WO2003045485A1 - Endotracheal tube with tip directional control and position preserving mechanism - Google Patents
Endotracheal tube with tip directional control and position preserving mechanism Download PDFInfo
- Publication number
- WO2003045485A1 WO2003045485A1 PCT/US2001/044296 US0144296W WO03045485A1 WO 2003045485 A1 WO2003045485 A1 WO 2003045485A1 US 0144296 W US0144296 W US 0144296W WO 03045485 A1 WO03045485 A1 WO 03045485A1
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- WO
- WIPO (PCT)
- Prior art keywords
- tube
- flexible
- proximal end
- pulling mechanism
- cuff
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/04—Tracheal tubes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/04—Tracheal tubes
- A61M16/0402—Special features for tracheal tubes not otherwise provided for
- A61M16/0418—Special features for tracheal tubes not otherwise provided for with integrated means for changing the degree of curvature, e.g. for easy intubation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/04—Tracheal tubes
- A61M16/0434—Cuffs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
- A61F2002/046—Tracheae
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M25/0133—Tip steering devices
- A61M25/0147—Tip steering devices with movable mechanical means, e.g. pull wires
Definitions
- This invention generally relates to endotracheal tubes, and more particularly, to endotracheal tubes having a bendable portion designed to facilitate intubation of difficult airways (tracheal inlet opening) caused by anatomical variation, trauma and the like.
- An endotracheal tube generally comprises a cylindrical tube used as an air passage to administer oxygen and anesthetic gases directly to the patient.
- the cylindrical tube terminates in an open distal end configured for insertion into the trachea and has an opposite open proximal end configured to be coupled to a gas source.
- the endotracheal tube typically has an inflatable cuff on the exterior of the cylindrical tube for forming a seal with the interior walls of the trachea. (See U.S. Patent No. 3,460,541 to Doherty).
- the cuff functions to occlude the trachea which protects the trachea and lungs against aspiration of foreign substances. In particular, food, foreign bodies or digestive system contents are prevented from entering the lungs.
- the endotracheal tube is used primarily in surgery, but is also frequently used in emergency rooms and emergency in-the-field situations.
- the patient In surgical procedures requiring general anesthesia, the patient is rendered unconscious by administration of anesthetic agents including drugs and/or gases. The patient is also given a muscle relaxant / paralyzing agent to minimize the patient's gagging response to the insertion ofthe endotracheal tube.
- a laryngoscope is placed in the mouth of the patient. The blade portion of the laryngoscope is used to push the tongue laterally and the intubating practitioner applies a lifting force to the laryngoscope handle in order to visualize the anatomical structures of the mouth and airway.
- a specific target area of the tracheal tube is the glottis, which is the opening between the vocal cords and the inlet to the trachea.
- the distal end of the endotracheal tube is inserted into the glottis and the inflatable cuff (balloon) is filled with air to create an airtight seal between the cuff walls and the interior walls of the trachea.
- This airtight seal allows for delivery of the oxygen and anesthetic gases with positive pressure directly to the air passages below the tip and the balloon.
- Patient anatomies differ greatly and fall into specific categories that are grouped according to potential difficulty of tube insertion.
- a patient with an anterior glottis or target orifice the vocal cords and opening positioned high in the patient's neck and to the front of the neck
- placing the insertion end of the endotracheal tube through the opening can be extremely difficult, and can lead to serious injury and even death from lack of oxygen.
- careful evaluation by the anesthesiologist or healthcare practitioner may suggest difficulty, the condition is usually undetectable until the orifice and vocal cords are visualized with a laryngoscope and blade apparatus.
- U. S. Patent No. 4,589,410 to Miller, U. S. Patent No. 4,150,676 to Jackson and U.S. Patent No. 4,685,457 to Donenfeld each show an endotracheal tube with at least one pull cord in the wall along a portion of the length of the tube. Applying tension on the cord causes the tube at a position proximal to the balloon to curl, apparently due to the compressibility of the material of construction. However, the tip of the tube does not bend, the bending being distributed along the whole length of the pull cord.
