Title:
Gastroscope
United States Patent 2453862


Abstract:
This invention relates to gastroscopes Its object is to provide a. gastroscope having means for controllably flexing it in any direction within a stomach being examined. More specifically, my invention aims to provide a gastroscope having flexing means that is entirely enclosed in a flexible...



Inventors:
Frederic, Salisbury Peter
Application Number:
US75191347A
Publication Date:
11/16/1948
Filing Date:
06/02/1947
Assignee:
Frederic, Salisbury Peter
Primary Class:
Other Classes:
385/902
International Classes:
A61B1/005; A61B1/273
View Patent Images:
US Patent References:
0548462N/A1895-10-22
0373000N/A1887-11-08



Description:

This invention relates to gastroscopes Its object is to provide a. gastroscope having means for controllably flexing it in any direction within a stomach being examined.

More specifically, my invention aims to provide a gastroscope having flexing means that is entirely enclosed in a flexible outer sheath of the mid-section of the gastroscope, whereby the external surface thereof is smooth to facilitate insertion through the esophagus.

Other objects will become apparent in the ensuing specification and appended drawings in which: Fig. 1 is a side view of a gastroscope embodying my invention, parts being broken away and shown in section to better illustrate the internal structure thereof; Fig. 2 is a view of the control end of the gastroscope; Fig. 3 is a detail sectional view taken longitudinally through three separate portions of the gastroscope; Fig. 4 is an enlarged detail sectional view through a section of the gastroscope; and Fig. 5 is a transverse sectional view taken on the line 5-5 of Fig. 3.

As an example of one form in which my invention may be embodied, I have shown in the drawings a gastroscope embodying a rigid, tubular handle section 8, a flexible mid-section 7, and a tip section 8 having a viewing window 9 and a lens 13 for projecting into the stomach interior, illuminating rays from lamp mechanism contained within the tip section 8, and an outlet 8a .for injecting air into the stomach. The tip ;section 8 is of conventional structure and the details thereof are therefore not illustrated.

At the end of the handle section 6 is an eye piece i ., through which an operator may sight into the flexible mid-section 7. The mid-section 7 comprises a series of tube sections 12 each haying a lens 13 mounted in one end thereof, and each having at one end an annular outwardly extending flange 14 and its other end piloted in the adjacent end of an adjacent section. The piloting preferably utilizes a ball and socket connection 14a which maintains a pivot axis concentric with the center of the lens 13.

The tube sections 12 are enclosed within a flexible sheath 15 of conventional helically coiled metallic ribbon, and the sheath 15 is enclosed within a tube 18 of resilient material such as soft rubber, which tube is in turn enclosed within an outer tube 17 of similar material.. An annular air space between the tubes S1 and 17 provides a passage for the flow of air into the tip 8. The flanges 14: bear loosely against the-inner surface of the sheath 1:5, and the tube, sections 12 are '5 thereby maintained in. concentric relation to the sheath, 15, with the lenses 13 disposed on a common- optical axis (each lens focused upon a succeeding lens).

Each flange-'14 is provided with a plurality. of '10 bearing apertures 1.8 of equidistant circumferential spacing. The number- of the apertures 14S in each flange may range from, three upwardly; although. I prefer to employ four apertures.

Through the apertures. 18 .are extended a. pluralityof operating cables -19, each having one end anchored- to the lowermost section 412 and its other end. extending through an opening 23: in the handle member 6-and'secured to an,operating ring. The operating ring comprises a rim 21 and a plurality of spokes each embodying a tubular portion 22 secured to the rim2 1 and a. shaft portion 23. telescoped in the tubularl portion. 22 .At the inner end of the shaft portion.2,3 are:,arĂ½uate shoes 24 which are slidably .engaged: in. ways 25 in a band 2- which encircles.and.is securedito the handle shaft ... Each shaft 23 is uAged inwardly by a coil spring 27 compressed between its outer end and the rim 21 and received in the..ubular spoke member 22.

The band 2. is in: the form of an. equatorial section of sphere with a cylindrical bore thenethrough, and the ways 25 are, arcuately .concentric to the center, of the sphere. Consequently, the rim 21 will be maintained at all times concentric with the spherical center of the band 26, while being free to tilt in any direction, about this center. The arcuate shoes 24 prevent bodily dis4placement of the plane of the rim 21 from the center of the sphere, and prevent rotation of the rim 21 about the handle shaft S while freely permitting non-rptational pivotal (tilting) movement.

The flexible tubes 16 and. 1,7 may be fixed to the handle shaft. B and tip 8 in. any conventional manner, such as by means of ferrules. 28 and 29.

An air hose 33 may be connected .to. the handle tube 6 through an adapter 34,.and may communi60 cate with the. annular space.between the tubes 16 and 17, through a duct 35. A duct ,or iducts,.S in the tip member 8 may ipt turn establish communication between the annular space and the interior of the tip, from which air pumped through the tube 33 may. escape through opening 8a into the stomach to inflate the stomach for the purpose of examination.

It may now be noted that the sections 12 are floatingly mounted in the sheath 15, free for limited endwise movement and free to tilt with reference to each other as the sheath 15 and tubes 16, 17 are flexed along an arcuate longitudinal axis. The cables 19, passing freely through the openings 18 in the flanges 14, act upon the sections 12 by drawing them closer together at one side thereof while allowing the other side to expand. This is accomplished by tilting the ring 21. For example, if the ring 21 is tilted in a clockwise direction as viewed in Fig. 1, and as indicated by the dotted lines shown in that figure, the cable 19 on the left side of Fig. 1 will be drawn toward the eye piece end of the instrument while the cable on the opposite side will be slacked off and permitted to move toward the tip end of the instrument. The result will be an arcuate flexing of the instrument toward the left as indicated by the dotted lines in Fig. 1.

