RU95105842A - Control unit for infusion solution injection - Google Patents

Abstract

FIELD: medical technology, particularly, devices for drip infusion of different liquids injected into living organism. SUBSTANCE: unit having container with liquid, drip camera with sensing probe for monitoring drop flying, polymeric pipe with electromagnetic clamp, control block consisting of clock-pulse generator, gate signal shaper, and drop flying signal shaper, is supplemented with analyzer of coincidence between prescribed and operating frequencies of drop flying, logic element "AND" having three inputs, and current key, with all these blocks being connected in consecutive order; moreover, first input of analyzer is connected to clock-pulse generator output, second input of analyzer is connected to output of drop flying signal shaper, and third one - to output of gate signal shaper, which in turn is connected to third input of logic element "AND"; clamp is made in form of pressing element having slit for fixation of pipe from one end and two spring-loaded valves arranged in same plane perpendicular to pipe axis and inserted into opposite end of slit; one of valves has symmetrical groove in its central area, with groove width being equal to 2/3 of maximum outer diameter of pipe; end part of second valve having kinematic joint with electromagnet core is inserted into groove and may be moved back-and-forth. EFFECT: reduced influence of technological scatter of infusion pipe dimensions on quality of unit performance, provision for operating reliability and safety, simplified construction of clamp, and reduction of dimensions and weight, as well as of energy consumption.

Claims (1)

The invention relates to medical equipment, is used to control drip infusion of various fluids introduced into a living organism, and allows to exclude the influence on the quality of the device of technological spread of the geometric dimensions of the infusion tube, to ensure reliable and safe operation of the device while simplifying the design of the clamping unit and reducing the overall mass and energy characteristics. The effect is achieved by introducing into the device containing a container with a liquid, a drip chamber with a drop span sensor, a polymer tube with an electromagnetic clamping device, a control unit consisting of a clock generator, an opening signal shaper and a drop span signal shaper, connected in series with a predetermined and working frequency analyzer drops, a three-input circuit AND and a current switch so that the first input of the analyzer is connected to the output of the clock generator, the second input to the output of a splicer of the drop span signal, the third with the output of the opening signal shaper connected to the third input of the And circuit, and the clamping device is made in the form of a clip with a slot for fixing the tube on one side and two spring-loaded valves of the valve plane on the other side aligned in one perpendicular axis of the tube, moreover, one of the valves is made with a symmetrical groove in the center with a width of 2/3 of the size of the maximum external diameter of the tube, in which the end part d is installed with the possibility of reciprocating movement ugogo valve kinematically associated with the core of the electromagnet.