Medical instrument for the targeted introduction of a substance into a body cavity, and tool therefor

Abstract

The present invention relates to a medical instrument for the targeted introduction of a substance into a body cavity and to a tool (1) therefor. According to the invention, the tool (1) has a shaft (2) with a lumen (6), on the distal end (1″) of which is situated a nozzle head (3) with at least two nozzles (4), wherein the nozzles (4) are spaced from each other at an angle of less than 180° and equally relative to a centre axis (M) of the shaft (2).

Claims

1. A tool (1) for a medical instrument for targeted introduction of a substance into a body cavity, wherein the tool (1) comprises a shaft (2) with a lumen (6), the shaft (2) having at a distal end (1″) thereof a nozzle head (3) with at least two nozzles (4), wherein the nozzles (4) are positioned at an angle of less than 180° (α) in relation to a center axis (M) of the shaft (2) and are uniformly spaced apart from each other and comprise nozzle openings (12), wherein the nozzle openings (12) are connected by a distributor cone (10) to a bore (8) and to the lumen (6), and wherein the nozzle head (3) is rotatably supported in the shaft (2) and experiences a torque when the nozzles (4) are supplied with the substance; wherein the nozzle head (3) comprises a cylindrical nozzle body (7) which is received in the lumen (6) of the shaft (2), and wherein the nozzle body (7) comprises an annular groove (9) in which an annular sliding seal can be received; wherein the nozzle body (7) comprises in a proximal section an impeller (16) with a plurality of vanes and a bearing ring (15) in a distal section which adjoins the nozzle head (3), and wherein the shaft (2) comprises two lumina (6′, 6″) that are connected by a bend (6′″) to each other and each comprise a through opening (17) which coincides with the position of the impeller (16) in a mounting arrangement of the tool (1).

2. The tool (1) according to claim 1, wherein the at least two nozzles (4) comprise three nozzles (4) which are positioned at an angle of 120° (α) in relation to the center axis (M) of the shaft (2) and are uniformly spaced apart from each other.

3. The tool (1) according to claim 1, wherein an end face (2′) of the distal end (1″) of the shaft (2) is embodied so as to correspond to a shape of the nozzle head (3).

4. The tool (1) according to claim 1, wherein the shaft (2) at a proximal end (1′) thereof comprises a connector (5) for fluidly connecting the lumen (6) to a fluid source (22), wherein the connector (5) is a Luer lock connector.

5. A medical instrument for introduction of fluids into a body cavity, the medical instrument comprising a trocar (23), a fluid source (22), and a tool that is connectable detachably to a handle (20) and in fluid communication to the fluid source (22), wherein the tool is a tool (1) according to claim 1.

6. The medical instrument according to claim 5, wherein the tool (1) is connected to the fluid source (22) by a flexible fluid conduit (21).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) It is shown in:

(2) FIG. 1 a schematic side view of the tool according to the invention,

(3) FIG. 2 a longitudinal section view A-A of the tool,

(4) FIG. 3 a detail view B of the nozzle head in longitudinal section,

(5) FIG. 4 a section view of a further embodiment of the nozzle head,

(6) FIG. 5 a schematic plan view of the distal end of the nozzle head,

(7) FIG. 6 a schematic view of a handle with inserted tool, and

(8) FIG. 7 a schematic view of a trocar with inserted tool.

DESCRIPTION OF PREFERRED EMBODIMENTS

(9) The device according to the invention relates to a medical instrument that comprises a tool 1 which, according to FIG. 1, has a shaft 2 with a proximal end 1′ and a distal end 1″. FIGS. 1 to 3 show the tool 1 in individual details. At the proximal end 1′, there is a connector, a so-called Luer lock 5, to which different hoses or liquid supplies can be connected. The Luer lock 5 is in fluid communication with the lumen 6 (see section view A-A in FIG. 2). The shaft 2 is elongate and tubular and has a diameter of approximately 10 mm in a preferred embodiment. Diameters in a range of 1 mm to 30 mm are possible.

