JP6651386B2 - Sphygmomanometer - Google Patents

Description

  The present invention relates to a sphygmomanometer.

  There is a sphygmomanometer that simplifies the work for winding the cuff around the upper arm. Patent Document 1 describes a sphygmomanometer having a main body portion and an upper arm insertion portion, wherein the upper arm insertion portion is rotatably connected to the main body portion via a rotation connection mechanism. The main body has a display section, and the upper arm insertion section has a substantially cylindrical hollow portion into which the upper arm is inserted. The upper arm insertion portion is tilted toward the body when not in use, and is tilted toward the subject when in use. The subject measures the posture by adjusting the tilt angle of the upper arm insertion portion with the right arm, bending the elbow gently while inserting the forearm into the hollow portion, and placing the arm on the elbow rest provided on the upper surface of the main body.

Japanese Patent Application Laid-Open No. 2012-249841

  As described in Patent Literature 1, a sphygmomanometer of a type including a main body having a display portion and an upper arm insertion portion having a hollow portion into which an arm is inserted has a complicated structure and an increased size. Further, in such a type of sphygmomanometer, it is necessary to insert the forearm into the hollow part while adjusting the inclination angle of the upper arm insertion part, so that preparation work for measurement is troublesome. Further, since the hollow portion is merely a columnar cavity, the forearm is not guided at all when the forearm is inserted into the hollow portion, and is unstable for an unfamiliar person.

  An object of the present invention is to provide a sphygmomanometer having a structure advantageous for downsizing and simplifying preparation work for measurement.

  One aspect of the present invention relates to a sphygmomanometer having an insertion hole for inserting an arm in a housing, wherein the sphygmomanometer is disposed inside a display unit disposed on an upper surface of the housing and the insertion hole. A cuff for blood ischemia, wherein the cuff is an air bag arranged in a cylindrical shape along the inside of the insertion hole, and the inside of the air bag, viewed from a central axis of the insertion hole. A lower cushion disposed below, and the lower cushion includes an inclined portion having a thickness that increases from an entrance side to an exit side of the insertion hole.

  According to the present invention, there is provided a sphygmomanometer having a structure advantageous for miniaturization and simplification of preparation work for measurement.

FIG. 1 is a perspective view illustrating an appearance of a sphygmomanometer according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the sphygmomanometer according to the embodiment of the present invention. FIG. 2 is a sectional view of the sphygmomanometer according to the embodiment of the present invention. The figure which shows the structure which expanded the cuff. The figure which shows the mode of measurement of the blood pressure using the sphygmomanometer of embodiment of this invention. The figure which shows the result of a sensory test. FIG. 1 is a block diagram showing a configuration of a sphygmomanometer according to an embodiment of the present invention. The figure which illustrates the pressure (a) of a cuff, and the pulse-wave component (b) extracted from the said pressure. The figure explaining the detection of a pulse wave. FIG. 4 is a diagram showing a flow of control of pressurization in the embodiment of the present invention.

  Hereinafter, the present invention will be described through exemplary embodiments with reference to the accompanying drawings. FIG. 1 shows the appearance of a sphygmomanometer 100 according to one embodiment of the present invention. FIG. 2 is a cross-sectional view of the sphygmomanometer 100 of FIG. 1 taken along the XZ plane, and FIG. 3 is a cross-sectional view of the sphygmomanometer 100 of FIG. 1 taken along the line AA ′ in FIG. Have been. FIG. 2 is also a cross-sectional view of the sphygmomanometer of FIG. 3 taken along line BB. FIG. 5 schematically shows a state when the blood pressure is measured. The sphygmomanometer 100 can be used while being placed on the support surface 210 of the table 200.

  The sphygmomanometer 100 has a housing 10, and the housing 10 is provided with an insertion hole 12 into which the arm of the subject 300 is inserted. Further, the sphygmomanometer 100 includes a display unit 20 arranged on the upper surface 14 of the housing 10 and a cuff 30 for blood issuance arranged inside the insertion hole 12. The cuff 30 is arranged so as to tighten the arm of the subject 300, in other words, to surround the arm. In this specification, when it is described that an arm is inserted into the insertion hole 12, it means that the arm is inserted into a space surrounded by the cuff 30 arranged in the insertion hole 12.