- These devices do not employ a hinge or spring- type mechanism or altered tube wall, nor do they use a locking device. As a result, these prior devices do not allow selected movement at the tip of the tube. In these prior devices, the body of the tube is moved by a pulley mechanism which bends a considerable portion of the tube, thus creating problems due movement of the tube within the mouth.
- U.S. Patent No. 5,255,668 to Umeda is directed to a bendable endoscope used for broncoscopy which includes a bendable distal portion spaced between two coils in the wall of the tube, the bendable portion is caused to bend by pulling on a wire in the wall of the tube.
- U.S. Patent No. 4, 911 ,148 to Sosnowski et al. is directed to small diameter (diameter of 0.15 mm or less) endoscopes which have a series of radial notches spaced along the length of the tube and a pull wire through the notched wall. Pulling on the wire causes the tube to bend along the portion containing the notches, which in turn causes the tip to deflect.
- U.S. Patent No. 5,304,131 to Paskar shows an arterial or venous catheter with an area of weakness along one side of the catheter.
- the weakness is the result of gaps cut through the wall of the catheter. Bending of the weakened portion is provided by a wire running through the wall on the side of the gaps.
- a jacket can cover the spring and the weakened portion.
- U.S. Patent No. 4,353,358 to Emerson is directed to a flexible sigmoidoscope which has notches and a pull wire similar to Sosnowski et al.
- Other flexible tipped endoscopes and catheters with hinged portions and a pull wire are also shown in U.S. Patent No. 5,772,578 to Heimberger, et al. and U.S. Patent No. 5,448,989 to Heckele.
- U.S. Patent No. 5,306,245 to Heaven shows a bendable tubular device which includes a cutaway wall opposite a flexible stainless steel hinge with a pull wire in the tube wall opposite to the hinge. At least the cut-out portion is covered by an outer plastic material.
- This plastic cover may also cover the pull wire, as well as the full length of the tube.
- a balloon may be added distal to the bendable portion. These devices do not include an occlusion balloon such as is required on an endotracheal tube. While Heaven includes a balloon, it is distal to the bendable portion and used for cholangiographic purposes and is not intended to seal a trachea.
- the endotracheal tube of the present invention has a distal end configured to be inserted into a human trachea that can be manipulated, without the use of a stylette or other guiding device, while the tip ofthe tube is approaching the glottis.
- the main tube body remains in its original configuration, while allowing the distal end to be independently curved or bent and maintained in a desired position during placement of the endotracheal tube.
- the lumen of the endotracheal tube remains unoccluded during the curving ofthe distal tip so as not to block the patient's airways.
- Creating the desired distal tip curvature is accomplished by the use of various designs, all contemplated as within the scope of the invention, in combination with one or more mechanisms for manipulating the distal end of the tube.
- these include:
- All of the above mechanisms may be applied to the outside of the endotracheal tube, incorporated in the wall of the tube, or inserted within the lumen of the tube.
- the endotracheal tube of the present invention also contemplates a control mechanism for causing movement of the tip and temporary locking of the bend which is imposed on the distal end tube. This can be accomplished by the use of a friction lock mechanism, a single axis lock, a sliding trigger with catch, a detent system, or a similar locking device which cooperates with a pull wire.
- This locked position permits the practitioner to have at least one hand free to manipulate other devices. In its preferred operation, one hand holds the endotracheal tube while the laryngoscope is operated with the other hand.
- An endotracheal tube incorporating features of the invention preferably does not have an occluded tube lumen, allows the practitioner to have superior tip control, and allows rapid achievement of airway control.