(10) At its distal end 1″, the shaft 2 comprises moreover a nozzle head 3 with a plurality of nozzles 4. In FIG. 3, a detail view B of the nozzle head 3 is illustrated. The nozzle head 3 comprises a nozzle body 7 with a cavity as well as an annular groove 9 which is arranged shortly below a spherical thickened portion of the nozzle head 3. The cavity is embodied as a bore 8 or central bore and is connected in fluid communication with a distributor cone 10. A supply channel 11 extends at an angle α of approximately 120° in relation to a center axis M of the bore 8 away from the bore 8 and connects it in fluid communication with a nozzle opening 12. Between distributor cone 10 and supply channel 11, a spherical collecting cavity 13 is provided which forms also the center point of the nozzle head 3. The bore 8 is connected in fluid communication with the lumen 6 of the shaft 2. The center axis M of the bore 8 as a central bore corresponds in this context to the center axis M of the shaft 2 and therefore also of the tool 1.

(11) The head 3 is substantially spherically designed and comprises, as shown in FIG. 5, a total of three nozzles 4. The nozzles 4 are uniformly distributed about the spherical body 3 and are positioned respectively at an angle of 120° relative to the center point of the head 3. The head of the tool can comprise arbitrarily two to ten nozzles which are arranged in a circular arrangement relative to each other, as needed on different axes.

(12) In this way and in particular due to the shape illustrated in FIG. 5, a particularly uniform distribution of the fluid sprayed through the nozzle 4 is achieved. The center point of the nozzle head 3 corresponds in this context to a spatial center of the collecting cavity 13.

(13) Fluid that passes from the lumen 6 via the bore 8 into the distributor cone 10 is guided from there to the downstream reduced cross section and guided from the collecting cavity 13 to the individual supply channels 11 and then supplied to the respective nozzle opening 12.

(14) The head 3 is rotatable, as can be seen in FIGS. 3 and 4. An end face 2′ of the distal end 1″ of the shaft 2 is correspondingly designed thereto so that the nozzle head 3 is supported at the distal end 1″ of the shaft 2. The end face 2′ of the shaft 2 is conical in FIG. 3 and accommodates partially the head 3.

(15) In FIG. 4, the head 3, at its side that is facing the distal end 1″ and thus the end face 2′, is embodied of a flat configuration so as to correspond to the end face 2′ which is also flat here. So that the nozzle body 7 during use is not pushed out of the shaft 2, the nozzle body 7 and the shaft 2 have the following components: The lumen 6 of the shaft 2 tapers to the distal end 1″ of the tool 1 and opens in a cone 14 that connects the lumen 6 to a lumen 6′ whose diameter is strongly tapered in comparison to the lumen 6. The cone 14 in FIG. 4 is arranged in a lower third of the shaft 2 wherein the lumen 6′ extends parallel to the center axis. The lumen 6′ comprises in its distal end region a through opening 17 through which the fluid can be guided out of the lumen 6′ to an impeller 16. The nozzle body 7 comprises a plurality of vanes which form the impeller 16. By means of the impeller 16, the fluid is guided into a further lumen 6″ and through a bend 6′″ into the bore 8 of the nozzle body 7. From here, the bore 8 extends into the supply channel 11 and to the nozzle 4. At the nozzle body 7, there is moreover a bearing ring 15 which is rotatably supported in the shaft body 2. For this purpose, in the shaft body 2 a corresponding circular cylindrical cutout 19 is formed as a receptacle. In this way, the nozzle body 7 is held in the shaft 2. Between bearing ring 15 and impeller 16, a sliding surface 18 is provided so that the nozzle body 7 can rotate with low friction in the shaft 2.

(16) The tool 1 can be connected by means of the Luer lock connector 5 to a handle 20 and a fluid source 22, as illustrated in FIG. 6. The fluid source 22 is connected by a fluid conduit 21 in fluid communication to the handle 20 and thus to the tool 1. Moreover, the tool 1 can also be used together with a trocar system in the context of minimal invasive surgery, as illustrated in FIG. 7. For this purpose, the tool 1 is inserted into a trocar 23. By means of a connectable fluid connector 24, the tool 1 can be connected via a fluid conduit 21 in fluid communication to the fluid source 22.

LIST OF REFERENCE CHARACTERS

(17) 1 tool 1′ proximal end 1″ distal end 2 shaft 2′ end face 3 nozzle head 4 nozzle 5 Luer lock connector 6, 6′, 6″ lumen 6′″ bend 7 nozzle body 8 bore 9 annular groove 10 distributor cone 11 supply channel 12 nozzle opening 13 collecting cavity 14 cone 15 bearing ring 16 impeller 17 through opening 18 sliding surface 19 cutout 20 handle 21 fluid conduit 22 fluid source 23 trocar 24 fluid connector A-A a longitudinal section B head in detail M center axis