US3776222A - Fiber optic entubator and method of entubation of the trachea through the nasopharynx - Google Patents

Fiber optic entubator and method of entubation of the trachea through the nasopharynx Download PDF

Info

Publication number
US3776222A
US3776222A US3776222DA US3776222A US 3776222 A US3776222 A US 3776222A US 3776222D A US3776222D A US 3776222DA US 3776222 A US3776222 A US 3776222A
Authority
US
United States
Prior art keywords
endotracheal tube
nasopharynx
entubator
patient
distal end
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Inventor
J Smiddy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LUROSSO A
Original Assignee
LUROSSO A
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LUROSSO A filed Critical LUROSSO A
Priority to US21138871A priority Critical
Application granted granted Critical
Publication of US3776222A publication Critical patent/US3776222A/en
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

Links

Images

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/267Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for the respiratory tract, e.g. laryngoscopes, bronchoscopes
    • A61B1/2676Bronchoscopes
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00163Optical arrangements
    • A61B1/00165Optical arrangements with light-conductive means, e.g. fibre optics
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/005Flexible endoscopes
    • A61B1/0051Flexible endoscopes with controlled bending of insertion part
    • A61B1/0055Constructional details of insertion parts, e.g. vertebral elements
    • A61B1/0056Constructional details of insertion parts, e.g. vertebral elements the insertion parts being asymmetric, e.g. for unilateral bending mechanisms
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/06Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
    • A61B1/07Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements using light-conductive means, e.g. optical fibres
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/04Tracheal tubes
    • A61M16/0488Mouthpieces; Means for guiding, securing or introducing the tubes
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/04Tracheal tubes
    • A61M16/0461Nasoendotracheal tubes

Abstract

An entubator for an endotracheal tube which includes a coherent flexible fiber optic bundle which can be positioned within the central cavity or lumen of the endotracheal tube for viewing the anatomy of a patient as the endotracheal tube advances through the patient during the insertion procedure. The entubator also includes a means for directing the course of travel of the endotracheal tube which enables the operator to navigate the endotracheal tube through anatomical passageways made visible by the fiber optics bundle. The fiber optic bundle and the means for directing the course of travel enable the entubation of an endotracheal tube through the nasopharynx of the patient. Method of entubing an endotracheal tube through the nasopharynx.

Description

zsati amze SR XF: 3 1776 ,222 e SEARCH ROOM United Stat 1 1111 3,776,222

smiddyi I SUBSTITUTE FOR MISSING XR 4e 1973 FIBER OPTIC ENTUBATOR AND METHOD Primary Examiner-Lawrence W. Trapp OF ENTUBATION OF THE TRACHEA Atl0rney-Anth0ny M. LOrussO THROUGH THE NASOlHARYNX [75] Inventor: Joseph F. Smiddy, Bethesda, Md. [57] ABSTRACT [73] As g An h y LUIOSSO, Belhesda. An entubator for an endotraeheal tube which includes a par in er a coherent flexible fiber optic bundle which can be [22] Filed: Dec. 23 1971 positioned within the central cavity or lumen of the endotracheal tube for viewing the anatomy of a pa- [21] Appl. No.: 211,388 tient as the endotracheal tube advances through the patient during the insertion procedure. The entubator also includes a means for directing the course of travel liil li'i'ftiiiiiiiiiiii:311i:If???liffififili lfi ef ehe eeeeeeeheel eeee whee eeeelee ehe 58 Field of Search 128/6 8, 351, 303.1, navigate the endolrfcheal tube through f 128/348 passageways made visible by the fiber optics bundle.

The fiber optic bundle and the means for directing the course of travel enable the entubation of an endotra- [56] References Cited UNITED STATES PATENTS cheal tube through the nasopharynx of the patient.

3 677 262 7 1972 Zukowski 128/351 Method of emubing endotmchcal tube through 3:6 0:231 10/1971 Takahashi... 128/6 nasophary 3,669,098 6/1972 Takahashi 128/6 m Claims 5 Drawing Figures OTHER PUBLICATIONS P. Murphy-Anaesthesia Vol. 22, No. 3 July 1967 pp. 489-491 PATENTEUUEC 4191s WEET 1EF 2 FIG.

ATENTED DEB 4 I975 SHEET 2 [F 2 FIBER OPTIC ENTUBATOR AND METHOD OF ENTUBATION OF THE TRACHEA THROUGH THE NASOPHARYNX BACKGROUND OF THE INVENTION The field of this invention is a therapeutic instrument for treating patients who require mechanical ventilation.

It is a standard medical procedure to insert an endotracheal tube into patients who are unable to breathe for themselves because of diseased statesto provide mechanical ventilation. For example, when a patient has suffered a heart attack, a stroke, severe pneumonia, or an epileptic seizure, mechanical ventilation may be required and thus an endotracheal tube is often inserted into the patient having these diseased states. The insertion of such a tube is also a standard medical procedure which is performed whenever general anaesthetics are administered or whenever routine surgery is required.

The standard method for performing an entubation of an endotracheal tube is to place the patient in 21 prone position, tilt his head backwards as far as possible, and insert a metal laryngoscope through the patients mouth. The endotracheal tube is then passed alongside the metal laryngoscope and while the patient's vocal cords are viewed through the laryngoscope, the tube is passed through the vocal cords.

The foregoing procedure is painful and requires either general and/or local anaesthetics. Furthermore, well recognized complications arising from the use of the metal laryngoscope include neck fractures, aspiration of vomit into the lungs, jaw fracture, and the breakage of teeth during insertion of the laryngoscope. in addition to the foregoing disadvantages, the procedure described above is difficult to perform in patients who are obese, who have malformations of the jaw, or who have a disease or fractures of the cervical spine. In fact, it is so difficult to entube an endotracheal tube with a laryngoscope that death has occurred in some patients during the attempt to place the endotracheal tube into the trachea. Such deaths have occurred because of the insufficient flexibility and capability of the laryngoscope to rapidly and quickly place the tube into the trachea.

When the endotracheal tube cannot be placed into the trachea with the use of the metal laryngoscope, it is common medical procedure to perform a tracheostomy. A tracheostomy consists of cutting a hole in the base of the neck and inserting a breathing tube into the trachea through the hole.

The foregoing disadvantages are greatly reduced by utilizing the entubator of the present invention which is capable of inserting the tube into the trachea through the patients nasopharynx while the patients head rests in a natural position without using a laryngoscope and' without causing significant trauma to the patient. Entubment is faster, safer and easier to perform using the entubator of the present invention than entubment using instruments such as the laryngoscope.

Such an entubation is possible with the entubator of the present invention because the entubator includes a means, in the form of a flexible coherent fiber optic bundle within the endotracheal tube itself, for viewing the anatomy of the patient as the endotracheal tube advances into the nasopharynx and a means for directing and controlling the course of travel of the endotracheal tube to avoid obstructions which are made visible through the fiber optics bundle and thus enable the operator to navigate the tube through the natural passageway formcd by the nasopharynx,

The medical literature is replete with references disclosing medical devices which include coherent flexible fiber optic bundles, or fiberscopes as they are often called.

Representative of such devices is the well known fiber optic bronchoscope which is a diagnostic instrument and which comprises a rubber tube containing light guides in the form of flexible fiber optic bundles and a tip which is remotely controllable to increase the field of view once the instrument is inserted into a patient. Although this instrument includes a flexible fiber optic bundle, that bundle's function begins once the tube is inserted. in this regard, the manufacturers of these instruments recommend that the instrument be insertedthrough a straight metal tube bronchoscope or through an endotracheal tube which has been inserted into a patient with a metal laryngoscope. Thus, the flexible fiber optic bundle is not intended to facilitate the insertion of the instrument.

Although the fiberscope portion of the fiber optic bronchoscope was not designed nor intended to function as a means for facilitating insertion of the instrument, applicant has devised a procedure for performing bronchoscopies where the fiberscope portion of the fiber optic bronchoscope does in fact function as a means for facilitating the insertion of the instrument. Since this procedure has many similarities to the present inventive method of entubing endotracheal tubes, it is amplified below in connection with the entubment procedure of the present invention.

Although the literature contains many publications disclosing medical instruments which include fiberscopes, very few instruments are disclosed or are shown in which the fiberscope system of the instrument actually is utilized as an aid to facilitate insertion of the instrument itself.

A patent which discloses an instrument where a fiber optic system is utilized to facilitate insertion of the instrument is US. Pat. No. 3,572,325 to Bazell et al. entitled Flexible Endoscope Having Fluid Conduits and Controls." The device disclosed in the Bazell et a]. patent is an adaptation of a sigmoidoscope which is flexible and which includes a fiber optic system and a control assembly to navigate the distal tip of the instrument into a patients colon. it should be noted, however, the the instrument disclosed in the Bazell et al. patent is an adaptation of a previously existing instrument, a sig moidoscope, and unlike the instrument of the present invention is designed and intended to enter into a patient's body through the same anatomical passageway as the sigmoidoscope of which it is an adaptation would enter. Furthermore, the advantages of providing a flexible sigmoidoscope had been long recognized, particularly since the colon into which the instrument is inserted has a natural configuration which renders straight rigid instruments undesirable.

in the device disclosed in the Bazell et al. patent, the fiber optic system and control assembly facilitate the insertion of this flexible instrument. As stated above, however, providing flexibility features on this type of instrument were known to be desirable.

