CN105125164B - Bronchoscopic main flexible tube device - Google Patents
Bronchoscopic main flexible tube device Download PDFInfo
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- CN105125164B CN105125164B CN201510495096.8A CN201510495096A CN105125164B CN 105125164 B CN105125164 B CN 105125164B CN 201510495096 A CN201510495096 A CN 201510495096A CN 105125164 B CN105125164 B CN 105125164B
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- bourdon tube
- pars intermedia
- connecting portion
- braiding webmaster
- bronchoscopic
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Abstract
A kind of bronchoscopic main flexible tube device, is constituted body by braiding webmaster and bourdon tube, and body includes front connecting portion, pars intermedia and rear connecting portion；The periphery of the braiding webmaster of pars intermedia is coated with medical polyurethane layer, and the bourdon tube of pars intermedia includes leading portion, stage casing and the back segment being integrated mutually, pitch P1、P2And P3It is respectively 1.5 ~ 2.4mm, 2.4 ~ 2.8mm and 2.8 ~ 3.2mm, P1＜ P2＜ P3, the shore hardness A of medical polyurethane layer1、A2And A3It is respectively 30 ~ 40,40 ~ 55 and 60 ~ 80；The steel band wall thickness d of bourdon tube is 0.06 ~ 0.15mm, and width of steel band W is 1.8 ~ 2.3mm；The length of leading portion, stage casing and back segment is respectively 170 ± 70mm, 210 ± 70mm and 190 ± 70mm.The present invention has at least three sections of different pliabilitys, good bending property, it is simple to insert, and does not easily cause patient's damage.
Description
Technical field
The present invention relates to a kind of main flexible tube device, be specifically related to the bronchoscopic main flexible tube device of a kind of medicinal soft.
Background technology
The main flexible tube device of medicinal soft bronchial endoscope, is one of main accessory important in medical endoscope.
Doctor's bronchial endoscope, when carrying out checking diagnosis to patient's bending, complicated upper respiratory tract, inserts the difficulty of flexible pipe relatively
Greatly.The front end of bronchoscope insertion section is CCD camera assembly, and the main flexible tube device of its insertion section will be through nasal meatus (or oral cavity), nose
Pharyngeal, pars oralis pharyngis, epiglottis portion, throat enter trachea and left and right bronchus.During intubating, the main flexible tube device of scope is curved
Bent angle is greater than 90 °, so, should guarantee not injured patient's upper respiratory tract and bronchial inwall, ensure again accurately
Check diagnosis, so the manufacturing and designing of main flexible tube to bronchus scope has higher requirement.
The pliability of whole flexible pipe of existing bronchoscopic main flexible tube device is the same, and some main flexible tube devices are soft
Softness is really up to the mark, and i.e. the shore hardness A of the layer of polyurethane of main flexible tube device periphery cladding is more than 80, and some softnesses are spent soft, the most main
The shore hardness A of the layer of polyurethane of hose arrangement periphery cladding less than 30, accordingly, because the pliability of main flexible tube device is really up to the mark or
Too soft, doctor, when using the diagnosis of soft bronchial endoscope, arises that the situation of difficult intubation, certainly, the most also has one
A little reasons are that the properity of the main flexible tube device of scope does not reaches use requirement yet；The most bronchoscopic main flexible tube device
Pliability really up to the mark time, insert during will cause local hemorrhage, local mucous membrane damage or complication.If it is main soft
The pliability of pipe device is too soft, also there will be difficult intubation, even has and insert less than defects such as the positions needing diagnosis.
Summary of the invention
It is an object of the invention to: provide one to have at least three sections of different pliabilitys, good bending property, and facilitate insertion into,
And do not easily cause the bronchoscopic main flexible tube device that patient's enteric cavity damages, to overcome the deficiencies in the prior art.