- FIGURE 1 is A PARTIAL CUTAWAY VIEW OF AN ENDOTRACHEAL TUBE
- FIGURE 1A is AN ENLARGED CUTAWAY VIEW OF THE BALLOON SHOWN IN FIGURE 1 ;
- FIGURE 2 IS A PARTIAL CUTAWAY VIEW OF THE ENDOTRACHEAL TUBE OF FIGURE 1 WITH THE TIP BENDING FUNCTION ACTIVATED;
- FIGURE 3 IS AN ENLARGED, PARTIAL CUTAWAY VIEW OF THE DISTAL PORTION OF THE ENDOTRACHEAL TUBE OF FIGURE 2 SHOWING THE BENT PORTION OF THE DEVICE;
- FIGURE 4 IS AN ENLARGED, PARTIAL CUTAWAY VIEW OF THE ENDOTRACHEAL TUBE OF FIGURE 2 SHOWING THE CONTROL PORTION OF THE DEVICE IN THE TIP RETRACTED POSITION;
- FIGURE 5 is AN END VIEWTAKEN ALONG LINE 5 - 5 OF FIGURE 4 SHOWING THE
- FIGURE 6 IS AN ENLARGED, PARTIAL CUTAWAY VIEW OF THE DISTAL PORTION OF A SECOND EMBODIMENT OF AN ENDOTRACHEAL TUBE INCORPORATING FEATURES OF THE INVENTION SHOWING THE BENDABLE PORTION OF THE DEVICE;
- FIGURE 7 IS AN ENLARGED, PARTIAL CUTAWAY VIEW OF THE DISTAL PORTION OF THE ENDOTRACHEAL TUBE OF FIGURE 6 SHOWING THE BENDABLE PORTION OF THE DEVICE IN ITS BENT CONFIGURATION;
- FIGURE 8 IS AN ENLARGED, PARTIAL CUTAWAY VIEW OF THE DISTAL PORTION OF A THIRD EMBODIMENT OF THE ENDOTRACHEAL TUBE INCORPORATING FEATURES OF THE INVENTION SHOWING THE BENDABLE PORTION OF THE DEVICE;
- FIGURE 9 IS AN ENLARGED, PARTIAL CUTAWAY VIEW OF THE DISTAL PORTION OF THE ENDOTRACHEAL TUBE OF FIGURE 8 SHOWING THE BENDABLE PORTION OF THE DEVICE IN ITS BENT CONFIGURATION;
- FIGURE 10 IS AN ENLARGED, PARTIAL CUTAWAY VIEW OF A FOURTH EMBODIMENT OF THE DISTAL PORTION OF THE ENDOTRACHEAL TUBE INCORPORATING FEATURES OF THE INVENTION SHOWING THE BENDABLE PORTION OF THE DEVICE;
- FIGURE 11 is A CROSS SECTIONAL VIEWTAKEN ALONG LINE 11 - 11 OF FIGURE 10;
- FIGURE 12 is A SIDE VIEW OF THE PROXIMAL END OF AN ENDOTRACHEAL TUBE
- FIGURE 13 IS A TOP VIEW OF THE PROXIMAL END OF THE ENDOTRACHEAL TUBE
- FIGURE 14 IS A SIDE VIEW OF THE PROXIMAL END OF AN ENDOTRACHEAL TUBE IN ACCORDANCE WITH A SIXTH EMBODIMENT OF THE INVENTION;
- FIGURE 15 is A TOP VIEW OF THE PROXIMAL END OF THE ENDOTRACHEAL TUBE SHOWN IN FIGURE 14;
- FIGURE 16 IS A SIDE VIEW OF AN ENDOTRACHEAL TUBE IN ACCORDANCE WITH A SEVENTH EMBODIMENT OF THE INVENTION;
- FIGURE 17 IS A CROSS SECTION VIEW OF THE ENDOTRACHEAL TUBE OF FIGURE 16 AS SEEN ALONG THE LINE 17-17;
- FIGURE 18 IS A SIDE OF VIEW OF A PORTION OF THE ENDOTRACHEAL TUBE OF FIGURE 16 SHOWING CERTAIN DETAILS THEREOF;
- FIGURES 19 AND 19A COMPRISE, RESPECTIVELY, A CROSS SECTION VIEW
- FIGURES 20 AND 20A COMPRISE, RESPECTIVELY, A CROSS SECTION VIEW
- FIGURES 21 AND 22 ARE SIDE VIEWS OF THE PROXIMAL END OF AN ENDOTRACHEAL TUBE IN ACCORDANCE WITH A TENTH EMBODIMENT, SHOWING THE PROXIMAL END IN ITS UNBENT AND BENT CONFIGURATIONS, RESPECTIVELY;
- FIGURES 23 AND 24 ARE SIDE VIEWS OF THE PROXIMAL END OF AN ENDOTRACHEAL TUBE IN ACCORDANCE WITH AN ELEVENTH EMBODIMENT OF THE INVENTION, SHOWING THE PROXIMAL END IN ITS UNBENT AND BENT CONFIGURATIONS, RESPECTIVELY;
