Surgical injection needle and the like
United States Patent 2008340

The present invention relates to needles and the like instruments, such as trocars and canulas, for making surgical injections, and has for its object the provision of certain improvements in this class of surgical instruments. More specifically the present invention refers to the needles,...

Tomas, Salvati Alberto
Alceste, Salvati Agustin
Application Number:
Publication Date:
Filing Date:
Tomas, Salvati Alberto
Alceste, Salvati Agustin
Primary Class:
International Classes:
A61B17/34; A61M25/02
View Patent Images:


The present invention relates to needles and the like instruments, such as trocars and canulas, for making surgical injections, and has for its object the provision of certain improvements in this class of surgical instruments.

More specifically the present invention refers to the needles, canulas and trocars employed in intravenous injections and has for its object the provision of anchoring means for such instruments, so that it shall be possible to leave the instrument, as for example a needle, inserted in the body without thereby causing any inconvenience to either the patient or operator.

Those skilled in the art will readily understand -5 that in many instances the patient, especially if he has to undergo a major surgical operation, has to have intravenous injections administered to him at frequent intervals. If therefore, it is not possible to leave the needle inserted, a fresh 20( puncture will have to be made every time an injection is administered, and this, apart from being very irksome to the patient has a number of other drawbacks. Again, when an intravenous injection of a considerable quantity of liquid 25. (physiological or artificial serum) has to be made, a person is required to watch that the needle does not slip out of the vein.

To overcome these difficulties, a canula which may be left operatively inserted in the vein has 30'- already been proposed, but it suffers from the disadvantages that an incision is necessary in order to enable the canula to be positioned and that the circulation of the blood in the vein concerned must be stopped.

According to the present invention all these drawbacks and troubles are avoided by providing in combination with the instrument (needle, canula or trocar) means whereby it may be anchored or fixedly secured to a convenient external part of the body, while permitting the vein to be reached without requiring an incision or the laying bare of the vein or the stoppage of the circulation therein, as is the case in the method to which reference has been made. For the better understanding of the present invention and of the manner in which the same is to be performed, certain embodiments thereof will now be described and reference will be had to the accompanying drawing in which Fig. 1 is a side elevation of a needle provided with anchoring or fixing means in accordance with the present invention.

Fig. 2 is a section on the line I-I of Fig. 1.

Fig. 3 is a side elevation illustrating a modified form of the anchoring means.

Fig. 4 is a perspective view of the head of a needle modified to permit its use with the anchoring means of Fig. 3.

Fig. 5 is a perspective view of the anchoring means of Fig. 3.

Fig. 6 is an elevation of the operative end of the anchoring means of Fig. 3, and Fig. 7 is a perspective view of a needle with a further modification of the anchoring means.

In accordance with the present invention means for anchoring the instrument (needle, canula or trocar) once its operative end has been introduced into the body, are operatively associated with said instrunent. In the embodiments illustrated in Figs. 1 and 2, said means consists of a plate I pivotally connected at one end to the head or grip 2 of the instrument 3, which in the figure is shown as a needle. Preferably the end 4 of the plate I which is to be pivotally attached, is provided with an upstanding lug 5 which may be integral with said plate or permanently attached thereto, and which fits in slot 6 in the head 2 and is pivoted on the pin 7. Instead of this system of coupling, a universal or other articulated joint may be employed or the plate 1 may be directly and fixedly joined to the head 2.

The length of the plate must be sufficient to permit of its being tied down or anchored to the part of the body concerned by means of bandages, strapping or adhesive tape (not shown). The head or grip 2, especially when the plate I is pivotally coupled thereto, is larger than in ordinary instruments of the same kind so as to provide sufficient material to allow the slot 6 to be cut without interfering with the duct 8 of the 3 instrument.

