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RU-2861614-C2 - MEDICAL ASSEMBLY COMPRISING INSTRUMENT AND DEVICE FOR KINKING HOSE LEADING TO INSTRUMENT, CONTROLLING FLUID DISCHARGE

RU2861614C2RU 2861614 C2RU2861614 C2RU 2861614C2RU-2861614-C2

Abstract

FIELD: medical equipment. SUBSTANCE: invention relates to a tool for applying a fluid. A medical assembly comprises: a medical instrument (2) comprising a fluid applicator (4) for discharging a fluid jet, a hose (5) extending from its proximal end, connectable to a fluid source (3), to the fluid applicator (4), and a holder (11) located on the hose (5) for holding a loop (12) formed by this hose, having two limbs (13, 14), wherein the holder (11) together with the loop (12) forms a plug; and a hose kinking device (8) comprising a receiving area (16) for receiving the loop (12) of the hose (5), inserted into the receiving area (16) as part of the plug, and an actuator (22) located in the receiving area (16) for controlled deformation and release of the loop (12), wherein the receiving area (16) extends through the actuator (22) such that the actuator (22) can move the limbs (13, 14) of the loop (12) inserted therein towards each other or one limb (14) towards the other limb (13) against the elastic force of the hose (5) for kinking the hose to form a kink closing its lumen. EFFECT: simple construction and discharge of fluid under high pressure in pulses with a steep pressure rise front. 13 cl, 11 dwg

Inventors

  • FEKH Andreas
  • SHTRAUB Frank

Dates

Publication Date
20260506
Application Date
20220805
Priority Date
20210810

Claims (15)

  1. 1. A medical device containing:
  2. - a medical instrument (2) comprising a fluid applicator (4) for releasing a stream of fluid, a hose (5) extending from its proximal end connected to a source (3) of fluid to the fluid applicator (4), and a holder (11) located on the hose (5) for holding a loop (12) formed by this hose, having two branches (13, 14), wherein the holder (11) forms, together with the loop (12), a plug;
  3. - a device (8) for bending a hose, comprising a receiving area (16) for accommodating a loop (12) of a hose (5), introduced into the receiving area (16) as part of a plug, and an actuator (22) located in the receiving area (16) for controlled deformation and release of the loop (12), wherein the receiving area (16) extends through the actuator (22) with the possibility of moving by the actuator (22) the branches (13, 14) of the loop (12) introduced into it towards each other or one branch (14) in the direction of another branch (13) with overcoming the elastic force of the hose (5) for bending the hose with the formation of a break that closes its lumen.
  4. 2. The installation according to claim 1, characterized in that the applicator (4) of the fluid medium is provided with an additional hose (9) connected at its proximal end (9a) to an additional source (10) of the fluid medium.
  5. 3. The installation according to claim 2, characterized in that the additional hose (9) extends from its proximal end (9a) to the fluid applicator (4) without forming kinks or loops.
  6. 4. An installation according to one of the previous paragraphs, characterized in that the loop (12) has a length (L) exceeding its width (B).
  7. 5. An installation according to one of the previous points, characterized in that the branches (13, 14) of the loop (12) are held in the holder (11) parallel to each other.
  8. 6. An installation according to one of the previous points, characterized in that the loop (12) is held motionless in the holder (11).
  9. 7. An installation according to one of the previous paragraphs, characterized in that the holder (11) has at least one connecting means (20, 21) for connecting to the device (8) for bending the hose.
  10. 8. An installation according to one of the previous points, characterized in that the tool (2) is made in the form of a disposable tool.
  11. 9. An installation according to one of the previous paragraphs, characterized in that the receiving area (16) has a slit-shaped cross-section.
  12. 10. An installation according to one of the previous paragraphs, characterized in that the device (8) for bending the hose contains a positioning means (19) for setting the position of the loop (12) relative to the actuator (22).
  13. 11. The installation according to item 10, characterized in that the positioning means (19) is a stop (26) located behind the actuator (22) in the direction of insertion of the loop into the receiving area (16).
  14. 12. The installation according to item 10 or 11, characterized in that the positioning means (19) is an input limiter (18) located in front of the actuator (22) in the direction of insertion of the loop into the receiving area (16).
  15. 13. An installation according to one of the previous paragraphs, characterized in that the device (8) for bending the hose is made in the form of a sterilizable device.