- FIGURE 25 IS A PERSPECTIVE VIEW OF A PAIR OF FLEXIBLE MEMBRANES USED IN THE EMBODIMENT OF FIGURES 23 AND 24;
- FIGURE 26 is A PERSPECTIVE VIEW OF THE PAIR OF MEMBRANES OF FIGURE 25 SHOWN IN THEIR NESTED OR ASSEMBLED CONFIGURATION;
- FIGURES 27 AND 28 ARE ENLARGED SIDE VIEWS OF THE PROXIMAL END OF
- FIGURES 29 AND 30 ARE SIDE VIEWS OF THE PROXIMAL END OF AN ENDOTRACHEAL TUBE IN ACCORDANCE WITH A TWELFTH EMBODIMENT OF THE INVENTION, SHOWING THE PROXIMAL END IN ITS UNBENT AND BENT CONFIGURATIONS, RESPECTIVELY;
- FIGURE 31A IS A SIDE ELEVATIONAL VIEW OF AN ENDOTRACHEAL TUBE WITH
- FIGURE 31 B IS A VERTICAL CROSS-SECTIONAL VIEW OF THE ENDOTRACHEAL TUBE TAKEN ALONG THE LINE 31 B-31 B OF FIG. 31 A;
- FIGURE 32 is A SIDE ELEVATIONAL VIEW OF THE ENDOTRACHEAL TUBE OF FIG.
- FIGURE 33 is A SIDE ELEVATIONAL VIEW SHOWING AN EMBODIMENT OF THE
- FIGURE 34 IS A SIDE ELEVATIONAL VIEW OF AN ENDOTRACHEAL TUBE HAVING A
- Tracheal tube 10 has a hollow tubular body 12 with an inflatable balloon 14, also referred to as a cuff, mounted on the external surface of tubular body 12 near the distal end 16 thereof.
- an inflatable balloon 14 also referred to as a cuff
- Conduit 18 is used to inflate balloon 14 to a desired occluding diameter once tubular body 12 is placed in its desired location in the air passage of a patient.
- Conduit 18 is typically a small diameter tube 22 which runs through a passageway 24 within wall 26 of tubular body 12, or along the inner or outer surface of wall 26.
- passageway 24 in wall 26 can constitute conduit 18 with the small diameter tubular body 12 sealed into the proximal end of passageway 24.
- a valve 28 On the proximal end of the small diameter tube 22 is a valve 28, which acts to retain the inflation air in balloon 14 and, typically, a pilot balloon 30 which inflates when cuff 14 meets resistance from the trachea to further inflation. While the drawings show a cuff 14 with a diameter greater than the outer diameter of tubular body 12, the Figures all show cuff 14 and pilot balloon 30 in a deflated configuration, the cuff and balloon being further enlarged when inflated.
- proximal end 20 of tubular body 12 is an adapter 32 for connecting tracheal tube 10 to a source of air, oxygen, or gaseous anesthetic mixture, such as a respirator or wall mounted air supply (not shown).
- Distal end 16 of tubular body 12 is open to allow gas fed into the tube to flow without obstruction into the patient's air ways.
- distal end 16 shows an alternative tip design comprising two side openings and a protected tip end so that a smooth leading surface is presented to the tissue of the air passage to minimize trauma to the tissue during placement of the tracheal tube 10.
- Tracheal tube 10 includes a flexible portion 34 in the wall of tubular body 12 covered by cuff 14, a cable 36 extending from proximal end 20 to distal end 16 of tubular body 12, and a control mechanism 38 attached to proximal end of the cable 36.
