CN2792524Y

CN2792524Y - Cannula conduit with variable diameter

Info

Publication number: CN2792524Y
Application number: CN200520049943.XU
Authority: CN
Inventors: 张治明; 张安生
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-05-01
Filing date: 2005-05-01
Publication date: 2006-07-05
Anticipated expiration: 2015-05-01

Abstract

The utility model relates to a tracheal tube with variable diameter, which belongs to a medical device and is composed of a main air guiding tube (1), a leak proof air bag (2), joints (3) and an air filling tube (4), wherein the section close to the ends of the joints (3) of the main air guiding tube is provided with a circular tube; the section of the main air guiding tube from the middle part to oblique surface-shaped end openings (5) is provided with an elastic wall tube with C-shaped cross sections; longitudinal gap which is formed by the section of the C-shaped tube is provided with a ripple-shaped telescopic air bag (6). The utility model is used as an inserting tube for the general anesthesia for serious patients in salvage and is used for great operations for an oral cavity dentofacial surgery, an E. N. T. department, a neurosurgery, etc. When the tracheal tube is difficult to insert facing to difficult cases, the utility model can add the success ratio.

Description

But the endotracheal tube of reducing

Technical field

This utility model relates to medical apparatus and instruments, but relates in particular to the endotracheal tube of operation with reducing.

Background technology

As everyone knows, when the patient being implemented capital operations such as Oral and Maxillofacial Surgery, department of otorhinolaryngology, neurosurgery the doctor and critical patient when rescuing, in order to allow patient keep certain lung ventilation amount at intra-operative, often will be to the patient's trachea intubate, this just need use endotracheal tube.In some cases; can run into the relatively case of difficulty of intubate; at this moment; usually can use small size endotracheal tube; make intubate become relatively easy; but small size endotracheal tube must increase the resistance of air flue, may make the patient ventilating quantity not sufficient and the patient respiration acting that autonomous respiration is arranged is increased.

The endotracheal tube length of using has 30-35cm at present, constitute by air-guide main tube 1, leakproof air bag 2, joint 3, gas tube 4, air-guide main tube 1 is resilient thick-walled pipe, there is the smooth opening of inclined plane shape the one end, peristome is gone up place's outer wall slightly and is combined with the leakproof air bag 2 that can inflate, and air-guide main tube 1 the other end is uncovered and the joint 3 of can pegging graft; Joint 3 is reducing joint, and its small end inserts for 1 one-tenths with the air-guide main tube and cooperates, and its big end internal diameter becomes the grafting cooperation with the connection tube external diameter, and joins by connection tube and respiratory organ and anesthetic machine; Gas tube 4 is located in the air-guide main tube 1, and the one end passes and is connected with leakproof air bag 2 from the sealing-in of main gas tube tube wall, and its other end passes and leave extension from the tube wall sealing-in of air-guide main tube 1 center.This endotracheal tube in general anesthesia, has its irreplaceable positive role, so use till today always.Endotracheal tube inserts trachea from patient's nasal cavity or oral cavity, so it should have certain flexible and elasticity, the smooth curve shape that natural torsion becomes to conform to the insertion section after insertion is normal beyond doubt.But, because its diameter is changeless.And person's windpipe and mouthful, pharyngeal anatomy relationship unusual, in the tracheal intubation process, its maximum outside diameter must be littler than the minimum diameter of people's air flue, the very difficulty otherwise endotracheal intubation will become, when running into the patient of difficult intubation or carrying out the patient of nasal cavity intubate, can only change more small-bore conduit, this just makes airway resistance obviously increase, ventilation is restricted, and has had a strong impact on carrying out smoothly and rescue fast and effectively of anesthesia.

Summary of the invention

But the endotracheal tube of the reducing that the purpose of this utility model is a kind of ventilation of design can be increased, during intubate, insert trachea with less diameter, this moment, not only intubate was more smooth, and it is also less to the damage that causes around the larynx, after inserting trachea,, can guarantee patient's effective ventilation by enlarging the interior external diameter of trachea simultaneously.

