Applicator device for controllably injecting a surgical cement into bones
First Claim
1. An applicator device for controllably injecting a cement into a bone, the device comprisingan elongated body having a first end portion, a second end portion, a first side wall, a second side wall, and a bottom portion, an axial space between the first side wall, the second side wall and the bottom portion, the axial space having a first end and a second end, a guiding block closing the first end of the axial space and located at said second end portion, the guiding block having an inner path with an inner thread, a rotatable spin having an outer threaded portion, a distal end emerging from the axial space by the first end of the axial space through the inner path of the guiding block, and a proximal end protruding into the axial space, the spin being axially movable within the axial space when being rotated within the inner thread of the guiding block, said proximal end pressing a plunger into a syringe body when said pin is screwed into said axial space, a syringe holder compartment, for holding the syringe body having an open insertion end for insertion of the plunger, and an outlet end with a tubular outlet, the syringe body containing the cement, wherein the syringe holder compartment is a hollow body being releasably fastened by fastening means to said second end portion of said elongated body and comprising an axial inner cavity being in axial alignment with said axial space, an open end for insertion of the syringe body by its outlet end, and an abutment end for abutment thereagainst of the outlet end of the syringe body, the abutment end having an opening for said tubular outlet to protrude out of the hollow body, and wherein the fastening means comprise an axial rib downwardly protruding from the hollow body, the axial rib fitting within a complementary axial recess within said bottom portion at said second end portion of the elongated body, at least two lateral projections emerging respectively from lateral portions of said rib, said projections respectively fitting within holding slots in opposed wall portions of said recess, whereby the holding slots respectively comprise at least first sections that extend into the wall portions in a direction being at least perpendicular to said axial space such that when said projections are fitted within said holding slots, axial movement of the hollow body towards said second end of the elongated body is prevented.
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Abstract
An applicator device for controllable injecting a cement into bones, particularly, in percutaneous vertebroplasty, comprising an elongated body with an inner axial cavity, a guiding block having an inner thread closing a first end of the axial cavity, a rotatable spin having a central outer thread portion and a distal end emerging from an axial cavity through the guiding block, the spin being axially movable within the axial cavity when being rotated, a syringe holder compartment for tightly holding a syringe body within an axial space being in axial continuation of the axial cavity, the syringe holding compartment comprising a hollow body being releasably fastened by fastening means within at least an end portion of said axial cavity, and at least a first axial rib outwardly protruding from the hollow body, the first axial rib fitting within a complementary first axial slot in said end portion of the axial cavity.
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Citations
18 Claims
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1. An applicator device for controllably injecting a cement into a bone, the device comprising
an elongated body having a first end portion, a second end portion, a first side wall, a second side wall, and a bottom portion, an axial space between the first side wall, the second side wall and the bottom portion, the axial space having a first end and a second end, a guiding block closing the first end of the axial space and located at said second end portion, the guiding block having an inner path with an inner thread, a rotatable spin having an outer threaded portion, a distal end emerging from the axial space by the first end of the axial space through the inner path of the guiding block, and a proximal end protruding into the axial space, the spin being axially movable within the axial space when being rotated within the inner thread of the guiding block, said proximal end pressing a plunger into a syringe body when said pin is screwed into said axial space, a syringe holder compartment, for holding the syringe body having an open insertion end for insertion of the plunger, and an outlet end with a tubular outlet, the syringe body containing the cement, wherein the syringe holder compartment is a hollow body being releasably fastened by fastening means to said second end portion of said elongated body and comprising an axial inner cavity being in axial alignment with said axial space, an open end for insertion of the syringe body by its outlet end, and an abutment end for abutment thereagainst of the outlet end of the syringe body, the abutment end having an opening for said tubular outlet to protrude out of the hollow body, and wherein the fastening means comprise an axial rib downwardly protruding from the hollow body, the axial rib fitting within a complementary axial recess within said bottom portion at said second end portion of the elongated body, at least two lateral projections emerging respectively from lateral portions of said rib, said projections respectively fitting within holding slots in opposed wall portions of said recess, whereby the holding slots respectively comprise at least first sections that extend into the wall portions in a direction being at least perpendicular to said axial space such that when said projections are fitted within said holding slots, axial movement of the hollow body towards said second end of the elongated body is prevented.
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16. An applicator device, for controllably injecting a cement into a bone, the device comprising
an elongated body having a first end portion, a second end portion, a first side wall, a second side wall, and a bottom portion, an axial space between the first side wall, the second side wall and the bottom portion, the axial space having a first end and a second end, a guiding block closing the first end of the axial space and located at said second end portion, the guiding block having an inner path with an inner thread, a rotatable spin having an outer threaded portion, a distal end emerging from the axial space by the first end of the axial space through the inner path of the guiding block, and a proximal end protruding into the axial space, the spin being axially movable within the axial space when being rotated within the inner thread of the guiding block, said proximal end pressing a plunger into a syringe body when said pin is screwed into said axial space, a syringe holder compartment, for holding the syringe body having an open insertion end for insertion of the plunger, and an outlet end with a tubular outlet, the syringe body containing the cement, wherein the syringe holder compartment is a hollow body being releasably fastened by fastening means to said second end portion of said elongated body and comprising an axial inner cavity being in axial alignment with said axial space, an open end for insertion of the syringe body by its outlet end, and an abutment end for abutment thereagainst of the outlet end of the syringe body, the abutment end having an opening for said tubular outlet to protrude out of the hollow body, wherein the hollow body fits between opposed sections of said side walls of the elongated body and wherein the fastening means comprise two lateral projections emerging respectively from opposed lateral portions of said hollow body, said projections respectively fitting within holding slots in said opposed sections of side walls of the axial space, said holding slots comprising at least first sections that respectively extend into said opposed sections of the side walls in a direction being at least perpendicular to said axial space such that when said projections fit within said holding slots, axial movement of the hollow body towards said second end of the elongated body is prevented.
Specification