RU145795U1 - Cryoapplicator - Google Patents

Abstract

1. A cryoapplicator designed for contact with its response zones with the human head in its frontal, parietal, temporal and occipital parts with the ability to adapt to the shape and size of the head, made in the form of internal heat-conducting and external flexible half-shells, hermetically connected to the shell with nozzles for summing up and removal of the coolant and smoothly curved channels for its circulation, characterized in that the outer half-shell is made of heat-insulating material, and the inner half-shell is provided on the sides s, hermetically connected to the outer half-shell, the protrusions made normal to the surface thereof, forming channels in the form of a two-way spiral, one entrance of which includes the inlet and the other entrance of the outlet coolant nozzle, while the approaches are connected in the parietal part, and the protrusions have inflection points between the frontal and temporal and occipital and temporal zones. 2. The cryoapplicator according to claim 1, characterized in that the protrusions of the inner half-shell forming the channel furthest from the parietal part are provided in the occipital part with alternating mating additional protrusions forming a labyrinth.

Description

The utility model relates to the field of medical technology and can be used in the treatment of emergency conditions associated with the risk of ischemic damage to the structures of the central nervous system after a period of insufficient blood supply, in particular, with clinical death after cardiopulmonary resuscitation, with craniocerebral injuries, strokes, heart attacks, etc.

A device is known for cooling the external integument of the head and brain of a person, comprising at least an applicator designed for contact with a person’s head and adapted to its shape and size, made in the form of a substantially hemispherical hermetic shell with nozzles for supply and discharge refrigerant carrier and channels for its circulation (RF Patent for Utility Model No. 96762, 04/08/2010, published on 08/20/2010, IPC A61F 7/00).

A disadvantage of the known device is its relatively low efficiency, due to the uneven arrangement of the coolant circulation channels in the applicator.

Closest to the claimed technical solution is a cryoapplicator designed for contact with its response zones with the human head in its frontal, parietal, temporal, and occipital parts with the ability to adapt to the shape and size of the head, made in the form of internal and external flexible half-shells, hermetically connected in a shell with nozzles for supplying and discharging a coolant and smoothly curved channels for its circulation (http://www.cmed-plus.ru/atg.html).

The disadvantage of the prototype is its relatively low efficiency, due to the tubular execution of the coolant circulation channels in the applicator, and the complexity of the design, due to the execution of the entire shell of heat-conducting material, which leads to the need to use an additional helmet made of heat-insulating material that minimizes heat exchange of the shell with the environment.

The objective of the utility model is to expand the functionality of the cryoapplicator.

The technical result of the utility model is to increase the efficiency of the cryoapplicator while simplifying its design.

The task and the claimed technical result are achieved by the fact that in the cryoapplicator designed for contact with its response areas with the human head in its frontal, parietal, temporal, and occipital parts with the ability to adapt to the shape and size of the head, made in the form of internal heat-conducting and external flexible half-shells hermetically connected to the shell with nozzles for supplying and discharging the coolant and smoothly curved channels for its circulation, the outer half-shell is made of heat-insulating material, and the inner half-shell is provided on the side of the outer half-shell with protrusions made normal to the surface of the shell, forming channels in the form of a two-way spiral, one entry of which includes the inlet and the other entry of the refrigerant outlet pipe, while the inlets are connected in the parietal part and the protrusions have points inflection between the frontal and temporal and occipital and temporal zones, in addition, the protrusions of the inner half-shell, forming the channel furthest from the parietal part, are provided in the occipital part with alternating and additional projections forming a labyrinth.

The utility model is illustrated by cryoapplicator images:

in FIG. 1 is an isometric view of a cryoapplicator;

in FIG. 2 is an isometric view of the outer casing of the cryoapplicator;

in FIG. Figure 3 shows a plan view of the inner half-shell of the cryoapplicator from the side adjacent to the outer half-shell of the casing;

in FIG. 4 shows a side view of the inner half-shell of the cryoapplicator from the side adjacent to the outer floor of the shell;

in FIG. 5 is a view of the occipital part of the inner casing of the cryoapplicator from the side adjacent to the outer floor of the casing;

in FIG. 6 is an isometric view of the cryoapplicator half shell from the side adjacent to the outer shell floor.

