WO2017035836A1 - Method for manufacturing endotracheal intubation tube and endotracheal intubation tube - Google Patents

Abstract

Disclosed is a method for manufacturing an endotracheal intubation tube, comprising the following steps: manufacturing an integral mould (200) used for manufacturing an airbag (20), wherein an inner cavity (202) is arranged inside the mould (200); filling the mould (200) with a PVC slurry; pouring out the PVC slurry, and reserving the PVC slurry left on the inner wall of the mould (200); passing a guide tube (500) through the mould (200); sleeving the guide tube (500) with a tube body (10) and passing the tube body through the mould (200); withdrawing the guide tube (500); respectively inserting a first core (300) and a second core (400) into the tube body (10) and docking the cores, and laminating the tube body (10) to the inner wall at the end of the inner cavity (202); rotating the mould (200) and heating it; and exhausting the air inside the airbag (20) and demoulding, wherein the docking position of the first core (300) and the second core (400) is at the middle of the inner cavity (202). Also provided is an endotracheal intubation tube (100) manufactured by the above-mentioned method for manufacturing an endotracheal intubation tube. Since heating and rotating the mould (200) are carried out at the same time, the PVC slurry on the inner wall of the mould (200) may not be aggregated during the heating and maturing process, and the PVC slurry on the inner wall of the complete mould (200) is made to be homogeneous. Accordingly, the wall thickness of the manufactured airbag (20) is relatively homogeneous and there are no steps on the two ends of the airbag (20).

Description

Endotracheal intubation manufacturing method and tracheal intubation Technical field

The invention relates to a method for manufacturing an endotracheal tube and a tracheal intubation.

Background technique

Tracheal intubation is a specialized operation of the clinical rescue of critically ill patients, surgical anesthesia and cardiopulmonary resuscitation, etc., by inserting a special tracheal tube into the trachea through the patient's mouth or nasal cavity. The tracheal intubation generally comprises a membrane type air bag, a tube body, an inflation tube and an indicator ball air bag. The air bag is set at the insertion end of the tube body, the indicating ball air bag is located at one end of the air tube, and the other end of the air tube is connected with the tube body. However, the existing airbag is made by blow molding, and the airbag thus produced not only has a mold clamping line on the outer surface, but also has a non-uniform thickness on the airbag wall and has a step at both ends of the airbag, when the air tube cannula is inserted into the air tube. Make the patient feel uncomfortable and can damage the patient's trachea. Therefore, according to the clinically more scientific and humanized treatment needs, it is imperative to improve and innovate the existing tracheal intubation.

Summary of the invention

It is an object of the present invention to provide a method and a tracheal intubation for manufacturing an endotracheal tube having a uniform wall thickness of a balloon.

In order to solve the above problems, the present invention provides the following technical solutions.

The invention provides a method for manufacturing an endotracheal tube, which comprises the steps of: manufacturing an integral mold for forming an air bag, the mold is provided with an inner cavity; pouring polyvinyl chloride (PVC) pulp into the mold; pouring out the PVC Slurry, retaining the PVC slurry remaining on the inner wall of the mold; the tube body passes through the mold; the first core and the second core Inserting into the pipe body and abutting, so that the pipe body and the inner wall of the inner cavity end are attached; rotating the mold and heating; and removing the gas in the air bag and demoulding; wherein the first core and the second core are in abutment position The middle of the cavity.

The present invention also provides another method for manufacturing a tracheal intubation, comprising the steps of: manufacturing an integral mold for forming an air bag, the mold is provided with an inner cavity; pouring the PVC slurry into the mold; pouring the PVC slurry, leaving the residual in the mold The inner wall of the PVC slurry; the guiding tube passes through the mold; the tube body is set on the guiding tube and passes through the mold; the guiding tube is taken out; the first core and the second core are respectively inserted into the tube body and connected to each other to make the tube body and the inner cavity The inner wall of the end is fitted; the mold is rotated and heated; and the gas in the air bag is removed and demolded; wherein the abutting position of the first core and the second core is in the middle of the inner cavity.

Wherein, the cooling mold is further included before the step of removing the gas in the airbag and demolding.

Wherein, the maximum inner diameter of the first core and the second core is slightly larger than the inner diameter of the pipe body.

Wherein the first core comprises a first end portion, a first tapered portion, a first supporting portion and a second end portion, the first tapered portion is tapered, and the diameter of the first tapered portion is from the first end portion to the first support The portion is incremented, and the first end portion is provided with a receiving groove.

Wherein, the second core comprises a third end portion, a second tapered portion, a second supporting portion and a fourth end portion, the second tapered portion is tapered, and the diameter of the second tapered portion is increased from the third end portion to the second supporting portion The third end portion is received in the receiving groove.