  The configuration in which the display unit 20 is disposed in the housing 10 in which the insertion hole 12 is provided has a configuration as described in Patent Literature 1, that is, a housing in which the insertion hole is provided, and a main body in which the display unit is provided. This is advantageous for miniaturization as compared with a sphygmomanometer having the following.

  The insertion hole 12 has a shape in which the dimension on the entrance side of the insertion hole 12 is larger than the dimension on the exit side of the insertion hole 12. Here, the entrance side of the insertion hole 12 means the side where the hand first enters when the subject 300 inserts the arm into the insertion hole 12, and the exit side of the insertion hole 12 12 means the side where the hand comes out when the arm is pierced. The arm is inserted through the insertion hole 12 so that the palm faces upward, and the elbow is placed on the support surface 210. In this state, the sphygmomanometer 100 can rotate so that the display unit 20 moves away from the subject 300. Since the display unit 20 moves away from the eyes of the subject 300 due to this rotation, the display unit 20 is easy to see even for the subject 300 who is difficult to focus on a close place.

  The central axis CA of the insertion hole 12 is inclined downward in a direction from the entrance side of the insertion hole 12 to the exit side of the insertion hole 12. When the insertion hole 12 has a truncated cone shape, the insertion hole 12 may be described as having a shape in which the diameter of the insertion hole 12 on the entrance side is larger than the diameter of the insertion hole 12 on the exit side. According to the shape of the insertion hole 12 and the direction of the center axis CA, the subject 300 can easily insert the arm into the insertion hole 12. Therefore, the preparation work for measuring the blood pressure is simplified.

  As a result of the sensory evaluation, the angle θ1 formed between the central axis CA and the bottom surface 16 of the housing 10 is preferably in the range of 10 to 20 degrees, and more preferably in the range of 13 to 18 degrees. I understood. Also, as a result of the sensory evaluation, the height from the support surface 210 when the sphygmomanometer 100 is placed on the support surface 210 of the table 200 to the lower end on the exit side of the insertion hole 12 is within a range of 10 mm to 20 mm. It has been found that the thickness is preferably in the range, and more preferably in the range of 15 mm to 18 mm. If the height is too low, it is difficult to penetrate the forearm into the insertion hole 12, and it is difficult to dispose components below the insertion hole 12, thereby increasing design restrictions. In addition, when it is necessary to dispose a heavy object such as a battery above the insertion hole 12, a problem may occur that the sphygmomanometer 100 is easily turned over. If the height is too high, it is difficult to attach the elbow to the support surface 210 by rotating the sphygmomanometer 100 with the forearm penetrating the insertion hole 12, and the posture of the arm becomes unstable.

  In addition, as a result of the sensory evaluation, the dimension on the entrance side of the insertion hole 12 is in the range of 130 mm to 140 mm, and the dimension on the exit side of the insertion hole 12 is in the range of 120 mm to 130 mm, which is larger than the dimension on the entrance side. It has been found that smaller is preferred. It is preferable that the dimension of the insertion hole 12 gradually decreases from the vicinity of the inlet side to the vicinity of the outlet side. This is an advantageous size for adapting to arms of various thicknesses.

  The display unit 20 can be arranged such that the upper surface of the display unit 20 and the bottom surface 16 of the housing 10 form an acute angle. As a result of the sensory evaluation, it was found that the angle formed between the upper surface of the display unit 20 and the bottom surface 16 of the housing 10 was preferably in the range of 17 degrees to 20 degrees. An operation unit 25 may be arranged on the upper surface 14 of the housing 10. The operation unit 25 may be configured integrally with the display unit 20. The operation unit 25 may include, for example, a power switch, a button for instructing the sphygmomanometer 100 to start or stop measuring blood pressure, and the like. The operation unit 25 may include a microphone that captures the voice of the user such as the subject, and a voice recognition unit that processes the voice captured by the microphone and recognizes an instruction from the user.

  The sphygmomanometer 100 rotates the housing 10 on the bottom surface 16 of the housing 10 on the outlet side of the insertion hole 12 by the arm inserted into the insertion hole 12 in a use state in which the subject 300 inserts an arm into the insertion hole 12. A non-slip 40 serving as an axis when the operation is performed may be provided. Sphygmomanometer 100 may be configured such that bottom surface 16 of housing 10 is parallel to support surface 210 when sphygmomanometer 100 is placed on support surface 210 of table 200. The sphygmomanometer 100 may be configured such that the display unit 20 is parallel to the support surface 210 by rotating the housing 10 in the use state. Here, the term “parallel” does not mean only strict parallelism. For example, a deviation of up to 7 degrees can fall in a parallel category.

