SU858839A1 - Apparatus for introducing drug solutions into bone and soft tissues - Google Patents

Description

(54) DEVICE FOR THE INTRODUCTION OF MEDICINAL AND SOFT TISSUES

one

The invention relates to medical technology, namely to orthopedics and traumatology.

A device for injecting medicinal solutions into bone and soft tissues is known, comprising a housing with a tubular needle, a choke for feeding solutions and mandrin with a tapered stopper and a handle mounted rotatably around the p axis.

However, the known device does not allow long-term continuous administration of the drug solution without changing the interstitial pressure.

The purpose of the invention is to provide long-term continuous administration of the drug solution without changing the interstitial pressure.

This goal is achieved by the fact that the conical tube of the mandrel is made with a longitudinal groove and located perpendicular to it, narrowing the capillary gap, the mandrel with the needle forms a hydraulic choke with a flow area equal to the cross section of the longitudinal groove. In addition, the depth of the capillary gap increases from 0.001 mm to 0.5 mm, and the depth of the longitudinal groove from 0, 1 to 0.5 mm.

Moreover, the device is made of bimetallic, mandrin is made

to predominantly carbon steel, and the needle is predominantly nickel-chromium alloy.

FIG. 1 shows a device for administering drug solutions.

1 in bone and soft tissues, general view in section; in fig. 2 - mandrin with a tapered plug and handle; in FIG. 3, section A-A in FIG. 2; Fig.4 device with a drill; Figure 5 drill, general view.

Claims (3)

A device for introducing medicinal solutions into bone and soft tissues consists of body 1, rigid BONE SOLUTIONS 8 tubular needles 2 attached to it and fitting 3, which are detachably connected to a reservoir containing the medicinal solution. A mandrel 4 with a conical stopper 5 and a handle 6, mounted rotatably around an axis, is placed inside the case. A longitudinal groove 7 and a capillary slot 8 arranged perpendicular to it are applied to the surface of the cone of the mandrel. The housing 1 with the needle 2 and the mandrel with the conical stopper placed in them, respectively, seals the nut 9 with the gasket 10. serving for the convenience of: work with the device. Drill 12, placed inside the housing, consists of a head 13 and a rod 14 with a drill-like sharpened end. The device is used as follows. When the needle 2 is inserted into the bone tissue and the soft tissue surrounding it, a drill bit 12 is inserted into the body 1. The rod 14 is placed in the needle 2 and the head 13 is fixed to the drill. After inserting the needle 2 into the bone tissue, the drill bit 12 is replaced with a mandrel with a conical stopper, then a nut 9 with a gasket 10 is put on the handle 6 and tightly attached to the body. The nozzle 3 is then connected to a reservoir containing the drug solution. Turning the handle 6 clockwise allows you to adjust the dose of the solution entering the soft tissue. The introduction of the medicinal solution is completed when the reservoir still contains a certain amount of the medicinal solution, which improves the tightness of the device and protects the patient's body from accidental additional infection. When the material necessary for the study is removed from the center of inflammation of the bone tissue with the help of the handle 6, the conical tube 5 is turned to the capillary slot 8. The tank containing the medicinal solution is replaced with a vacuum vessel and the required amount of the test material is sucked out. As a result of this structural embodiment of the device, a long-term, uninterrupted administration of the drug solution is provided without changing the interstitial pressure. Claim 1. Device for injecting medicinal solutions into bone and soft tissues, comprising a housing with a tubular needle, a fitting for summing solutions and mandrels with a tapered plug and a handle mounted rotatably around an axis, characterized in that long-term, continuous administration of the drug solution without changing the interstitial pressure; a longitudinal groove is made on the conical tube of the mandrel and a longitudinal groove located perpendicularly to it, oh form hydraulic choke flow area equal to the cross section of the longitudinal groove. 2. The device according to claim 1, about 1 ton and which is such that the depth of the capillary gap increases from 0.001 mm to 0.5 mm, and the depth of the longitudinal groove from 0.1 to 0.5 mm. 3. The device according to claim 1, which is made of bimetallic, and the mandrel is made mainly of carbon steel, and the needle is mainly of nickel-chromium alloy. Sources of information taken into account during the examination 1. I. Mukhina. and Kotlakova L.T. New needle design for direct. lymphography. - Medical equipment, 1968, No. 6, p. 45. / F