Wherein the diameters of the first support portion and the second support portion are the same and largest, the diameter of the second end portion and the maximum diameter of the first tapered portion are smaller than the diameter of the first support portion, the diameter of the fourth end portion and the second cone The maximum diameter of the portion is smaller than the diameter of the second support portion.

The cross section of the third end portion is the same as the cross section of the receiving groove and is polygonal.

The third end portion is a cylindrical shape having a plurality of convex strips on the outer surface, the receiving groove has a circular cross section, and the inner wall of the receiving groove is provided with a plurality of grooves for receiving the protruding strips.

Wherein, the diameters of the second end portion and the fourth end portion are both smaller than the diameter of the tubular body.

Wherein, the first core or the second core is curved, and the curvature of the first core or the second core is curved in conformity with the curvature of the tubular body.

Wherein, the shape of the inner cavity is consistent with the outer shape of the airbag and is provided with a passage through which the tubular body passes.

Among them, the temperature at which the mold is heated is the temperature at which the PVC matures.

The present invention also provides an endotracheal tube made by the above-described tracheal intubation manufacturing method.

The tracheal intubation manufacturing method of the invention uses the mold to rotate the mold while heating, so that the PVC slurry on the inner wall of the mold does not coalesce together during the heating and maturing process, and the PVC slurry on the inner wall of the entire mold is uniform, thereby The wall thickness of the airbag is relatively uniform and there is no step at both ends of the airbag, that is, the thickness of the end portion of the airbag is the same as the thickness of the airbag, which solves the problem that the thickness of the airbag end made by the blow molding method is larger than that of the airbag in the prior art. The thickness is a problem of forming a step at the end of the airbag.

DRAWINGS

1 is a schematic flow chart of a method for manufacturing an endotracheal tube according to a first embodiment of the present invention.

Figure 2 is a schematic cross-sectional view showing the insertion of the tube into the mold.

Figure 3 is a perspective view of the first core.

4 is a perspective view of the second core.

Figure 5 is a cross-sectional view showing the docking of the first core and the second core.

Figure 6 is an enlarged view of a circle VI in Figure 5.

FIG. 7 is a schematic flow chart of a method for manufacturing an endotracheal tube according to a second embodiment of the present invention.

Figure 8 is a schematic cross-sectional view of the guide tube.

Figure 9 is a perspective view of the tracheal intubation of the present invention.

detailed description

Referring to FIG. 1 , FIG. 2 , FIG. 3 , FIG. 4 and FIG. 9 , a method for manufacturing an endotracheal tube provided by a first embodiment of the present invention includes the following steps: in step 101 , manufacturing an entire airbag 20 . The mold 200 includes a cavity 202; in step 102, a polyvinyl chloride (PVC) slurry is poured into the mold 200; in step 103, the PVC slurry is poured out, and the PVC slurry remaining on the inner wall of the mold 200 is retained; In step 104, the tubular body 10 passes through the mold 200; in step 105, the first core 300 and the second core 400 are inserted into the tubular body 10, respectively, and the tubular body 10 is bonded to the inner wall of the inner cavity 202. In step 106, the mold 200 is rotated and heated; in step 107, the gas in the air bag 20 is removed and demolded; wherein the docking position of the first core 300 and the second core 400 is in the middle of the inner cavity 202.

In the present embodiment, the first core 300 and the second core 400 are interference fit to prevent the first core 300 and the second core from being accidentally disengaged.

In the present embodiment, the end portion of the inner cavity 202 is short, which is substantially the thickness of the inner wall 202 of the mold 200, so that the airbag 20 made of the mold 200 of the present invention has almost no end portion, so that the airbag 20 and the tube body 10 are fitted. Tight, no transition, i.e., the junction of the bladder 20 and the tubular body 10 has no transition ends.

Since the mold 200 of the present invention rotates while heating, the PVC slurry on the inner wall of the mold 200 does not coalesce during heating and maturing, because during the rotation, the liquid slurry flows as the mold 200 rotates and Flowing from a thicker place to a thinner place, the PVC paste does not coalesce and the PVC slurry on the inner wall of the entire mold 200 is uniform, so that the wall thickness of the finished air bag 20 is relatively uniform and is at both ends of the air bag 20. There is no step, that is, the thickness of the end portion of the airbag 20 and the thickness of the airbag 20 are the same, which solves the problem in the prior art that the thickness of the end portion of the airbag 20 made by blow molding is greater than the thickness of the middle portion of the airbag 20 at the end of the airbag 20. The problem of forming a step.