It should, of course, also be noted that although there is some similarity between the device of the present invention and the Bazell et al device in that the Bazell et al device, as well as the device of the present invention, includes a fiber optic system for viewing the passageway during the insertion of the instrument and control means for navigating the instrument in response to the view of the passageway made visible by the fiber optic system, the device of Bazell et al could never serve as a means for entubing an endotracheal tube through any opening in the body let alone through the nasopharynx. In this regard, it is the entubment of the endotracheal tube through the nasopharynx and into the trachea toward which the present invention is directed.

Also representative of prior art medical instruments which include fiberscopes as a part of the instrument are the devices disclosed in US. Pat. No. 3,434,775 to N. R. Gosselin entitled Flexible Fiber Optic Borescope" and the device disclosed in US. Pat. No. 3,494,354 to Ryosuke Yokota et al. entitled Flexible Endoscope for Use in Cancer Diagnosis." These patents, however, are not believed to be pertinent to the present invention.

SUMMARY Many of the disadvantages of the prior art entubators for endotracheal tubes are overcome by the method and device of the present invention which involves an entubator for an endotracheal tube which enables insertion of an endotracheal tube into the trachea through the patients nasopharynx.

Accordingly, it is an object of the present invention to provide a new and improved entubator for placing an endotracheal tube into the trachea.

A further object ofthe invention is to provide an entubator with which an endotracheal tube can be inserted into the trachea without the use of a laryngoscope.

A further object of the present invention is to provide an entubator for an endotracheal tube which can entube an endotracheal tube into the trachea through the patients nasopharynx.

Another object of the present invention is to provide an entubator for an endotracheal tube which enables the entubation of the endotracheal tube while the patient's head rests in a natural position.

Another object of the present invention is to provide an entubator for an endotracheal tube which enables the entubation of the endotracheal tube without tilting the patients head backwards,

Another object of the present invention is to provide an entubator for an endotracheal tube which can entube an endotracheal tube into patients who have fractures of the cervical spine without performing a tracheostomy.

A further object of the present invention is to provide a new and improved device for the examination and evacuation of the trachea.

Still another object of the present invention is to provide a new method for entubing an endotracheal tube into the trachea.

A further object of the present invention is to provide a method for entubing an endotracheal tube without the use of a laryngoscope.

Another object of the present invention IS to provide a method for entubing an endotracheal tube while the patients head rests in a natural position.

Another object of the present invention is to provide a method for entubing an endotracheal tube without tilting the patients head backwards.

Another object of the present invention is to provide a method for entubing endotracheal tubes in patients who have fractures of the cervical spine without performing a tracheostomy.

Still another object of the present invention is to provide a method for entubing an endotracheal tube into a patients trachea through the patients nasopharynx.

A further object ofthe present invention is to provide a new and improved method for the examination and evacuation of the trachea.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a side elevational view partially in section of an entubator in accordance with the present invention positioned within an endotracheal tube;

FIG. 2 is a transverse sectional view, on an enlarged scale, taken along line 22 of FIG. 1;

FIG. 3 is a longitudinal sectional view taken along line 33 of FIG. 2;

FIG. 4 is a perspective view showing entubment of an endotracheal tube with the entubator of FIG. 1 in a patient through the patients nasopharynx; and

FIG. 5 is a side elevational view of an embodiment of an entubator in accordance with the present invention positioned within an endotracheal tube.

DESCRIPTION OF THE PREFERRED EMBODIMENTS As stated above, the insertion of tubes into patients through the patients mouth has resulted in a number of significant problems.

After considering these problems, applicant con-, cluded that one way to provide greater safety and less discomfort for the patient during entubment would be to utilize a flexible entubator with a built in viewing system. However, even with such a flexible entubator, complications still occur when the flexible instrument is inserted into the patient through the patients mouth.

In particular, when any instrument, whether flexible or not, is placed on the back of a patients mouth, a strong gagging sensation results. Furthermore, it is difficult to anacsthesize against this gagging sensation. This complication creates problems because a patients normal response to this gagging sensation is a motion of the tongue which displaces the instrument. It, of course, can be easily appreciated that such displacement of. the instrument is undesirable.

Another complication resulting from passage of an instrument through the mouth is that a patient has a tendency to bite the instrument. This tendency has a deleterious effect on fiberscopes in that biting disturbs the" transmission of an image through the fiberscopg; and can damage the fibers in the fiberscope. Thus, a fiberscope which is inserted into a patients mouth is normally shielded against possible damage from biting. Such shields, however, can reduce the advantage gained by the flexibility properties of the fiberscope since such shields are not normally as flexible as the fiberscope.

After considering these problems, applicant conceived of by-passing the mouth completely by inserting a flexible instrument into the trachea through the nasopharynx. To test this procedure, applicant passed a fiber optic bronchoscope into the trachea through the nasopharynx and has repeatedly utilized this technique involving transnasal passage of this instrument for the diagnosis of pulmonary disease.

Broadly, this technique is accomplished by spraying local anaesthetics directly into the nose and throat, lubricating the distal end of the bronchoscope with an anaesthetic jelly and thereafter passing the flexible fiber optic bronchoscope through the nasopharynx into the trachea while the passageway of the nasopharynx is viewed through the bronchoscope itself.

In the preferred procedure for transnasal passage of the instrument, the patients nose and throat are sprayed with one-quarter per cent tetracaine solution. The distal end of the instrument is coated lightly with anaesthetic jelly. The instrument is passed through the nasopharynx under direct visualation. The instrument is placed over the vocal cords and they are sprayed with local anaesthetic, after which the instrument is passed on into the trachea. Examination of all segments of the bronchial tree is carried out with the patient seated with his head in a resting position.

Patient acceptance of this procedurehas been excellent and there have been no significant complications. The flexible bronchoscope is of utmost utility in the performance of diagnostic bronchoscopy on patients with cervical osteoarthritis; cervical fractures, aortic aneurysm, bleeding and clotting disorders, hypoxia, and other situations where standard bronchoscopy with the rigid bronchoseope might be contraindicated.

Since a skilled physician is familiar with the anatomy of the transnasal passageway of the nasopharynx, an instrument can be guided, manipulated, or navigated through the passageway if the passageway is viewed during the insertion of the instrument. Of course, this factor presents no problem in the case of fiber optic bronchoscopes since a fiber optic viewing system is contained in this instrument.

Applicant has presented this procedure in papers delivered before several national medical meetings. The first paper on the transnasal passage of a fiber optic bronchoscope through the nasopharynx was delivered by applicant at The Thirtieth Veterans Administration- Armed Forces Pulmonary Disease Research Conference in Cincinnati, Ohio, on Jan. 26, I971. A report on the paper delivered at that conference appears on page 865 of the publication American Review of Respiratory Disease," Vol. 103, No. 6, June 1971, the teachings of which are herein incorporated by reference.

On Oct. 26, I971, at the Third Fall Scientific Assembly of the American College of Chest Physicians, applicant delivered a similar paper directed to the transnasal passage of a fiber optic bronchoscope. An abstract of the paper delivered at that assembly entitled The Utility of the Flexible Fiberoptic Bronchoscope" appears in the publication Chest," Vol. 60, No. 3, Sept. I971, pages 303-304, the teachings of which are also herein incorporated by reference.

Having found that transnasal passage of a fiber optic bronchoscope clearly reduced many of the problems attendant with oral passage of this instrument, applicant concluded that many of the problems attendant with oral passage of an endotracheal tube would also be greatly reduced by transnasal passage of the endotracheal tube itself.

To demonstrate the foregoing, applicant constructed a test model entubator for entubing an endotraeheal tube through the nasopharynx and entubed a number of cndotracheal tubes in various patients with this test model entubator by passing the endotracheal tubes through the patients nasopharynx into the trachea.

The test model entubator used in these entubments and an endotracheal tube are shown in FIGS. 1-4 ofthe drawing. In FIGS. 1-4, an endotrachcal tube is generally dcsignated by reference numeral 10. Endotrachcal tube 10 is a standard commercially available endotra-,

cheal tube formed of a flexible hard rubber, is tubular, arcuate in shape and has a hollow metal connector 12 fitted into the inner wall of tube 10 at its proximal end 14. Once the tube is positioned in the trachea, the metal connector 12 provides the means for connecting the air line of a mechanical ventilator (not shown) to tube 10 to deliver air through the endotracheal tube to the patient.

For most applications, cndotracheal tube 10 is fitted with a rubber cuff (not shown). The rubber cuff, which is inflatable, is slipped over distal end I6 of tube 10 prior to entubment. The purpose of the inflatable rubber cuff is to prevent leakage of air around the outside of the endotracheal tube once the endotracheal tube is placed in the trachea. Such leakage is prevented by inflating the cuff after the tube including the cuff is inserted into the trachea. However, since the features of such a cuff are well known in this art and since its use has no connection with the present invention, the cuff is not shown in the drawing, although in the entubment s described below, the endotracheal tubes were fitted with such a cuff.

