US 2853075 A
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Description (OCR text may contain errors)
Sept- 23, 1 R. D. HOFFMAN El'AL RUMEN' TROCAR EXTRICATOR Filed July 10, 1956 Fig.2
FORE/G/V 55 RUME/V Ray 0. Ho'ffma5 Vance A. Car/son INVENTORS.
non W 3 M1 United States Patent D" RUMEN TROCAR EXTRICATOR Roy D. Hoffman, Bedford, and Vance A. Carlson, Kittanning, Pa.
Application July 10, 1956, Serial No. 596,964
3 Claims. (Cl. 128-356) The present invention relates to a structurally new instrument, called an extricator, and used in conjunction with a rumen trocar and utilizing a technique and reliable method steps of removing magnetic foreign bodies from the rumen and recticulum of a bovine, a cow, for example.
In reducing the concept to practice there has been evolved and produced an instrument which is simple in construction as well as in operation, is less costly than present-day expensive rumenotony, minimizes surgical shock, is manipulable and safe and practical for accessible use in all portions of the rumen and reticulum and is otherwise such, when used according to the technique recommended, that it reduces after-care of the cow to an appreciable minimum.
It is a matter of common knowledge that a permanent magnet may be used in exploratory and extricating practices where, from a remote point of control and operation, magnetizable bodies, such as nails, wire and the like may be dislodged and recovered, as it were. It is necessary, of course, to successfully and satisfactorily introduce the magnet into the intended areas of the cows stomach. Keeping this in mind it is an objective in the instant revelation to provide and utilize an extricator instrument which is such in construction and design that it is susceptible of being dropped into the dorsal part of the rumen of the first stomach of the cow making it then possible to slide the same down along the existing partition for reception in the so-called groove of the second stomach. To this end the instrument which is the subject matter of the instant invention is virtually fool-proof in that it can be carried along the dorsal wall and slid over the edge of the partition. With similarly performing instruments now on the market it is necessary to pass them into the mouth and this involves utilizing a flexible hose-like tube which must be flexed by means of a cord hoping, of course, that the leading end with the magnet means thereon will find its way into the second stomach. In the instant situation the operator has at his command an instrument of appropriate construction which gives him definite control in rotation and making it possible to not only readily insert the instrument but to remove it without any injurious effect. What is also important is that the construction here utilizes an instrument which makes it' possible to pass the magnet into the anatomy without endangering vomiting and promoting pneumonia, as frequently occurs, with the marketed instruments which require piloting and passing the tube, magnet and other parts via the mouth and throat into the stomach.
One aspect of the invention pertains, briefly recited, to a structural combination characterized by a rumen trocar embodying a cannula and an insertable and removable stilette cooperable with said cannula and through the medium of which the required trocarizing procedure is undertaken and completed and which results in providing an incision in the para lumbar fossa on the left side of a cow, said stilette being adapted to be wholly detached from the cannula so that the cannula then stays put and functions as an adapter and bushes the ice incision, a permanent magnet, remote exteriorly controlled means connected with and for actuating and manipulating said magnet within limits of the area under exploration, and means supported by and operable in said cannula and which, in turn, supports, and pilots said first named means and otherwise makes it possible to aptly and safely carry out the intended technique and to efficaciously extricate the foreign bodies.
As before pointed out the invention involves not only the physical or mechanical equipment above touched upon but also the method steps which are capable of being resorted to and relied upon because of the devices which have been herein perfected for use. That is to say, novelty is also predicated upon a method or technique of removing magnetizable bodies from the rumen and reticulum of a cow which invokes a generally well known trocarizing procedure and wherein the sequential steps pursued involve the steps of making a prescribed incision in the para lumbar fossa on the left side of the cow, penetrating the rumen by thrusting a one-inch rumenotony trocar into the same by way of said incision, removing the stilette from the cannula and bushing the incision with the cannula so that the cannula constitutes an adapter, and then passing a permanent magnetequipped extricator through the adapter so that the leading end of the adapter may be shoved downwardly and so that the extricator, as an entity lies in a plane almost horizontal with the axis of the cow, then moving the extricator forward, following the dorsal wall of the rumen until the magnet on the leading end comes to rest in the recticulum.
Other and more specific objects, features and advantages will become more readily apparent from the following description and the accompanying sheet of illustrative, but not restrictive, drawings.
In the drawings wherein like numerals are employed to designate like parts throughout the views:
Fig. 1 is a fragmentary perspective view of the rear portion of a cow showing the cows stomach broken away and disclosing the areas involved and showing the extricator in position and the manner in which the maneuverable permanent magnet is susceptible of use in picking up and causing the metallic or magnetizable bodies to adhere thereto;
Fig. 2 is a view like Fig. 1 showing how by reason of extra mechanical facilities it is possible to bring about a sweeping and dragging action of the projectible, retractible and slidable magnet in the rumen, the indicating arrows being relied upon to explain the general mode of use and operation;
Fig. 3 is a view in section and elevation ofthe extricator, the view being foreshortened but ample to show all of the essential structural details;
Fig. 4- is an enlarged section on the line 44 of Fig. 3, looking in the direction of the arrows;
Fig. 5 is a fragmentary view in section and elevation showing the cannula lining or bushing the incision and illustrating the intermediate portion of the sheath or tube located therein for use;
Fig. 6 is a perspective view showing the step which is followed after the incision is made, that is where the pointed end of the stilette forcibly shoved through the incision to penetrate the rumen at the desired place and angle;
Fig. 7 is a perspective view showing the cannula in place with the stilette removed; and
Fig. 8 is a perspective view of the leading end portion of the reciprocable and turnable push-pull magnetequipped rod.
