KR950006144B1 - Intramedullary catheter - Google Patents

Abstract

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Description

[Name of invention]

Intracatheter catheter

[Brief Description of Drawings]

1 is a cross-sectional view fragmentally dissecting the janggolreung with the embedded intracatheter of the present invention.

2 is a cross-sectional view of the intraocular catheter of the present invention.

3 is a plan view of an intracatheter catheter head taken along line 3-3 of FIG.

4 is a front view of the intraocular catheter of the present invention with a seal mechanism arranged in an exploded manner.

Detailed description of the invention

[Field of Invention]

The present invention relates to a device for administering a fluid to the vascular system through a bone marrow cavity, a method for embedding into such a device, and a method of using such a device. In particular, the device includes an intracatheter catheter embedded within the bone and covered by the skin and providing an approach for the administration of fluid through the bone marrow into the vascular system.

[Field of Invention]

Intravenous devices are commonly used to administer liquids of drugs directly to the vascular system. For most inpatients, intravenous devices are suitable that provide the surgeon with an easy approach to the vascular system for the administration of such fluids. The advantages of a well-injected device for rapidly throwing drugs into the vasculature are evident, but there are many disadvantages.

In the use of intravenous injection devices, for example, transmission of surrounding tissues (celulitis and systemic infections (bacteremia) can often occur. The transmission of drugs from accidents outside the vein also occurs from time to time The biggest problem with these intravenous devices is the procedure itself involved in inserting them. It is difficult, and when a doctor or nurse attempts to find a vein, detecting the subcutaneous area makes the patient more likely to feel pain. do.

As a solution to the well-known drawbacks of conventional intravenous injection devices, several alternative systems have been developed. One such device is the Hitchman Broviac silastic catherter, which is usually subcutaneous in the neck and inserted into the large vein of the subclavian vein. Other early systems are the Madpot (sold by Norfolk) and Port-a-Kath Inpus-a-port, which must have a cavity structure built under the skin and a self-sealing septum. -cath-Infus-a-port). The drug is injected through a needle inserted into the cavity through the skin and septum. The catheter is guided from the cavity to the vein to administer the drug to the vein.

Such embedded devices are sometimes needed in place of intravenous devices, but many problems still remain. For example, transmission and coagulation in veins and catheters are still major problems. In addition, these internal devices take less time to insert surgery, but it is difficult to embed them in children. In addition, swelling caused by such a built-in device is cosmetically disadvantageous.

Perhaps the biggest difficulty with these visceral devices is that because of the many complications that can occur, many of these viscers must be removed early from the patient. Therefore, although such a device is often needed in place of an intravenous injection device, many problems remain in this built-in device.

The above-mentioned problems are solved a lot by the method and apparatus of the present invention. In other words, the intravenous catheter of the present invention provides a convenient approach to the vascular system without the infection, coagulation, cosmetology and insertion problems associated with intravenous injection devices and such internal devices. Intracatheter catheter of the present invention is particularly suitable when a long-term administration of the patient is required.

Broadly speaking, the present invention relates to an apparatus known as an intraocular catheter or osteoport attached to a bone to provide an approach for administering vascular fluids. The device includes a tubular conduit inserted through a bore in the bone that communicates with the bone marrow cavity. The head is attached to one end of the conduit lying adjacent to the bone so that the surrounding skin can seal the head. Since the head includes a seal mechanism that covers the conduit, insertion of the needle through the seal mechanism will administer the fluid or other drug to the conduit for delivery to the bone marrow. It can be seen that many drugs administered to the bone marrow spread rapidly through the vascular system.

The present invention also relates to a method of administering a fluid or drug to the vascular system of a patient comprising such an intraocular catheter. In a fluid administration method, an intramedal catheter is embedded in the bone into the conduit to connect with the bone marrow by inserting a conduit into the bone by drilling a bore into the bone. Suitably, the bore in the bone is threaded and a portion of the conduit has threads, so the catheter is screwed into the bone. Drugs or other fluids are injected into the catheter through the covered skin for administration to the bone marrow and delivery to the vascular system. The present invention further relates to a method for embedding a drug administration device such as an intraocular catheter of the present invention.

Referring to the drawings, FIG. 1 illustrates an intramedal catheter embedded in an anterior iliac tomb and bone 12 having skin and surrounding tissue 14 covering the catheter. As shown in FIGS. 2-4, the intracatheter catheter includes a wide elongated tubular conduit 16 and a head 18.

As can be seen from FIG. 2, the conduit 16 is in the form of a needle extending to form the passage 20. The exterior of the conduit includes a mechanism for attaching the conduit 16 to bone 12, which includes a threaded portion 22 in a preferred embodiment. The distal end of the conduit 16 (falling off of the head 18) is a simple plane, but may include a sharp point in an alternative embodiment.

