US2460473A - Catheter - Google Patents

Description

M. L. SMITH 2,460,473

CATHETER v Feb. 1, 1949.

3 Sheets-Sheet 1 Filed D90. 17, 1945 Feb. 1, 1949.

M. L. SMITH CATHETER 3 Shegets-Sheet 2 Filed Dec. 17, 1945 M. 1.. SMITH Feb. 1, 1949.

CATHETER 5 Sheets-Sheet 3 Filed Dec. 17, 1945 Patented Feb. 1, 1949 I t V 2,460,473

CATHETER 'MintomIaafkin smithgfiavannah; Ga.

l Applicationflkcem'ber 17,1945; "Seli'alNo. 6353528 (Gl.r1 28- 349) :17 'Claims.

This invention-is a "novel catheter adapted to irrigateand drain-the'kidney at the same time, ""the principal object bei-ngto "provide a catheter -o'f-"the-above typethrough which a solution may be forced 'underpressure against-a kidney stone e12 holes; "and also showing-the outlet end er inner tube.

E ig. -4 is --a longitudinal =sectiona1 view 6f a lodged'inthe uretertract between the kidney and the*"bla;dder, 'to-canse the stone to'dissolve or become sufificiently-"reduce'd insize to pass-out;- said catheter having slots or grooves 'in' its head end "and-sides which will allow the solution to drain "out therethrou'gh while in the I ureter tract 1 betweenthkidneyand bladder. g

Another object ofthe inventionis to provide a tiibular catheter er "the above-type or rubber,

a-iplafs'tic, another-suitable materialwither Without a bulge molded i-n-its exterior'wall, said bulge, when provided, serving to hold the catheter-in the kidney or ureter tract when the bulge is in mormabenpanded -condition,=whereby the catheter wi ll beheld against slipping within the tract; -a'

fieiible r ig'id inner tube being *insertable in the *catheter before the latter is inserted up "to the ki'dney, the tube or rod being manipulated "to stretch orlongate the catheter so as to reduce v *the bulge "tot-he approximate outside diameter of' the main body of"- thecatheter while entering the tract, after which when the-catheter is so *insertedthetub'e or rod may be-retractedsomewhat sothatthebulge will thereupon resume its kmormal-expandd -size= within the ureter tract or r lidney.

--I-'Will =expla'in the invention with referenceto the, accompanying drawings,- which illustratersev- --eral practical "embodiments thereof 'to "enable -dthers*familiarwith' the" art to adopt and-use the "samezlaird willsummarize-in the claims;the novel features: of construction, and novel combinations -ofparts,"ifor"which protection is desired,

' ecatheter shown in:ZFig.11;showing the flexible .but

t-rrclatively :non-elongatable inner -::tube through which the ection solution is introduced into etheikidney. 558.33 perspectivewiewxof: a: modified cathfacterihaymgrthreengrooves or slots with drainage *metaillic inner tubear rod "provided with a-' flange near its outer-end toprevent the tube from sl-i-pling out through the head of" the catheterduring stretchin of the catheter.

"=Eig.' 5 is -a perspective view-"of' the metal inner tube-shown 'iniFi'g; 4, detached, 'showing the inner "flan'ge near the outer=end,= and-showing the outer end' threaded to-receive-a nut-at the=end of*'the "catheter-to prevent the inner tube from slipping downins'ide' thecatheter.

"Figs-6 is 'aiperspective'vmw of the'nut s'hown' in Fig. 4, detachedprovided with slots: in its outer end allowing same to be turned on or (iii the tube when using a screw driver.

Rig. 7 is :a. perspective view of a further modified catheter "similar to that shown in'iFig. -1, but in which the bulge is omitted,=-and showing-the inlet of the innerr tii-be.

