RU2333012C1 - Device for aspiration of liquid contents of cystic formations - Google Patents

Abstract

FIELD: medical equipment.

SUBSTANCE: device for aspiration of liquid contents of cystic formations consists of a piston, case, referring tube, hollow needle and an aspiration tube with an aspiration aperture. The case includes two parts, smooth and ridge one. The referring tube is fixed on the smooth part supplied with a branch pipe for exhaustion. The ridge part incorporates a piston, supplied with a flange to join a syringe. On the distal extremity of the piston the aspiration tube is fixed, with the spring kept by a hollow screw support on one side and a nut fixator on the other side. The screw support has an external threading whereon is screwed the ridge part of the case with a needle where an aspiration tube having a rounded off working end passes. The needle has a section made at an angle of 45-60 degrees to an axis of the needle. The needle passes in the referring tube which has a blind plug with a central round aperture and four additional apertures around it. The needle projects from the referring tube blind plug.

EFFECT: preventing liquids from pouring to surrounding tissues; ruling out damage of tissue of an organ with cystic formation; aspiration of cystic contents and subsequent introduction of sclerosing substances at one manipulation.

1 ex, 1 dwg

Description

The invention relates to medical equipment and can be used to aspirate the contents of cystic formations, in particular in urology, when performing laparoscopic operations.

There are devices for puncture of cavitary formations, for example, puncture needles or trocars (BME, third edition. Editor-in-chief AM Prokhorov, M., Sovetskaya Encyclopedia Publishing House, 1975, v.21, p.228; v.26, p. 693). The closest analogue is a puncture needle having a special steel mandrin, which is introduced along with the needle. Mandrin during the puncture performs the role of a stylet (Komarova B.D. Handbook of the operating and dressing sister, M .: "Medicine", 1985, p.31). But these devices have several disadvantages. First of all, during the puncture of the cystic formation, the expiration of detritus, pus, cystic contents may occur or bleeding may occur. When puncture of the cavity formations, the needle is immersed no more than 0.5-1 cm, as the organ may be wounded by the sharp edge of the needle (Peterson B.E., Chissov V.I., Paches A.I. Atlas of oncological operations. - M .: “Medicine”, 1987, p. 66). In addition, there is a likelihood of damage to the abdominal organs by the tip of the needle when holding the needle through the trocar to a cystic formation inside the abdominal cavity during laparoscopic surgery. In addition to the puncture needle, trocars are used for the purpose of puncture. Troakar - a medical tool for piercing the wall of the abdominal or chest cavity and extract effusion or transudate (Lopatkin N.A., Shevtsova I.P. Operational urology. A guide for doctors. - L. - "Medicine", 1986, p. 195).

The objective of the invention is to provide a device for aspiration of fluid contents from cystic formations.

The technical result is to prevent the outflow of fluid into the surrounding tissue due to the tight junction of the device to the wall of the cystic formation and to prevent damage to the tissue of the organ on which the cystic formation is located due to the blunt end of the suction tube.

The drawing shows a General view of a device for aspiration of the liquid contents of cystic formations.

The device consists of a housing 1, divided into a smooth part 2 and a ribbed part 3, the ribs on which are made to better hold the device in the hands of the surgeon. Inside the ribbed part 3 of the housing 1 there is a spring 4, which is held by a nut 5 on the piston 6. An aspiration tube 7 is attached to the piston 6, the working end of which is rounded and provided with an aspiration hole 8. The aspiration tube 7 passes through a hollow needle 9, which is attached to the ribbed part 3 cases 1. The hollow needle 9 has a slice 10 made at an angle of 45-60 degrees to the axis of the needle. Needle 9 is used to puncture the cystic wall. A guide tube 11 is attached to the smooth part 2 of the housing 1, and a plug 12 is made on the opposite end of the guide tube 11 to the housing 1 and has a circular central hole and four additional holes around the central one, which form a single unit, ensuring the device is sealed to the cystic wall. A hollow needle 9 passes through the hole in the plug 12. The smooth part 2 of the housing 1 is equipped with a nozzle 13 for connecting an electric suction that creates a vacuum in the guide tube 11, which is attached to the cystic wall with a plug 12. The piston 6 is equipped with a flange 14 for connecting the syringe. The nut 5 has a groove 15, which is combined with a pin 16 made on the piston 6. A spring 4 located on the piston 6 is held on the piston 6 by the fixing nut 17 on the piston 6. The spring 4 helps to return the suction tube 7 to the initial position after a cystic puncture.

The advantages of the proposed device:

- the ability to prevent the outflow of fluid into the surrounding tissue due to the suction of the device to the wall of the cystic formation;

- the impossibility of damage to organ tissue, since the working edge of the suction tube is rounded;

- the possibility of aspiration of cystic contents and the subsequent introduction of sclerotic substances in one manipulation.

The device operates as follows. Before the operation, the device is assembled, for this, a nut 5 is installed on the piston 6, the spring 4 is inserted and fixed with a fixing nut 17. The rib part 3 of the housing 1 with the hollow needle 9 is screwed onto the nut, the suction tube 7 passes inside the hollow needle 9. The smooth part 2 of the housing 1 with the guide tube 11 is screwed onto the ribbed part 3 of the housing 1 with the hollow needle 9, which extends inside and protrudes from the plug 12 of the guide tube. After selecting the cyst wall, the surgeon takes the device with three fingers of his right hand. Before introducing the device into the sleeve of the trocar, a hose for electric suction is attached to the nozzle 13. The distal end of the device, consisting of a hollow needle 9 and a protruding part of the suction tube 7, is led directly to the wall of the cystic formation, before the puncture of the cystic formation, a syringe is attached to the flange 14 of the piston 6, which aspirates the cystic contents, introduces and evacuates sclerotizing substances. After puncture of the cystic formation, an electric suction is connected, connected to the nozzle 13, which ensures the suction of the cyst wall to the guide tube 11. Then, with the syringe attached to the flange 14 of the piston 6, the main volume of the cystic formation is aspirated, its volume and nature of the contents are estimated.

An example of a specific implementation. The total length of the device is 380-400 mm. The housing 1 has a diameter of 6-7 mm, the length of the housing 1 is 40-45 mm. The length of the guide tube 11 is 300-305 mm, the diameter is 4.5 mm. The ratio of the guide tube 11 to the needle 9 with respect to the body is 1: 8.

Claims (1)

A device for aspirating the liquid contents of cystic formations, consisting of a piston, a body, a guide tube, a hollow needle and an aspiration tube with an aspiration opening, characterized in that the body consists of two parts - smooth and ribbed; on the smooth part of the housing equipped with a nozzle for suction, a guide tube is fixed; a piston is installed in the ribbed part of the body, equipped with a flange for connecting the syringe, an aspiration tube is fixed at the distal end of the piston, on which a spring is mounted, which is held by a hollow nut on one side and on the other hand by a lock nut; the nut has an external thread on which a ribbed part of the body with a hollow needle is screwed, inside which an aspiration tube has a rounded working end; the hollow needle has a slice made at an angle of 45-60 ° to the axis of the needle, the needle passes inside the guide tube, which has a plug with a central round hole and four additional holes around, while the needle protrudes from the cap of the guide tube.