KR20080007064A - Device for injecting bone cavities with fluid cement, particularly for vertebroplasty or the like - Google Patents

Abstract

An apparatus for injecting a fluid cement into bone cavities is provided to prevent tumor cells from proliferating to adjacent areas by reliably stabilizing defective bones. At least one needle(2) injects a fluid cement into bone cavities which contain biological fluids. The needle includes at least one filling opening(3), which fills the cement fluid from the outside of the bone cavity, and at least one injection opening(4), which injects the cement fluid into the bone cavity. At least one channel(8) extracts the biological fluid from the bone cavity, while the cement fluid is injected into the bone cavity. The channel includes at least one inlet hole(9) and at least one outlet hole(10). The biological fluid is injected from the bone cavity through the inlet hole. The biological fluid is extracted from the bone cavity through the outlet hole. The inlet and outlet holes are arranged to be adjacent to each other in the bone cavity.

Description

DEVICE FOR INJECTING BONE CAVITIES WITH FLUID CEMENT, PARTICULARLY FOR VERTEBROPLASTY OR THE LIKE}

1 is a side view of an element consisting of a device according to the invention.

2 is a partial schematic view of the device according to the invention during insertion of the extraction channel and the closing element.

3 is a partial schematic view of the apparatus of FIG. 2 after the closing element is removed from the extraction channel.

4 is a partial schematic view of the apparatus of FIG. 3 after needle is inserted into the extraction channel to inject cement fluid into the vertebral body and to extract the physiological fluid contained within the vertebral body.

FIG. 5 is a partial enlarged detail view of FIG. 4. FIG.

Explanation of symbols on the main parts of the drawings

2: needle 3: filling opening

4: injection opening 5a: first open end

5b: second end 8: channel

9: inlet opening 10: outlet opening

12: first tubular section 14 second tubular section

15: closing element 16a: first tip portion

16b: second tip 17: fixing means

TECHNICAL FIELD This invention relates to the apparatus for injecting fluid cement into a bone cavity (bone cavity) especially for vertebral body surgery.

As is known, diseases such as osteoporosis, vascular necrosis, bone cancer and the like are pathological disorders that weaken the bone and make it easier for the bone to break and / or collapse.

Such diseases are particularly painful and even dangerous for the affected person, especially if the vertebral body of the vertebrae, which must support the weight of the human body, especially the spine.

Typically, bone cements are used to fix and strengthen weakened bones to treat painful spinal fractures and breaks in other parts of the body, such as the distal and proximal ends of the femur and / or humerus. Minimal invasion therapy is usually chosen to accomplish this.

These therapies consist of injecting bone cements, such as polymethyl methacrylate, into a vertebral body with a specially shaped metal needle into the vertebral body under the combined guidance of diagnostic systems such as CAT and digital fluoroscopy.

Cement is dispersed into the fractured vertebral body to prevent further progression.

It gives more maneuverability to patients who need to alleviate pain and reduce physical activity.

However, these therapies have some disadvantages.

Injecting cement into the cavity in the vertebral body compresses and presses the bone marrow in the cavity, gradually increasing the pressure on the bone marrow and the injected cement.

This procedure is difficult for the operator and painful for the patient.

If too much cement is injected at very high pressures, the bone or bone marrow wall collapses and the cement leaks out of the bone cavity, contaminating other parts of the organism, which in some cases causes very incurable damage.

If there is carcinogenic cells where fluid is injected, more problems can occur because the tumor is dispersed out of the spine by the cement that flows out.

Typically, this procedure is very slow and reluctant and can only be done by a high level of medical personnel.

As an alternative to this treatment, there is a treatment that pre-inserts the inflatable element into the cavity of the vertebral body. By filling such inflatable elements with radiopaque or similar liquid, the bone marrow is pressed against the inner surface of the bone cavity, creating an empty space in the vertebral body.

The inflatable element is then emptied and removed from the spine, and the previously created void space in the spine is filled with bone cement using a syringe or the like.