Description

The invention relates to a tool for introducing (applying) a fluid medium, as well as to a device for bending a hose, designed to clamp and release the hose. Publication EP 3714926 A1 discloses an application system for needle-free injection of medical fluids into biological tissue. For this purpose, the instrument is equipped with a first flow channel through which a sharp jet of fluid can be emitted, which serves to create, or open, an injection channel in the tissue. A medical fluid, such as a liquid containing living cells, is introduced through another flow channel at lower pressure, allowing it to penetrate the tissue through the newly formed injection channel. When delivering a sharp jet of fluid, to effectively create an injection channel in biological tissue, it is important that the fluid pressure at the distal end of the instrument increases along as steep a curve as possible at the beginning of the sharp injection jet. This ensures that the created jet immediately develops its full penetrating power, and the amount of fluid trapped in the layers in front of the target tissue, thereby preventing it from reaching the target tissue, is minimized. Publication EP 3040101 B1 discloses a device designed to create the steepest possible pressure rise fronts. Valves are provided to close and open the pressurized flow channels. These valves must be either fully sterilizable or disposable. In any case, regardless of this, such valves must be capable of abrupt opening or closing under significant fluid pressure, up to 100 bar. It is known that so-called pinch valves, also known as pinch valves, are used to open and release flow channels. An example of such a solution is disclosed in US 9,095,656 B2. The pinch valve described in this publication is formed by a section of flexible tubing, i.e., a hose, located within a pressure vessel. This pressure vessel also serves as a source of energy for generating a fluid jet. Due to the location of the flexible hose within the pressure vessel, the pressure inside the hose is always approximately equal to the pressure outside the corresponding line. Therefore, the valve actuator only needs to overcome the restoring force created by the elastic wall of the flexible tubing section. Thus, the forces applied to close the pinch valve are relatively small. The flow channel is opened by the restoring force of the elastic wall, with the fluid pressure making only a small contribution to this process due to the small difference between the pressure inside the flow channel and the pressure outside the hose. This may result in a reduction in the steepness of the pressure rise when the hose valve is opened. So-called kinking hose valves are also known. In this regard, US 2540364 discloses a hose equipped with several finger loops. The operator can insert the thumb and other fingers through these loops and then, with a simple movement of the hand, kink and release the hose. Other mechanized devices for bending and releasing a hose are known from publications GB 1012565, DE 69815825 T2, EP 2133610 A1 or EP 2130562 A2. Publication DE 602004009494 T2 discloses a device that, using two eccentric discs, creates multiple, successive kinks in a hose, forming hose valves. These kinks, or hose valves, are alternately opened and closed by cam discs, allowing fluid to be released from a high-pressure reservoir in small, low-pressure portions. Furthermore, publication US 6,056,260 discloses a simple, electromagnetically actuated, kinks-type hose valve. The invention was based on the task of proposing a solution for a tool and a related hose valve that would allow the release of a fluid medium under high pressure in pulses with a steep pressure rise front and that could be implemented in a technically simple manner. This problem is solved in a medical installation containing: - a medical instrument comprising a fluid applicator for releasing a stream of fluid, a hose extending from its proximal end connected to a source of fluid to the fluid applicator, and a holder located on the hose for holding a loop formed by this hose, which has two branches, wherein the holder together with the loop forms a plug; - a device for bending a hose, comprising a receiving area for accommodating a loop of hose inserted into the receiving area as part of a plug, and an actuator located in the receiving area for controlled deformation and release of the loop, wherein the receiving area extends through the actuator with the possibility of moving by the actuator the branches of the loop inserted into it towards each other or one branch in the direction of another branch with overcoming the elastic force of the hose for bending the hose with the formation of a break that closes its lumen. The instrument comprises a hose (hereinafter also referred to as the first hose) connected to a fluid source (hereinafter also referred to as the first fluid source) for supplying the instrument with high-pressure fluid. This instru