  The sphygmomanometer 100 may further include a storage unit 51 that stores one or more batteries 50. The accommodation portion 51 can be configured to hold one or a plurality of batteries 50 between the insertion hole 12 and the bottom surface 16 along a plane parallel to the bottom surface 16. The sphygmomanometer 100 may further include one or more pumps 60 between the insertion hole 12 and the side surface 17 of the housing 10 and between the housing portion 51 and the side surface 17. Pump 60 may be used to pump air to bladder 32 of cuff 30. Such a structure is advantageous for moving the insertion hole 12 below the housing 10. The sphygmomanometer 100 may include a cover 33 that covers the cuff 30 disposed inside the insertion hole 12. The cover 33 is made of a fiber having slipperiness and elasticity, for example, a cylinder formed of nylon containing urethane fiber.

  The cuff 30 has an air bladder 32 disposed in a cylindrical shape (a truncated cone shape) along the inside of the insertion hole 12, and is disposed inside the air bladder 32 and below the center axis CA of the insertion hole 12. And a lower cushion 34 provided. Further, the cuff 30 may further include a side cushion 35 which is located inside the air bag 32 and on both sides as viewed from the center axis CA of the insertion hole 12. Cushions, such as the lower cushion 34 and the side cushions 35, allow the pump 60 to quickly inflate the bladder 32 when the thin arm is inserted into the insertion hole 12, while the thick arm allows the insertion hole to be inflated. 12 allows the bladder 32 to be easily crushed when inserted.

  The case where the thin arm is inserted into the insertion hole 12 will be further described. The cushions 34 and 35 maintain the air bladder 32 in an inflated state to some extent even when the air is not supplied from the pump 60 to the air bladder 32. Has an effect. In the configuration without the cushions 34 and 35, the air bag 32 is considerably contracted when air is not supplied from the pump 60 to the air bag 32. Therefore, in the configuration without the cushions 34 and 35, when a thin arm is inserted into the insertion hole 12, it is necessary to send a large amount of air into the air bag 32, and it takes a long time to pressurize the arm. Become.

  As illustrated in FIG. 2, the lower cushion 34 preferably includes an inclined portion 34 a whose thickness increases from the entrance side to the exit side of the insertion hole 12. The angle formed by the upper surface of the inclined portion 34a of the lower cushion 34 and the bottom surface 16 of the housing 10 is preferably in the range of 0 to 15 degrees. Such a structure is effective to apply a forward upward force to the forearm when the forearm is being slowly inserted into the insertion hole 12, so that the forearm passes through the insertion hole 12. You will be guided.

  When an evaluation test was performed on the example having the inclined portion 34a and the comparative example having no inclined portion 34a, 9 out of 10 subjects (the thickness of the arm was 22.0 cm to 33.0 cm) were obtained. Thus, the result that the example was better than the comparative example was obtained. With respect to the remaining one person, the evaluation results of the example and the comparative example were the same. FIG. 6 shows the results of the evaluation test. The evaluation was made on the ease of insertion of the arm into the insertion hole 12, the ease of removal of the arm from the insertion hole 12, and the state at the time of measurement (when the elbow comes out of the insertion hole 12 and the appropriate part of the upper arm is inserted into the insertion hole 12 (cuff 30). ), Where the larger numbers indicate better results.

  Further, as exemplarily shown in FIG. 3, the two side cushions 35 preferably include an inclined portion whose thickness decreases from the entrance side to the exit side of the insertion hole 12. Since the side cushion 35 plays a role in positioning the arm in the left-right direction, the configuration in which the passage of the arm (hole of the cuff 30) is narrowed toward the exit side makes it easier to insert the arm straight.

  FIG. 4 shows a structure in which the cuff 30 is developed. An air bladder 32 and cushions 34 and 35 arranged inside the air bladder 32 are provided. The air bladder 32 can have a band-like shape when removed from the insertion hole 12. A pressing member 37 can be arranged inside the air bag 32. The pressing member 37 can function to press the air bladder 32 against the inner wall of the insertion hole 12. One or a plurality of microphones 39 can be arranged inside the air bag 32. The microphone 39 can be used to detect Korotkoff sounds. The air bladder 32 has a connection part (not shown), and can be connected to the pump 60 via the connection part and a tube.

