;

[0027] Figure 3 is Figure 1 The perspective view of the non-invasive blood pressure module shown from the other side;

[0028] Figure 4 is Figure 1 Another perspective view of the non-invasive blood pressure module shown from the other side;

[0029] Figure 5 is Figure 1 The exploded perspective view of the non-invasive blood pressure module shown;

[0030] Figure 6 Schematically shows the base body of the non-invasive blood pressure module according to the preferred embodiment of the present invention in a perspective view;

[0031] Figure 7 is Figure 6 Another perspective view of the base body shown;

[0032] Figure 8 is Figure 6 The perspective view of the base body shown from the other side;

[0033] Figure 9 is Figure 6 Another perspective view of the base body shown from the other side;

[0034] Figure 10 is Figure 1 The top view of the non-invasive blood pressure module shown; and

[0035] Figure 11 is the cross-sectional view along Figure 11 the center line A-A. Detailed Description of the Preferred Embodiment

[0036] The following will describe in detail the specific embodiments of the present invention with reference to the accompanying drawings, but it should be understood that the drawings are only used to illustrate the present invention and do not constitute a limitation to the present invention.

[0037] Figure 1 Schematically shows the non-invasive blood pressure module according to the preferred embodiment of the present invention in a perspective view, Figure 2 is Figure 1 Another perspective view of the non-invasive blood pressure module shown, Figure 3 is Figure 1 The perspective view of the non-invasive blood pressure module shown from the other side, Figure 4 is Figure 1 Another perspective view of the non-invasive blood pressure module shown from the other side, and Figure 5 is Figure 1 The exploded perspective view of the non-invasive blood pressure module shown. As Figure 1-5As shown, the non-invasive blood pressure module 1 according to a preferred embodiment of the present invention generally includes a base 3, and a sealed air chamber 5 is formed in the base 3. A pump 7 for compressing gas is installed on the base 3 and is located outside the air chamber 5, and the pressurized gas output port 7a of the pump 7 leads to the air chamber 5. A first exhaust valve 9 and a second exhaust valve 11, which are located outside the air chamber 5, are also installed on the base. The first exhaust valve 9 is communicated with the pressurized gas area of the air chamber 5 so as to quickly exhaust air from the air chamber 5 when the first exhaust valve 9 is opened; the second exhaust valve 11 is communicated with the decompression area of the air chamber 5 so as to slowly exhaust air from the air chamber 5 when the second exhaust valve 11 is opened. The non-invasive blood pressure module 1 according to a preferred embodiment of the present invention further includes a first port 13 and a second port 15 that are communicated with the pressurized gas area of the air chamber 5. The first port 13 can be connected to a cuff for binding to a patient's arm through a pipeline, and the second port 15 can be communicated with a pressure sensor (not shown) provided on a control circuit board (not shown). The non-invasive blood pressure module 1 according to a preferred embodiment of the present invention also includes an electrical connector 19 that is electrically connected to the pump 7, the first exhaust valve 9, and the second exhaust valve 11 through a wire 17. The electrical connector 19 can be plugged into the control circuit board so that the operation of the pump 7, the first exhaust valve 9, and the second exhaust valve 11 can be controlled by the control circuit board.

[0038] The base 3 includes a base body 21 and a sealing sheet that is installed on the body 21 to form the air chamber 5. Figure 6 The base body of the non-invasive blood pressure module according to a preferred embodiment of the present invention is schematically shown in a perspective view. Figure 7 is Figure 6 Another perspective view of the shown base body. Figure 8 is Figure 6 A perspective view of the shown base body observed from the other side. Figure 9 is Figure 6 Another perspective view of the shown base body observed from the other side. As Figure 6-9As shown, the base body 21 of the non-invasive blood pressure module according to a preferred embodiment of the present invention includes an air chamber forming region 23 for forming an air chamber 5, a first placement region 25 for placing a first exhaust valve 9, a second placement region 27 for placing a second exhaust valve 11, and a third placement region 29 for placing a pump 7. A recessed region 31 and a groove region 33 such as a zigzag or wavy shape are formed in the air chamber forming region 23. Although the recessed region 31 may be a region penetrating the base body, in a preferred embodiment, the recessed region 31 is formed as a region recessed from two opposite surfaces of the base body into the interior of the base body and communicating with each other through a through opening 34. It should be noted, however, that the recessed region 31 does not need to recess into the interior of the base body from two opposite surfaces of the base body in the same shape and degree. In addition, it is also feasible that the recessed region 31 only recesses into the interior of the base body from one side surface of the base body. The first placement region 25 and the second placement region 27 are respectively formed as a first cavity and a second cavity adjacent to the air chamber forming region 23 to receive the first exhaust valve 9 and the second exhaust valve 11 respectively. The third placement region 29 includes at least two spaced positioning fins 35 for supporting and fixing the pump 7. In a preferred embodiment, it is shown that two spaced positioning fins 35 are provided to support and fix the pump 7 in place.