Basically, this treatment allows bone cement to be injected safely without the risk of spillage, since the bone marrow is compressed by the expandable element rather than by the cement.

However, it should be noted that inflating the elements is an additional task of prolonging the time for treatment.

In addition, these therapies also have the same disadvantages as described above, which are basically difficult to treat, painful for patients, risk of cancer cells spreading out of the spine, and high levels of medical personnel Of course it is necessary.

It is a primary object of the present invention to provide an apparatus and method for injecting fluid cement into a bone cavity, especially for vertebral anotomy, etc., which overcomes the problems of the known art with a simple, reasonable and cost effective solution.

Another object of the present invention is to treat the above-mentioned diseases in a condition that is fast, easy and practical for the operator, and in a state of maximum safety and minimum anxiety for the patient.

Another object of the present invention is to stabilize diseased bones and prevent tumor cells from dispersing.

These objects are devices for injecting fluid cement into a bone cavity, particularly for vertebral anotomy, etc., comprising at least one needle for injecting cement fluid into a bone cavity containing a physiological fluid, wherein the needle, At least one filling opening for filling said needle with said cement fluid outside said bone cavity, and at least one injection opening for injecting said cement fluid into said bone cavity. An apparatus, comprising: at least one channel for extracting the physiological fluid from the bone cavity while injecting the cement fluid into the bone cavity, the channel including at least one for introducing the physiological fluid from the bone cavity One inlet opening, and the physiological fluid from the bone cavity A device for injecting fluid cement into the bone cavity, characterized in that it comprises at least one outlet opening for outflowing the sieve, wherein the injection opening and the inlet opening can be positioned substantially adjacent to each other in the bone cavity. Is achieved by all.

These objects are also directed to a method for injecting fluid cement into a bone cavity, in particular for vertebral anotomy or the like, comprising inserting at least one channel into the bone cavity for extracting physiological fluid contained within the bone cavity, cement Inserting at least one needle into the bone cavity for injecting fluid, and injecting the cement fluid into the bone cavity through the inserted needle, and simultaneously introducing the physiological fluid through the inserted channel into the bone cavity Totally achieved by a method for injecting fluid cement into a bone cavity, comprising extracting from the cavity.

Additional features and advantages of the invention are preferred but not exclusive embodiments of an apparatus for injecting fluid cement into a bone cavity, particularly for vertebral anotomy, etc., which are described by way of example and not by way of limitation in the accompanying drawings. It will be more apparent from the detailed description.

Referring to the accompanying drawings, in particular for vertebral anotomy, etc., the device for injecting fluid cement into the bone cavity is indicated generally by the numeral 1.

The device 1 comprises a needle 2 for injecting a cement fluid F into a bone cavity C comprising a physiological fluid M.

Specifically, the cement fluid F is bone cement, for example methacrylic acid polymethyl resin, and eventually radiopaque or other similar material.

In a particular form of the embodiment of the invention shown in the figures, the bone cavity C is an empty space formed in the cylindrical body of the vertebrae V, and the physiological fluid M is normally contained within the bone cavity C ( Blood, bone marrow, etc.).

However, it does not exclude the possibility that the present invention can be used to inject cement fluid F into bone cavities C of different shapes or properties.

Preferably, the needle 2 may be located in the filling opening 3 through which the cement fluid enters the needle 2 outside the bone cavity C, and in the bone cavity C and for injecting the cement fluid F. It has an injection opening 4.

In detail, the needle 2 has a first open end 5a, the edge of the first open end 5a forming the injection opening 4, the first open end being the physiological of the spine V. It has the same shape as the end of the flute in order to simplify the penetration into the fluid M.

On the opposite side of the first end 5a, the needle 2 has a second open end 5b which is also open, which forms a filling opening 3, which filling cement 3 contains cement fluid. Connecting means 6 for connecting to the tank 7.