The test model entubator used in various tests in which tube 10 was entubed into patients by passing the tube through their nasopharynx and into their trachea comprised a viewing means for viewing the anatomy of the nasopharynx as the tube passed therethrough and a means for directing the course of travel of the endotracheal tube to avoid obstructions made visible by the viewing means. In the test models constructed for these tests, the viewing means utilized was a commercially available fiber optic bronchoscope generally designated in FIGS. 1-4 by reference numeral 18. The fiber optic bronehoscope used in these tests was an Olympus Model BF fiberscope. This instrument has a transmission cable 19 with a working length of 55.7 cm, an outside diameter of 5 mm and a remotely controllable tip which moves through a range of upward and 30 downward. The mechanism for moving the tip of cable 19 which is a tension wire is not shown in the drawing since the details of this mechanism are well known in this art. Furthermore, that mechanism is not capable of t Transmission cable I9 of bronchoscope 18 also contains a I mm suction channel 21. Channel 21 is open at distal end 26 and the other end is connected to a connector or nipple 23 formed in handle 40 of the hronchoscopc. During the entubmcnt procedure, a

local anaesthetic is injected into the patient from a syringe which is attached to connector 23.

Because of the small diameter of transmission cable 19, it is easily positioned within cavity or lumen 20 which is formed by inner wall portion 22 of tubular wall 24 and the inner wall portion of metal connector 12. As is shown in FIG. 1, cable 19 is positioned so that it extends into and through the entire length of the lumen of tube 10, from its proximal end 14 to its distal end 16. Since the diameter of that portion of cavity or lumen 20 formed by inner wall portion 22 is approximately 9 mm, a reasonably good fit results when cable 19 with an outside diameter of mm is positioned within tube 10. In the test models, cable I9 was positioned within tube 10 so that the distal end 26 of cable 19 extended just beyond the distal end 16 of tube 10, as is shown in FIG. 1. Thus, the viewing means of the entubator of the present invention is positioned within the lumen of the endotracheal tube.

In the test models, the means for directing the course of travel of tube 10 comprised a thin nylon line 28. Prior to insertion of cable 19 into endotracheal tube 10, line 28 was passed into cavity 20 so as to run through the inside of the entire length of tube 10. The two ends of line 28 were then knotted outside of the tube as is shown at 29 to form a loop, part of which extended through the lumen ofv tube 10. Line 28 was knotted in a manner so as to allow sufficient slack to permit endotracheal tube 10 to remain in its natural areuate configuration when no pressure was exerted along line 28. It should be noted that the size of line 28 is greatly exaggerated in the drawing. A suitable line is 6 lb. test nylon monofilament line with a diameter which is less than 0.5 mm.

Since endotracheal tube 10 is arcuate in shape, a downward force applied at about point 31 in the direction of arrow 33, causes a downward displacement of the distal end 16 of the are formed by the endotracheal tube. With tube 10 positioned as is shown in solid lines in FIG. 1, such displacement of tube 10 is in the plane of the drawing and is along the route indicated in FIG. 1 by arrow 35 from the natural position of tube 10 shown in solid lines to the position shown in dotted lines. To apply such force during entubment, the operator places his finger at location 31 through the loop formed by line 28 and applies a gentle force in the direction of arrow 33, thus displacing the position of endotracheal tube 10. As suggested above, line 28 enables displacement in one plane. However, in the tests, such displacement of endotracheal tube 10 proved to be satisfactory to enable entubment through the pa tients nasopharynx since displacements in directions other than the one shown in the drawing are possible by turning the endotracheal tube during entubment to cause the distal end 16 of tube 10 to point in the gen eral direction toward which displacement is desired. Thus, by a combination of turning endotracheal tube 10 and applying a force along line 28 in the direction of arrow 33, it was possible to navigate the endotracheal tube through the passageway formed by the nasopharynx.

Further details of fiber optic bronchoscope 18 are shown in FIGS. 2-4 and include an image trargmitting bundle 32, light source bundle 34 and a*flexi6l'e suaion ciTirrrreizi, fiira'rwhrcirark enclosed by a flexible plastic tubular covering 36. Although in FIGS. 2 and 3 bundles 32 and 34 appear as if they are solid rods, it should i 26 is reproduced upon the face at the opposite end of the bundle. Since the light source bundle 34 does not transmit an image, flexible bundle 34 need not be coherent. It should be understood, however, that light source bundle 34, if coherent, would function to conduct light but the cost of manufacturing and assembling coherent bundles exceeds the cost of manufacturing non-coherent bundles. Since the only function of bundle 34 is to conduct light, .this bundle is not normally coherent. The fibers which comprise both bundles 32 and 34 are formed of a transparent material such as glass and operate on the principle of total internal reflection. This principle is so well known that it requires only a brief description. A transparent elongated smoothsurfaced body of higher refractive index than its surroundings can transmit light applied to one end so that it emerges with little loss at the other end, due to total internal reflection from its surfaces, of light rays divergent from the longitudinal axis of the body. To produce total internal reflection within each fiber, each fiber is formed of a central glass core surrounded by a thin sheath or cladding of glass having a lower refractive index than the core. Although glass fibers are preferred, light guiding fibers may be formed of transparent plastics. However, the construction of bundles of light guiding fibers from either glass or plastic is well within the skill of those in this art.

The transmission cable 19 comprised by covering 36, bundles 32 and 34 and channel 21 extended to and into handle 40 of bronchoscope 18. The image transmitting bundle 32 passes through handle 40 to an eye piece 42. Light source bundle 34 passes through the side of handle 40 and is enclosed by a protective plastic covering I 41. The assembly comprised by covering 41 and bundle 34 is connected to a fiber optic illuminator (not shown). Light from the illuminator is conducted through the fibers in bundle 34 to the distal end 26 of cable 19 t0 enable the scene to be viewed through bundle 32 to be illuminated.

The first entubment of an endotracheal tube utilizing the foregoing entubator is shown in FIG. 4 and was performed on a patient who had suffered respiratory failure and required mechanical ventilation.

With the patient seated in bed, his head was placed in a comfortable position and his nose was then sprayed with a local anaesthetic while he remained seated in an upright position in his bed. A suitable local anaesthetic which can be used for this step is a l per cent xylocaine solution. I

A nylon line was then looped through the lumen of an endotracheal tube and knotted in the manner which is described above and which is shown in FIG. 1. The distal end of the endotracheal tube was lubricated with an anaesthetic jelly and thereafter about one-half of an inch of the distal tip of the tube was inserted into the patients nose. A suitable anaesthetic jelly which can be used to lubricate the tube is xylocaine jelly. With the tip of the endotracheal tube inserted slightly into the patients nose a fiber optic bronchoscope was then in serted through the lumen of the endotracheal tube so that the distal end of the bronchoscope extended just beyond the distal end of the endotracheal tube as is shown in FIG. 1 so that the passage of the endotracheal tube through the nasopharynx could be observed.

In this entubment procedure, the endotracheal tube with the looped nylon line were placed into the patients nose prior to the insertion of the fiber optic bronchoscope. Alternatively, the bronchoscopc and nylon line can be assembled within the endotracheal tube as is shown in FIG. 1 prior to the insertion of the endotracheal tube into the patients nose. Whether this technique is utilized or whether the foregoing tech nique is utilized is merely an operators preference. The important point, however, is an endotracheal tube cannot be safely inserted very far into a patients nasopharynx without the operator being able to see the natural passageway of the nasopharynx.

With the entubator assembled, the endotracheal tube was then manually navigated through the nasopharynx while the passage of the tube was viewed through the fiber optic bronchoscope. As the natural anatomical passageway formed by the nasopharynx was observed through the fiber optic bronchoscope, that passageway was navigated by flexing the distal endof the endotracheal tube by pulling the looped nylon line, by turning the endotracheal tube so that the end of the tube pointed in the general direction of the passageway, or by a combination of turning and flexing the distal end of the tube. After the distal tip of the tube was pointed in the desired direction, the operator gently pushed the tube into the passageway. If any obstructions in the nasopharynx were viewed, such obstructions were cleared in the same manner.

When the patient's vocal cords were visualized, a local anaesthetic solution was passed through the channel of the bronchoscope onto the vocal cords.

To anaesthetize the vocal cords, a 1 percent xylo caine solution is put into a syringe. The syringe is then connected to the nipple or connector on the bronchoscope. The xylocaine solution is then delivered from the syringe and after passing through the channel is sprayed on the vocal cords.

After allowing sufficient time (about 3 minutes) for the anaesthetic to take effect, the endotracheal tube was pushed through the vocal cords while the vocal cords were viewed through the bronchoscope. After passing the tube through the vocal cords the tube was positioned in the trachea.

Once the endotracheal tube was positioned in the trachea, the fiber optic bronchoscope and the nylon line were removed. The endotracheal tube was then connected to a mechanical ventilator to provide the venti lation required by the patient.