In the modified form shown in Figs. 3 to 6, the anchoring means are in the form of a pair of plates la and Ib rigidly coupled together in spaced relation but not permanently connected to the instrument. In the present instance, the plates la and Ib are the legs of a substantially U-shape element the cross-member 10 of which is bent up at right angles and carries affixed thereto the arched guard II. Said cross-member 10 has a central slot 12 extending vertically upwards from the line of bend and adapted to receive the forward portion of the slightly modified head or grip 2a. The ends of the plates la, Ib remote from cross-member 10 are rigidly coupled in 60 spaced relation by means of the bridge-piece 13, and to assist in holding in place the strapping or bandage used for the actual anchoring of plates la and lb to the part of the body concerned, a guide or bracket 14 may be provided on each plate.

The forward part of the modified head or grip 2a of the instrument 3a to which reference has been made, is provided with a pair of grooves 5 which co-operate with the edges 16 which laterally define slot 12, so as to anchor the needle after it has been placed in position and the device shown in Fig. 5 has been applied.

According to the embodiment illustrated in Fig. 7 the anchoring means consists of a pair of brackets 4a fixedly mounted on either side of the head or grip 2b of the instrument 3b.

The portion 17 of the instrument, which is intended to be inserted in the body of the patient, is hollow so as to be able to receive a mandrel, the upper part of which is indicated at 18 in Fig. 1.

Thus, when the portion 17 has been inserted, and the injection or other operation has been performed, the mandrel 18 may be introduced so as to close up portion 17. Moreover, the mandrel which is longer than the instrument and which, if the instrument 3 is in the form of a needle, will have a blunt point, prevents the needle from damaging the vein after insertion and also any effusion of blood.

The portion 17 may have any suitable shape; for example, it may be straight or curved, and the head of the mandrel 18 is preferably provided with a projection 18a adapted to engage in a slot 19a cut internally of the mouth 19 of the instrument to prevent accidental rotation. If instead of being a needle the instrument is a canula, two mandrels must be used, one with a sharp point (needle or chisel-shaped) and the other with a blunt point. The sharp-pointed mandrel when introduced into the canula allows the puncture to be made and the vein reached and the blunt mandrel will thereupon replace the former for the purposes already indicated.

The instrument is used in practice as follows: When the usual preliminaries have been attended to, the puncture is made in the vein concerned by means of the instrument (with or without its sharp mandrel as the case may be). When the instrument has been properly inserted, the blunt mandrel may then be introduced, (the sharp one being if necessary first removed) and as stated, the blunt point will extend beyond the free end of the instrument. The instrument is then anchored by means of the plates or brackets and the aid of bandages or adhesive tape, to the neighbouring external part of the patient's body.

With this arrangement, when it is desired to make an injection or withdraw a sample of blood, it is necessary merely to withdraw the mandrel and connect the syringe or other apparatus to the mouth S9 of the instrument. When the injection or extraction has been made, the mandrel is replaced. It will therefore be seen that with the device described, the proposed ends have been attained, that is to say, such improvements have been made in instruments of the class referred to as will allow them to remain in their inserted operative position and firmly anchored without requiring an incision to be made or the circulation to be stopped, The plates and brackets may be of any suitable material, as for example white metal, and the plates may also be slightly flexible so that they will adapt themselves more readily to the contour of the part of the body to which they are anchored.

It is clearly understood that various modifications of construction and detail may be made without thereby departing from the nature or scope of the present invention.

Having now particularly described and ascertained the nature of our said invention and in what manner the same is to be performed, we declare that what we claim is: Improvements. in surgical instrument comprising in combination an intravenous injection instrument having a hollow duct portion adapted to be inserted into the body of a patient for the purpose of puncturing a vein, a head portion adapted to be connected to a co-operating apparatus and to remain outside of said body upon insertion of said duct portion, an axially extending slot in said head portion, a plate for fixing said injection instrument to the body of the patient after insertion of the duct portion, an upstanding axial lug at one end of said plate adapted to engage in said slot, and coupling means for pivotally coupling said lug to said head portion.