The lamp mechanism in the tip 8 is energized by an insulated current conductor 30 entering the instrument through a switch casing 31 and passing downwardly to the tip portion 8 between the sheath 15 and tube 16. It may be wound helically about the sheath 15 in a conventional manner. The other side of the circuit may, in accordance with conventional construction, utilize the metal sheath 15. A switch in the casing 31 may be actuated by an actuator 32.

A diagonally disposed mirror 37, mounted in the tip section 8 in any suitably conventional manner, reflects the image coming through the window 9 into the articulated optical tube structure, and thence to the eye piece 11.

The uppermost section 12 is abutted against a shoulder 38 in the tube 6, to resist the pull of cables 19. The ball and socket connections 14a constitute pivotal end thrust bearing members which also resist the pull of the cables while permitting each adjacent pair of tube sections 12 to pivot about an axis located at the center of a lens 13, whereby the pull of a cable at one side will set up a couple, or turning moment, between each pair of sections, resulting in the flexing of the mid-section 7.

I claim: 1. In a gastroscope, a tubular handle shaft having an eye piece, a flexible tubular mid-portion connected to said handle shaft, a tip portion connected to said mid-portion and having a viewing window, means in said flexible mid-portion for transmitting to said eye piece an image received through said window, an operating ring having a universally tiltable connection to said handle shaft, and a plurality of cables connecting said ring to said tip portion and extending inside of said flexible tubular mid-portion, for transmitting flexing movement to said mid-portion.

2. In a gastroscope, a tubular handle shaft having an eye piece, a tubular flexible mid-portion joined to said handle shaft, a tip portion connected to said mid-portion and having a viewing window, a plurality of tube sections within said flexible mid-portion, each of said tube sections carrying an image transmitting lens, an operating member having a universally tiltable connection to said handle shaft, and a plurality of cables connecting said operating member to said tip portion for transmitting to said flexible midportion, flexing movement in any selected direction.

3. In a gastroscope, a tubular handle shaft having an eye piece, a flexible tubular mid-portion joined to said handle shaft, a tip portion connected to said flexible tubular mid-portion and having a viewing window, a plurality of tube sections arranged end to end in said flexible midportion and each having an image transmitting lens and an annular flange projecting outwardly and having bearing engagement with the inner surface of said flexible mid-portion for spacing its respective tube sections from the inner surface of said mid-section, said flanges each having a plurality of apertures therein, an operating member having a universally tiltable connection with said handle shaft, and a plurality of operating cables connecting said operating member to said tip portion and extending through the apertures in said flanges.

4. In a gastroscope, a tubular handle shaft having an eye piece, a flexible tubular mid-portion joined to said handle shaft, a tip portion joined to said flexible tubular mid-portion and having a viewing window, a plurality of tube sections arranged end to end in said flexible mid-portion and each having a lens for transmitting from said viewing window to said eye piece an image received through said viewing window, each of said tube sections having at one end an annular flange engaging the inner surface of the flexible mid-portion and spacing the tube sections from said inner surface to provide a series of annular spaces, an operating member having a universally tiltable connection with said handle shaft, each of said flanges having a plurality of circumferentially spaced apertures therein, and a plurality of operating cables connecting said operating member to said tip section and extending through said apertures and said annular spaces.

5. In a gastroscope, a tubular casing means including a flexible mid-section and a tip portion having a viewing window, means in said flexible mid-section for transmitting through said casing means an image received through said viewing window, said means comprising a plurality of tube sections each having an image transmitting lens and each having means spacing it from the inner wall of said flexible mid-section to provide an annular space, said spacing means providing a plurality of annularly spaced apertures connecting said annular spaces, an operating member having a universally tiltable connection with said casing means, and a plurality of cables connecting said operating member to said tip portion and extending through said apertures in said spacing means and through said annular spaces. 6. In a gastroscope, a tubular handle section having an eye piece, a tubular flexible mid-section joined to said handle shaft, a tip portion joined to said tubular mid-section and having a viewing window, means in said mid-section for transmitting from said window to said eye piece an image received through said window, said means including a plurality of tube sections arranged end to end within said mid-section and each having an image transmitting lens and means spacing the same from the inner wall of said mid-section to provide a series of annular spaces, an operating ring having a universally tiltable connection with said handle shaft, said connection comprising a plurality of spring expanded telescoping spoke members connecting said ring to said handle shaft, and a plurality of operating cables connected to said operating ring and to said tip portion and extending through said annular spaces, for transmitting from said operating ring to said flexible midportion, flexing movement in any selected direction, for shifting said tip section from side to side.

7. A gastroscope as defined in claim 6 wherein said telescoping spoke members each comprise a sleeve portion rigidly secured to said operating ring and a shaft portion telescoped into said sleeve portion, and a coil spring under compression within said sleeve portion between the end of said shaft portion and said ring. PETER FREDERIC SALISBURY.

REFERENCES CITED The following references are of record in the file of this patent: UNITED STATES PATENTS Name Date Wolf ------------ July 12, 1930 Schranz ----------- Apr. 28, 1941 r?* < * t