BONE DUST TRAP

Abstract

The Bone Dust Trap for collecting bone dust during various surgical procedures for subsequent bone graft implantation. The device includes cylindrical housing unit covered with the lid, attached to the central pipe with the porous tip. The pipe connects the cyclone forming mechanism and filtrating membrane, located at the lower part of the central pipe. The membrane interlinks with the plurality of porous plates located along the walls of the cylinder. The cyclone forming mechanism, consisting of the inlet port with conical jet and the spiral helix, creates spiral movement of the incoming fluid. The liquid is further directed towards the 2-stage filtrating system with the said porous plates, where larger bone particles are accumulated, and then to the filtrating membrane, which collects smaller particles. The fluid is extracted through the central pipe. The lid can be removed to collect the bone particles from plates and membrane.

Claims

1. The Bone Dust Trap for collecting bone particles from the patient during surgical procedure comprising of: a cylindrical housing unit having a plurality of porous filtrating plates located along inner walls of the said cylindrical unit; a lid; an o-ring ensuring tightness of the sealed Bone Dust Trap; a cyclone forming mechanism, comprising of a spiral helix and a cylindrical tube with conical jet forming an inlet port; a central pipe with a porous tip for extraction of filtrated fluids; a multi-stage filtrating system, comprising of the plurality of porous filtrating plates and a central filtrating membrane, wherein the said central filtrating membrane is rigidly attached to the said central pipe wherein the said central filtrating membrane includes a plurality of pores for filtrating bone dust and a plurality of slots to interlink with the said plurality of porous filtrating plates, wherein the plurality of slots allows to scrap bone particles from the said plurality of porous filtrating plates as the lid is removed; a porous tip with a plurality of pores, located at the end of the said central pipe under the central filtrating membrane; the inlet port and an outlet port attached to the said lid and shaped conically in order to provide rigid connection with the standard suction tubing.

2. The Bone Dust Trap defined in claim 1 wherein the said inlet port is connected to the suction line and directs incoming from the patient fluid towards the spiral helix, attached to the lid and wrapped around the above mentioned central pipe, wherein a distal part of the said spiral helix is reaching the level of the plurality of porous filtrating plates.

3. The Bone Dust Trap according to claim 1 includes the said cyclone forming mechanism, comprising of the said inlet port wherein the said inlet port is positioned at an angle of between 0 to 90 degrees to the longitudinal axis of the Bone Dust Trap and the spiral helix.

4. The Bone Dust Trap according to claim 1 includes the said multi-stage filtrating system comprising of the said central filtrating membrane and the plurality of porous filtrating plates with plurality of pores for accumulating larger bone particles, whereas the said porous filtrating plates are located along the inner walls of the cylindrical housing unit.

5. The Bone Dust Trap according to claim 1 additionally includes the central pipe for extraction of filtrated fluids, wherein an upper end of the said central pipe is attached to the said lid, and a lower end of the said central pipe ends with the porous tip with the plurality of pores to prevent clogging from blood clots.

6. The Bone Dust Trap according to claim 1 includes the central filtrating membrane, rigidly attached to the lower part of the said central pipe, wherein the said central filtrating membrane includes the plurality of small pores for accumulating smaller bone particles and bone dust, wherein the size of the pores of the said central filtrating membrane is smaller than the size of the pores of the plurality of porous filtrating plates.

7. The Bone Dust Trap according to claim 1 wherein the said central filtrating membrane is comprising of a plurality of the said peripherally placed slots, allowing the porous filtrating plates to pass through the central filtrating membrane as the lid is pulled when being removed; wherein the central filtrating membrane comprises a peripheral surface that mechanically collects the bone dust and particles accumulated on the inner surface of the said cylindrical housing unit.

8. The Bone Dust Trap according to claim 1 consists of the combination of the cyclone forming mechanism with the said multi-stage filtrating system.

9. The Bone Dust Trap according to claim 1 wherein the said outlet port inner diameter is larger than the inner diameter of the inlet port in order to create negative pressure to ensure tightness of the Bone Dust Trap; wherein the said inlet port and outlet port are shaped conically.

10. The Bone Dust Trap according to claim 1 additionally includes the said o-ring positioned at the junction of the lid and the cylindrical housing unit to tightly seal the Bone Dust Trap.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG. 1 is a perspective view of the Bone Dust Trap in a assembled state;

[0021] FIG. 2 is a perspective view of the Bone Dust Trap in a partially disassembled state;

[0022] FIG. 3 is a side cross-sectional view of the upper part of the invention including the lid and the spiral helix;

[0023] FIG. 4 is a side cross-sectional view of the lower part of the invention including the housing cylindrical unit, central pipe with the porous tip, filtrating plates and central filtrating membrane.

MODES FOR CARRYING OUT THE INVENTION

[0024] With reference to the drawings and, in particular, with reference to FIGS. 1-4, the Bone Dust Trap consists of the two main parts: the cylindrical housing unit, indicated generally at 12, fabricated of a plastic material, preferably transparent; and the lid—10 with the built in cyclone forming system, comprising of the spiral helix—3-4 and inlet port—1.

[0025] The fluids incoming from the patient are delivered into the Bone Dust Trap through the inlet port—1, comprising of the cylindrical tube—13 with conical jet—2. The inlet port connects to the suction line through the conical jet to direct fluids towards the spiral helix—3-4. The spiral helix is attached to the lid—10 and wrapped around the central pipe—9.

[0026] The outer surface of the said inlet port is conically shaped—7 to provide tight connection with the flexible suction line delivering fluids from the patient during the surgical procedure.

[0027] The incoming fluids are then directed towards the upper end of the spiral helix—3 and forming cyclonic motion, move towards the lower end of the spiral helix—4. The distal part (lower end) of the spiral helix—4 is ending at the level of the filtrating porous plates—5, located along the inner sides of the cylindrical housing unit. Leaving the spiral helix, the fluid is directed towards the filtrating plates with plurality of pores—16, where larger bone particles are accumulated. Smaller bone particles—bone dust, which pass through the porous plates are further accumulated on the smaller pores of the central filtrating membrane—14.

[0028] The combination of porous plates and central filtrating membrane are forming the 2-stage filtrating system, allowing to accumulate larger number of the bone particles.

[0029] The membrane is rigidly connected to the central pipe and additionally includes plurality of slots—6 peripherally located corresponding to the location and size of the filtrating plates. When the lid with the connected central pipe and membrane is pulled out, the membrane slots scrub the bone particles from the porous plates surface. The membrane peripheral surface also mechanically collects the bone dust and particles accumulated on the inner surface of the cylindrical housing unit. The filtrated fluid passing through the central filtrating membrane is directed into the lower receptacle—17. From there, the fluid is delivered into the central pipe through the porous tip—8 of the central pipe. The porous tip includes plurality of pores—18 to prevent clogging from blood clots. Directed through the central pipe, the fluid is eventually extracted from the device through the conically shaped outlet port—11.

[0030] The outlet port inner diameter on the outlet side is larger than the inner diameter of the inlet port on the inlet side to create negative pressure and ensure tightness of the device.

[0031] The lid of the Bone Dust Trap is tightly connected to the housing unit through the o-ring—15