Device for measuring inspiratory strength
OwnerPhilip Farr, Thomas McCarthyinventors
Life of this patent
Estimating the term…
Abstract
A device having variable inspiratory resistance suitable for measuring the inspiratory strength of a patient which comprises a chamber in communication with a mouthpiece, said chamber (a) being provided with a calibration system for measuring the inhalation flow rate during inhalation through the mouthpiece and (b) being provided with a variable resistance feature by which the resistance to airflow through the device may be altered.
Claims21
1-22. (canceled)
A device having variable inspiratory resistance suitable for measuring the inspiratory strength of a patient comprising:
- an elongate chamber having first and second ends and defining a pathway and adapted for air to enter the second end;
- a calibration system adapted to measure an inhalation flow rate;
- and
- a variable inspiratory resistance system adapted to include at least one specified setting that provides the device with a resistance matching that of an inhalation device.
A device having variable inspiratory resistance suitable for measuring the inspiratory strength of a patient comprising:
- an elongate chamber having first and second ends and defining a pathway and adapted for air to enter the second end;
- a calibration system adapted to measure an inhalation flow rate;
- and
- a variable resistance system adapted to vary the area through which air leaves the chamber at the first end, wherein the variable resistance system includes a co-operating section, with at least one aperture, the outer surface of which section in conjunction with a portion of the inner surface of the chamber defines a ring, the area of which may be altered by rotational movement of the chamber along its longitudinal axis relative to the co-operating section, and wherein at least part of the chamber or co-operating section is tapered.
A device having variable inspiratory resistance suitable for measuring the inspiratory strength of a patient comprising:
- an elongate chamber having first and second ends and defining a pathway and adapted for air to enter the second end wherein the first end of the chamber is in communication with a mouthpiece;
- a calibration system adapted to measure an inhalation flow rate;
- and
- a variable inspiratory resistance system adapted to vary the area through which air leaves the chamber at the first end or enters the chamber at the second end, and further adapted to include at least one specified setting that provides the device with a resistance matching that of an inhalation device.
Dependencies are inferred from the claim text.