Laryngoscope insertion section
A laryngoscope insertion section comprising a tube guide including at least an inferior tube guiding member and a superior tube guiding member, wherein the thickness of the insertion section in a first region is less than the external diameter of the largest diameter endotracheal tube in an operating range of endotracheal tube sizes plus the thickness of the inferior tube guiding member plus the thickness of the superior tube guiding member. Typically, the insertion section comprises an elongate member and the tube guide is lateral of the elongate member. Typically, an endotracheal tube is retained within the tube guide in flexural tension.
1. An elongate laryngoscope insertion section having a proximal end and a distal end for insertion into a patient's oral cavity in use, the elongate laryngoscope insertion section comprising a tube guide for removably retaining an endotracheal tube and guiding a retained endotracheal tube towards a patient's larynx, the tube guide comprising a plurality of tube guiding members having tube guiding surfaces which are arranged to contact and thereby guide an inferior surface or a superior surface of the retained endotracheal tube, the plurality of tube guiding members comprising at least an inferior tube guiding member having a tube guiding surface on a superior side thereof for contacting and thereby guiding the inferior surface of the retained endotracheal tube, and first and second superior tube guiding members each of which has a tube guiding surface on an inferior side thereof for contacting and thereby guiding the superior surface of the retained endotracheal tube, wherein the second superior tube guiding member is proximal of the first superior tube guiding member and the tube guiding surfaces of the first and second superior tube guiding members are spaced apart, wherein the tube guide is arranged to leave exposed the inferior surface of the retained endotracheal tube opposite the tube guiding surface of the second superior tube guiding member, and wherein the distal end of the tube guiding surface of the second superior tube guiding member is spaced apart from and proximal of the proximal end of the tube guiding surface of the inferior tube guiding member, such that the endotracheal tube can be introduced into the tube guide between the proximal end of the tube guiding surface of the inferior tube guiding member and the distal end of the tube guiding surface of the second superior tube contacting member at an angle to the length of the elongate laryngoscope insertion section at the proximal end of the tube guiding surface of the inferior tube guiding member.
2. An elongate laryngoscope insertion section according to claim 1 , wherein the tube guiding surface of the first superior tube contacting member extends inferiorly towards its distal end and the tube guiding surface of the second superior tube contact member extends superiorly towards its distal end.
3. An elongate laryngoscope insertion section according to claim 1 , wherein, in use, the tube guide contacts the inferior surface of the retained endotracheal tube intermediate the most proximal and most distal locations where the tube guide contacts the superior surface of the retrained endotracheal tube, such that the retained endotracheal tube exerts a superior force on the tube guide at the most proximal and most distal locations where the tube guide contacts the superior surface of the a retained endotracheal tube and an inferior force at the said location where the tube guide contacts the inferior surface of the a retained endotracheal tube.
4. An elongate laryngoscope insertion section according to claim 1 , wherein the tube guide is arranged such that the retained endotracheal tube can be removed laterally from the tube guide.
5. An elongate laryngoscope insertion section according to claim 1 , wherein the elongate laryngoscope insertion section comprises an elongate member which extends along the majority of the length of the elongate laryngoscope insertion section, with the tube guide being arranged to retain the endotracheal tube laterally of the elongate member.
6. A laryngoscope comprising a handle, and the elongate laryngoscope insertion section according to claim 1 .
7. A laryngoscope according to claim 6 , wherein the elongate laryngoscope insertion section is fixedly attached to the handle.
8. An elongate laryngoscope insertion section according to claim 1 , wherein the tube guide is arranged to receive the endotracheal tube such that the endotracheal tube extends distally and superiorly between a proximal end of the tube guiding surface of the inferior tube guiding member and a distal end of the tube guiding surface of the second superior tube guiding member.
9. An elongate laryngoscope insertion section according to claim 1 , wherein the tube guide is arranged so that the a retained endotracheal tube is continuously curved from the most proximal location where the tube guide contacts the superior surface of the a retained endotracheal tube to the most distal location where the tube guide contacts the superior surface of the retained endotracheal tube.
10. An elongate laryngoscope insertion section according to claim 9 , wherein said curvature is constant.
11. An elongate laryngoscope insertion section according to claim 1 , wherein the tube guiding surface of the inferior tube guiding member is entirely proximal of the tube guiding surface of the first superior tube guiding member.
12. An elongate laryngoscope insertion section according to claim 1 , wherein the elongate laryngoscope insertion section is arranged such that the retained endotracheal tube remains exposed along an entire lateral side.
13. An elongate laryngoscope insertion section according to claim 1 , wherein the elongate laryngoscope insertion section comprises a curved portion such that the inferior surface of the insertion section is incurvate and the superior surface of the insertion section is excurvate and the first superior tube guiding member is located sufficiently distally of the first region to guide a retained tube at an angle of at least 20° to an angle at which a retained tube is guided at the proximal end of the insertion section.
14. An elongate laryngoscope insertion section having a proximal end and a distal end for insertion into a patient's oral cavity in use, the elongate laryngoscope insertion section comprising a tube guide for removably retaining an endotracheal tube and guiding a retained endotracheal tube towards a patient's larynx and an elongate member, wherein the tube guide comprises a plurality of tube guiding members which extend laterally of the elongate member and have tube guiding surfaces which are arranged to contact and thereby guide an inferior surface or a superior surface of the a retained endotracheal tube, the plurality of tube guiding members comprising at least an inferior tube guiding member having a tube guiding surface on a superior side thereof for contacting and thereby guiding the inferior surface of the retained endotracheal tube, and a first superior tube guiding member having a tube guiding surface on an inferior side thereof for contacting and thereby guiding the superior surface of the a retained endotracheal tube, wherein there is at least one location, proximal of the first superior tube guiding member, where the endotracheal tube is retained in use laterally of the elongate member with the inferior and superior sides of the endotracheal tube being left exposed.
15. An elongate laryngoscope insertion section according to claim 14 , wherein no tube guiding member is provided at the said location.
16. An elongate laryngoscope insertion section according to claim 14 , wherein the said location is intermediate the first superior tube guiding member and a second superior tube guiding member.
17. A laryngoscope comprising a handle, and the elongate laryngoscope insertion section according to claim 14 .
18. A laryngoscope according to claim 17 , wherein the elongate laryngoscope insertion section is fixedly attached to the handle.
19. An elongate laryngoscope insertion section according to claim 14 , wherein the tube guide is arranged so that the a retained endotracheal tube is continuously curved from the most proximal location where the tube guide contacts the superior surface of the retained endotracheal tube to the most distal location where the tube guide contacts the superior surface of the retained endotracheal tube.
20. An elongate laryngoscope insertion section according to claim 14 , wherein said curvature is constant.
21. An elongate laryngoscope insertion section according to claim 14 , wherein the elongate laryngoscope insertion section is arranged such that the a retained endotracheal tube is retained with its lateral side at least partially exposed along the entire length of the elongate laryngoscope insertion section.
22. An elongate laryngoscope insertion section according to claim 14 , further comprising a second superior tube guiding member, which is proximal of the first superior tube guiding member, and said location is intermediate the first and second superior tube guiding members.