The purpose of this utility model is to realize like this; But on the basis of the endotracheal tube that uses at present, designed a kind of endotracheal tube of reducing, constitute by air-guide main tube, leakproof air bag, joint, gas tube, air-guide main tube's an end grafting joint, the other end port that takes the form of inclined plane, by the outside leakproof air bag that connects of the pipe of port, gas tube is connected with the leakproof air bag by the sealing-in of main gas tube wall; The segment section that the air-guide main tube is abutted against head end is a round tube, from the middle part to the segmentation of inclined plane shape port part be the elastic wall pipe that the cross section is " C " shape, on the longitudinal slot that this section is made of " C " shape pipe a corrugated extension airbag is arranged, this extension airbag connects second gas tube by the sealing-in of main gas tube wall.When preventing that the air-guide main tube from inflating, extension airbag inwall blow-up is stopped up air flue, is furnished with the lacing wire film in the cavity of extension airbag.In order to make under the inflated condition air-guide main tube front and back end isometrical, reduce vapour lock, it is the intersection that the cross section is " C " shape pipeline section that described air-guide main tube can make in 1 cross section by circular pipeline section transition, caliber is level and smooth from large to small taper.

When using reducing type endotracheal tube of the present utility model, its intubate position is superimposed shape when the corrugated extension airbag is not inflated, and " C " shape pipe nature of flexible wall shrinks, and the endotracheal tube front portion becomes the conduit than minor diameter.When inserting the back inflation, the extension airbag chamber trails, and is equivalent to make the chap of conduit caliber, thereby reduces aeration resistance, reduces work when breathing.In addition, because the scrambling of air flue itself, the reducing conduit can fully adapt to air flue after inserting.Through experiment, the conduit caliber that inserts air flue increases more than 0.3 times, and the road resistance reduces more than 70%.When airway pressure was constant, ventilation increased by 30%.

Description of drawings

Fig. 1 is this utility model overall structure sketch map;

Fig. 2 is an A portion enlarged diagram;

I-I section work sketch map when Fig. 3 is the embodiment intubate;

I-I section work sketch map when Fig. 4 inflates for embodiment.

In the accompanying drawing: 1 air-guide main tube; 2 leakproof air bags; 3 joints; 4 gas tubes; 5 inclined plane shape ports; 6 extension airbags; 7 second gas tubes; 8 lacing wire films.

The specific embodiment

Below in conjunction with drawings and Examples this utility model is further specified.

But present embodiment is a kind of endotracheal tube of reducing, constitute by air-guide main tube 1, leakproof air bag 2, joint 3, gas tube 4, an end grafting joint 3 of air-guide main tube 1, the other end port 5 that takes the form of inclined plane, by the outside leakproof air bag 2 that connects of the pipe of port 5, gas tube 4 is connected with leakproof air bag 2 by the sealing-in of main gas tube wall, being abutted against a segment section of 3 ends air-guide main tube 1 is round tube, from the middle part to inclined plane shape port 5 segment sections be the elastic wall pipe that the cross section is " C " shape, on the longitudinal slot that this section is made of " C " shape pipe, a corrugated extension airbag 6 is arranged; Extension airbag 6 usefulness medical grade rubbers are made, and are furnished with lacing wire film 8 in its cavity.Second gas tube 7 that this extension airbag 6 connects by the sealing-in of main gas tube wall.

Claims

But 1, a kind of endotracheal tube of reducing, constitute by air-guide main tube (1), leakproof air bag (2), joint (3), gas tube (4), air-guide main tube's (1) an end grafting joint (3), the other end port (5) that takes the form of inclined plane, by the outside leakproof air bag (2) that connects of the pipe of port (5), gas tube (4) is connected with leakproof air bag (2) by the sealing-in of main gas tube wall, it is characterized in that; The segment section that air-guide main tube (1) is abutted against head (3) end is a round tube, from the middle part to inclined plane shape port (5) segment section be the elastic wall pipe that the cross section is " C " shape, on the longitudinal slot that this section is made of " C " shape pipe a corrugated extension airbag (6) is arranged, this extension airbag (6) connects second gas tube (7) by the sealing-in of main gas tube wall.
But 2, the endotracheal tube of reducing according to claim 1 is characterized in that: be furnished with lacing wire film (8) in the cavity of described corrugated extension airbag (6).
But 3, the endotracheal tube of reducing according to claim 1 is characterized in that: described air-guide main tube (1) cross section is the intersection that the cross section is " C " shape pipeline section by circular pipeline section transition, and caliber is level and smooth from large to small taper.