As is evident the extricator or instrument is characterized by a hollow tube of rigid non-magnetic material such as copper, brass or aluminum which is some 42 "A inches long, one-half inch in diameter, said tube being denoted by the numeral and also serving as a sheath. Inwardly or forwardly of the proximal end 12 is a lateral hand-grip 14 which is for the convenience in manipulating the construction as seen especially in Figs. 1 and 2. The distal or leading end portion is slightly enlarged to provide a socket member as at 16 for the adjacent end portion 18 of a suitably constructed Alnico permanent magnet 20. This is connected by a universal joint to the adjacent end of a rigid link 22. More specifically the inner end of the magnet has an eye 24 joined to an eye 26 on the link making a simple universal point susceptible of use in the ways depicted in Figs. 1 and 2. The link 22 is hingedly connected as at 28 to the end of a relatively long push-pull rod 30. On the outer end of the pushpull rod are additional relatively short rigid linearly spaced links 32 and 34 and these are hingedly connected with each other as at 36 with the links 32 hingedly connected at 38 to the cooperating end portion of the push-pull rod 30. Thus the over-all rod structure may be treated as jointed rod means for reciprocating and oscillating the permanent magnet, said rod means being essentially sheathed in the piloting and applicator tube 10. The rumen trocar comprises a cannula 40 having a collar or flange 42 at the outer end and serving as a bushing for the pointed stilette 44 equipped with a handgrip 46. The incision 48 is formed in the area 50 and the cannula functions in the manner shown in Figs. 5, 6 and 7 as is obvious.
The instrument is used in the following manner: The
standard procedure for trocarizing the rumen is used. A 2 /2 inch incision is made in the para lumbar fossa on the left side of the cow. Through this incision a one inch runicnotony trocar is thrust penetrating the rumen. The stilette is removed from cannula and the above described instrument is inserted into the cannula a short distance. The end of the extricator is then shoved downwardly so that the instrument lies in a plane almost horizontal with the axis of the cow. The extricator is then moved forward following the dorsal wall of the rumen until it comes to rest in the reticulum. This position can be ascertained by slight pressure forward on v the instrument and a definite pulsation of the heart will be felt. In this position the jointed rod is shoved forward in the tube so that the swivel is just out the end. The instrument is left in this position in the recticulum for a few moments. Then, the instrument is moved laterally as far as it will go in both directions. The magnet is then drawn in to the head of the tube and the extricator withdrawn through the cannula. will be clinging to the magnet. In some animals the lateral motion of the instrument is not sufficient to reach the lateral wall of the reticulum so that the instrument is used as illustrated in Fig. 2. By manipulating the magnet sweeps the wall laterally in the reticulum. After all metal has been removed from the reticulum, the extricator can be placed in anterior sac and also sweeps the floor of the rumen for potential offenders.
It is believed that the various views of the drawing taken in conjunction with the specification and description, plus the recitation of the objectives will enable persons skilled in this line of endeavor to understand the method steps which are used in carrying out the technique as required and the construction and mode of use of the instrumentality referred to generally as the extricator. In these circumstances a more extended description is believed to be unnecessary.
Magnetic foreign bodies Insofar as the instrument itself is concerned changes in shape, size, material and rearrangement of parts may be resorted to in actual practice without departing from the spirit of the invention or the scope of the subjoined claims.
What is claimed as new is as follows:
1. For use in conjunction with a rumen trocar, an extricator for magnetic foreign bodies comprising an elongated rigid non-magnetic reach-tube having open distal and proximal ends and provided adjacent the proximal end with a lateral hand-grip, a permanent magnet cooperable with said distal end, said distal end having an enlarged bell-like terminal providing a socket, the adjacent end of said magnet being adapted to telescope into said socket, a push-pull rod of a length slightly less than the length of said tube and sheathed in said tube and slidable and rotatable therein, a link hinged to the leading end of said rod, said magnet being connected to the forward end of said link by way of a universal joint, and additional links hingedly joined to each other and the rearward 0r outward end of said rod.
2. For use in conjunction with a rumen trocar, an extricator for magnetic foreign bodies comprising an elongated rigid non-magnetic reach-tube having open distal and proximal ends and provided adjacent the proximal end with a lateral handgrip, a magnet means cooperable with said distal end, and means for operating said magnet means sheathed in the bore of said tube and reciprocable and turnable in said bore, said operating means comprising an elongated push-pull rod, and a link hingedly mounted on the leading end of said rod, said magnet being connected to the forward end of said link by way of a universal joint.
3. For use in removing and extricating magnetic foreign bodies, such as nails and the like, from a bovine rumen and reticulum with the aid of a rumen trocar embodying a cannula and through the medium of which the desired trocarizing procedure may be undertaken and completed and which involves providing an incision in the para lumbar fossa on the left side of the cow for reception of the cannula with the cannula bushing the incision; an extricator for use in conjunction with said trocar comprising an elongated rigid non-magnetic tube of prerequisite length having open distal and proximal ends and provided adjacent the proximal ends with handle means, a magnet cooperable with said distal end, the end of said magnet adjacent to said tube being adapted to telescope into the cooperating adjacent end of the tube, a push-pull rod of a length slightly less than the over-all length of said tube and sheathed in said tube and slidable as well as rotatable therein, a link hinged to the leading end of said rod, said magnet being connected to the forward end of said link by way of a universal joint,
. and additional links hingedly joined to each other and also joined operatively to the proximal end portion of said rod.
References Cited in the file of this patent UNITED STATES PATENTS 1,902,418 Pilgrim Mar. 21, 1933 2,095,976 Foreman Oct. 19, 1937 2,583,937 Fossati Jan. 29, 1952 2,751,912 Christoni June 26, 1956 2,753,869 Mufily July 10, 1956