[0039] To form a gas passage, a gas inlet 37 communicating with the recessed region 31 of the air chamber forming region 23 is formed on the base body 21, and the first port 13 and the second port 15 on the base body 21 are also formed to communicate with the recessed region 31 of the air chamber forming region 23. Preferably, the second port 15 is formed along a direction substantially perpendicular to the main plane of the base body 21 (i.e., the plane where the air chamber forming region 23, the first placement region 25, and the second placement region 27 are located). A first mounting hole 39 penetrating the first cavity of the first placement region 25 and the recessed region 31 of the air chamber forming region 23, and a second mounting hole 41 penetrating the second cavity of the second placement region 27 and the groove region 33 of the air chamber forming region 23 are also formed on the base body 21. Although in a preferred embodiment the second mounting hole 41 communicates with the groove region 33 of the air chamber forming region 23 through a through hole 42 penetrating the base body 21, it is also feasible that the second mounting hole 41 directly communicates with the groove region 33 of the air chamber forming region 23. Preferably, the air chamber forming region 23 of the base body 21 is generally T-shaped, the first placement region 25 and the second placement region 27 are generally rectangular and located on one side of the vertical branch of the T-shaped air chamber forming region 23, and the third placement region 29 for placing the pump 7 is located on the other side of the vertical branch of the T-shaped air chamber forming region 23, so that the assembled entire non-invasive blood pressure module has a generally compact structure.

[0040] The manufacturing and assembly process of the non-invasive blood pressure module according to a preferred embodiment of the present invention will be described below.

[0041] First, a base body 21 as shown above is provided. The base body 21 can be made of any suitable material such as metal or plastic. Although the base body can be made by machining, the base body 21 is preferably integrally cast from a metal material or integrally injection-molded from a plastic material. Next, a first sealing sheet 43 is welded to one side of the air chamber forming region 23 of the base body 21, and a second sealing sheet 45 is welded to the other side of the air chamber forming region 23 of the base body 21, so as to hermetically cover the recessed region 31 and the groove region 33 of the air chamber forming region 23, thereby causing the base body 21, the first sealing sheet 43, and the second sealing sheet 45 to jointly define an air chamber 5. More specifically, the base body 21, the first sealing sheet 43, and the second sealing sheet 45 in the recessed region 31 of the air chamber forming region 23 jointly define a pressurized gas region of the air chamber 5, and the base body 21, the first sealing sheet 43, and the second sealing sheet 45 in the groove region 33 of the air chamber forming region 23 jointly define a decompression region of the air chamber 5 that communicates with the pressurized gas region. The pressurized gas region means that the gas pressure in this region is approximately the same as the pressure of the compressed gas output by the pump 7, and the decompression region means that the gas pressure in this region is reduced relative to the gas pressure in the pressurized gas region. The gas pressure in the decompression region is reduced relative to the gas pressure in the pressurized gas region because grooves in the form of, for example, serrations or corrugations are formed in the groove region 33, resulting in an increased flow resistance of the gas therein, and the pressure of the gas has been reduced when it flows through the grooves in the form of serrations or corrugations to near the second mounting hole 41. Preferably, the first sealing sheet 43 and the second sealing sheet 45 are plastic sheets and the base body 21 is made of a plastic material, so that the first sealing sheet 43 and the second sealing sheet 45 can be welded to the air chamber forming region 23 of the base body 21 by laser welding. More preferably, the first sealing sheet 43 and the second sealing sheet 45 are transparent plastic sheets, so as to observe whether there are welding defects such as air bubbles or pores in the welding area. Although in the preferred embodiment, the first sealing sheet 43 and the second sealing sheet 45 are welded to opposite sides of the base body 21 respectively, it should be understood that if both the recessed region 31 and the groove region 33 are formed on the same side of the base body 21, it is also feasible to weld the sealing sheet only on the side of the base body where the recessed region 31 and the groove region 33 are formed.