  FIG. 7 shows a block diagram of the sphygmomanometer 100. The sphygmomanometer 100 can include a power supply 110, a storage unit 120, an exhaust valve 130, a detection unit 140, and a control unit 150 in addition to the cuff 30, the display unit 20, the operation unit 25, the microphone 39, and the pump 60 described above. Power supply 110 may include a housing 51 that houses battery 50 and / or a converter that converts a commercial AC voltage to a DC voltage. The storage unit 120 stores the measured data blood pressure (systolic blood pressure, diastolic blood pressure, pulse rate).

  The connection part provided in the air bag 32 of the cuff 30 is connected to the pump 60, the exhaust valve 130 and the detection part 140 via the tube 31. The exhaust valve 130 discharges air from the air bladder 32 of the cuff 30 via the tube 31 to reduce the pressure. The detector 140 detects the pressure of the air bag 32 via the tube 31. The control unit 150 includes, for example, a memory storing a program and a CPU, and controls the storage unit 120, the display unit 20, the operation unit 25, the microphone 39, the pump 60, the exhaust valve 130, and the detection unit 140 according to the program. Or execute a process for measuring blood pressure.

  FIG. 8A schematically shows the pressure detected by the detection unit 140 when the air bladder 32 of the cuff 30 is pressurized by the pump 60 to block the blood of the arm of the subject 300. I have. FIG. 8B schematically illustrates a pulse wave component M extracted by the control unit 150 based on the pressure schematically illustrated in FIG. The control unit 150 may extract the pulse wave component M by removing a low-frequency component from the pressure detected by the detection unit 140, for example.

  The control unit 150 detects individual pulses based on the pulse wave component M extracted from the pressure detected by the detection unit 140. Each pulse is a part constituting one peak. Here, an example will be described in which the detection unit 140 detects an individual pulse from the pulse wave component M extracted from the pressure detected by the detection unit 140. However, the detection unit 140 detects the pressure detected by the detection unit 140. May be used to detect individual pulses. In any case, the control unit 150 detects each pulse indirectly or directly from the pressure detected by the detection unit 140.

  Then, the control unit 150 satisfies the stop condition that the maximum value of the latest pulse wave is equal to or less than the maximum value of the previous pulse wave and the maximum value of the previous pulse wave is less than the maximum value of the pulse wave two times before. Next, the pressurization stop pressure is determined according to the latest maximum value of the pulse wave, and pressurization by the pump 60 is stopped according to the pressurization stop pressure. Then, after that, by opening the exhaust valve 130, the decompression of the air bag 32 of the cuff 30 is started. When the decompression of the air bladder 32 is started, the control unit 150 detects systolic blood pressure and diastolic blood pressure by detecting Korotkoff sound using the microphone 39 while monitoring the pressure of the air bladder 32 using the detection unit 140.

  The detection of a pulse wave by the control unit 150 will be exemplarily described with reference to FIG. The control unit 150 detects that the pulse wave component M has fallen below the threshold value TH1 (point a). Thereafter, the control unit 150 detects that the pulse wave component M has exceeded a threshold value TH2 that is larger than the threshold value TH1 (point b). At point b, control unit 150 temporarily identifies a pulse wave in pulse wave component M. After that, the control unit 150 detects the maximum value H of the pulse wave component M (pulse wave) until it detects that the pulse wave component M satisfies M ≦ 0 (point c). However, if the time from the point b to the point c is within a predetermined time (for example, 180 msec), the control unit 150 cancels the identification of the pulse wave in the pulse wave component M. The control unit 150 buffers (holds) the latest, previous, and last three pairs as a pair of the maximum value H of the pulse identified as described above and the pressure at that time. That is, the control unit 150 holds the latest pair, the previous pair, and the pair two times before. Buffering may be performed in the form of a ring buffer.

  FIG. 10 shows a flow of controlling the pressurization of the cuff 30 (air bag 32) by the pump 60. FIG. 10 shows control after the pressurization of the cuff 30 (air bag 32) by the pump 60 is started. The pulse detection described with reference to FIG. 9 is executed in parallel with the processing shown in FIG.