Endotrachcal tubes were positioned in patients by passing the endotracheal tube through the nasopharynx in accordance with the present invention. The patients in-whom tubes had been inserted in this manner tolerated the procedure very well. The patients response was considered good and there were no complications noted from this procedure. As compared to the prior art method of oral entubment with a laryngoscope, by following the present invention there was an increase in the speed of passage of the tube. Such increased speed of passage decreased the amount of pain normally incurred by a patient when endotracheal tubes are entubed with a laryngoscope.

At this point it should be noted that endotracheal tubes have in the past been passed through the nasopharynx. Such passage has been accomplished by using one or two known techniques. The first technique is to blindly stuff the endotracheal tube through the nasopharynx into the trachea. This technique is not consid ered to be satisfactory since the passage of the tube through the nasopharynx cannot be observed and is normally performed only in emergency situations. The other prior art technique for passing an endotracheal tube through the nasopharynx is to use a laryngoscope which is placed in the patients mouth to illuminate the vocal cords. This technique has many deficiencies when compared to the method of the present invention. In particular, all the disadvantages arising from oral passage of the endotracheal tube with the use of a laryngoscope are still present when a laryngoseope is employed. Merely by way of cxample, the patient's head must be tilted back in order to insert the laryngoscope. In addition, this procedure is not acceptable because the passage of the nasopharynx cannot be viewed.

It should be noted that the entubator described above was constructed to demonstrate that endotracheal tubes could be safely entubed into the trachea through a patients nasopharynx. In this regard, the entubator described above was capable of successfully entubing endotracheal tubes in a number of patients by passing the endotracheal tube into the patients nasopharynx. It is here emphasized, however, that the entubator described above is merely a demonstration model constructed from components that were readily available to enable the foregoing tests. That model, however, was sufficient to indicate the essential components necessary for carrying out the objects of this invention. Those components include a viewing means for enabling the observation of the natural passageway fomied by the nasopharynx, a means for navigating the endotracheal tube through that passageway and a conduit or channel for delivering an anaesthetic into the patient as required during entubmcnt. All of these components are preferably assembled to form an entubator which can be positioned within the lumen of the endotracheal tube.

A more sophisticated embodiment of the invention which contains the foregoing essential elements is shown in FIG. 5 ofthe drawing. In FIG. 5 the entubator is generally designated by reference numeral 50 and is shown positioned within the lumen of an endotracheal tube 10. The endotracheal tube 10 shown in FIG. 5 is identical to the endotracheal tube shown in FIG. 1. The viewing means for entubator 50, like the viewing means of the'bronchoscope shown in FIGS. l-4, is comprised of a coherent flexible fiber optic image transmitting bundle and a flexible light source illuminating bundle, both of which are enclosed in a plastic covering 52. The image transmitting bundle extends throughout the length of covering 52 to the distal end 54 of the entuba tor whereupon it is capped by an appropriate lens for viewing the anatomy of the nasopharynx. The proximal end of the image transmitting bundle extends through handle 56 and is optically connected to an eye piece 58 to enable the operator to view images focused by the lens on the distal end of the image transmitting bundle. The light source bundle also passes throughout the inside of the protective cover 52 to the distal end of the entubator. The light source bundle then passes through handle 56 of entubator 50 at 60 where it is protected by a plastic covering 62. The light source bundle within covering 62 is then connected to a fiber optic illuminator (not shown), thus enabling the illumination of the image to be viewed by the image transmitting bundle. Also extending through the-entire length of covering 52 is a conduit or channel 64. Channel 64 is open at the distal end 54 of the entubator and passes through handle 56 of the entubator and is connected to a connector 66 to which in turn is connected a suction line 68. For delivering local anaesthetic to the patient from the distal end of the entubator, suction line 68 is removed and a syringe is connected to connector 66. Delivery of the anaesthetic with this embodiment is identical to the delivery discussed above in connection with the embodiment shown in FIGS. 1-4. Running along the inside wall of covering 52 is a tension wire 70. Tension wire 70 is anchored to the covering 52 at the distal end of the entubator and runs along the inside wall of covering 52 into handle 56 whereupon it passes through the handle and is connected to a ring or trigger 72. Tension wire 70 may be constructed in the same manner as the tension wire used to remotely control the tip of cable 19 of bronchoscope 18 with the exception that tension wire 70 must be capable of exerting a force sufficient not only to remove the distal end 54 of the entubator but also be sufficient to move the endotracheal tubes through the distance required to accomplish the objects of this invention. It should, of course, be immediately appreciated that in an alternate embodiment of the invention a tension wire or any other means for moving the endotracheal tube may be built right into an endotracheal tube itself.

A transverse sectional view of entubator 50 is not shown in the drawing but it should be appreciated that such a view would be similar to the transverse sectional view of bronchoscope 18 shown in FIG. 2 of the draw- With the type of entubator shown in FIG. 5, the working length of the fiber optic bundles need not be as long as the working length of the bundles in cable 19 of bronchoscope 18. Preferably, the length of the en tubator should only be long enough so that when inserted in an endotracheal tube, handle 56 of the entubator is in close proximity to the proximal end 74 of metal connector 12 with distal end 54 extending just beyond distal end 16 of tube 10. The diameter of the assembly enclosed by covering 52 must be small enough so that the assembly can be positioned within the lumen of the endotracheal tube as is shown in FIG. 5. However, the fit must be loose enough to enable easy removal of the entubator from the tube after insertion of the tube into the patient without significantly disturbing the position of the tube in the patients trachea.

The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

I claim:-

I. An entubator for entubing an endotracheal tube in a patient's trachea through the patients nasopharynx comprising a viewing means for enabling the operator to view the passageway of the nasopharynx as the endotracheal tube advances therethrough, said viewing means being capable of being positioned within the lumen of the endotracheal tube and transmitting to the operator a view of the passageway formed by the nasopharynx when the endotracheal tube with said viewing means so positioned is in the nasopharynx and a directing means for directing a force applied at a point remote from the distal end of the endotracheal tube to remove the distal end of the endotracheal tube sufficiently to enable the operator to point the distal cndof the endotracheal tube into the nasopharynx as the endotracheal tube advances thercthrough, both said viewing means and said directing means being capable of being combined with an endotracheal tube and bending sufficiently to conform to the passageway formed by the nasopharynx so that the operator can navigate the endotracheal tube through the nasopharynx by moving the distal end of the endotracheal tube so that it points into the nasopharynx as the passageway of the nasopharynx is viewed by the operator during entubmcnt.

2. The entubator as set forth in claim 1 wherein said viewing means is a flexible coherent fiber optic bundle.

3. The entubator as set forth in claim 2 also comprising a channel which is capable of being positioned within the lumen of the endotracheal tube along with said bundle for delivering a local anaesthetic to the patient during the entubment procedure.

4. The entubator as set forth in claim 3 wherein said bundle and said channel is enclosed in a flexible covering and wherein said directing means is a tension wire anchored to said covering, said tension wire being capable of moving the entubator with sufficient force to cause the distal end of the endotracheal tube to point into the nasopharynx as the endotracheal tube advances therethrough when said entubator is positioned in said endotracheal tube and when a force is applied and directed along said tension wire.

5. The entubator as set forth in claim 2 wherein said directing means is attached to the endotracheal tube.

6. The entubator as set forth in claim 2 wherein said directing means is contained in the entubator.

7. An endotracheal tube which can be cntubed in a patients trachea through the patients nasopharynx, said tube containing a flexible coherent fiber optic bundle positioned within the lumen of the endotracheal tube for transmitting to the operator a view of the passageway formed by the nasopharynx as the endotracheal tube' advances therethrough, a directing means for directing a force applied at a point remote from the distal end of the-endotracheal tube to move the distal end of theendotracheal tube sufficiently to enable the operator to point the distal end of the endotracheal tube into the nasopharynx as the endotracheal tube advances therethrough, both said fiber optic bundle and said directing means being capable of bending sufficiently to conform to the passageway formed by the nasopharynx and a channel positioned within the lumen of the endotracheal tube for delivering a local anaesthetic to the patient during the entubment procedure.

8. In a method of entubing an end tracheal tube into a patients trachea through the patients nasopharynx in which a flexible coherent fiber optic bundle is used to view the passageway formed by the nasopharynx during the entubment procedure wherein the improvement comprises utilizing a mechanical means to direct a force applied at a point remote from the distal end of'the endotube with an anaesthetic jelly, anaesthetizing the patients nose and throat and anaesthetizing the patients vocal cords with a local anaesthetic after the cndotracheal tube has been navigated through the nasopharynx.

10. The method as set forth in claim 9 including the step of passing the cndotracheal tube through the patient's vocal cords while the vocal cords are viewed through the fiber optic bundle and after the local anaesthetic has taken effect.

UNITED STATES PATENT OFFICE CERTIFICATE 0F CORRECTION Patent No. 3,776,222 Dated December 4, 1973 Inv fit Joseph F. Smiddy It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Under listed assignee "Anthony M. Lurosso" should read -Anthony M. Lorusso- Column 12, line 9 "remove" should read -move- Column 12, line 60 "end tracheal" should read --endotracheal--.