[0042] Subsequently, the first exhaust valve 9 is placed into the first cavity of the first placement area 25, and the first gas inlet port 9a of the first exhaust valve 9 is inserted into the first mounting hole 39 to communicate with the pressurized gas area of the air chamber 5. To prevent gas leakage, a first sealing ring 9b can be provided between the first gas inlet port 9a of the first exhaust valve 9 and the wall of the first mounting hole 39. Preferably, first stop portions 25a extending towards the first cavity are provided on two opposite side walls defining the first cavity of the first placement area 25, and a first elastic protrusion 25b is provided at one end of the first cavity of the first placement area 25 opposite to the first mounting hole 39. When installing the first exhaust valve 9, the first elastic protrusion 25b is pressed downwards and the first exhaust valve 9 is pushed towards the first mounting hole 39 below the first stop portion 25a, so that the first gas inlet port 9a of the first exhaust valve 9 is pushed into the first mounting hole 39. At this time, the first elastic protrusion 25b automatically resets and abuts against the first exhaust valve 9, and together with the first mounting hole 39 and the first stop portion 25a, the first exhaust valve 9 is reliably held in place without the need for other fasteners, such as Figure 11 as shown. Second stop portions 27a extending towards the second cavity can be provided on two opposite side walls defining the second cavity of the second placement area 27, and a second elastic protrusion 27b can be provided at one end of the second cavity of the second placement area 25 opposite to the second mounting hole 41. Thus, the second exhaust valve 11 can be installed in the second cavity of the second placement area 27 in the same manner as the first exhaust valve 9, and the second exhaust valve 11 is reliably held in place by the second stop portion 27a, the second elastic protrusion 27b and the second mounting hole 41 together without the need for other fasteners. To prevent gas leakage, a second sealing ring 11b can also be provided between the second gas inlet port 11a of the second exhaust valve 11 and the wall of the second mounting hole 42.

[0043] Next, the pressurized gas output port 7a of the pump 7 is pushed into the gas inlet 37 communicating with the recessed area 31 on the base body 21. At this time, the pump 7 is just fixed in place by the support structures on the two positioning fins 35. To prevent gas leakage, a third sealing ring 7b can also be provided between the pressurized gas output port 7a of the pump 7 and the wall of the gas inlet 37. To prevent the external transmission of mechanical vibration during the operation of the pump, a buffer pad 47 can be provided on the outer shell of the pump 7. In addition, the pump 7 can also be strapped to the base body 21 by a tightening band 49 to prevent the pump 7 from loosening. Finally, the wires 17 electrically connected to the pump 7, the first exhaust valve 9 and the second exhaust valve 11 are arranged and the wires 17 are placed into the wire trough 51 on the base body 21.

[0044] The non-invasive blood pressure module according to the preferred embodiment of the present invention may further include a control circuit board, on which a socket and a pressure sensor are provided. The electrical connector 19 to which the wire 17 is electrically connected can be inserted into the matching socket on the control circuit board. The second port 15 can be connected to the pressure sensor on the control circuit board through a pipeline to measure the gas pressure in the air chamber 5. The formation of the second port 15 along a direction substantially perpendicular to the main plane of the base body 21 helps the communication between the second port 15 and the pressure sensor on the control circuit board. In the preferred embodiment, two pressure sensors can be provided on the control circuit board, and thus two second ports 15 are formed on the base body 21. It should be understood that the number of the second ports 15 on the base body 21 can be less than or more than two according to the number of the pressure sensors on the circuit board.

[0045] When the non-invasive blood pressure module according to the preferred embodiment of the present invention is in operation, the control circuit board transmits a start instruction to the pump 7 through the wire 17, and the pump 7 operates to deliver the pressurized gas to the pressurized gas area in the air chamber 5. The pressurized gas is delivered from the first port 13 communicating with the pressurized gas area to the cuff through the gas pipeline, and at the same time, the pressurized gas is also delivered from the second port 15 communicating with the pressurized gas area to the pressure sensor on the control circuit board through the gas pipeline to continuously detect the gas pressure in the pressurized gas area in the air chamber 5. During the measurement of the patient's blood pressure, the pressurized gas also flows from the pressurized gas area through the decompression area of the air chamber 5 to the second exhaust valve 11, and the second exhaust valve 11 is rhythmically opened under the control of the control circuit board to slowly exhaust gas rhythmically from the second exhaust valve 11. After the measurement of the patient's blood pressure is completed, the control circuit board controls the first exhaust valve 9 communicating with the pressurized gas area of the air chamber 5 to open to quickly discharge the pressurized gas from the air chamber 5.

[0046] No vulnerable components such as valves and pressure sensors are provided in the air chamber of the non-invasive blood pressure module according to the present invention, but the vulnerable components are arranged outside the air chamber. In this way, when a vulnerable component such as a valve and a pressure sensor fails, the faulty component can be easily replaced, so that the volume of the non-invasive blood pressure module can be significantly reduced while the user's use and maintenance costs can be greatly reduced. In addition, since no components are provided in the air chamber and no conductive lines need to be led out of the air chamber, the manufacturing process and steps of the non-invasive blood pressure module become simple, improving the manufacturing efficiency.

