SU728858A1 - Apparatus for local hypothermy of hollow organs - Google Patents

Description

The invention relates to medical technology, in particular, to a device for local hypothermia of hollow organs, such as the upper part of the digestive tract, the pelvic organs, and the pancreas, which is used primarily in emergency and emergency medical conditions.

A device for local hypothermia of hollow organs is known, comprising a measuring device, a heat exchanger with an evaporator, a refrigeration unit, a circulating system of a cooled perfusate with a pump, an elastic balloon, and a system for controlling the level, pressure, temperature and flow rate of perfusate 1.

This device is closest to the invention by its technical essence and the achieved result.

However, it has a complex structure.

The aim of the invention is to simplify the design of the device.

This is achieved by the fact that in the proposed device for local hypothermia of hollow organs the mernik and heat exchanger are made in the form of a single-section tank, the dipstick is located inside the tank above the evaporator, and the flowmeter of the flow control system of the perfusate is equipped with a device for sealing the tank interacting with the rotameter float.

In addition, the device for sealing is made in the form of a ring of elastic material.

FIG. 1 shows schematically a device for local hypothermia of hollow organs, a general view with a partial section; in fig. 2 - rotameter longitudinal section.

The device contains meriy 1, heat exchanger 2 with evaporator 3, refrigeration unit 4, circulation system of cooled perfusate with pump 5 and rotameter 6, flexible cylinder 7, level control system with level gauge 8, pressure coitrole system (not shown), control system temperature

The measuring device 1 and the heat exchanger 2 are made in the form of a single-section vessel, with the measuring device 1 being located inside the vessel above the evaporator 3.

Claims (2)

The rotameter 6 has a float 9, a device for sealing the tank, which is made in the form of a ring 10 of elastic material, the ring is installed with the ability to interact with the float 9, and a fitting 11. The upper container nozzle is equipped with an elastic tube 12 for filling and sealing the circulating system fluid and clamp 13, and the lower fitting with a drain tube 14 and the same clamp 13. The heat exchanger 2 is connected via a tube 15 to a pump 5, such as a roller, whose bypass valve has a relief valve 16, and A dual-lumen probe 17 with an elastic balloon 7 No. with a rotameter 6, the latter with a scientific research institute closes the coolant circulation system through a tube 18. The sensor temperature sensor of the latter is mounted in a tee 19. The device works as follows. Through the tube 12, a perfusate is poured into the hydraulic system (for example, an alcohol-water mixture) to the top of the level gauge 8. Then the pump 5 is turned on to rotate the rotor in the direction of arrow A, the air from the cylinder 7 is sucked into the measuring device 1, and from there through the tube 12 to the atmosphere. In this case, at the very beginning of the suction, the float 9 of the rotameter 6 with its lower conical end covers the ring 10, thereby limiting the portion of the system to be emptied from air or liquid. The balloon 7 is tightly wrapped around the probe 17 and introduced into the cooled cavity of the patient, for example, into the stomach. Next, the direction of rotation of the rotor of pump 5 is reversed along arrow B and the cylinder 7 is filled with a predetermined volume of perfusate measured by level gauge 8, while the evaporator 3 remains completely submerged perfusate and retains its heat dissipation characteristics. In a sealed system with a closed two-phase air volume equal to the filling volume of the elastic cylinder and perfusate, which fills the rest of the sealed circulation system, the continuity of the jet is maintained regardless of the specified filling volume of the elastic cylinder, i.e. the measuring device is connected in series to the suction line sealing circulation systems. The included refrigeration unit 4 cools the perfusate using a temperature control system with a tee 19 temperature sensor connected to the compressor drive (not shown) of the refrigeration unit, and maintains the temperature of the perfusate at a predetermined level during the entire hours-long procedure. Equation 8 during the hypothermia process is an indicator of the tightness of the circulatory system, and valve 16 serves to bypass the perfusate in case of pinching the probe 17. At the end of the procedure, the circulation direction is again reversed in arrow A and the clamp 13 is removed from the tube 12. The sump of the perfusate is removed from the cylinder 7 to restore the initial level - the top risks on the level indicator 8, while the float 9 of the rotameter 6 overlaps the ring 10, and the perfusate is completely sucked from the cylinder 7 to the heat exchanger 2 to be able to remove the cylinder from the coolant waiting cavity of the patient. Then the pump 5 and the cooling unit 4 is turned off. If it is necessary to drain the perfusate from the system, the tube 14 is inserted into the corresponding receiving vessel (not shown in the drawing) with simultaneous removal of the clamp 13. The advantage of the proposed device is its simplicity, design while maintaining the tightness of the system, which is very important when operating under conditions ambulance and emergency care. Sealing the measured volume of the perfusate in a single-section vessel under the general structurally simple thermal insulation, the evaporator of such a height that, after filling an elastic cylinder, remains completely submerged and retains the full heat transfer surface in contact with the perfusate, makes it easier, simpler and more compact device design, reduces the total heat transfer area from the outside. The performance of the rotameter in the proposed device completely eliminates the pipeline section with fittings and a valve while maintaining the automaticity of the forced emptying of an elastic cylinder when reversing the flow of perfusate. Compared with the known, the proposed device has less dimensions and weight, and its cost is 4-5 times lower than the consumed power 4 times less, which will allow using the on-board electrical network of vehicles for its power supply and make the operation as efficient and effective as possible. cooling. Claim 1. Device for local hypothermia of hollow organs, containing a measuring device, heat exchanger with an evaporator, cooling unit, circulating system of cooled perfusate with a pump, elastic cylinder, and a system for controlling the level, pressure, temperature and flow rate of perfusate, characterized in that simplifying the design of the device, the measuring device and the heat exchanger are made in the form of a single-section container, the measuring device being located inside the container above the evaporator, and the rotameter of the flow control system of the perfusate is equipped with it to seal the container cooperating with a float rotameter. 2. The device according to claim 1, characterized in that the device for sealing the container is made in the form of a ring of elastic material. Sources of information taken into account in the examination 1. USSR author's certificate No. 281489, cl. A 61 F 7/12, 1967 (prototype).