28"is a-longitudinal section through'the 1 catheter shown Fig. '7

="Assh'own in Figs. Ti 1 and 2, the catheter 'comprisesarr outer' flexible 'elongatable tube l of rubber; plastic, whether-suitable material' hav-ing a zbulbous portion 2=adjacent its outer endg'the thickness of the walls at'thebulb'bei-ng somewhat thinnerr' than thevnormal '-'thickness or the tube l,

'WhGI Gby theZJbUIbOUS 'portiommay be contracted w-hen tube I is elongated, thereby reducing the bulbous portion to-approximatelythe same diameter as the'main portion at tube l.

Within the tube -l and-closing the outer-end thereof, is an integral inner tube-ii of flexible materialwhich :is' relativelyhon-elongatable; tube :3 having a; bore 4 for the passage therethrough of the treating solution, the bore being open-at its outer end. The material of tube'3 is relatively stifierathan 'that oftube l butis such thatthe .catheterma-Ybe bent-to conform orfollow the curves of 'the ureter tract of-the human body.

ZTheinner tube- 4 passes-out of'the outer tube I though a perforation 5 (Fig.- 2)- in its Wall.

'-At the outer end of the catheter in the sidewall thereofis a groove 6 communicating, asatta,

withithe' bore of the outer tube around-the tube 3, while .at the-opposite side of the catheter isa groove which is preferably somewhat longer "than the groove-' 6, same =having athroat 1a also .ccommunicating with the bore of out-er tube I around-the inner-tube 3.

By the above construction,-when-entering the catheter in-the 1 ureter tract towards the kidney,

the irmer tube 3 would be pushed upwardly or outwardly with respect to the outer tube I, thereby elongating the bulbous portion 2 and reducing the diameter thereof. After positioning the catheter in the tract or kidney the inner tube 3 would then be retracted to its normal position, thereby permitting the bulbous portion 2 to again expand thereby locking the catheter in position in the tract or kidney so that the catheter will not slip out. The treating solution would be discharged through the bore 4 of the inner tube 3 under pressure so that any kidney stone lodged in the tract between the kidney and bladder would be dissolved or so reduced in size that same may be readily passed, the solution draining from the kidney or tract through the grooves 6 and i and into the bore of outer tube 1 around inner tube 3.

In Fig. 3 a modified form of catheter is shown in which the parts are generally similar to those shown in Figs. 1 and 2, and similar parts are similarly numbered. In this modification however two slots 6 and one slot l are provided inthe catheter for drainage purposes, the slots being preferably disposed about 120 apart around the circumference of the catheter; otherwise the catheter is shown, same comprising outer tube of rubber, plastic or other suitable material which is sufliciently flexible to follow the curvatures of the ureter track in the human body. This modification is somewhat similar to those shown in Figs. 1 to 3, but the bulbous portion 2 shown in said preceding figures is omitted. In this modification the wall of tube l is thickened along one side, as at I'm (Fig. 8), and the thickened portion lm is provided with a bore lp extending from side opening 5 inthe wall of tube i to the center of the outer end of the end wall is of the tube I through which bore lp the treating solution is passed, bore lp thus serving the same function as the inner tubes 3 and 8 of the modifications shown in Figs. 2 and 4. The outer end of the tube l is provided with one or more grooves 6, as in Figs. 1 and 3 communicating with the interior of the tube I around the thickened wall lm, and is also provided with the longer groove 1 likewise communicating with the interior of tube l through which the treating solucatheter shown in Fig. 3 is the same as that shown in Figs. 1 and 2. a V

In Figs. 4, 5 and 6 a modified form of catheter is shown in which similar parts are similarly numbered, the outer tube 5 being provided with the bulbous portion 2, and with the hole 5 below the portion2. In this modification the outer end of the bore l is closed but provided with a bore la having an enlarged outer portion lb; and the outer end of the outer tube 5 is provided with slots 6 and l and throats 'Ba, la as in the preceding figures.