[0047] Although the present invention has been described in detail in conjunction with the preferred embodiments of the present invention, it should be understood that such a detailed description is only for explaining the present invention and does not constitute a limitation to the present invention. The scope of the present invention is determined by the technical solutions defined by the claims.

Claims

1. A non-invasive blood pressure module, characterized in that: The non-invasive blood pressure module comprises: A base (3), wherein a sealed air chamber (5) is formed on the base (3); a pump (7) mounted on the base (3) and located outside the air chamber (5), wherein a pressurized gas output port (7a) of the pump (7) leads to the air chamber (5); a first exhaust valve (9) and a second exhaust valve (11) mounted on the base (3) and located outside the air chamber (5), the first exhaust valve (9) being in communication with a pressurized gas region of the air chamber (5), and the second exhaust valve (11) being in communication with a decompressed gas region of the air chamber (5); a first port (13) in communication with the pressurized gas region and connectable to a cuff; and A second port (15) is in communication with the pressurized gas region and is connectable to a pressure sensor.

2. The non-invasive blood pressure module according to claim 1, characterized in that: The non-invasive blood pressure module also includes an electrical connector (19) electrically connected to the pump (7), the first exhaust valve (9) and the second exhaust valve (11) via a wire (17).

3. The non-invasive blood pressure module according to claim 2, characterized in that: The non-invasive blood pressure module also includes a control circuit board, on which a socket and a pressure sensor are provided, the electrical connector (19) is inserted into the socket, and the second port (15) is connected to the pressure sensor.

4. The non-invasive blood pressure module according to claim 1, characterized in that: The base (3) comprises a base body (21) and a sealing sheet mounted on the base body (21) to form the air chamber (5).

5. The non-invasive blood pressure module according to claim 4, characterized in that: The base body (21) comprises an air chamber forming area (23) for forming the air chamber (5), a first placement area (25) for placing the first exhaust valve (9), a second placement area (27) for placing the second exhaust valve (11), and a third placement area (29) for placing the pump (7).

6. The non-invasive blood pressure module according to claim 5, characterized in that: The air chamber forming area (23) includes a recessed area (31) and a groove area (33), and the sealing sheet is welded to the air chamber forming area (23) of the base body (21), so that the base body (21) and the sealing sheet in the recessed area (31) together define the pressurized gas area, and the base body (21) and the sealing sheet in the groove area (33) together define the decompression area.

7. The non-invasive blood pressure module according to claim 6, characterized in that: The first placement area (25) is formed as a first cavity adjacent to the gas chamber forming area (23), and the second placement area (27) is formed as a second cavity adjacent to the gas chamber forming area (23). The base body (21) is also formed with a first mounting hole (39) that connects the first placement area (25) with the recessed area (31) and a second mounting hole (41) that connects the second placement area (27) with the groove area (33). The first exhaust valve (9) is placed in the first cavity, and the first gas inlet port (9a) of the first exhaust valve (9) is inserted into the first mounting hole (39) so as to communicate with the pressurized gas area. The second exhaust valve (11) is placed in the second cavity, and the second gas inlet port (11a) of the second exhaust valve (11) is inserted into the second mounting hole (41) so as to communicate with the decompression area.

8. The non-invasive blood pressure module according to claim 7, characterized in that: A first stopper (25a) is provided on a side wall defining the first cavity, and a first elastic protrusion (25b) is provided at an end of the first cavity opposite to the first mounting hole (39) to keep the first exhaust valve (9) in place; and a second stopper (27a) is provided on a side wall defining the second cavity, and a second elastic protrusion (27b) is provided at an end of the second cavity opposite to the second mounting hole (41) to keep the second exhaust valve (11) in place.

9. The non-invasive blood pressure module according to claim 6, characterized in that: The third placement area (29) includes at least two spaced-apart positioning fins (35) for supporting and fixing the pump (7), and a gas inlet (37) connected to the pressurized gas area is formed on the base body (21). When the pump (7) is held in the installation position by the positioning fins (35), the pressurized gas output port (7a) of the pump (7) is pushed into the gas inlet (37).

10. The non-invasive blood pressure module according to claim 4, characterized in that: The second port (15) is formed along a direction substantially perpendicular to a main plane of the base body (21).

11. The non-invasive blood pressure module according to claim 5, characterized in that: The air chamber forming area (23) is T-shaped, the first placement area (25) and the second placement area (27) are rectangular and are located on one side of a vertical branch of the T-shaped air chamber forming area (23), and the third placement area (29) is located on the other side of the vertical branch.

12. A patient monitor, characterized in that: The patient monitor comprises the non-invasive blood pressure module as described in any one of claims 1-11.

Images