SU1243692A1 - Apparatus for continuous of recording uterine contractions - Google Patents

Description

one

The invention relates to medical technology, in particular to devices for monitoring and studying the contractile function of the uterus during childbirth.

The aim of the invention is to eliminate the loss of information in the process of the continuous recording of uterine contractions during labor. .

The drawing shows the structure of the device.

The proposed device contains uterine contraction sensor 1, amplifier 2, recorder 3, first threshold device 4, second threshold device 5, element 6, elektropropnevmatichesky transducer 7, source 8 of increased air pressure, inflatable chamber 9, c 10;

A device for continuous recording of uterine contractility works as follows.

The uterine contraction sensor 1 is installed on the abdominal wall of the parturient (it is fastened without effort). When the sensor 1 is in contact with the woman's body at the output of amplifier 2, the voltage increases. The first threshold device 4 is set up in such a way that its operation is ensured, i.e. the appearance at its output of a voltage corresponding to the level of a logical unit when the sensor 1 pilot is in contact with the body. The threshold, the response of the second threshold device 5 is higher than the threshold for triggering the first threshold device, and the second threshold device is realized. Thus, when the voltage at its input is less than the threshold, its signal is set to logical 1. As a result, after installing sensor 1, the signal of logical 1 is set at the output of the first threshold device 4 and the log signal at the output of the second threshold device 5 1 hedge 1. Accordingly, at the output of the element 6, the level of logic 1 is established. From the output of the logic circuit 6, the signal of logic 1 is fed to the control input of the electropneumatic converter 7, the converter 7 is activated. ive an electromagnet controlled valve opens, and air from the air 8 source 8 enters the inflatable

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chamber 9 "A change in the volume of the inflatable chamber 9 leads to tension on ca 10 and results. increase in the force of pressure of the pelot of the sensor 1 to the patient's abdomen," when this force reaches a predetermined level determined by the threshold of the second threshold

device 5, then a logical 9 signal arises at the output of this device. Therefore, a logical o signal also occurs at the output of element 6 and, as a result, the electropneumatic transducer 7 is turned off and air enters into

the inflatable chamber 9 is terminated. Thus, a predetermined initial interaction of the sensor peloch 1 with the surface of the woman's abdomen is automatically established. Subsequently, during the generic process, due to a change in the volume of the abdomen, the conditions for the interaction of the sensor with the bio-volume change. This affects the force of the pelota to the body. When the driving voltage of the amplifier 2 decreases to a level less than the threshold, the second threshold device 5 triggers, this causes the triggering time of the threshold device 5 and

at its signal output, the log of the log is 1. So. the corresponding signal appears. logical 1 at the output of the circuit And 6 leads to the operation of the electropneumatic transducer 7, which

It provides air from the source 8 of the increased air pressure to the inflatable chamber, chamber 9. An additional increase in the volume of chamber 9 restores the pressing force

sensor 1 to the belly of the woman to the initial level. In this case, the output voltage of the threshold device 5 changes and becomes equal to zero. The output of the logic circuit And 6 due to

this is also set to a logic level O, the Electropneumatic Converter 7 is turned off, and the air supply to the inflatable chamber 9 is stopped. As a result, further registration of uterine contractions is carried out at the restored initial level of pressure of the sensor to the patient's body5, which ensures continuous data acquisition without

teri information. In this case, the decryption of information can be performed in real time automatically using the tools of your computer.

numeral technology. When the sensor is removed from the pregnant woman's abdominal surface, due to the disconnection of its interaction with the body, the level of the output voltage of amplifier 2 decreases sharply and becomes lower than the threshold of the first threshold device 4. A logic signal O appears at its output, and device 5, a signal of logical 1 appears. As a result, the output voltage of the element 1 and 6 is preserved, the output voltage.

Editor T. Parfyonov Order 3732/3

Compiled by A, Nasokin Tehred L. Oleinik

Circulation 660 VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d.

Production and printing company, Uzhgorod, st. Project, 4

436924.

corresponding to the logic 0, the electro-pneumatic converter 7 remains in the off state,. in this case, overfilling of chamber 9 with air is also prevented.

The use of the device in obstetric clinics of maternity hospitals allows to improve the diagnosis of pathological cocTOffHwA to thereby increase the efficiency of medical care for mothers and reduce the number of complications that occur during childbirth

Proofreader L. Patay Subscription

Claims (1)

DEVICE FOR CONTINUOUS REGISTRATION OF UTERINE ABBREVIATIONS, containing a uterine contractions sensor with a belt for fastening on the patient’s body, connected to the amplifier input, to the output of which a recorder and threshold device are connected, characterized in that, in order to avoid information loss during continuous registration, it additionally introduced a second threshold device, an And element, an electro-pneumatic converter, a source of increased air pressure and an inflatable chamber, the second threshold device being input connected to the output of the amplifier, and the output to the first input of the element And, the second input of which is connected to the output of the first threshold device, the output of the element And is connected to the control input of the electro-pneumatic converter, the other input of which is connected to the source of high air pressure, and the output to the inflatable chamber fixed on the inside of the belt. Sk