In this modification however, 'a metallic inner tube 8 is used (instead of the inner tube 4 in the preceding figures), said metallic tube 8 being sufficiently flexible to permit the catheter to follow the curvatures of the ureter tract when entering the body of the patient. Inner tube 8 passes into tube i through the hole 5 in the wall of tube l, and passes upwardly through the bore la in the outer end of tube 5. TubeB is provided with a flange 9 adjacent its outer end adapted to seat against the inner face of the outer end wall of tube l, indicated in Fig. 4. The flange 5 may be secured on the metallic inner tube 8 by soldering, welding, or in any other desired manner. at H], to receive a threaded collar it which seats in the enlarged bore lb at the outer end of the catheter, as shown inFig. l, the collaril being provided with diametrically opposed slots Ha (Fig. 6) whereby the collar may be rotated by means of a screw driver or the like to thread same on or off the end of the metallic tube 8.

By the above construction the outer end of tube 8 is confined within the outer end of tube 1 by the collar 5 l and the flange 9 on the tube 8. so that tube 8 cannot slip through the outer end of the tube. However, when tube 8 is pushed upwardly or outwardly with respect to the tube I the bulbous portion 2 will be stretched and thereby reduced in diameter. Hence the operation of the catheter shown in Fig. 4 is the same as that previously described in connection with Figs. 1 to 3; and the grooves 6 and '1 allow the treating solution to drain from the outer end as well as from the sides of the catheter, the treating solution being discharged from the catheter at the outer end of the tube 8.

In Figs. 7 and 8 a further modification 0f the The outer end of the tube 8 is threaded, as

tion may drain after being discharged into the tract from the outer end of bore lp of the catheter, in the manner described with respect to the preceding modifications. While the bore l p and the thickened portion im are preferably molded at the time the tube 1 is molded. the bore lp may be formed therein in any other desired manner such as by reaming or the like. 'I'heti'eating solution is introduced into the bore l p by insertion of a nozzle, leading from the supply, into the opening 5 provided in the wall of tube l.

I do not limit my invention to the exact forms shown in the drawings, for obviously changes may be made therein within the scope of the claims. a

I claim: 7 i

l. A catheter, comprising an outer flexible tube having a closed outer end; an inner tube within the outer tube discharging through the outer end of the outer tube, said inner tubehaving an inlet in the side of the outer tube adjacent its outer end, and said outer tube having recesses in its sides extending to its outer end having throats communicating with the bore of ,the outer tube around the inner tube.

2. In a catheter as set forth in claim 1, said inner tube being integral with the outer tube.

3. In a catheter as set 'forth in claim 1 said inner tube comprising a bore extending through an integral longitudinally thickened portion of the inner wall of the outer tube.

4. A catheter as set for in claim 1, said inner tube being metallic and having .a'flange adjacent its outer end engaging the inner face of the closed outer end of the outer tube;.said inner tube passing through a centralbore in the outer end of the outer tube; and having means thereonengaging the outer face of theouter endof'the outer tube to prevent withdrawal of the inner tube from said bore in the outer end of the outer tube.

5. A catheter as set forth in claim 1, said inner tube being metallic and having a flange adjacent its outer end engaging the inner face of the outer closed end'oi the outer tube,-said inner tube passing through a central bore in the outer end of the outer tube; and a tapped collar thereon engaging threads on the outer end of the inner tube; said collar being housed in an enlarged bore in the outer end of the outer tube.

6. A catheter, comprising an outer iflexible resilient tube having a closed outer end; an inner tube within the outer tube discharging through the outer end of the outer tube; said inner tube wardly through the outer tube adjacent its outer end; and said inner tube being relatively rigid; a resilient bulbous portion in the outer tube adjacent its outer end adapted to be reduced in diameter as the outer tube is stretched; and said inner tube being connected with the closed outer end of the outer tube, and adapted when shifted axially within the outer tube in one direction to stretch said outer tube.

7. In a catheter as set forth in claim 6, said inner tube being integral with the outer tube and having flexibility characteristics different from those of the outer tube.

