Method and an arrangement for continuously measuring the partial pressure of a gas in a sample
First Claim
1. An arrangement for continously measuring the partial pressure of oxygen dissolved in blood flowing through muscle tissue which is covered by a skin layer, a combination comprising a support probe having first and second sides which are respectively adapted to engage the underside of the skin layer and the surface of the muscle tissue so that said probe is fixedly held in position against the muscle tissue;
- and a polarographic cell mounted at said second side and having a gas-measuring part adapted to firmly engage said muscle tissue so as to generate a signal indicative of the amount of gas being diffused from said muscle tissue, said probe further including a tubular section connected to said first side thereof, said first side of said probe comprising tapered wall surface portions which diverge in direction from said tubular section towards said muscle tissue so that said tapered wall surface portions are adapted to be positioned in sealing engagement with the underside of said skin layer.
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Accused Products
Abstract
A method and an arrangement for continuously measuring the partial pressure of a gas in a sample, particularly of oxygen dissolved in blood flowing through muscle tissue which is covered by a skin layer, comprises a support probe which is adapted to be positioned intermediate the skin layer and a portion of the sample so that the probe is fixedly held in position against the sample portion. A polarographic cell is mounted on the probe and has a gas-measuring part which is in firm engagement with the sample portion so as to generate a signal indicative of the amount of gas being diffused from the sample portion. The polarographic cell is interchangeably and detachably mounted on the probe so as to facilitate sterilization of the various parts of the arrangement. A plurality of gas-measuring electrodes are utilized in combination with an indicating arrangement to either measure the distribution of the oxygen gas being diffused over an area of the sample portion or to measure the average value of gas being diffused from the latter.
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Citations
13 Claims
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1. An arrangement for continously measuring the partial pressure of oxygen dissolved in blood flowing through muscle tissue which is covered by a skin layer, a combination comprising a support probe having first and second sides which are respectively adapted to engage the underside of the skin layer and the surface of the muscle tissue so that said probe is fixedly held in position against the muscle tissue;
- and a polarographic cell mounted at said second side and having a gas-measuring part adapted to firmly engage said muscle tissue so as to generate a signal indicative of the amount of gas being diffused from said muscle tissue, said probe further including a tubular section connected to said first side thereof, said first side of said probe comprising tapered wall surface portions which diverge in direction from said tubular section towards said muscle tissue so that said tapered wall surface portions are adapted to be positioned in sealing engagement with the underside of said skin layer.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of continuously polarographically measuring the partial pressure of gas in a sample, particularly of oxygen dissolved in blood flowing through muscle tissue which is covered by a skin layer, the method comprising the steps of incising the skin layer so as to form an incision;
- inserting through the incision a probe on one side of which is mounted a polarographic cell, engaging the surface of the muscle with said one side of said probe and said polarographic cell mounted thereon, and engaging the underside of the skin layer with the other side of said probe; and
with the underside of said skin layer engaged by said other side of said probe, and with said one side of said probe and the polarographic cell mounted thereon both engaging said surface of the muscle tissue, using the polarographic cell to generate a signal indicative of the amount of gas being diffused from said surface of the muscle tissue. - View Dependent Claims (12, 13)
- inserting through the incision a probe on one side of which is mounted a polarographic cell, engaging the surface of the muscle with said one side of said probe and said polarographic cell mounted thereon, and engaging the underside of the skin layer with the other side of said probe; and
Specification