RU1807863C - Venous system parameter measuring device - Google Patents

Abstract

The invention relates to medical equipment, in particular to blood pressure measuring devices. The device for measuring the parameters of the venous system contains a base 1, equipped with a vertical rod 2, on which the lifting mechanism 3 of the horizontal platform 4 is mounted, as well as a platform position sensor 5 and an optical blood flow sensor 6, which is fixed on the back of the wrist 8 of the subject and through the switch and the conversion unit is connected to the indicator 9. The lifting mechanism 3 is equipped with horizontal guides for moving the platform 4. 1 zp f-ly, 1 ill.

Description

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The invention relates to medical equipment, in particular to devices for obtaining information from various parameters of the venous system and early diagnosis of cardiovascular diseases.

The aim of the invention is to expand the functionality and improve the accuracy of measurements.

The invention is illustrated in the drawing, which shows a General view of the device in an embodiment of the installation of the sensor on the patient's wrist.

The device comprises a base 1 provided with a vertical rod 2. A lifting mechanism 3 of the horizontal platform 4, which has the ability to move vertically, is fixed on the rod. A sensor 5 for the position of the platform 4 is mounted on the lifting mechanism 3, the working body of which directly interacts with the rod 2. The optical sensor 6 of the bloodstream is fixed with a bracelet 7 on the back of the patient’s wrist 8 and is connected to the indicator 9 through the conversion unit. 3 is provided with horizontal guides 10 providing horizontal displacement of the platform 4.

The device operates as follows.

During measurements, the hand (or foot) of the subject is mounted on a horizontal platform 4. Attaching it with straps is not necessary. The blood flow sensor 6, with a bracelet 7, is fixed on the limb 8 in the vein area.

. In the initial position, platform 4 is set at the level of the patient’s right atrium. .Lift mechanism 3 smoothly moves platform 4 up. At the time of stabilization of the volumetric blood flow, which is determined by the optical sensor 6, the indicator N records the elevation value N according to the readings of the platform elevation sensor 5, which corresponds to the value of the patient's venous pressure.

During involuntary movements of the limb 8 of the patient associated with its raising, the platform 4 moves in the guides 10, while the altitude of the sensor 6 and the examined section of the venous system does not change.

In addition to the value of venous pressure, the device allows you to determine other parameters of the venous system, namely:

- average pressure - pressure in the right atrium;

- dynamic pressure in the examined area;

- lateral pressure in the examined area;

- an indicator of the elastic properties of blood vessels;

- capacitive properties of blood vessels. This is achieved by analyzing a curve obtained from an optical blood flow sensor.

Using the device provides the following benefits. 1. Improving the accuracy of measurements due to the following reasons:

- a stronger signal comes from the blood flow sensor, because it is applied directly to the projection of the vein on any limb of the patient.

- the patient’s limb elevation height is determined directly from the displacement of the working body of the platform position sensor relative to the base bar without any intermediate transformations;

- there is no effect on the pressure readings of the limb attachment elements of the patient, which are not required in this device 5;

- the detection of the pressure sign does not depend at all on the ambient temperature, or on the body temperature, or on the characteristics of the capillary blood flow of the patient.

II. The device allows you to determine various parameters of the venous system, which allows you to significantly expand the functionality of the device, which can be successfully used in intensive care units, intensive care units, outpatient facilities and for mass screenings of the population.

Claims (2)

1. A device for measuring the parameters of the venous system, comprising a base, a platform associated with a lifting mechanism, a position sensor associated with 5 by a platform, and an optical blood flow sensor connected through a switch and a conversion unit to an indicator, characterized in that, in order to increase the measurement accuracy, it is provided with a vertical rod fixed to the base on which the lifting mechanism is mounted, the platform position sensor is made in the form a linear transducer interacting with a boom, 5a, an optical blood flow sensor - with the possibility of fixing it to the wrist. 2. The device according to claim 1, wherein the lifting mechanism is provided with horizontal guides on which the platform is mounted.