Cryoapplicator 1 (Fig. 1) is made of flexible heat-conducting inner 2 (Fig. 3) and heat-insulating outer 3 (Fig. 2) inserted one into the other half-shells tightly interconnected (for example, glued along the end edges and protrusions). In the prototype cryoapplicator, the semi-rigid urethane Smooth-Cast® 65D (www.smooth-on.com) was used for the outer half-shell, and the injection polyurethane PX 761 (http://www.axson-na.com/TDSs/TDS%) was used 20-% 20PX% 20761.pdf). In the inner half-shell 2 normal to its surface are formed (for example, molding into a mold with the formation, as a whole, half-shells with protrusions) of the protrusions 4, forming smoothly curved in accordance with the shape of the half-shell 2 (and, accordingly, the cryoapplicator 1) inlet and outlet channels 5, which are geometrically the first and second approaches of the two-way spiral. The inlet / outlet approaches / channels are hydraulically connected in the parietal zone of the cryoapplicator 1 (Fig. 3). In the end part of the channels / approaches, nozzles 6 are formed, each of which, like the channels 5, depending on the coolant supply scheme, can perform the function of bringing or removing the coolant to / from the cryoapplicator 1. The nozzles 6 are most convenient both technologically and operationally, form in the temporal zone 9 by forming the floor of the nozzles in each of the floor of the shells (Fig. 1, Fig. 4). As a source of coolant can be used, for example, a refrigeration machine (not shown).

Cryoapplicator 1 includes mating parts in accordance with its fit to the areas of the human head, namely: frontal 7, parietal 8, two temporal 9, and occipital 10.

At the joints of the frontal part 7 with the temporal parts 9 on the one hand and the occipital part 10 with the temporal parts 9 on the opposite side of the inner half shell 2, the protrusions 4 have inflection points 11 (Fig. 6), thus forming at the junctions of these parts with a certain flexibility due to flexibility of the raw material stiffeners 12.

As shown in FIG. 5, the protrusions 4 of the inner half-shell 2, forming the channel furthest from the parietal part 8, in the occipital part 10 are provided with alternating mating additional protrusions 13 forming the labyrinth 14. In places not allowing a more or less uniform cross-section of the channels 5, due to the geometry of the head, it is possible to use additional bends and branches 15.

Cryoapplicator 1 works as follows.

The cryoapplicator is put on the patient’s head. The coolant (for example, a 25% propylene glycol solution) is supplied through one of the nozzles 6, is pumped through the inlet and outlet channels 5, and is discharged through the second nozzle 6.

Moreover, due to the tight fit due to ductile stiffeners in a compartment with an effective arrangement of channels 5, an increase in the efficiency of the cryoapplicator is achieved by 15-20% compared with the prototype (established by mathematical modeling). The high efficiency of the cryoapplicator is also facilitated by the manufacture of the outer shell of a heat insulating material, which in this case also performs the function of a heat shield.

At the same time, the execution of the inlet and outlet channels 5 in a two-way spiral, taking into account the fact that the inner half-shell 2 and the protrusions 4 are formed of the same heat-conducting material, helps to equalize the temperature over the entire surface of the cryoapplicator adjacent to the patient’s head.

Also, the labyrinth 14 (in conjunction with the bends and branches 15) contributes to a more uniform heat dissipation and a more complete coverage of the occipital and, if necessary, cervical area of the patient’s head.

And finally, the proposed cryoapplicator design does not require additional means of regulating its fit to the patient’s head in the form of various laces, etc. and the use of an additional helmet made of insulating material.

Based on the foregoing, we can conclude that the task - expanding the functionality of the cryo-applicator - is solved, and the claimed technical result - increasing the efficiency of the cryo-applicator while simplifying its design - is achieved.

Claims (2)

1. A cryoapplicator designed for contact with its response zones with the human head in its frontal, parietal, temporal and occipital parts with the ability to adapt to the shape and size of the head, made in the form of internal heat-conducting and external flexible half-shells, hermetically connected to the shell with nozzles for summing up and removal of the coolant and smoothly curved channels for its circulation, characterized in that the outer half-shell is made of heat-insulating material, and the inner half-shell is provided on the sides s, hermetically connected to the outer half-shell, protrusions made normal to the surface thereof, forming channels in the form of a two-way spiral, one entry of which includes the inlet and the other entry of the outlet coolant nozzle, while the entrances are connected in the parietal part, and the protrusions have inflection points between the frontal and temporal and occipital and temporal zones. 2. The cryoapplicator according to claim 1, characterized in that the protrusions of the inner half-shell forming the channel furthest from the parietal part are provided in the occipital part with alternating mating additional protrusions forming a labyrinth.