- flexible portion 34 is created by removing some or all of wall 26 in the area under cuff 14. If a portion of the wall is retained, retained portion 40 is along the side of tubular body 12 opposite where cable 36 is located as shown in the embodiment of Figures 6 - 7. Retained portion 40 bends acting as a hinge.
- a coil spring 42 is located within flexible portion 34 of tubular body 12.
- a self-contained cuff 14 such as shown in Figure 1 A, is provided so that the air space within the cuff is completely isolated from the gas stream flowing through the tracheal tube 10.
- the self-contained cuff 14 then has an outer membrane 70 which is expanded against the trachea and an inner membrane 72 facing the open area in the tube wall.
- the end portions 74 are provided to seal cuff 14 to the outside surface of tubular body 12.
- Conduit 18 is used to inflate balloon 14.
- Cable 36 is threaded through a hole 44 in wall 26 of tubular body 12 near proximal end 20 of tubular body 12, as best shown in Figure 4. Cable 36 may run through the lumen of tubular body 12 or through a second passageway 46 in the wall of tubular body 12 to the vicinity of cuff 14 where it exits through wall 26 into space 48 enclosed by cuff 14. The distal end 50 of cable 36 is then attached to wall 26 of the tubular body 12 at a point 52 more distal from the exit point, but still within the space 48. Attachment may be by adhesives, clips, rings or other attachment devices or techniques known to those skilled in the art. Cable 36 may be formed from various materials. For example, it may be a thin wire, such as piano wire or surgical stainless wire, a plastic filament such as nylon monofilament, multifilament braided structures or sutures, or any other variety of materials typically used as sutures or tensioning cords.
- a handle or trigger 54 movable longitudinally within a slide channel 56 (Figs. 4 and 5).
- the proximal end of cable 36 is attached to trigger 54 so that when an operator retracts the trigger 54 in the direction indicated by the arrow in Figure 1 , the pulling force is transmitted to distal point 52 of cable attachment, causing tubular body 12 to bend in the area covered by cuff 14 and spring 42 to flex as shown in Figures 2 and 3.
- spring 42 causes tubular body 12 to return to the unbent configuration as shown in Figure 1.
- the trigger 54 and slide channel 56 may be so dimensioned that sufficient friction exists between these elements to retain the trigger 54 in its retracted position.
- Figures 6 and 7 show a modification of the first embodiment where a stretchable but substantially non-expandable membrane 58 covers flexible portion 34 to separate cable 36 and lumen of tubular body 12 from spring 42 and to prevent gas flowing through tubular body 12 from creating an expanding or pulsatile force on cuff 14.
- the membrane 58 acts as the inner membrane 72 of cuff 14 in Figure 1A and the cable passes through cuff 14 rather than between balloon inner membrane 72 and spring 42.
- the modification of Figures 6 and 7 functions in the same manner as the first embodiment.
- FIGS 8 and 9 show a further embodiment where flexible portion 34 is created by providing one or more notches 60 in wall 26 with bottom 62 of the notch 60 functioning as a hinge. While this embodiment does not show the use of the spring 42, a spring can be used within that portion of the tube for the same purposes as set forth above.
- a membrane 58 is shown covering the notch 60 and forming the inner membrane 72 of cuff 14.
- Figure 10 shows a cutaway view and Figure 11 shows an end view of an alternative embodiment of the endotracheal tube of the present invention having a distal end with an inner membrane 58 covering the spring 42.
- Figures 12 and 13 show a fifth embodiment of the present invention including a mechanism 80 for retaining the handle or trigger 82 in its fully retracted position.
- the embodiment of Figures 12 and 13 includes a universal connector 84 received by the proximal end of the endotracheal tube 12.
- the handle or trigger is attached to a cable 86 and is movable within a longitudinally extending slide channel 88 to bend or flex the distal end 90 of the endotracheal tube 12 as already explained.
- a pair of longitudinally extending, flexible retention members 94, 96 having opposed recesses 98, 100 for receiving and retaining the trigger 82 when the trigger is in its fully retracted position, as shown in Figures 12 and 13.
