CN1012937B

CN1012937B - Medical instrument for removing bone

Info

Publication number: CN1012937B
Application number: CN 86103723
Authority: CN
Inventors: 丹尼尔·K·法尔利
Original assignee: Waldemar Link GmbH and Co KG
Current assignee: Waldemar Link GmbH and Co KG
Priority date: 1986-06-05
Filing date: 1986-06-05
Publication date: 1991-06-26
Also published as: CN86103723A

Abstract

The present invention relates to an improved rongeur or a bone rongeur which is provided with a clamping mechanism. The present invention comprises a cylinder component of which the tail end is provided with a ground cutting edge, and a shaft rod which can move in the cylinder component in a reciprocating mode. A plate component is connected with one tail end of the shaft rod, and simultaneously, the plate component faces the cutting edge for clamping the bone. The present invention also provides a lever mechanism, wherein the lever mechanism is provided with a pair of handle levers which are connected by a pivot shaft, and the cylinder component and the shaft rod are connected with the handle levers between a handle and the pivot shaft. The shaft rod is also provided with a cavity, and when the cutting operation is carried out, the cavity gradually slides in the cylinder component. Consequently, the broken bone is gradually taken out from a collecting cavity.

Description

Medical instrument for removing bone

The present invention relates generally to sting bone or deep type pincers.In this field, the long-term purpose of thirsting for realizing provides a kind of cheap and simple, be easy to dismantle and clean, particularly can be safely and the pliers of operating effectively.The patent of having issued in this technical field that has has earlier proposed possible solution.Typical prior art is No. 1040523 patents of the U.S. that are presented to De Vilbiss.Wherein propose one be installed in the leverage that a handle on the pivot is formed about a central axis opposite to one anotherly by two arms.On the extension of this handle member, be equipped with a clamping sheet mechanism, include two movable intermediate plates.First movable intermediate plate is installed in second qualification groove on the movable intermediate plate, and motion therein.After the bone of catching between the intermediate plate cuts down, promptly in groove, propose.Relevant with other mechanism with this an in this technical field problem is that uncontrolled power has been added on the bone surface around the cutting zone, the bone damage so just may take place and breaks.If operation is near spinal cord, nerve also may come to harm.The GUSUIPIAN of downcutting from osseous tissue can not fully be grasped by apparatus in addition, may make wound infection simultaneously.At last, pivot is positioned between clamping sheet mechanism and the lever handle, therefore can only obtains limited mechanical advantage, make this instrumentation get up to require great effort owing to have.

Therefore, main purpose of the present invention is that a kind of improved used pliers or rongeur of cutting bone that be is provided.Wherein after the cutting in a single day, broken bone can be contained in the apparatus reliably, and quilt in hand, until taking out selectively.

Further purpose of the present invention provides a flaky gripping body of folder, wherein when bone fragments is cut, can leaves in immediately and collect in the apparatus.

A further object of the present invention is to eliminate within cutting zone and uncontrolled power on every side, and contingent bone damages and breaks beyond cutting area to avoid.

A further object of the invention is that the lever of improvement machinery thinks that this device provides improved mechanical advantage and better control is provided when performing a surgical operation.

In brief, the invention provides an improved deep pliers or rongeur, it has a gripping body that is made of cylindrical element, and an end of cylindrical element is ground to cutting edge.There is one to be positioned at cylindrical element inside in addition for carrying out the axostylus axostyle that reciprocating is assembled.On this axostylus axostyle, dispose one and be connected its terminal plate, so that catch bone facing to cutting edge.A leverage that provides is equipped with a pair of by pivotally connected handle lever, and between shank portion and pivot cylinder and the axostylus axostyle that is connected in the handle lever is arranged.On axostylus axostyle, a cavity also is provided, when cutting operation carried out, cavity can progressively slide in cylinder, gradually the broken bone in the collecting chamber is pulled out.Only allow cutting action and the crushing action can not be arranged, thereby alleviated the pressure on the plate, like this, when the cutting osseous tissue, just reduced the probability of the above-mentioned member that fractures.