8. A catheter as set forth in claim 6, said inner tube being metallic and having a flange adjacent its outer end engaging the inner face of the outer closed end of the outer tube, said inner tube passing through a central bore in the outer end of the outer tube; and having means thereon engaging the outer face of the outer end of the outer tube to prevent withdrawal of the inner tube from said bore in the outer end of the outer tube.

9. A catheter as set forth in claim 6, said inner tube being metallic and having a flange adjacent its outer end engaging the inner face of the outer closed end of the outer tube, said inner tube passing through a central bore in the outer end of the outer tube; and a tapped collar thereon engaging threads on the outer end of the inner tube; said collar being housed in an enlarged bore in the outer end of the outer tube.

10. A catheter, comprisin an outer flexible resilient tube having a closed outer end; an inner tube within and spaced from the walls of the outer tube and discharging through the outer end of the outer tube, said inner tube having an inlet in the side of the outer tube adjacent its outer end, and being relatively rigid; a resilient bulbous portion in the outer tube adjacent its outer end adapted to be reduced in diameter as the outer tube is stretched; said inner tube being connected with the outer end of the outer tube, and adapted when shifted axially within the outer tube in one direction to stretch said outer tube and thereby reduce said bulbous portion; and said outer tube having recesses in its sides extending to its outer end having throats leading into the bore of the outer tube around the inner tube. V

11. In a catheter as set forth in claim 10, said inner tube being integral with the outer tube and having flexibility characteristics different from those of the outer tube.

12. A catheter as set forth in claim 10, said inner tube being metallic and having a flange adjacent its outer end engaging the inner face of the outer closed end of the outer tube, said inner tube passing through a central bore in the outer end of the outer tube; and having means thereon engaging the outer face of the outer end of the outer tube to prevent withdrawal of the inner 6 tube from said bore in the outer end of the outer tube.

13. A catheter as set forth in claim 10, said inner tube being metallic and having a flange adjacent its outer end engaging the inner face of the outer closed end of the outer tube, said inner tube passin through a central bore in the outer end of the outer tube; and a tapped collar thereon engaging threads on the outer end of the inner tube; said collar being housed in an enlarged bore in the outer end of the outer tube.

14. A catheter, comprising an outer flexible resilient tube having a closed outer end and having an integral bulbous portion formed in its walls; an inner tube within and spaced from the Walls of the outer tube and passing outwardly through a perforation below the bulb; said inner tube being formed of flexible relatively rigid material; said bulbous portion being reducible in diameter as the outer tube is stretched; said inner tube being connected with and discharging centrally of the outer end of the outer tube and adapted when shifted axially to stretch within the outer tube in one direction said outer tube and thereby reduce said bulbous portion; and said outer tube having recesses in its sides extending to its outer end having throats leading into the bore of the outer tube around the inner tube.

15. In a catheter as set forth in claim 14, said inner tube being integral with the outer tube and having flexibility characteristics different from those of the outer tube.

16. A catheter as set forth in claim 14, said inner tube being metallic and having a flange adjacent its outer end engaging the inner face of the closed outer end of the outer tube, said inner tube passing through a central bore in the outer end of the outer tube; and having means thereon engaging the outer face of the outer end of the outer tube to prevent withdrawal of the inner tube from said bore in the outer end of the outer tube.

17. A catheter as set forth in claim 14, said inner tube being metallic and having a flange adjacent its outer end engaging the inner face of the closed outer end of the outer tube, said inner tube passing through a central bore in the outer end of the outer tube; and a tapped collar thereon engaging threads on the outer end of the inner tube; said collar bein housed in an enlarged bore in the outer end of the outer tube.

MINTON LARKIN SMITH.

REFERENCES CXTED The following references are of record in the of this patent:

UNITED STATES PATENTS Number Name Date 256,590 Pfarre Apr. 18, 1882 2,175,726 Gebauer Oct. 10, 1939 2,257,369 Davis Sept. 30, 1941 2,393,002 Smith Jan. 15, 1946

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