- This retention mechanism allows one-handed manipulation of the trigger as previously described.
- Figures 14 and 15 show a sixth embodiment of the invention which includes an alternative retention mechanism for holding the cable trigger 82 in its fully retracted position.
- a hook 110 rotatable about a vertical axis 112 is movable between a latched and unlatched position.
- the trigger 82 In the latched position, shown in Figures 14 and 15, the trigger 82 is held by the hook 110 in its fully retracted position. The trigger is released when the hook 110 is rotated clockwise, as seen in Figure 15.
- Figures 16-18 show a seventh embodiment of the invention which includes a curved, relatively rigid, sliding bar or flattened wire 120 to actuate the flexible distal tip 122.
- the bar or wire 120 is slidably disposed within a longitudinally extending groove or channel 124 formed in the wall of the tube 12, as best seen in Figures 17 and 18.
- a hook 126 on the proximal end of the bar or wire 120 is used to actuate the distal tip between its bent and unbent configurations.
- Figures 19 and 19A show an eighth embodiment of the invention in which, instead of a single cable for bending the distal tip, a pair of cables 130, 132 disposed within passageways 134, 136 within the wall 138 of the endotracheal tube 12 are used to flex or bend the distal tip in either of two directions along a y- axis shown in Figure 19.
- An alternative to this arrangement, providing for even greater versatility, is shown in the ninth embodiment of the invention in Figures 20 and 20A.
- four cables 140, 142, 144 and 146, disposed within passageways 148, 150, 152 and 154 spaced at 90° intervals within the wall 156 of the endotracheal tube 12 can be used to flex the tip in either direction along an x- axis, a y-axis or anywhere in between, thus providing the greatest degree of options so as to permit more precise control of the direction of the bending of the distal tip.
- Figures 21 and 22 show a tenth embodiment of the invention in which flexibility of the distal tip of the endotracheal tube is provided by a bellows section 160 within the cuff 162. Such a flexible bellows section allows movement of the distal tip in any direction while preserving the airtight integrity of the tube without any additional covering.
- the embodiment of Figures 21 and 22 includes a small baffle chamber 164 disposed along the underside of the bellows section 160 of the distal tip of the endotracheal tube. Air or fluid forced into this chamber by way of a small diameter tube 166 causes expansion of the small baffle chamber 164 against a fixed projection 168 extending from the underside of the bellows section.
- Figure 22 shows the distal tip of this embodiment in its flexed or bent configuration upon the introduction of air or other fluid under pressure into the small baffle chamber 164.
- FIG. 23-28 show an eleventh embodiment of the present invention.
- flexibility of the distal tip is provided by a V notch 170 formed in the underside of the distal end of the endotracheal tube 12.
- This V-shaped cutout or notch 170 is covered by a dual membrane, details of which are shown in Figures 25 and 26.
- a first flexible, inner membrane 172 including laterally oriented corrugations 174 is configured to nest within a similar, outer flexible membrane 176 also including laterally disposed corrugations 178.
- the corrugations allow expansion of the membranes.
- the membranes are bonded together along their edges 180, 182 so as to define an enclosed space 184 therebetween. Air or fluid under pressure is supplied to this space by means of a small diameter tube 186.
- Figures 27 and 28 show the distal tip of the endotracheal tube of this embodiment in its unflexed or unbent configuration and in its bent or flexed configuration when air or other fluid is forced into the space 184 between the inner and outer
- Figures 29 and 30 show a twelfth embodiment of the invention comprising an endotracheal tube having a distal end including a cuff, as already described.
- a V-shaped cutout or notch 190 is formed in the distal end of the endotracheal tube 12 within the confines of the cuff.
- Inserted into the lower end of the V-shaped notch 190 is an expandable balloon 192 having a distal extremity 194 and a proximal extremity 196.
- the distal extremity 194 is sealed while the proximal extremity receives the distal end of a small diameter tube 198.