The head 18 includes a cylindrical cavity 32 suitably formed with an expanded circular support 30 attached concentrically to the conduit 16. The structure forming the truncated conical bore 34 connects the cavity 32 and the passageway 20. The outer periphery of the base plate 31 includes a plurality of notches 36 (FIGS. 3 and 4) spaced apart from the periphery.

The seal mechanism 40 is fitted in the cavity 30 as shown in FIG. The seal mechanism includes a silicone magnetic sealing film 42 which is auxiliary to be movable within the cavity 32. As can be seen from FIG. 2, the membrane 42 is somewhat larger than the cavity 32, so that the perimeter of the membrane 42 blocks outwards from the center of the membrane 42 as shown in FIG. 2. The base plate 30 forming the cavity 32 is tightly coupled with the inner wall. The annular holding washer 44 is fitted in the annular groove in the support plate forming the cavity 32. Washer 44 covers membrane 42 to keep membrane 42 in position within cavity 32.

The catheter 10 may be embedded in a suitable entrance in the skeleton with the iliac tomb shown in FIG. In the visceral method of the catheter 10, a slight incision in the skin 14 is made in the region of the iliac crest 12 and identifies the iliac crest 12 through the incision. After identifying the long bone, the bore is drilled to connect with the bone marrow cavity through the bone 12 as shown in FIG. Internal threads are formed in the iliac crest 12 using thread sizes and tab mechanisms used daily in orthopedics to insert pins into the bone.

The catheter is inserted through an incision in the skin 14 and the distal end of the conduit 16 is disposed in a threaded bore in the iliac tomb 12. At this time, the catheter 10 is screwed into the iliac crest 12 to be fixed in the bone by the threaded portion (22). In a preferred built-in method, the drive tool (not shown) includes four spaced apart protrusions that fit into the catheter 10 and that fit within the notch 36, so that the catheter 10 rotates when the drive tool is rotated. Screw into bone 12.

As shown in FIG. 1, as the catheter 10 is fully inserted into the bone 12, the head 18 is adjacent to the outer surface of the bone 12 and the skin 14 faces the top of the head 18. It is sealed.

Catheter use is to provide a method of administering a fluid to the vascular system via a bone marrow cavity. As used in this application, the term "fluid" is used in a broad sense to include drugs and other dosage forms. To administer the fluid to the catheter 10, a range of skin 14 around the catheter is set and a needle at the end of the conventional venous cannula is inserted through the skin 14 into the membrane 42.

Preferably, the distal end of the needle is inserted through the membrane 42 and positioned within the passage 20 close to the bore 34. Typically, the needle includes a screwed or luer hub that can connect to various external dosing systems. Typically, the needle is connected to the infusion bottle by a conduit.

In use, the drug or other fluid is administered to the bone marrow cavity via the catheter. It can be seen that the drug injected into the bone marrow cavity is quickly absorbed into the bone marrow cavity. In many instances, the drug is rapidly administered to the vasculature through the cavity, such as injecting directly into the vein.

Indeed, the catheter 10 and methods of visceral and use provide many advantages over conventional drug administration procedures. For example, since the catheter 10 is not located intravenously, there is no coagulation problem, and similarly the possibility of transmission is reduced. Once the catheter 10 is inserted, cosmetic damage and occlusion or movement of the catheter 10 hardly occur. The cost of infusion of the catheter is low and can be easily inserted into particularly difficult patients, such as infants and the elderly or long-term care patients. As a result, there is no pneumothorax, as is possible with an intravenous injection device, and no poison is exposed externally from a given position.

In summary, catheter and visceral and drug administration methods provide significant advantages over the prior art. In particular, the catheter and method of the present invention have shown significant progress in patients requiring long-term administration of fluids.

Claims (7)

A catheter attachable to a bone to provide an approach for administering fluid to the vasculature, wherein the catheter is a long tubular conduit 16 that can be inserted into a bore in the bone and the conduit is a bore of the bone 12 A threaded portion 22 connected to a conduit for attachment therein and an end opposite the end of the conduit 16 having one end inserted into the bore to be disposed adjacent to the bone 12 and fluid to the conduit A catheter comprising a head (18) having a silo mechanism (40) covering the conduit (16) into which the needle is inserted to deliver to the bone marrow and spread to the vascular system. 2. A catheter according to claim 1, wherein the screw portion (22) comprises a plurality of threads along a portion of the outer surface of the conduit. 2. The catheter according to claim 1, wherein the head (18) comprises an enlarged circular support dish forming a cavity (32) therein. 4. The catheter according to claim 3, wherein the seal mechanism (40) comprises a plastic self sealing film (42) disposed in the cavity (32) of the head. 5. The catheter according to claim 4, wherein the head (18) includes a washer (44) that contacts the membrane to retain the membrane (42) in the cavity (32). The catheter of claim 1, wherein the head 18 comprises a circular saucer 30 oriented concentrically about the conduit 16 and oriented almost perpendicular to the longitudinal axis of the conduit. Ter. The catheter of claim 1, wherein the head (18) comprises a plurality of spaced notches (36) adapted to engage a tool for screwing the catheter.