Signed and sealed this 23rd day of April 197M (SEAL) Attest:

LD.-IAT-LD l-l.FLLITCI'IZSI-L,JR; '41. IL'lllSHAL-L DAMN Attosting officer Sormnissioner of Patents FcQM Po-1050 (10-69) USCOMM-DC 60376-F'69 I f U.S. GOVERNMENT PRINTING OFFICE: i969 0-366-33,

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,776,222 Dated December 1973 Inventor-( .JOSGPh. F- Smiddy It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Under listed assignee "Anthony M. Lurosso" should read --Anthony M. Lorusso-- Column 12, line 9 "remove" should read move-e. Column 12, line 60 "end tracheal" should read -+endotracheal.

Signed and sealed this 23rd day of April 19714..

(SEAL) Attest:

G. P'L'LRSHALL DAHN A ttosting Officer Commissioner of Patents F ORM PO-105O (10-69) USCOiMM-DC 60876-P69 u.s. GOVERNMENT PRINTING OFFICE I9" 0-366-334,

Claims (10)

1. An entubator for entubing an endotracheal tube in a patient''s trachea through the patient''s nasopharynx comprising a viewing means for enabling the operator to view the passageway of the nasopharynx as the endotracheal tube advances therethrough, said viewing means being capable of being positioned within the lumen of the endotracheal tube and transmitting to the operator a view of the passageway formed by the nasopharynx when the endotracheal tube with said viewing means so positioned is in the nasopharynx and a directing means for directing a force applied at a point remote from the distal end of the endotracheal tube to remove the distal end of the endotracheal tube sufficiently to enable the operator to point the distal end of the endotracheal tube into the nasopharynx as the endotracheal tube advances therethrough, both said viewing means and said directing means being capable of being combined with an endotracheal tube and bending sufficiently to conform to the passageway formed by the nasopharynx so that the operator can navigate the endotracheal tube through the nasopharynx by moving the distal end of the endotracheal tube so that it points into the nasopharynx as the passageway of the nasopharynx is viewed by the operator during entubment.
2. The entubator as set forth in claim 1 wherein said viewing means is a flexible coherent fiber optic bundle.
3. The entubator as set forth in claim 2 also comprising a channel which is capable of being positioned within the lumen of the endotracheal tube along with said bundle for delivering a local anaesthetic to the patient during the entubment procedure.
4. The entubator as set forth in claim 3 wherein said bundle and said channel is enclosed in a flexible covering and wherein said directing means is a tension wire anchored to said covering, said tension wire being capable of moving the entubator with sufficient force to cause the distal end of the endotracheal tube to point into the nasopharynx as the endotracheal tube advances therethrough when said entubator is positioned in said endotracheal tube and when a force is applied and directed along said tension wire.
5. The entubator as set forth in claim 2 wherein said directing means is attached to the endotracheal tube.
6. The entubator as set forth in claim 2 wherein said directing means is contained in the entubator.
7. An endotracheal tube which can be entubed in a patient''s trachea through the patient''s nasopharynx, said tube containing a flexible coherent fiber optic bundle positioned within the lumen of the endotracheal tube for transmitting to the operator a view of the passageway formed by the nasopharynx as the endotracheal tube advances therethrough, a directing means for directing a force applied at a point remote from the distal end of the endotracheal tube to move the distal end of the endotracheal tube sufficiently to enable the operator to point the distal end of the endotracheal tube into the nasopharynx as the endotracheal tube advances therethrough, both said fiber optic bundle and said directing means being capable of bending sufficiently to conform to the passageway formed by the nasopharynx and a channel positioned within the lumen of the endotracheal tube for delivering a local anaesthetic to the patient during the entubment procedure.
8. In a method of entubing an end tracheal tube into a patient''s trachea through the patient''s nasopharynx in which a flexible coherent fiber optic bundle is used to view the passageway formed by the nasopharynx during the entubment procedure wherein the improvement comprises utilizing a mechanical means to direct a force applied at a point remote from the distal end of the endotracheal tube to move the distal end of the endotracheal tube, and navigating the endotracheal tube through the nasopharynx by moving the distal end of the endotracheal tube by applying a force with said mechanical means so that the distal end of the endotracheal tube points in the general direction of the passageway formed by the nasopharynx as the endotracheal tube advances through said passageway toward the patient''s trachea.
9. The method as set forth in claim 8 including the steps of lubricating the distal end of the endotracheal tube with an anaesthetic jelly, anaesthetizing the patient''s nose and throat and anaesthetizing the patient''s vocal cords with a local anaesthetic after the endotracheal tube has been navigated through the nasopharynx.
10. The method as set forth in claim 9 including the step of passing the endotracheal tube through the patient''s vocal cords while the vocal cords are viewed through the fiber optic bundle and after the local anaesthetic has taken effect.
US3776222D 1971-12-23 1971-12-23 Fiber optic entubator and method of entubation of the trachea through the nasopharynx Expired - Lifetime US3776222A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US21138871A true 1971-12-23 1971-12-23

Publications (1)

Publication Number Publication Date
US3776222A true US3776222A (en) 1973-12-04

Family

ID=22786734

Family Applications (1)

Application Number Title Priority Date Filing Date
US3776222D Expired - Lifetime US3776222A (en) 1971-12-23 1971-12-23 Fiber optic entubator and method of entubation of the trachea through the nasopharynx

Country Status (1)

Country Link
US (1) US3776222A (en)