Further, since the PVC slurry is in a liquid state, when the PVC slurry in the mold 200 is poured out, the PVC slurry remaining on the inner wall of the mold 200 is relatively uniform, unless the accidental touch causes the PVC slurry to be touched to be thin, but Since the mold 200 rotates while heating, the PVC slurry flows along with the rotation of the mold 200 and flows from a thick place to a thinner place, further ensuring the uniformity of the PVC slurry on the inner wall of the mold 200, thereby securing the wall of the airbag 20 Thick uniformity. Moreover, it is not because the mold 200 is in a stationary state during the heating process, and the PVC slurry at a high position of the mold 200 is dropped to a lower portion of the mold 200, resulting in uneven wall thickness of the formed airbag 20.

Further, since the mold 200 of the present invention is an integral mold, that is, not a separate upper and lower molds, the outer surface of the airbag 20 formed by such an integral mold 200 has no mold line.

The airbag 20 made by the invention not only has no clamping line on the outer surface, but also has a uniform wall thickness and no steps at both ends. When the tracheal tube 10 is inserted into the patient's trachea, the patient does not feel uncomfortable and does not damage the patient. The trachea solves the discomfort and damage to the trachea caused by the clamping line of the outer surface of the air bag 20 and the step of the end of the air bag 20 in the prior art.

Further, since the thickness of the end portion of the air bag 20 and the thickness of the air bag 20 are uniform, and the wall thickness of the air bag 20 is thin, and there is no transition at the junction of the air bag 20 and the tube body 10, when the tube body 10 is inserted into the patient's trachea, the patient The discomfort is minimized, and the damage to the patient's trachea is also minimized, further solving the problem of discomfort and discomfort caused by the transition of the balloon 20 and the tube 10 due to the thicker end of the balloon 20 in the prior art. Tracheal damage.

In other embodiments, cooling the mold 200 is also included prior to step 107.

In the present embodiment, the temperature at which the mold 200 is heated is a temperature at which the PVC matures, for example, 120 to 130 degrees. At the same time, the temperature at which the mold 200 is heated is related to the concentration of the PVC slurry, the rotational speed of the mold 200, and the ambient temperature.

Referring to FIGS. 2 and 9, the mold 200 is provided with an inner cavity 202 having a shape conforming to the outer shape of the air bag 20 and provided with a passage 204 through which the pipe body 10 passes.

Referring to FIGS. 2-6 and 9, the maximum inner diameter of the first core 300 and the second core 400 is slightly larger than the inner diameter of the tubular body 10. When the first core 300 and the second core 400 are inserted into the tubular body 10, since the maximum inner diameter of the first core 300 and the second core 400 is slightly larger than the inner diameter of the tubular body 10, the tubular body 10 is closely fitted to both ends of the mold 200. unit.

Further, the first core 300 includes a first end portion 301, a first tapered portion 303, a first support portion 304 and a second end portion 305, the first tapered portion 303 is tapered, and the diameter of the first tapered portion 303 is from The first end portion 301 is incremented toward the first support portion 304, and the first end portion 301 is provided with a receiving groove 302. The second core 400 includes a third end portion 401, a second tapered portion 403, a second support portion 404, and a fourth end portion 405. The second tapered portion 403 is tapered, and the second tapered portion 403 has a diameter from the third end portion 401. The second support portion 404 is incremented, and the third end portion 401 is received in the receiving groove 302. The diameters of the first support portion 304 and the second support portion 404 are the same and largest, the maximum diameter of the first tapered portion 303 is equal to the diameter of the first support portion 304, and the maximum diameter of the second tapered portion 403 is equal to the diameter of the second support portion 404. The diameter of the second end portion 305 is smaller than the diameter of the first support portion 304, the diameter of the fourth end portion 405 is smaller than the diameter of the second support portion 404, and the diameter of the second end portion 305 and the diameter of the fourth end portion 405 are both smaller than The inner diameter of the tubular body 10. The lengths of the first support portion 304 and the second support portion 404 are both short and correspond to the end length of the inner cavity 202. When the first core 300 and the second core 400 are inserted into the tubular body 10, the first support portion 304 and the first The two supporting portions 404 respectively press the tube body 10 so that the tube body 10 abuts against the inner walls of both end portions of the inner cavity 202.

In the present embodiment, the third end portion 401 has a polygonal cross section, such as a square, a hexagon, or an octagon. The cross-sectional shape of the receiving groove 302 is the same as the cross-sectional shape of the third end portion 401, and is also a polygon. After the end portion 401 is received in the receiving groove 302, the first core 300 and the second core 400 are not easily peeled off. Moreover, there is no relative rotational relationship between the first core 300 and the second core 400, that is, the second core 400 does not rotate relative to the first core 300, so that during the rotation of the mold 200, the first core 300 and the second core 400 are simultaneously The rotation further ensures the uniformity of the wall thickness of the airbag 20.