Other member and advantage of the present invention will obtain clearer understanding by reading following detailed description and consulting accompanying drawing, among the figure:

Fig. 1 is a most preferred embodiment cut-away section perspective view of the present invention;

Fig. 2 is the enlarged perspective of apparatus end in the operation;

Fig. 3 is the side view of most preferred embodiment of the present invention;

Fig. 4 is the side view of axostylus axostyle of the present invention;

Fig. 5 is along the axle end perspective view of AA line in Fig. 4 view;

Fig. 6 is along the cut-away section perspective view of BB line in Fig. 3 view;

Fig. 7 is the side view of another alternate embodiments;

Fig. 8 is along the sectional drawing at II X-II X line place among Fig. 7;

Fig. 9 is along the sectional drawing at IX-IX line place among Fig. 7.

Though will present invention is described in conjunction with preferred example, but will be understood that also we do not wish to limit the present invention with this embodiment, on the contrary, we attempt to comprise that all are included in the replacement type in design of the present invention and the scope, modified model and equivalent type, the scope of the invention are only limited by the claim that proposes.

At first see Fig. 1, wherein show the pliers of most preferred embodiment of the present invention.Show a pair of handle member 12 and 14 among the figure particularly, shown position is to make it to hold together state in the staff reinforcing, and the direction of power is shown in the arrow 16, as the mode of using hand vice.This is installed on the pivot about axis 18 handle, and its installation site is supported and dragged cylinder and axostylus axostyle cutting mechanism being used for as shown in the figure, more fully is described below.

A grip force acts on a pair of handle member, makes the direction closure of handle along arrow 16, compresses this simultaneously to the middle springs between the handle 20.Position when this just produces a restoring force and makes handle rotate back into it to begin.As shown in Figure 3.Different and the isolating element of this returning spring all is to make of spring steel, and each is rigidly connected in separately handle lower end 22 and 23 places respectively, and at the hinged interlocking in intermediate contact 24 places.

Cylindrical element 26 usefulness screw method are anchored on first member of a pair of handle, it be by one with the handle connecting place, have the cylindrical tube of external screw thread 28 to constitute.Its other end sees Fig. 6 for details for sharpening 30(), in order to cutting near thereon bone.In general, only its first half edge is ground for cutting bone, and Lower Half edge 31 and end are left an angle and contacted with reciprocating mechanism avoiding.

For in above-mentioned cylinder, reciprocating moving unit being installed, an axostylus axostyle is provided, it is connected on above-mentioned second handle member pivotally at axle 32 places, and stretches out selectively from another end of above-mentioned cylinder.The axostylus axostyle (see figure 4) is made up of first linkage section 34 and the power pass segment 36 that are used to be connected on the handle pivot.This power pass segment transmits handle leverage power, makes it be delivered to the position of cylinder ends cutting bone from afar.At last, a part deep and that grab bone being arranged, is that tabular plate 38 constitutes by profile, and it is horizontally installed in the axostylus axostyle end.Shown in the figure, near enlarged in thickness this plate and the axostylus axostyle junction, purpose is to prevent to break.Above-mentioned axostylus axostyle is provided with a cavity segment 40(and sees Fig. 5), it is limited by depression on this section axostylus axostyle.In this preferred example, cavity is made of a flat recess section, and is represented by the cut-off parts of above-mentioned axostylus axostyle.At last, provide a seal section 42, when axle end was drawn in the cylinder, it was used for the space between closed cylinder and the axostylus axostyle.The effect of seal section is to keep not have broken bone in the cylinder and behind cutting operation broken bone is discharged.

For improving the mechanical advantage of pliers, need to increase leverage.This depends on the situation that is connected of holding cylinder and axostylus axostyle between the part with a firm grip at handle pivot and handle.During clamping, on holding part with a firm grip, handle exerts pressure with hands.Utilize the distance 50 that changes between cylinder and axostylus axostyle junction point and the pivot in addition, can make that mechanical advantage can guarantee comfortable operation in the deep process of anxiety.In addition, during transmission, when spacing 50 increased, then the movement tendency of pliers reduced, and fine setting is to utilize near hold with a firm grip part and being kept of the handle that keeps cylinder and the axostylus axostyle junction.