For example, the tank 7 consists of the body of the syringe, and the injection end of the syringe can be combined with the connecting means 6 of the needle 2, preferably in the form of a thread.

However, it should not be excluded other forms of embodiment in which the filling opening 3 of the needle 2 can be connected to other devices for injecting cement fluid, for example guns, bellows and the like.

The device 1 according to the invention also comprises a channel 8 for extracting the physiological fluid M from the bone cavity C of the vertebrae V while the cement fluid F is injected into the cavity.

Specifically, the channel 8 includes an inlet opening 9 through which the physiological fluid M contained in the bone cavity C can enter, and an outlet opening for taking out the physiological fluid M out of the bone cavity C. (10).

The injection opening 4 of the needle 2 and the inlet opening 9 of the channel 8 can be located adjacent to each other in the bone cavity C.

In practice, the needles 2 and the channels 8 are longitudinally coupled, lying inside each other and lying substantially coaxially.

In a particular form of the embodiment shown in the figure, the transverse size of the needle 2 is smaller than the transverse size of the channel 8, and after the channel 8 is located in the vertebrae V, the needle 2 It can be inserted into the channel 8.

In this way, when the needle 2 is inserted into the channel 8, a gap 11 is formed between the inside of the channel 8 and the outside of the needle 2, through which the physiological fluid ( M) exits the bone cavity (C) of the spine (V).

However, other ways of practicing the invention are possible, for example, the transverse size of the channel 8 may be smaller than the transverse size of the needle 2, in which case the channel 8 is the needle 2. ), A gap is formed between the inside of the needle 2 and the outside of the channel 8, through which the cement fluid F can be injected into the bone cavity C.

Specifically, the channel 8 comprises a first rigid longitudinal tubular section 12, the tubular section 12 being opposite to the first open end 13a and the first open end 13a. It has a second open end 13b located at.

The first open end 13a forms an inlet opening 9 shaped like the end of the flute to facilitate the insertion of the channel 8 into the spine V.

The needle 2 is substantially longer than the first tubular section 12 and can be inserted into the first tubular section 12 to reach the operating position through the second open end 13b and in the operating position The first end 5a projects slightly from the first open end 13a.

The channel 8 also includes a second rigid tubular section 14 coupled in fluid communication with the first tubular section 12 at a right angle, the free end of the second tubular section 14 being open. And form an outlet opening 10 for the physiological fluid M coming from the bone cavity C.

Preferably, the device 1 also comprises a closing element 15 which closes the inlet opening 9 of the channel 8, so that the channel 8 allows the patient's human tissue to enter the channel during insertion. It can be inserted into the bone cavity C without filling.

In particular, the closing element 15 consists of a rod which can be inserted exactly in the first tubular section 12 of the channel 8 and has a length substantially the same as the first tubular section.

The rod 15 includes a first tip 16a shaped like the end of the flute so that it can be coplanar with the edge of the first open end 13a. On the opposite side of the first tip portion 16a, the rod 15 is provided with a second tip portion 16b on which a fixing means 17 is mounted for fastening to the second open end 13b of the first tubular section 12. Include. The securing means is preferably in the form of threads.

It has actually been found that the above-described invention achieves the intended purpose.

The present invention described above may be modified and changed in various ways, all of which are within the scope of the inventive concept. In addition, all details may be substituted for others that are technically equivalent.

Indeed, the materials, shapes and sizes used may be anything as per the requirements without departing from the protection of the following claims.

According to the apparatus and method for injecting fluid cement into a bone cavity, in particular for vertebral anotomy, etc. of the present invention, a simple, reasonable and cost effective solution is presented, and it is quick, easy and practical for the operator, In the state of maximum safety and minimal anxiety, the above-mentioned diseases can be treated, stabilizing the diseased bones, and tumor cells are not dispersed.