In other embodiments, the third end portion 401 is a cylindrical shape having a plurality of ribs on the outer surface, the receiving groove 302 has a circular cross section, and the inner wall of the receiving groove is provided with a plurality of grooves for receiving the ribs, so that The first core 300 and the second core 400 are not only not easily detached, but also have no relative rotational relationship between the first core 300 and the second core 400.

Since the abutting position of the first core 300 and the second core 400 is in the middle of the inner cavity 202, and the first tapered portion 303 and the second tapered portion 403 are both tapered, while the maximum outer diameter of the first core 300 and the second core 400 are Slightly larger than the inner diameter of the tube body 10, when the first core 300 and the second core 400 are inserted into the tube body 10, the tube body 10 and the inner wall of the end portion of the inner chamber 202 are more closely fitted, thereby making the airbag 20 and the tube body 10 Closely integrated, there is no transition between the two.

Since both the diameter of the second end portion 305 and the diameter of the fourth end portion 405 are smaller than the inner diameter of the pipe body 10, both the first core 300 and the second core 400 are easily inserted into the pipe body 10.

In the present embodiment, the taper of the first tapered portion 303 and the second tapered portion 403 are identical.

In the present embodiment, the length of the third end portion 401 is smaller than the length of the receiving groove 302, so that when the tube body 10 does not closely fit the two end portions of the inner cavity 202, the third end portion 401 can be inserted deeper into the receiving portion. The groove 302, that is, the closeness of the tube body 10 and the end portions of the inner cavity 202, can be adjusted by the depth of the third end portion 401 inserted into the receiving groove 302.

The first core 300 or/and the second core 400 are curved, and the curvature of the first core 300 or/and the second core 400 is curved in conformity with the curvature of the finished tubular body 10. Since the first core 300 or/and the second core 400 are bent, after heating, the tube 10 is bent as the first core 300 or the second core 400 is bent, and the bending curvature of the tube 10 is the same as that of the first core 300 or the second core 400. The bending curvature of the one core 300 or the second core 400 is uniform, thereby reducing the step of bending the tube 10 alone, reducing the generation cost.

Referring to FIG. 2 to FIG. 9 , a method for manufacturing an endotracheal tube provided by a second embodiment of the present invention, a method for manufacturing an endotracheal tube of a second embodiment is similar to the method for manufacturing an endotracheal tube of the first embodiment, and Can achieve the same technical effect. The tracheal intubation manufacturing method of the second embodiment includes the following steps: in step 301, an integral mold 200 for manufacturing the airbag 20 is manufactured, the mold 200 is provided with a cavity 202; and in step 302, the PVC slurry is poured Mold 200; in step 303, the PVC slurry is poured out to retain the PVC slurry remaining on the inner wall of the mold 200; in step 304, the guiding tube 500 passes through the mold 200; in step 305, the tube 10 is placed in the guiding tube 500 and pass through the mold 200; in step 306, the guiding tube 500 is withdrawn; in step 307, the first core 300 and the second core 400 are respectively inserted into the tube body 10 to be connected, so that the tube body 10 and the inner chamber 202 are The end inner wall is fitted; in step 308, the mold 200 is rotated and heated; in step 309, the gas in the air bag 20 is removed and demolded; wherein the docking position of the first core 300 and the second core 400 is in the inner cavity 202 Central.

In the second embodiment, the guide tube 500 is a solid cylinder with an outer diameter smaller than the inner diameter of the tube body 10 for guiding the tube body 10 through the mold 200. In use, one end of the guiding tube 500 is inserted into the tube body 10 until the tube body 10 is completely fitted to the guiding tube 500, and the guiding tube 500 is dragged until the tube body 10 passes through the mold 200, and then the guiding tube is withdrawn from the tube body 10. 500.

In other embodiments, the guide tube 500 is a hollow cylinder.

Since the tube body 10 in the second embodiment passes through the mold 200 through the guiding tube 500, the tube body 10 does not easily touch the inner wall of the mold 200 during the passage of the tube body 10 through the mold 200, thereby preventing the tube body 10 from being touched. Touching the inner wall of the mold 200 causes the loss of the PVC slurry and eventually leads to the formation of the broken air bag 20, further ensuring the uniformity of the wall thickness of the air bag 20.

In other embodiments, cooling the mold 200 is also included prior to step 309.

