US 2013/0085708 A1 · DEVICE AND PROCESS FOR DETERMINING THE BODY CORE TEMPERATURE

Abstract

A device for determining the body core temperature of a living being includes a first temperature sensor (15) for detecting the skin temperature T1, an insulator (11) for receiving the first temperature sensor (15), a second temperature sensor (17) in the insulator (11) for detecting a temperature T2 and a third temperature sensor (19), which is arranged opposite the first temperature sensor (15) at the insulator (11), for detecting a temperature T3 near the environment. Assuming a constant ratio of lateral heat fluxes α at the insulator (11) between the temperature sensors (15, 17, 29), the body core temperature Tcore is determined by the relationship described by the formula T core = T 1 · [ 1 + k s k g  ( 1 + 1 α ) ] - T 2 · ( k s k g + k s + k t α   k g ) + T 3 · k t α   k g in which kg=heat transfer coefficient of the tissue and ks, kt=heat transfer coefficients of the insulator (11).

Claims9

Dependent claims

A device for determining the body core temperature of a living being, the device comprising:

a first temperature sensor for contact with the body surface for detecting skin temperature T1,
an insulator for receiving said first temperature sensor;
a second temperature sensor at said insulator for detecting a temperature T2 in an area of the main heat flux directed from the body surface into said insulator;
a third temperature sensor arranged opposite said first temperature sensor at said insulator, wherein assuming a constant ratio of lateral heat fluxes Q5/Q4=α at said insulator between said first temperature sensor and said second temperature sensor and said second temperature sensor and said third temperature sensor, the body core temperature Tcore is obtained from the relationship described by the formula:
T
core
=
T
1
·
[
1
+
k
s
k
g

(
1
+
1
α
)
]
-
T
2
·
(
k
s
k
g
+
k
s
+
k
t
α


k
g
)
+
T
3
·
k
t
α


k
g
in which
kg=heat transfer coefficient of the tissue of the living being, and
ks, kt=heat transfer coefficients of said insulator between said temperature.

57 more elements

A device for determining the body core temperature of a living being, the device comprising:

an insulator having three spaced apart regions, each of said regions for receiving a temperature sensor;
a first temperature sensor connected to said insulator at one of said three spaced apart regions for contact with a body surface of the living being for detecting a skin temperature T1;
a second temperature sensor connected to said insulator at another of said three spaced apart regions for detecting a temperature T2 in an area of main heat flux directed from the body surface into said insulator;
a third temperature sensor connected to said insulator at a further one of said three spaced apart regions and arranged opposite said first temperature sensor, with said second temperature sensor positioned between said first temperature sensor and said third temperature sensor;
and
a processing device receiving temperature signals from each of said first temperature sensor, said second temperature sensor and said third temperature sensor and providing a body core temperature Tcore by assuming a constant ratio of lateral heat fluxes Q5/Q4=α at said insulator between said first temperature sensor and said second temperature sensor and between said second temperature sensor and said third temperature sensor, obtained from the relationship described by the formula
T
core
=
T
1
·
[
1
+
k
s
k
g

(
1
+
1
α
)
]
-
T
2
·
(
k
s
k
g
+
k
s
+
k
t
α


k
g
)
+
T
3
·
k
t
α


k
g
in which
kg=heat transfer coefficient of tissue of the living being, and
ks, kt=heat transfer coefficients of said insulator between said first temperature sensor and said second temperature sensor and between said second temperature sensor and said third temperature sensor.

59 more elements

Dependencies are inferred from the claim text.

Device and process for determining the body core temperature

Life of this patent

Device and process for determining the body core temperature

Life of this patent

Abstract

Claims9