Cited By (86)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3920980A (en) * 1974-07-18 1975-11-18 Nath Guenther Flexible light guide
US4086919A (en) * 1976-07-09 1978-05-02 Bullard James R Laryngoscope
US4150676A (en) * 1975-07-01 1979-04-24 National Catheter Corp. Endotracheal tubes with intubation direction control means
US4361139A (en) * 1979-11-20 1982-11-30 Olympus Optical Company Ltd. Scirroscope
EP0131659A1 (en) * 1983-07-08 1985-01-23 Vanderbilt University Medical tube and method of use thereof
US4580556A (en) * 1984-04-13 1986-04-08 Kondur Prabhakar R Adaptor for endotracheal intubation
US4589410A (en) * 1985-07-15 1986-05-20 Miller Larry S Endotracheal tube
US4593682A (en) * 1983-09-28 1986-06-10 Richard Wolf Gmbh Endoscope
US4685457A (en) * 1986-08-29 1987-08-11 Donenfeld Roger F Endotracheal tube and method of intubation
US4723936A (en) * 1986-07-22 1988-02-09 Versaflex Delivery Systems Inc. Steerable catheter
US4742819A (en) * 1987-03-23 1988-05-10 George Gordon P Intubating scope with camera and screen
US4787894A (en) * 1987-10-26 1988-11-29 Turnbull Christopher J Meconium aspiration device
US4826280A (en) * 1983-06-09 1989-05-02 Sumitomo Electric Industries, Ltd. Grooved optical transmission channel
US4859026A (en) * 1984-03-02 1989-08-22 The United States Of America As Represented By The Secretary Of The Army Optical assembly for aircraft trailing ground lines
US4905669A (en) * 1987-09-28 1990-03-06 James R. Bullard Laryngoscope
US4944740A (en) * 1984-09-18 1990-07-31 Medtronic Versaflex, Inc. Outer exchange catheter system
US4947829A (en) * 1988-05-10 1990-08-14 Bullard James R Modular blade laryngoscope
US5003963A (en) * 1987-09-28 1991-04-02 James Roger Bullard Laryngoscope
US5016614A (en) * 1985-11-07 1991-05-21 Macallister Niall P Endotracheal intubation apparatus
US5095888A (en) * 1990-07-09 1992-03-17 Circon Corporation Intubating stylet for a laryngoscope
US5125895A (en) * 1986-07-22 1992-06-30 Medtronic Versaflex, Inc. Steerable catheter
US5131380A (en) * 1991-06-13 1992-07-21 Heller Richard M Softwall medical tube with fiberoptic light conductor therein and method of use
US5259377A (en) * 1992-03-30 1993-11-09 Stephen M. Daugherty Endotracheal tube stylet
US5285778A (en) * 1991-04-19 1994-02-15 Mackin Robert A Endotracheal tube wih fibers optic illumination and viewing and auxiliary tube
US5327881A (en) * 1993-02-26 1994-07-12 Beth Israel Hospital Association Fiberoptic intubating stylet
US5329940A (en) * 1990-02-14 1994-07-19 Adair Edwin Lloyd Endotracheal tube intubation assist device
US5337735A (en) * 1992-12-28 1994-08-16 Albert Salerno Fiber-lighted stylet
US5385138A (en) * 1992-01-21 1995-01-31 Berry; Yale Stereo endoscope for inserting into body cavities
US5580147A (en) * 1994-08-08 1996-12-03 Salerno; Albert Fiber-lighted stylet
US5643221A (en) * 1990-05-04 1997-07-01 Bullard; James Roger Controlled targeting laryngoscope
USRE35595E (en) * 1989-05-09 1997-08-26 Six; Gary Flexible tip stylet for use with an endotracheal intubation device
US5733242A (en) * 1996-02-07 1998-03-31 Rayburn; Robert L. Intubation system having an axially moveable memory cylinder
WO1998014112A2 (en) 1996-10-04 1998-04-09 University Of Florida Plastic optical fiber airway imaging system
US5791338A (en) * 1994-01-26 1998-08-11 William T. Merchant Endotracheal intubation apparatus
US5800342A (en) * 1994-03-18 1998-09-01 Lee; Jai S. Method of endotracheal intubation
US5842973A (en) * 1994-05-17 1998-12-01 Bullard; James Roger Nasal intubation apparatus
WO1999022636A1 (en) 1997-10-31 1999-05-14 Imagyn Medical Technologies, Inc. Intubation device and method
US5921917A (en) * 1997-10-20 1999-07-13 Clarus Medical Systems, Inc. Hand-held viewing system with removable sheath
WO1999035960A1 (en) 1998-01-16 1999-07-22 University Of Florida Malleable endotracheal tube with fiberoptic scope
WO1999038432A1 (en) * 1998-01-29 1999-08-05 Johns Hopkins University Copa method for fiberoptic endotracheal intubation
US5941816A (en) * 1997-04-15 1999-08-24 Clarus Medical Systems, Inc. Viewing system with adapter handle for medical breathing tubes
US5976075A (en) * 1997-12-15 1999-11-02 University Of Massachusetts Endoscope deployment apparatus
US6126649A (en) * 1999-06-10 2000-10-03 Transvascular, Inc. Steerable catheter with external guidewire as catheter tip deflector
WO2001002042A1 (en) 1999-07-02 2001-01-11 Pulmonx Methods, systems, and kits for lung volume reduction
US20030051733A1 (en) * 2001-09-10 2003-03-20 Pulmonx Method and apparatus for endobronchial diagnosis
WO2003101517A1 (en) * 2002-06-01 2003-12-11 Universitätsklinikum Hamburg-Eppendorf Körperschaft des Öffentlichen Rechts Supporting device for an intubation
WO2004008951A1 (en) 2002-07-24 2004-01-29 Intubation Plus, Inc. Laryngoscope with multi-directional eyepiece
US20040073191A1 (en) * 2000-10-27 2004-04-15 Pulmonx Methods and devices for obstructing and aspirating lung tissue segments
US6793661B2 (en) 2000-10-30 2004-09-21 Vision Sciences, Inc. Endoscopic sheath assemblies having longitudinal expansion inhibiting mechanisms
US20040220451A1 (en) * 1996-10-04 2004-11-04 Dietrich Gravenstein Imaging scope
US20050182297A1 (en) * 1996-10-04 2005-08-18 Dietrich Gravenstein Imaging scope
US20060025650A1 (en) * 2002-10-03 2006-02-02 Oren Gavriely Tube for inspecting internal organs of a body
WO2006055692A2 (en) 2004-11-16 2006-05-26 Pulmonx Pulmonary occlusal stent delivery catheter, loading system and methods of use
WO2006055683A2 (en) 2004-11-16 2006-05-26 Pulmonx Occlusal stent and methods for its use
US20070049803A1 (en) * 2004-04-27 2007-03-01 Hiroki Moriyama Endoscope and endoscope system
US20070142742A1 (en) * 2005-07-13 2007-06-21 Pulmonx Methods and systems for segmental lung diagnostics
US20070175482A1 (en) * 2006-01-27 2007-08-02 Ezc Medical Llc Apparatus for introducing an airway tube into the trachea having visualization capability and methods of use
US20080216840A1 (en) * 2007-03-06 2008-09-11 Searete Llc, A Limited Liability Corporation Of The State Of Delaware Imaging via the airway
US20080221582A1 (en) * 2007-03-05 2008-09-11 Pulmonx Pulmonary stent removal device
US20080221703A1 (en) * 2007-03-09 2008-09-11 Pulmonx Loading a device for a pulmonary implant
US20080216826A1 (en) * 2007-08-07 2008-09-11 Searete Llc, A Limited Liability Corporation Of The State Of Delaware Airway imaging system
US20090024018A1 (en) * 2007-08-07 2009-01-22 Searete Llc, A Limited Liability Corporation Of The State Of Delaware Anatomical imaging system
US20090209826A1 (en) * 2008-01-09 2009-08-20 Ezc Medical Llc Intubation systems and methods
US20100036361A1 (en) * 2008-06-20 2010-02-11 Pulmonx System and method for delivering multiple implants into lung passageways
US20100108060A1 (en) * 2006-06-01 2010-05-06 Truphatek International Ltd Hand operated articulated intubation stylet
US7883471B2 (en) 2001-09-10 2011-02-08 Pulmonx Corporation Minimally invasive determination of collateral ventilation in lungs
US7946981B1 (en) 2003-10-23 2011-05-24 Anthony Cubb Two-piece video laryngoscope
US20120016197A1 (en) * 2009-05-28 2012-01-19 Smiths Medical International Limited Medico-surgical apparatus
US8157919B2 (en) 2009-02-06 2012-04-17 Endoclear, Llc Methods for removing debris from medical tubes
US8382908B2 (en) 2009-02-06 2013-02-26 Endoclear, Llc Methods for cleaning endotracheal tubes
US8496006B2 (en) 2005-01-20 2013-07-30 Pulmonx Corporation Methods and devices for passive residual lung volume reduction and functional lung volume expansion
US8523782B2 (en) 2005-12-07 2013-09-03 Pulmonx Corporation Minimally invasive determination of collateral ventilation in lungs
US20130338521A1 (en) * 2012-06-18 2013-12-19 Matthew Thompson Nasal tube device and method
US20140275772A1 (en) * 2007-03-29 2014-09-18 Robert Michael Chuda Intubation device with video and anatomic stylet steering
US8845518B2 (en) 2000-10-30 2014-09-30 Vision Sciences, Inc. Inflatable member for an endoscope sheath
US8876791B2 (en) 2005-02-25 2014-11-04 Pulmonx Corporation Collateral pathway treatment using agent entrained by aspiration flow current
US9050094B2 (en) 2007-03-12 2015-06-09 Pulmonx Corporation Methods and devices for passive residual lung volume reduction and functional lung volume expansion
US20150216607A1 (en) * 2010-04-08 2015-08-06 Eric James Kezirian Endoscopic device and system
US9445714B2 (en) 2010-03-29 2016-09-20 Endoclear Llc Endotracheal tube coupling adapters
US20170020383A1 (en) * 2010-06-04 2017-01-26 The Usa, As Represented By The Secretary, Department Of Health And Human Services Nasal aerosol delivery system
US9789272B2 (en) 2012-08-10 2017-10-17 Applied Medical Technology, Inc. Bridle device and method
US9814380B1 (en) 2013-03-02 2017-11-14 Octavio Cesar Silva Pedicle endoscope
US10004863B2 (en) 2012-12-04 2018-06-26 Endoclear Llc Closed suction cleaning devices, systems and methods
US10016575B2 (en) 2014-06-03 2018-07-10 Endoclear Llc Cleaning devices, systems and methods
US10149602B2 (en) 2011-07-11 2018-12-11 Ambu A/S Endobronchial tube with integrated image sensor and a cleaning nozzle arrangement
US10245402B2 (en) 2011-07-11 2019-04-02 Ambu A/S Endobronchial tube with integrated image sensor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3610231A (en) * 1967-07-21 1971-10-05 Olympus Optical Co Endoscope
US3669098A (en) * 1968-10-05 1972-06-13 Olympus Optical Co Endotracheal tube
US3677262A (en) * 1970-07-23 1972-07-18 Henry J Zukowski Surgical instrument illuminating endotracheal tube inserter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3610231A (en) * 1967-07-21 1971-10-05 Olympus Optical Co Endoscope
US3669098A (en) * 1968-10-05 1972-06-13 Olympus Optical Co Endotracheal tube
US3677262A (en) * 1970-07-23 1972-07-18 Henry J Zukowski Surgical instrument illuminating endotracheal tube inserter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
P. Murphy Anaesthesia Vol. 22, No. 3 July 1967 pp. 489 491 *