Referring to FIG. 9 , the present invention also provides an endotracheal tube 100 prepared by the above method. The tracheal intubation of the present invention comprises a tube 10 , an air bag 20 , an inflation tube 30 and an indicator balloon 40 . The insertion end 12 of the tubular body 10 indicates that the ball airbag 40 is located at one end of the inflation tube 30, and the other end of the inflation tube 30 is connected to the tubular body 10. The airbag 20 manufactured by the above method of the present invention has not only the outer surface without the mold clamping line, but also the airbag 20 has a uniform wall thickness, and the two end portions of the airbag 20 have no step, and at the same time, there is no transition at the joint of the airbag 20 and the tubular body 10, Thereby, the patient's discomfort caused by the mold clamping line and the end step of the outer surface of the airbag 20 is prevented during use, and damage to the patient's air tube is prevented.

The above is a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It is the scope of protection of the present invention.

Claims (14)

A method for manufacturing an endotracheal tube, characterized in that the method for manufacturing an endotracheal tube comprises: Manufacturing an integral mold for forming an air bag, the mold having an inner cavity; Pour the PVC slurry into the mold; Pour out the PVC slurry and retain the PVC slurry remaining on the inner wall of the mold; The tube body passes through the mold; The first core and the second core are respectively inserted into the tube body and connected to each other, so that the tube body and the inner wall of the end portion of the inner cavity are fitted; Rotating the mold and heating; and Excluding gas from the bladder and demoulding; Wherein the docking position of the first core and the second core is in the middle of the inner cavity. A method for manufacturing an endotracheal tube, characterized in that the method for manufacturing an endotracheal tube comprises: Manufacturing an integral mold for forming an air bag, the mold having an inner cavity; Pour the PVC slurry into the mold; Pour out the PVC slurry and retain the PVC slurry remaining on the inner wall of the mold; The guiding tube passes through the mold; The tube body is set on the guiding tube and passes through the mold; Pull out the guiding tube; The first core and the second core are respectively inserted into the tube body and connected to each other, so that the tube body and the inner wall of the end portion of the inner cavity are fitted; Rotating the mold and heating; and Excluding gas from the bladder and demoulding; Wherein the docking position of the first core and the second core is in the middle of the inner cavity. The method of manufacturing an endotracheal tube according to claim 1 or 2, further comprising cooling the mold before the step of removing the gas in the air bag and releasing the mold. The method of manufacturing an endotracheal tube according to any one of claims 1 to 3, wherein the maximum inner diameter of the first core and the second core is slightly larger than the inner diameter of the tubular body. The method of manufacturing an endotracheal tube according to claim 4, wherein the first core comprises a first end portion, a first tapered portion, a first support portion and a second end portion, and the first tapered portion is tapered. The diameter of the first tapered portion is increased from the first end portion to the first support portion, and the first end portion is provided with a receiving groove. The method of manufacturing an endotracheal tube according to claim 5, wherein the second core comprises a third end portion, a second tapered portion, a second supporting portion and a fourth end portion, the second tapered portion is tapered, and the second portion The diameter of the tapered portion is increased from the third end portion to the second support portion, and the third end portion is received in the receiving groove. The method of manufacturing an endotracheal tube according to claim 6, wherein the first support portion and the second support portion have the same diameter and the largest diameter, and the diameter of the second end portion and the maximum diameter of the first tapered portion are smaller than the first The diameter of the support portion, the diameter of the fourth end portion and the maximum diameter of the second tapered portion are both smaller than the diameter of the second support portion. The method of manufacturing an endotracheal tube according to claim 6, wherein the cross section of the third end portion is the same as the cross section of the receiving groove and is polygonal. The method of manufacturing an endotracheal tube according to claim 6, wherein the third end portion has a cylindrical shape with a plurality of ribs on the outer surface, and the receiving groove has a circular cross section and the inner wall of the receiving groove is provided with a plurality of holes. The groove for receiving the ribs. The method of manufacturing an endotracheal tube according to claim 6, wherein the diameters of the second end portion and the fourth end portion are both smaller than the diameter of the tubular body. The method of manufacturing an endotracheal tube according to any one of claims 1 to 10, wherein the first core or the second core is curved, and the curvature of the first core or the second core is curved in conformity with the curvature of the tubular body. The method of manufacturing an endotracheal tube according to any one of claims 1 to 11, wherein the shape of the inner cavity coincides with the outer shape of the air bag and a passage through which the tube body passes is provided. The method of manufacturing an endotracheal tube according to any one of claims 1 to 12, wherein the temperature at which the mold is heated is a temperature at which the PVC matures. An endotracheal tube, characterized in that the endotracheal tube is made by the method of manufacturing an endotracheal tube according to any one of claims 1 to 13.

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