Blood pressure monitor calibration
First Claim
1. A method for checking or adjusting the calibration of a blood pressure monitor, the blood pressure monitor including a pressure sensing means, comprising the steps of providing at least one disposable, single use sealed canister, the canister containing a known, predetermined, stored pressure, connecting the canister in fluid communication with the pressure sensing means so as to apply the known pressure to the pressure sensing means, obtaining a reading from the pressure sensing means while the canister is in fluid communication therewith, and comparing the reading obtained from the pressure sensing means with an expected reading so as to check or calibrate the blood pressure monitor;
- wherein each instance of calibration is carried out with a new said disposable, single use sealed canister.
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Accused Products
Abstract
A blood pressure monitor, particularly of the type having an inflatable cuff communicating with a pressure sensor and suitable for home use, may be calibrated by applying a sealed canister containing gas at a known pressure to a port so as to apply the known pressure to the pressure sensor, and comparing a pressure signal from the pressure sensor with the known pressure so as to determine a calibration error of the sensor and/or adjust the calibration of the sensor, e.g. by electronically adjusting the sensor. Several canisters may be used to calibrate the sensor across a range of pressures, each canister having a different known pressure. Each canister is preferably ruptured when attached to the port and is not re-usable, and may comprise an identifier such as an electronically readable identifier which is stored in a memory in association with the value of the known pressure within the canister. Temperature sensing means may be provided whereby the pressure reading is adjusted to compensate for temperature, e.g. of the gas released from the canister. The monitor may comprise means for sensing mechanical shock and alerting a user or remote monitoring personnel to provide an indication that recalibration is required.
13 Citations
16 Claims
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1. A method for checking or adjusting the calibration of a blood pressure monitor, the blood pressure monitor including a pressure sensing means, comprising the steps of providing at least one disposable, single use sealed canister, the canister containing a known, predetermined, stored pressure, connecting the canister in fluid communication with the pressure sensing means so as to apply the known pressure to the pressure sensing means, obtaining a reading from the pressure sensing means while the canister is in fluid communication therewith, and comparing the reading obtained from the pressure sensing means with an expected reading so as to check or calibrate the blood pressure monitor;
- wherein each instance of calibration is carried out with a new said disposable, single use sealed canister.
- View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system comprising:
- a blood pressure monitor including a pressure sensor, a processor, and at least one port in fluid communication with the pressure sensor; and
at least one disposable, single use, sealed canister, the sealed canister containing a known, predetermined, stored pressure;
wherein the canister is directly or indirectly connectable with the port so as to place the canister in fluid communication with the port and apply the known pressure in the canister to the pressure sensor;
the processor being arranged to compare a sensed value supplied by the pressure sensor with an expected value corresponding to the known pressure so as to check or calibrate the blood pressure monitor. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
- a blood pressure monitor including a pressure sensor, a processor, and at least one port in fluid communication with the pressure sensor; and
Specification