  In step S501, the control unit 150 determines whether the current pressure of the cuff 30 (air bag 32) detected by the detection unit 140 is equal to or higher than the upper limit pressure. If the current pressure is equal to or higher than the upper limit pressure, the process proceeds to step S513. Then, pressurization by the pump 60 is stopped. If the current pressure is lower than the upper limit pressure, the process proceeds to step S502. Here, the upper limit pressure is an upper limit value of a pressure range that is to be applied to the cuff 30 in the specification.

  In step S502, the control unit 150 determines whether or not a pulse wave of one or more beats is detected. If a pulse wave of one or more nights (one or more pulse waves) is detected, the control unit 150 proceeds to step S503. If the pulse wave has not been detected, the process proceeds to step S505.

  In step S503, the control unit 150 determines whether the pulse wave has disappeared after detecting the latest pulse wave. If the pulse wave has disappeared, the process proceeds to step S505, where the pulse wave disappears. If not, the process proceeds to step S504. Here, if a new pulse wave has not been detected for a predetermined time (for example, 1.8 sec) or more after the detection of the latest pulse wave, it can be determined that the pulse wave has disappeared.

  In step S504, it is determined whether or not the difference between the current pressure detected by the detection unit 140 and the pressure at the time of the maximum pulse wave (when the pulse wave shows the maximum value) is equal to or more than a predetermined value (for example, 60 mmHg). If the difference is equal to or more than the predetermined value, the process proceeds to step S505. If the difference is less than the predetermined value, the process proceeds to step S506. The fact that the difference is equal to or larger than the predetermined value indicates that the current pressure may be sufficiently higher than the subject's maximum blood pressure.

  In step S505, the control unit 150 determines whether or not the current pressure detected by the detection unit 140 is equal to or higher than the lower limit pressure (for example, 145 mmHg). If the current pressure is equal to or higher than the lower limit pressure, the process proceeds to step S513. If less, wait until the lower pressure is reached.

  In step S506, the control unit 150 determines whether or not three or more pulse waves (three or more pulse waves) are detected. If three or more pulse waves are detected, the process proceeds to step S507. Otherwise, the process returns to step S501. Here, whether or not three or more pulse waves are detected can be determined, for example, by counting the number of pulses detected after the start of pressurization.

  In step S507, the control unit 150 branches the process according to the pulse rate of the subject. That is, in step S507, if the current pulse rate is in the first pulse rate range (for example, a range smaller than 100 beats / minute), the control unit 150 proceeds to step S508, and proceeds to step S508, where the second pulse rate does not overlap with the first pulse rate range. If it is within a range (for example, a range larger than 100 beats / minute), the process proceeds to step S512. The control unit 150 can calculate the pulse rate based on the pressure detected by the detection unit 140. For example, the control unit 150 can calculate a pulse rate based on a pulse wave component extracted from the pressure detected by the detection unit 140. More specifically, control unit 150 can calculate the pulse rate based on the time interval between the latest pulse wave and the previous pulse wave, for example.

  In step S508, the control unit 150 determines whether a first stop condition as a stop condition for stopping pressurization is satisfied. If the first stop condition is satisfied, the process proceeds to step S509. It returns to step S501. Here, the first stop condition is that, for example, the maximum value of the latest pulse wave is equal to or less than the maximum value of the previous pulse wave, and the maximum value of the previous pulse wave is the first ratio (2) (For example, 70%) or less.

  In step S512, the control unit 150 determines whether or not a second stop condition as a stop condition for stopping pressurization is satisfied. If the second stop condition is satisfied, the process proceeds to step S509. It returns to step S501. Here, the second stop condition is, for example, that the maximum value of the latest pulse wave is equal to or less than the maximum value of the previous pulse wave, and the maximum value of the previous pulse wave is a second ratio ( (For example, 80%) or less, and the second ratio is different from the first ratio.

  As one example, the first pulse rate range is a normal pulse rate range, and the second pulse rate range is a range whose lower limit is larger than the upper limit of the first pulse range (a range indicating a state called tachycardia). Can be set to In this example, a ratio larger than the first ratio can be set as the second ratio. Here, two pulse rate ranges and two corresponding stop conditions are described. However, three or more pulse rate ranges and three corresponding stop conditions may be set.

  In step S509, the control unit 150 determines whether the current pressure detected by the detection unit 140 is equal to or higher than the lower limit pressure (for example, 145 mmHg). If less, wait until the lower pressure is reached.