- the distal end of the tube 198 is bonded or otherwise secured in fluid-tight fashion within the proximal end 196 of the balloon. Air or other fluid forced into the balloon causes expansion thereof and flexing or bending of the distal end of the endotracheal tube, as best seen in Figure 30.
- FIGS. 21-30 show the small diameter tubes 166, 186 and 198 for supplying air or other fluid to the baffle chamber 164, dual membrane 172, 176, and balloon 192.
- the small diameter tubes are illustrated as co-extruded to the exteriors of the primary tubular bodies. However, the small diameter tubes can also be co-extruded to the interiors of the primary tubular bodies. Alternatively, the small diameter tubes can extend within the passageways in the walls of the primary tubular bodies in a similar fashion to the conduit 18 illustrated in Figure 1. Also, the passageways in the walls themselves can constitute the air-tight or fluid-tight small diameter tubes in which case the small diameter tubes are sealed into the proximal ends of passageways.
- any portion of the tube can be caused to bend by providing a cable exiting through the tube wall before the desired bendable section and attaching the cable proximal thereto. Pulling on the cable bends the tube within that portion where the cable is external to the tube.
- the inflatable cuff in neither needed nor desirable.
- the endotracheal tube forms a seal with the interior walls of the trachea without use of the inflatable cuff, and elimination of the cuff reduces the thickness of the device for easier insertion and manipulation.
- the cuffless device of the present embodiment can be used for applications other than as an endotracheal tube, for example, as a cannula for insertion into a human or animal body.
- Figures 31 a, 31 b and 32 show a further embodiment in which one or two membranes are used rather than the inflatable cuff as described above.
- a flexible portion 202 of the tube is created by providing one or more notches 204 in a wall 206 with a bottom 208 of the notch functioning as a hinge.
- An outer membrane 210 covers the notch 204.
- An inner membrane 212 may be placed inside the tube in which case a cable 214 of the pulling mechanism is located between the outer membrane 210 and the inner membrane 212.
- the outer membrane 210 protects the walls of the body passage into which the tube is inserted from coming into contact with the cable.
- the outer membrane 210 can be sealed to the outer surface of the tube forming a fluid-tight seal.
- the inner membrane 212 can be sealed to the inner surface of the tube to form a fluid-tight seal.
- Figure 32 shows the cable 214 creating a temporary bend in the flexible portion of the tube covered by the membrane.
- the cable 214 extends from the proximal end 216 of the tube through a proximal end of the portion of the tube covered by the membrane, extending between the flexible portion 202 and the outer membrane 210.
- the distal end of the cable 214 is attached to the wall 206 distal to the notch 204.
- the cable 214 can be attached to the wall 206, for example, at a position distal to (as illustrated in Figure 31a) or below (as illustrated in Figure 34) the outer membrane 210.
- a pulling force is applied to the proximal end of the cable 214 at the proximal end 216 of the tube.
- the flexible portion 202 of the tube need not include a notch, but can formed in other ways.
- the tube can be formed from a polymeric material with the portion of the tube forming the flexible portion 202 being a polymer of different chemical properties having a greater flexibility than surrounding portions of the tube.
- the flexible portion 202 can be heat, ultrasound or UV radiation treated to create flexibility greater than surrounding portions of the tube.
- an inflatable cuff 228 can be used with the embodiment of Figure 31a.
- the flexible portion of the tube 202 need not be within the inflatable cuff 228.
- the inflatable cuff 228 can be positioned proximate to the flexible portion 202 (as illustrated Figure 34), can be positioned distal to the flexible portion 202, or can surround the flexible portion 202 (as illustrated in Figure 8).
- Figure 33 shows flexible portions created by a plurality of notches 220- 226.
- Figure 33 shows the notch 226 oriented 180 degrees from the notches 220, 222, 224 relative to the axis of the tube. This allows bending of the tube in directions within a plane.
- the notches can be oriented anywhere 360 degrees around the axis of the tube allowing the bending of the tube in directions outside of the plane.
- the multiple notches can be controlled by multiple cables oriented similarly to those shown in Figures 19, 19a, 20 and 20a.