Cited By (135)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3920980A (en) * 1974-07-18 1975-11-18 Nath Guenther Flexible light guide
US4150676A (en) * 1975-07-01 1979-04-24 National Catheter Corp. Endotracheal tubes with intubation direction control means
US4086919A (en) * 1976-07-09 1978-05-02 Bullard James R Laryngoscope
US4361139A (en) * 1979-11-20 1982-11-30 Olympus Optical Company Ltd. Scirroscope
US4826280A (en) * 1983-06-09 1989-05-02 Sumitomo Electric Industries, Ltd. Grooved optical transmission channel
EP0131659A1 (en) * 1983-07-08 1985-01-23 Vanderbilt University Medical tube and method of use thereof
US4593682A (en) * 1983-09-28 1986-06-10 Richard Wolf Gmbh Endoscope
US4859026A (en) * 1984-03-02 1989-08-22 The United States Of America As Represented By The Secretary Of The Army Optical assembly for aircraft trailing ground lines
US4580556A (en) * 1984-04-13 1986-04-08 Kondur Prabhakar R Adaptor for endotracheal intubation
US4944740A (en) * 1984-09-18 1990-07-31 Medtronic Versaflex, Inc. Outer exchange catheter system
US4589410A (en) * 1985-07-15 1986-05-20 Miller Larry S Endotracheal tube
US5016614A (en) * 1985-11-07 1991-05-21 Macallister Niall P Endotracheal intubation apparatus
US4723936A (en) * 1986-07-22 1988-02-09 Versaflex Delivery Systems Inc. Steerable catheter
US5125895A (en) * 1986-07-22 1992-06-30 Medtronic Versaflex, Inc. Steerable catheter
US4685457A (en) * 1986-08-29 1987-08-11 Donenfeld Roger F Endotracheal tube and method of intubation
US4742819A (en) * 1987-03-23 1988-05-10 George Gordon P Intubating scope with camera and screen
US4905669A (en) * 1987-09-28 1990-03-06 James R. Bullard Laryngoscope
US5003963A (en) * 1987-09-28 1991-04-02 James Roger Bullard Laryngoscope
US4787894A (en) * 1987-10-26 1988-11-29 Turnbull Christopher J Meconium aspiration device
US4947829A (en) * 1988-05-10 1990-08-14 Bullard James R Modular blade laryngoscope
USRE35595E (en) * 1989-05-09 1997-08-26 Six; Gary Flexible tip stylet for use with an endotracheal intubation device
US5329940A (en) * 1990-02-14 1994-07-19 Adair Edwin Lloyd Endotracheal tube intubation assist device
US5643221A (en) * 1990-05-04 1997-07-01 Bullard; James Roger Controlled targeting laryngoscope
US5095888A (en) * 1990-07-09 1992-03-17 Circon Corporation Intubating stylet for a laryngoscope
US5285778A (en) * 1991-04-19 1994-02-15 Mackin Robert A Endotracheal tube wih fibers optic illumination and viewing and auxiliary tube
US5131380A (en) * 1991-06-13 1992-07-21 Heller Richard M Softwall medical tube with fiberoptic light conductor therein and method of use
US5385138A (en) * 1992-01-21 1995-01-31 Berry; Yale Stereo endoscope for inserting into body cavities
US5259377A (en) * 1992-03-30 1993-11-09 Stephen M. Daugherty Endotracheal tube stylet
US5337735A (en) * 1992-12-28 1994-08-16 Albert Salerno Fiber-lighted stylet
US5327881A (en) * 1993-02-26 1994-07-12 Beth Israel Hospital Association Fiberoptic intubating stylet
US5791338A (en) * 1994-01-26 1998-08-11 William T. Merchant Endotracheal intubation apparatus
US5840013A (en) * 1994-03-18 1998-11-24 Lee; Jai S. Method of introducing a tubular member at a site in the body
US5800342A (en) * 1994-03-18 1998-09-01 Lee; Jai S. Method of endotracheal intubation
US5842973A (en) * 1994-05-17 1998-12-01 Bullard; James Roger Nasal intubation apparatus
US5580147A (en) * 1994-08-08 1996-12-03 Salerno; Albert Fiber-lighted stylet
US5733242A (en) * 1996-02-07 1998-03-31 Rayburn; Robert L. Intubation system having an axially moveable memory cylinder
WO1998014112A2 (en) 1996-10-04 1998-04-09 University Of Florida Plastic optical fiber airway imaging system
US6115523A (en) * 1996-10-04 2000-09-05 University Of Florida Plastic optical fiber airway imaging system
EP1281348A2 (en) 1996-10-04 2003-02-05 University Of Florida Plastic optical fiber airway imaging system
US6322498B1 (en) * 1996-10-04 2001-11-27 University Of Florida Imaging scope
US20050182297A1 (en) * 1996-10-04 2005-08-18 Dietrich Gravenstein Imaging scope
EP1262141A1 (en) 1996-10-04 2002-12-04 University Of Florida Plastic optical fiber airway imaging system
US20040220451A1 (en) * 1996-10-04 2004-11-04 Dietrich Gravenstein Imaging scope
US5941816A (en) * 1997-04-15 1999-08-24 Clarus Medical Systems, Inc. Viewing system with adapter handle for medical breathing tubes
US5921917A (en) * 1997-10-20 1999-07-13 Clarus Medical Systems, Inc. Hand-held viewing system with removable sheath
US5913816A (en) * 1997-10-31 1999-06-22 Imagyn Medical Technologies, Inc. Intubation device and method
WO1999022636A1 (en) 1997-10-31 1999-05-14 Imagyn Medical Technologies, Inc. Intubation device and method
US5976075A (en) * 1997-12-15 1999-11-02 University Of Massachusetts Endoscope deployment apparatus
WO1999035960A1 (en) 1998-01-16 1999-07-22 University Of Florida Malleable endotracheal tube with fiberoptic scope
US5976072A (en) * 1998-01-29 1999-11-02 Johns Hopkins University Copa method for fiberoptic endotracheal intubation
WO1999038432A1 (en) * 1998-01-29 1999-08-05 Johns Hopkins University Copa method for fiberoptic endotracheal intubation
US6126649A (en) * 1999-06-10 2000-10-03 Transvascular, Inc. Steerable catheter with external guidewire as catheter tip deflector
US7141046B2 (en) 1999-07-02 2006-11-28 Pulmonx Methods, systems, and kits for lung volume reduction
US20100280538A1 (en) * 1999-07-02 2010-11-04 Pulmonx Corporation Methods, systems, and kits for lung volume reduction
US7458963B2 (en) 1999-07-02 2008-12-02 Pulmonx Methods, systems, and kits for lung volume reduction
US8177769B2 (en) 1999-07-02 2012-05-15 Pulmonx Corporation Methods, systems, and kits for lung volume reduction
US6709401B2 (en) 1999-07-02 2004-03-23 Pulmonx Methods, systems, and kits for lung volume reduction
US6287290B1 (en) 1999-07-02 2001-09-11 Pulmonx Methods, systems, and kits for lung volume reduction
US20040158228A1 (en) * 1999-07-02 2004-08-12 Pulmonx Methods, systems, and kits for lung volume reduction
US7766895B2 (en) 1999-07-02 2010-08-03 Pulmonx Corporation Methods, systems, and kits for lung volume reduction
US20020062120A1 (en) * 1999-07-02 2002-05-23 Pulmonx Methods, systems, and kits for lung volume reduction
US20050015106A1 (en) * 1999-07-02 2005-01-20 Pulmonx Methods, systems, and kits for lung volume reduction
US6878141B1 (en) 1999-07-02 2005-04-12 Pulmonx Methods systems and kits for lung volume reduction
WO2001002042A1 (en) 1999-07-02 2001-01-11 Pulmonx Methods, systems, and kits for lung volume reduction
US20050203483A1 (en) * 1999-07-02 2005-09-15 Pulmonx Methods, systems, and kits for lung volume reduction
US7186259B2 (en) 1999-07-02 2007-03-06 Pulmonx Methods, systems, and kits for lung volume reduction
US6997918B2 (en) 2000-10-27 2006-02-14 Pulmonx Methods and devices for obstructing and aspirating lung tissue segments
US20040073191A1 (en) * 2000-10-27 2004-04-15 Pulmonx Methods and devices for obstructing and aspirating lung tissue segments
US6793661B2 (en) 2000-10-30 2004-09-21 Vision Sciences, Inc. Endoscopic sheath assemblies having longitudinal expansion inhibiting mechanisms
US8845518B2 (en) 2000-10-30 2014-09-30 Vision Sciences, Inc. Inflatable member for an endoscope sheath
US8454527B2 (en) 2001-09-10 2013-06-04 Pulmonx Corporation Minimally invasive determination of collateral ventilation in lungs
US20080200797A1 (en) * 2001-09-10 2008-08-21 Pulmonx Method and apparatus for endobronchial diagnosis
US20030051733A1 (en) * 2001-09-10 2003-03-20 Pulmonx Method and apparatus for endobronchial diagnosis
US7883471B2 (en) 2001-09-10 2011-02-08 Pulmonx Corporation Minimally invasive determination of collateral ventilation in lungs
WO2003101517A1 (en) * 2002-06-01 2003-12-11 Universitätsklinikum Hamburg-Eppendorf Körperschaft des Öffentlichen Rechts Supporting device for an intubation
WO2004008951A1 (en) 2002-07-24 2004-01-29 Intubation Plus, Inc. Laryngoscope with multi-directional eyepiece
US20060025650A1 (en) * 2002-10-03 2006-02-02 Oren Gavriely Tube for inspecting internal organs of a body
US7946981B1 (en) 2003-10-23 2011-05-24 Anthony Cubb Two-piece video laryngoscope
US8137264B2 (en) * 2004-04-27 2012-03-20 Olympus Corporation Endoscope system having two endoscopes with different viewing angles
US20070049803A1 (en) * 2004-04-27 2007-03-01 Hiroki Moriyama Endoscope and endoscope system
US20060162731A1 (en) * 2004-11-16 2006-07-27 Pulmonx Pulmonary occlusal stent delivery catheter, loading system and methods of use
US8409168B2 (en) 2004-11-16 2013-04-02 Pulmonx Corporation Pulmonary occlusal stent delivery catheter, loading system and methods of use
US9131942B2 (en) 2004-11-16 2015-09-15 Pulmonx Corporation Pulmonary occlusal stent delivery catheter, loading system and methods of use
EP3295990A2 (en) 2004-11-16 2018-03-21 Pulmonx Pulmonary occlusal stent delivery catheter and loading system
WO2006055683A2 (en) 2004-11-16 2006-05-26 Pulmonx Occlusal stent and methods for its use
US20100175693A1 (en) * 2004-11-16 2010-07-15 Pulmonx Corporation Pulmonary occlusal stent delivery catheter, loading system and methods of use
WO2006055692A2 (en) 2004-11-16 2006-05-26 Pulmonx Pulmonary occlusal stent delivery catheter, loading system and methods of use
US9533116B2 (en) 2005-01-20 2017-01-03 Pulmonx Corporation Methods and devices for passive residual lung volume reduction and functional lung volume expansion
US8496006B2 (en) 2005-01-20 2013-07-30 Pulmonx Corporation Methods and devices for passive residual lung volume reduction and functional lung volume expansion
US8876791B2 (en) 2005-02-25 2014-11-04 Pulmonx Corporation Collateral pathway treatment using agent entrained by aspiration flow current
US20070142742A1 (en) * 2005-07-13 2007-06-21 Pulmonx Methods and systems for segmental lung diagnostics
US8523782B2 (en) 2005-12-07 2013-09-03 Pulmonx Corporation Minimally invasive determination of collateral ventilation in lungs
WO2007089491A3 (en) * 2006-01-27 2008-02-14 Ezc Medical Llc Apparatus for introducing an airway tube into the trachea having visualization capability and methods of use
US20070175482A1 (en) * 2006-01-27 2007-08-02 Ezc Medical Llc Apparatus for introducing an airway tube into the trachea having visualization capability and methods of use
WO2007089491A2 (en) * 2006-01-27 2007-08-09 Ezc Medical Llc Apparatus for introducing an airway tube into the trachea having visualization capability and methods of use
US20100108060A1 (en) * 2006-06-01 2010-05-06 Truphatek International Ltd Hand operated articulated intubation stylet
US8505531B2 (en) 2006-06-01 2013-08-13 Truphatek International Ltd. Hand operated articulated intubation stylet
US20080221582A1 (en) * 2007-03-05 2008-09-11 Pulmonx Pulmonary stent removal device
US20080216840A1 (en) * 2007-03-06 2008-09-11 Searete Llc, A Limited Liability Corporation Of The State Of Delaware Imaging via the airway
US20080221703A1 (en) * 2007-03-09 2008-09-11 Pulmonx Loading a device for a pulmonary implant
US8100959B2 (en) 2007-03-09 2012-01-24 Pulmonx Corporation Loading device for a pulmonary implant
US9050094B2 (en) 2007-03-12 2015-06-09 Pulmonx Corporation Methods and devices for passive residual lung volume reduction and functional lung volume expansion
US20140275772A1 (en) * 2007-03-29 2014-09-18 Robert Michael Chuda Intubation device with video and anatomic stylet steering
US20090024018A1 (en) * 2007-08-07 2009-01-22 Searete Llc, A Limited Liability Corporation Of The State Of Delaware Anatomical imaging system
US20080216826A1 (en) * 2007-08-07 2008-09-11 Searete Llc, A Limited Liability Corporation Of The State Of Delaware Airway imaging system
US20090209826A1 (en) * 2008-01-09 2009-08-20 Ezc Medical Llc Intubation systems and methods
US20100036361A1 (en) * 2008-06-20 2010-02-11 Pulmonx System and method for delivering multiple implants into lung passageways
US8534287B2 (en) 2009-02-06 2013-09-17 Endoclear, Llc Methods for tracheostomy visualization
US8601633B2 (en) 2009-02-06 2013-12-10 Endoclear Llc Cleaning of body-inserted medical tubes
US8157919B2 (en) 2009-02-06 2012-04-17 Endoclear, Llc Methods for removing debris from medical tubes
US9907624B2 (en) 2009-02-06 2018-03-06 Endoclear Llc Body-inserted tube cleaning with suction
US8382908B2 (en) 2009-02-06 2013-02-26 Endoclear, Llc Methods for cleaning endotracheal tubes
US9962233B2 (en) 2009-02-06 2018-05-08 Endoclear Llc Body-inserted tube cleaning
US9095286B2 (en) 2009-02-06 2015-08-04 Endoclear Llc Body-inserted tube cleaning
US9855111B2 (en) 2009-02-06 2018-01-02 Endoclear Llc Methods of removing biofilm from endotracheal tubes
US8458844B2 (en) 2009-02-06 2013-06-11 Endoclear, Llc Medical tube cleaning apparatus
US9332891B2 (en) 2009-02-06 2016-05-10 Endoclear Llc Tracheostomy visualization
US8381345B2 (en) 2009-02-06 2013-02-26 Endoclear, Llc Devices for cleaning endotracheal tubes
US9398837B2 (en) 2009-02-06 2016-07-26 Endoclear Llc Methods for confirming placement of endotracheal tubes
US9579012B2 (en) 2009-02-06 2017-02-28 Endoclear Llc Visualized endotracheal tube placement systems
US9386907B2 (en) 2009-02-06 2016-07-12 Endoclear Llc Visualization systems and methods
US8468637B2 (en) 2009-02-06 2013-06-25 Endoclear Llc Mechanically-actuated endotracheal tube cleaning device
US20120016197A1 (en) * 2009-05-28 2012-01-19 Smiths Medical International Limited Medico-surgical apparatus
US9801535B2 (en) * 2009-05-28 2017-10-31 Smiths Medical International Limited Medico-surgical apparatus
US9445714B2 (en) 2010-03-29 2016-09-20 Endoclear Llc Endotracheal tube coupling adapters
US10064683B2 (en) * 2010-04-08 2018-09-04 Eric James Kezirian Endoscopic device and system
US20150216607A1 (en) * 2010-04-08 2015-08-06 Eric James Kezirian Endoscopic device and system
US20170020383A1 (en) * 2010-06-04 2017-01-26 The Usa, As Represented By The Secretary, Department Of Health And Human Services Nasal aerosol delivery system
US10245402B2 (en) 2011-07-11 2019-04-02 Ambu A/S Endobronchial tube with integrated image sensor
US10149602B2 (en) 2011-07-11 2018-12-11 Ambu A/S Endobronchial tube with integrated image sensor and a cleaning nozzle arrangement
US20130338521A1 (en) * 2012-06-18 2013-12-19 Matthew Thompson Nasal tube device and method
US9789272B2 (en) 2012-08-10 2017-10-17 Applied Medical Technology, Inc. Bridle device and method
US10004863B2 (en) 2012-12-04 2018-06-26 Endoclear Llc Closed suction cleaning devices, systems and methods
US9814380B1 (en) 2013-03-02 2017-11-14 Octavio Cesar Silva Pedicle endoscope
US10016575B2 (en) 2014-06-03 2018-07-10 Endoclear Llc Cleaning devices, systems and methods