  In step 510, control unit 150 determines a pressurization stop pressure that is a pressure at which pressurization by pump 60 is stopped. For example, the control unit 150 determines the pressurization stop pressure according to the latest maximum value of the pulse wave. More specifically, the control unit 150 can determine, as the pressurization stop pressure, a pressure obtained by adding a predetermined value (for example, 10 mmHg to 30 mmHg, preferably 20 mmHg) to the maximum value of the latest pulse wave. Note that the predetermined value is typically a positive value. By determining the pressurization stop pressure by such a method, the necessity of repressurization and failure of blood pressure measurement can be more reliably prevented.

  In step S511, the control unit 150 waits until the current pressure detected by the detection unit 140 reaches the pressurization stop pressure determined in step S510, and the current pressure changes to the pressurization stop pressure determined in step S510. Upon reaching, the process proceeds to step S513, and the pressurization by the pump 60 is stopped.

  The processes of steps S506 to S512 detect a pulse wave based on the pressure detected by the detection unit 140, and the maximum value of the latest pulse wave is equal to or less than the maximum value of the previous pulse wave, When the stop condition that the value is less than the maximum value of the pulse wave of the previous two times is satisfied, the pressurization stop pressure is determined according to the latest maximum value of the pulse wave, and pressurization by the pump 60 is performed according to the pressurization stop pressure. This is the process of stopping. The correlation between the maximum values of three consecutive pulse waves indicates with high accuracy that the cuff pressure has exceeded the subject's systolic blood pressure. This has been confirmed through evaluations using a large number of subjects. Therefore, by determining the pressurization stop pressure based on the mutual relationship between the maximum values of three consecutive pulse waves, the pressurization stop pressure can be determined with higher accuracy. Thereby, the necessity of re-pressurization and the failure of blood pressure measurement can be reduced to a very small level.

100: Sphygmomanometer, 10: Housing, 12: Insertion hole, 14: Top, 16: Bottom, 17: Side, 20: Display, 25: Operation, 30: Cuff, 32: Tube, 32: Air bag, 33 : Cover, 34: lower cushion, 34a: inclined portion, 35: side cushion, 37: pressing member, 40: non-slip, 50: battery, 51: housing, 60: pump, CA: central axis, 200: table , 210: support surface, 300: subject

Claims (9)

A sphygmomanometer having an insertion hole for inserting an arm in a housing,
A display unit disposed on an upper surface of the housing;
And a cuff for ischemia arranged inside the insertion hole,
The cuff is
An air bladder arranged in a cylindrical shape along the inside of the insertion hole,
A lower cushion that is located inside the air bag and that is located below when viewed from a central axis of the insertion hole,
The lower cushion includes an inclined portion having an increased thickness from an entrance side to an exit side of the insertion hole.
A sphygmomanometer characterized in that: The cuff further includes a side cushion inside the air bag and disposed on both sides as viewed from the center axis of the insertion hole,
The side cushion includes an inclined portion whose thickness decreases from the entrance side of the insertion hole toward the exit side.
The sphygmomanometer according to claim 1, wherein: The insertion hole, the size of the inlet side is larger than the size of the outlet side, the center axis of the insertion hole is inclined downward in the direction from the inlet side to the outlet side,
The sphygmomanometer according to claim 1 or 2, wherein: The angle formed by the central axis and the bottom surface of the housing is within a range of 10 degrees to 20 degrees.
The blood pressure monitor according to claim 3, wherein: The bottom surface of the housing is parallel to the support surface when the sphygmomanometer is placed on the support surface of a table,
The sphygmomanometer according to any one of claims 1 to 4, wherein: The angle formed between the upper surface of the inclined portion of the lower cushion and the bottom surface of the housing is within a range of 0 to 10 degrees.
The sphygmomanometer according to any one of claims 1 to 5, wherein: The dimension of the insertion hole is gradually reduced from the vicinity of the entrance side to the vicinity of the exit side.
The blood pressure monitor according to any one of claims 1 to 6, wherein: The height from the support surface when the sphygmomanometer is placed on a support surface of a table to a lower end of the insertion hole on the outlet side is within a range of 10 mm to 20 mm.
The blood pressure monitor according to any one of claims 1 to 7, wherein: The dimensions of the insertion hole on the entrance side are in the range of 130 mm to 140 mm.
The sphygmomanometer according to any one of claims 1 to 8, wherein:

Images