FR2465463A1

FR2465463A1 - Detecting onset of hypoglycaemic coma - using perspiration sensor switch comprising copper wires attached to skin by bandage and connected to bell circuit

Info

Publication number: FR2465463A1
Application number: FR7924140A
Authority: FR
Original assignee: Individual
Current assignee: Individual
Priority date: 1979-09-24
Filing date: 1979-09-24
Publication date: 1981-03-27
Also published as: FR2465463B1

Abstract

Diabetics who are subject to hyperglycemic comas are warned of the onset by an increase in perspiration. This is a danger at night when the patient may pass into a coma and not be awakened. A perspiration detector comprises a probe assembly including two parallel copper wires with rounded ends and which are mounted in an insulating material. This is maintained in position on the skin by a bandage. The wires are connected in series with a potentiometer and resistor to the base of a common collector transistor circuit comprising three transistors. The transistors close a bell circuit powered from a common battery. A lamp enables the battery condition to be verified.

Description

DESC1tIPTION
La présente invention concerne plus particulièrement les diabétiques sujets aux comas hypoglycémiques.DESC1tIPTION
The present invention relates more particularly to diabetics subject to hypoglycemic comas.

Actuellement seule la sensation de malaise et l'apparition d'une transpiration abondante permet d'alerter le malade ou ses proches d'une hypoglycémie, préface d'un coma si le sujet n'absorbe pas de glucose. La nuit trop de ces personnes sous insuline passent directement de l'hypoglycémie au coma sans être réveillées. Seul, le hasard fait parfois coïncider le phénomène avec la sonnerie d'un réveil monté au juger le soir précédent. Dans les milieux hospitaliers les rondes de nuit fréquentes de la garde constituent la seule sécurité. Currently only the feeling of malaise and the appearance of profuse sweating can alert the patient or his loved ones of hypoglycemia, preface to a coma if the subject does not absorb glucose. At night too many of these people on insulin go directly from hypoglycemia to coma without being awake. Alone, chance sometimes makes the phenomenon coincide with the ringing of an alarm clock fitted to judge the previous evening. In hospitals, frequent night patrols are the only security.

Le dispositil suivant l'invention permet d'éviter cet inconvénient : l'apparition de transpiration assure la fermeture d'un circuit électronique maintenu en état d'alerte qui déclenche une sonnerie continue capable de réveiller le malade ou un proche ce dernier pouvant se trouver dans une autre pièce. Il est également utilisable en milieu hospitalier. The device according to the invention makes it possible to avoid this drawback: the appearance of perspiration ensures the closing of an electronic circuit maintained in a state of alert which triggers a continuous ringing capable of waking the patient or a loved one, the latter being able to be in another room. It can also be used in hospitals.

Le dispositif objet de l'invention dont le dessin annexé (échelle
un-demi, illustre à titre d'exemple un mode de réalisation Fig.4,a ici une masse de 325 g pile comprise. Outre la pile 1 de 4,5 volts alimentant un circuit de commande et un circuit d'utilisation, il comporte un interrupteur 2. Le circuit de commande comprend extérieurement au bottier 17 : un contacteur 10 constitué dans une réalisation Fig. 2 de deux fils de cuivre parallèles, dans une autre de deux électrodes à têtes rondes
Fig.3 qui traversent une matière isolante 13 avant leur connection aux fils fins 9 reliés au bottier 17 par deux fiches amovibles. Dans le modèle présenté Fig.4 le contacteur 10 est maintenu en place sur le front du malade par un bandeau 15 mais tout autre moyen de fixation peut être envisagé même en un lieu différent.Dans le bottier 16cm Xllem X3,5Cm sur le modèle présenté mais qui peut être réduit, le circuit de commande sc prolonge par un potentiomètre 4 monté en résistance variable, une résistance 5, trois transistors 6,#,8 de type N montés à collecteurs communs
capables d'ouvrir et de fermer le circuit d'utilisation et ainsi de faire retentir la sonnerie électrique interne 3 à travers la fenêtre 18.The device which is the subject of the invention, the attached drawing of which (scale
one-half, illustrates by way of example an embodiment Fig.4, here has a mass of 325 g including battery. In addition to the 4.5-volt battery 1 supplying a control circuit and a use circuit, it includes a switch 2. The control circuit comprises, externally to the case 17: a contactor 10 formed in one embodiment FIG. 2 of two parallel copper wires, in another of two round head electrodes
Fig.3 which pass through an insulating material 13 before their connection to the fine wires 9 connected to the case 17 by two removable plugs. In the model shown in Fig.4 the contactor 10 is held in place on the patient's forehead by a band 15 but any other means of attachment can be envisaged even in a different place. In the case 16cm Xllem X3,5Cm on the model presented but which can be reduced, the control circuit sc extends by a potentiometer 4 mounted in variable resistance, a resistance 5, three transistors 6, #, 8 of type N mounted with common collectors
able to open and close the operating circuit and thus sound the internal electric buzzer 3 through the window 18.

Le dispositif suivant l'invention permet deux vérifications à l'aide d'une lampe amovible 11 : au niveau des fiches 12 le contrôle de l'état de la pile, et au niveau des vis des fiches 16 la vérification des circuits (la sonnerie retentit). De plus un peu de salive sur un doigt au niveau du contacteur 10 permet de tester le bon fonctionnement de lten- semble. The device according to the invention allows two verifications using a removable lamp 11: at the level of the plugs 12 checking the state of the battery, and at the level of the screws of the plugs 16 checking the circuits (the buzzer sounds). In addition, a little saliva on a finger at the level of the contactor 10 makes it possible to test the proper functioning of the assembly.

Le dispositif objet de l'invention peut être utilisé pour déceler chez des particuliers, dans les laboratoires ou dans l'industrie la présence de liquidesmême faiblement ionisés. The device which is the subject of the invention can be used to detect in individuals, in laboratories or in industry the presence of liquids, even weakly ionized.

Une application primordiale est son utilisation par les diabétiques chez eux ou au cours d'un séjour à l'hôpital. A primary application is its use by diabetics at home or during a hospital stay.

Claims

1 .DICiSTION-S

1. Electronic device with variable sensitivity allowing revere

ler by audible alert the appearance of sweat on the surface of the

skin.

Characterized by the fact that it is autonomous.

2. Device according to claim 1

Characterized by the fact that it includes a power supply

in direct current by battery.

3. Device according to claim 1.

common commanding a ringtone.

Characterized by an assembly of three collector transistors

4. Device according to claim 1

Characterized by the fact that a potentiometer adjusts the sensitivity

of the device.

5. Device according to claim 1.

by sweat.

Characterized by the existence of a contactor which closes

6. Device according to claim 1

Characterized by ~ the fact that several contactors can

be connected to the same circuit.

7. Device according to claim 1.

remote operation.

connect the contactor wire and the electronic shoemaker for a

Characterized by the fact that an ordinary wire extension can

8. Device according to claim 5

Characterized by the fact that the electrodes are directly

in contact with the skin.

9. Device according to claim 5

Characterized by the fact that the maintenance of the contactor is

almost zero.

10. for main use the device is capable of revealing the

presence of other liquids, even weakly ionized.