Similar Documents

Publication Publication Date Title
EP0658090B1 (en) Sterilizable endoscope with separable disposable tube assembly
US9179823B2 (en) Methods and devices for facilitating visualization in a surgical environment
KR100801765B1 (en) Intubation instrument
US5845634A (en) Endoscope viewing system with orotracheal introducing guide
US6004263A (en) Endoscope with detachable operation unit and insertion unit
KR101060944B1 (en) Tube to examine the internal organs of the body
US9265407B2 (en) Endoscopic methods and devices for transnasal procedures
US6991604B2 (en) Dual blade laryngoscope with esophageal obturator
US6568388B2 (en) Method and apparatus for ventilation / oxygenation during guided insertion of an endotracheal tube
JP3068652B2 (en) Laryngoscope
US5643175A (en) Sterilizable endoscope with separable disposable tube assembly
CA1165651A (en) Laryngoscope
US5827178A (en) Laryngoscope for use in trachea intubation
US5152278A (en) Surgical endoscope apparatus
US5951461A (en) Image-guided laryngoscope for tracheal intubation
CA2225669C (en) Intubation system having an axially moveable memory cylinder
US5846182A (en) Esophageal overtube for smoke evacuation
ES2479940T3 (en) Laryngoscope with ocular multidirectional
US5938591A (en) Self retaining laryngoscope
US6884220B2 (en) Optical transesophageal echocardiography probe
US6929600B2 (en) Apparatus for intubation
US5603688A (en) Laryngoscope including an upwardly curved blade having a downwardly directed tip portion
US5807239A (en) Transcervical ostium access device and method
US20090192350A1 (en) Wireless video stylet with display mounted to laryngoscope blade and method for using the same
US4567882A (en) Method for locating the illuminated tip of an endotracheal tube