PubMed HealthSearch

PubMed · 972923

An improved method for detecting passive pills.

Abstract

One of the principal disadvantages of the passive pill as a telemetric method for measuring various physiological parameters has been its resticted range. The reasons for the restricted range with existing detection methods are discussed. An improved method using a locking spectrometer based on third-order phase-sensitive detection is described and its performance is assessed. A significant increase in the usable range of a high sensitivity passive pill is obtained.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

T A Delchar, M J Smith. 1976. An improved method for detecting passive pills.. https://doi.org/10.1088/0031-9155%2F21%2F4%2F009

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

Calibration of ion-selective microelectrodes: flow-system and analysis program for the IBM PC.

A menu-driven program--written in C and Assembly language--has been developed for use with an IBM PC or compatible computer for calibration of ion-selective microelectrodes. Available features include (i) user-logical commands, (ii) rapid, accurate construction and display of calibration curves (fitted by least squares non-linear regression), (iii) analysis of data (stored either on- or off-line), with correction for drift and conversion from voltage or length to ion concentration or activity, (iv) calculation of selectivity coefficients, (v) optional storage and use of activity coefficients, and (vi) output of data, calculations and graphics to printer and plotter. A simple chamber and valve-activated flow-system for rapid change of solutions with either manual selection or computer control is also described.

Microelectrodes

Thermal stability of hydrolic drives.

The thermal stability of hydrolic drives is investigated theoretically and experimentally. A commonly used model is found to have a positive positional temperature coefficient of 7 microns per degrees C at 22 degrees C. A simple temperature compensator is described. This should lead to improved intracellular recording stability when recording from small cells.

Microelectrodes