Claims (24)

Especially for vertebral anotomy, etc., a device for injecting fluid cement into a bone cavity, At least one needle for injecting cement fluid into the bone cavity containing the physiological fluid, Said needle including at least one filling opening for filling said needle with said cement fluid outside said bone cavity, and at least one injection opening for injecting said cement fluid into said bone cavity, An apparatus for injecting fluid cement into a bone cavity, At least one channel for extracting the physiological fluid from the bone cavity while injecting the cement fluid into the bone cavity, The channel comprises at least one inlet opening for introducing the physiological fluid from the bone cavity and at least one outlet opening for outlet of the physiological fluid from the bone cavity; The injection opening and the inlet opening can be located substantially adjacent to each other in the bone cavity Apparatus for injecting fluid cement into the bone cavity, characterized in that. The method of claim 1, And the needle and the channel can be longitudinally coupled to each other. The method of claim 2, And said needle and said channel can be coupled to either interior of either. The method of claim 3, Wherein said needle and said channel can be coupled substantially coaxially inside either one of the two. The method of claim 3, The lateral size of the needle is smaller than the lateral size of the channel, the needle can be inserted into the channel, and between the inside of the channel and the outside of the needle inserted into the channel, the physiological fluid A device for injecting fluid cement into a bone cavity, characterized in that a gap is formed which can emerge from the bone cavity. The method of claim 3, The transverse size of the channel is substantially smaller than the transverse size of the needle, the channel can be inserted into the needle, between the interior of the needle and the outside of the channel inserted into the needle, the cement fluid A device is provided for injecting fluid cement into a bone cavity, wherein a gap is formed through which the cavity can be injected into the bone cavity. The method of claim 1, The channel includes at least one rigid tubular section, the tubular section comprising a first open end defining the inlet opening, and a second open end positioned opposite to the first open end. Apparatus for injecting fluid cement into the bone cavity, characterized in that. The method of claim 7, wherein And the channel comprises at least one second rigid tubular section transversely coupled to the first tubular section and including the outlet opening. The method of claim 1, And at least one closure element for closing the inlet opening. The method of claim 9, And the closure element comprises at least one rod that can be accurately inserted into the channel. The method according to claim 7 or 10, And the rod has a length substantially the same as the first tubular section. The method according to claim 7 or 10, The rod comprises at least one first tip portion which may be located in substantially the same plane as the edge of the first open end, and at least one second tip portion with fastening means for fixing to the second open end. And a device for injecting fluid cement into the bone cavity. The method of claim 12, And said securing means has a threaded form. The method of claim 7, wherein The needle is substantially longer than the first tubular section and is inserted into the first tubular section through the second open end and can protrude from the first open end. Device for infusion. The method of claim 1, The needle includes a first open end defining the injection opening and a second open end equipped with connecting means for forming the filling opening and for connecting to a tank comprising the cement fluid. Apparatus for injecting fluid cement into the container. The method of claim 15, And said connecting means is in the form of a thread. The method according to any one of claims 7, 12 and 15, At least one of the first open end of the first tubular section, the first tip of the rod, and the first end of the needle is shaped like the end of a flute Apparatus for injecting fluid cement into the container. The method of claim 1, And the cement fluid is methacryl polymer and copolymer bone cement. The method of claim 1, And the cement fluid is in radiopaque form. In a method for injecting fluid cement into a bone cavity, particularly for vertebral body surgery, Inserting at least one channel into the bone cavity for extracting a physiological fluid contained within the bone cavity; Inserting at least one needle into the bone cavity for injecting cement fluid, and Injecting the cement fluid into the bone cavity through the inserted needle and simultaneously extracting the physiological fluid from the bone cavity through the inserted channel Method for injecting fluid cement into the bone cavity comprising a. The method of claim 20, And said inserting said at least one needle is performed after inserting said at least one channel. The method of claim 21, And inserting the at least one needle into the needle cavity into the channel inserted into the bone cavity. The method of claim 20, Inserting the at least one channel is performed after inserting the at least one needle. The method of claim 23, wherein Inserting the at least one channel comprises introducing the channel into the needle inserted into the bone cavity.

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