Method and apparatus for "zeroing" and calibrating a catheter-ti

Details Method and apparatus for "zeroing" and calibrating a catheter-ti Method and apparatus for "zeroing" and calibrating a catheter-ti

1985-06-14

1987-06-16

Howell, Kyle L.

Surgery

Truss

Pad

128748, 73 4R, 73740, A61B 502

Patent

active

046729747

ABSTRACT:
Sensitivity or span calibration is adjusted to a desired value by (1) noting the display indication with the reference side of the transducer at atmospheric pressure, (2) substituting a known offset pressure for atmospheric pressure on the reference side, to produce a new display indication, and (3) adjusting the display to produce that amount of displacement (between the display indications in steps 1 and 2) which corresponds to the known offset pressure multiplied by the desired calibration value.
With the sensitivity or span calibration adjusted to a desired value, the zero point of the display is adjusted by (1) independently measuring the mean of the actual pressure, (2) noting the mean value of the display indication, and (3) adjusting the zero point to eliminate discrepancy between the mean value of the display and the mean of the actual pressure.
The apparatus has a port for a substitute reference pressure, and an external pressure gauge for measuring the mean pressure through an auxiliary lumen of the catheter.

REFERENCES:
patent: 3703099 (1972-11-01), Rouse
patent: 3831588 (1974-08-01), Rindner
patent: 3868679 (1975-02-01), Arneson
patent: 3894535 (1975-07-01), Cannon et al.
patent: 4312361 (1982-01-01), Nicholson et al.
patent: 4342218 (1982-08-01), Fox
patent: 4383431 (1983-05-01), Gelernt
patent: 4384470 (1983-05-01), Fore
patent: 4413528 (1983-11-01), Hok et al.

Affiliated with

Also associated with

Rating

Method and apparatus for "zeroing" and calibrating a catheter-ti does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for "zeroing" and calibrating a catheter-ti, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for "zeroing" and calibrating a catheter-ti will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-678036