(see figure 2) when operation is implemented there is shown one section osteocomma 52, clipped between axostylus axostyle and plate 56 and cylinder 58 sharpenings one section cut-off parts 54 not.When axostylus axostyle when cylinder is drawn in, the bone 60 of cutting-out promptly is collected in the cylinder.On the contrary, in case after this one stroke was finished, pliers promptly shifted out from cutting position, and axostylus axostyle can extend to the bone that makes cut-out and enters storeroom easily in the suitable containers from cylinder.

Once, illustrated and described one pliers or rongeur that has improved has a gripping body, comprises a cylindrical element and a reciprocating axostylus axostyle in tube that has the cutting edge of terminal grinding.Assembled a plate that is used for splenial bone facing to cutting edge at the axostylus axostyle end.Also provide a leverage, have, at the cylindrical element and the axostylus axostyle that are connected in addition between handle and the pivot on the handle lever by the banded a pair of handle lever of pivot.On axostylus axostyle, when carrying out cutting operation, also be provided with a cavity, can in cylinder, slide progressively, gradually the bone that is collected in the cavity internal cutting off is pulled out.

Although in according to the embodiment among Fig. 1-6, the plate 38 of cylindrical element and respective shapes all has the cross section of a circle.But among the embodiment in Fig. 7-9, this shape is elongated, cylindrical element 26 ' cutting edge 30 ' and the plate 38 of respective shapes ', limited across the arch formula section on two parallel cutting surfaces by two parallel cutting surfaces and one.Cavity zone 40 ' in, a rectangular transverse section of axostylus axostyle 36 ' have.Compare with the embodiment shown in Fig. 1-6, this different scheme allows to grab folder and cuts more substantial bone.The section of same some other shape also can be used in the present invention's design.

Claims

1, a kind of medical apparatus and instruments that is used for removing bone comprises:

An inflexible cylindrical element (26), its end are limited with a cutting edge (30,58),

An axostylus axostyle (36), it coaxially is installed in the described cylindrical element, and can move back and forth therein, a plate (38,56) laterally be installed in the end of axostylus axostyle with respect to axostylus axostyle, a depressed part on it and the axostylus axostyle is a near cavity of qualification (40) described plate together

A leverage (12,14), it is used for reciprocally driving the axostylus axostyle in the described cylindrical element, so that (a) described plate (38,56) is moved back and forth with respect to described cylindrical element (26), be positioned at described cutting edge (30 and catch, 58) and the bone between the described plate (38,56) and (b) described cavity (40) is moved back and forth with respect to described cylindrical element, and will be collected in wherein by the broken bone that described cutting edge downcuts

The reciprocating motion of described axostylus axostyle in described cylindrical element defines an open position and make position of described medical apparatus and instruments, when medical apparatus and instruments is in described open position, described plate separates with described cutting edge, when described medical apparatus and instruments moves between described open position and make position, described cylindrical element keeps resting state

It is characterized in that:

When described medical apparatus and instruments is in described closed position, described plate laterally is attached on the described cutting edge, even also proper described medical apparatus and instruments is when described open position moves to described make position, and described plate (38,56) be brought to and the tight position contacting of described cutting edge (30,58).

2, according to the medical apparatus and instruments of claim 1, it is characterized in that also having a seal section (42) on the described axostylus axostyle, the sealing section has enough big diameter, be sealed and matched so that provide effectively in described cylindrical element, the broken bone that is beneficial to downcut is collected in the described cylindrical element also selectively with its discharge.

3,, it is characterized in that the limit (58) that described cutting edge is gone up through grinding by described cylindrical element (36) constitutes according to the medical apparatus and instruments of claim 2.

4, according to the medical apparatus and instruments of claim 1 or 2 or 3, it is characterized in that described leverage comprise one pivotally connected handle mechanism, this handle mechanism has the paired handle that pivot connects, and described axostylus axostyle and the cylindrical element position (32) between described paired handle and pivot (18) is connected handle mechanism with described.