- Each notch can have a cable that exits through the wall at the proximal end of the notch which then attaches to the wall just distal of the notch.
- the flexible portion of the tube need not include a notch, but can formed in other ways.
Abstract
Description
Claims
Priority Applications (13)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IS7278A IS7278A (en) | 2001-11-26 | 2001-05-21 | Tracheal tubing with steerable end and positioning equipment |
BRPI0117186-0A BR0117186B1 (en) | 2001-11-26 | 2001-11-26 | endotracheal tube with directional tip control and position locking mechanism. |
EP01987102A EP1448258A4 (en) | 2001-11-26 | 2001-11-26 | Endotracheal tube with tip directional control and position preserving mechanism |
PCT/US2001/044296 WO2003045485A1 (en) | 1999-09-27 | 2001-11-26 | Endotracheal tube with tip directional control and position preserving mechanism |
CA002468108A CA2468108A1 (en) | 1999-09-27 | 2001-11-26 | Endotracheal tube with tip directional control and position preserving mechanism |
JP2003546982A JP2005510310A (en) | 2001-11-26 | 2001-11-26 | Breathing tube with tip direction control and position maintenance mechanism |
KR10-2004-7007854A KR20040062641A (en) | 2001-11-26 | 2001-11-26 | Endotracheal tube with tip directional control and position preserving mechanism |
CNB018238270A CN100352520C (en) | 2001-11-26 | 2001-11-26 | Endotracheal tube with tip directional control and position preserving mechanism |
AU2002239351A AU2002239351B2 (en) | 2001-11-26 | 2001-11-26 | Endotracheal tube with tip directional control and position preserving mechanism |
IL16197101A IL161971A0 (en) | 2001-11-26 | 2001-11-26 | Endotracheal tube with tip directional control andposition preserving mechanism |
MXPA04004961A MXPA04004961A (en) | 2001-11-26 | 2001-11-26 | Endotracheal tube with tip directional control and position preserving mechanism. |
US09/994,238 US6553993B2 (en) | 1999-09-27 | 2001-11-27 | Endotracheal tube with tip directional control and position preserving mechanism |
NO20042169A NO20042169L (en) | 2001-11-26 | 2004-05-26 | Endotracheal rudder with control and fixation of the direction of the end piece |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/405,750 US6321749B1 (en) | 1999-09-27 | 1999-09-27 | Endotracheal tube with tip directional control and position preserving mechanism |
PCT/US2001/044296 WO2003045485A1 (en) | 1999-09-27 | 2001-11-26 | Endotracheal tube with tip directional control and position preserving mechanism |
US09/994,238 US6553993B2 (en) | 1999-09-27 | 2001-11-27 | Endotracheal tube with tip directional control and position preserving mechanism |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003045485A1 true WO2003045485A1 (en) | 2003-06-05 |
Family
ID=27738962
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2001/044296 WO2003045485A1 (en) | 1999-09-27 | 2001-11-26 | Endotracheal tube with tip directional control and position preserving mechanism |
Country Status (3)
Country | Link |
---|---|
US (1) | US6553993B2 (en) |
CA (1) | CA2468108A1 (en) |
WO (1) | WO2003045485A1 (en) |
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JP2010158543A (en) * | 2003-09-08 | 2010-07-22 | Laryngeal Mask Co Ltd | Laryngeal mask airway device with position controlling tab |
US9364628B2 (en) | 2011-04-28 | 2016-06-14 | Yonsei University Wonju Industry-Academic Cooperation Foundation | Curvature-adjustable endotracheal tube |
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JP2010158543A (en) * | 2003-09-08 | 2010-07-22 | Laryngeal Mask Co Ltd | Laryngeal mask airway device with position controlling tab |
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US11850362B2 (en) | 2013-09-23 | 2023-12-26 | Naga Wire-Tracking Tracheal Tube Pty Ltd | Endotracheal tube and method of use |
Also Published As
Publication number | Publication date |
---|---|
CA2468108A1 (en) | 2003-06-05 |
US20020043266A1 (en) | 2002-04-18 |
US6553993B2 (en) | 2003-04-29 |
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