In order to achieve the above object, the technical scheme is that a kind of bronchoscopic main flexible tube device, there is this
Body, described body be by braiding webmaster and be inserted into braiding webmaster in bourdon tube constitute, described body includes front connection
Portion, pars intermedia and rear connecting portion, and the braiding webmaster of the front connecting portion of body is welded to connect with bourdon tube, the rear connecting portion of body
Braiding webmaster be welded to connect with bourdon tube；The periphery of the braiding webmaster of the pars intermedia of described body is coated with medical polyurethane
Layer, the periphery of described medical polyurethane layer is coated with medical transparent polyurethane film, the maximum outside diameter Φ of the pars intermedia of described body
It is 3 ~ 6mm；Its innovative point is:
A, the bourdon tube of described pars intermedia include leading portion, stage casing and the back segment being integrated mutually；
B, the pitch P of leading portion of bourdon tube of described pars intermedia1For 1.5mm ~ 2.4mm；The pitch P in stage casing2For 2.4.mm ~
2.8mm；The pitch P of back segment3For 2.8mm ~ 3.2mm, and P1＜ P2＜ P3；
C, described pars intermedia the shore of medical polyurethane layer of periphery cladding of braiding webmaster of leading portion of bourdon tube hard
Degree A1It is 30 ~ 40, the shore hardness A of the medical polyurethane layer of the periphery cladding of the braiding webmaster in stage casing2It is 40 ~ 55, back segment
The shore hardness A of the medical polyurethane layer of the periphery cladding of braiding webmaster3It is 60 ~ 80；
D, the steel band wall thickness d of described bourdon tube are 0.06 ~ 0.15mm, and the width of steel band W of bourdon tube is 1.8 ~ 2.3mm；
E, length L of leading portion of bourdon tube of described pars intermedia2-1It is 170 ± 70mm, length L in stage casing2-2Be 210 ±
70mm, length L of back segment2-3It is 190 ± 70mm.
In technique scheme, the total length L of described body is 505 ± 20mm～650 ± 20mm, the length of front connecting portion
Degree is L1For 2mm ~ 5mm, length L of pars intermedia2Be 500 ± 20mm～640 ± 20mm, length L of rear connecting portion3For 3mm ~
5mm。
In technique scheme, described braiding webmaster is formed by 32 ~ 36 bundle braided steel wires, and every Shu Gangsi be by
5～7 steel wires are merged into a branch of.
In technique scheme, the external diameter Φ 1 of described braiding webmaster is 2.7～5.7mm, the braiding angle beta of braiding webmaster
Being 35 °～45 °, cross point pitch H of braiding webmaster is 0.6～1.3mm.
In technique scheme, the pipe thickness of described medical polyurethane layer is 0.1 ~ 0.3mm.
In technique scheme, the pitch P of the bourdon tube of described front connecting portion0For 1.5mm ~ 2.4mm；Rear connecting portion
The pitch P of bourdon tube4For 2.8mm ~ 3.2mm, and P0≤P1 , P3≤P4。
The good effect that the present invention is had is: after using the main flexible tube device of the present invention, during use, connect before body
The portion that connects is fixing with the bent angle device of bronchoscope front end to be connected, and rear connecting portion is fixing with manipulator's shank to be connected；In described
Between the bourdon tube in portion include the leading portion, stage casing and the back segment that are integrated mutually；The pitch P of the leading portion of the bourdon tube of described pars intermedia1For
1.5mm~2.4mm；The pitch P in stage casing2For 2.4.mm ~ 2.8mm；The pitch P of back segment3For 2.8mm ~ 3.2mm, and P1＜ P2＜ P3；
The shore hardness A of the medical polyurethane layer of the periphery cladding of the braiding webmaster of the leading portion of the bourdon tube of described pars intermedia1Be 30 ~
40, the shore hardness A of the medical polyurethane layer of the periphery cladding of the braiding webmaster in stage casing2It is 40 ~ 55, the braiding webmaster of back segment
The shore hardness A of medical polyurethane layer of periphery cladding3It is 60 ~ 80；The steel band wall thickness d of described bourdon tube is 0.06 ~
0.15mm, the width of steel band W of bourdon tube are 1.8 ~ 2.3mm；Length L of the leading portion of the bourdon tube of described pars intermedia2-1Be 170 ±
70mm, length L in stage casing2-2It is 210 ± 70mm, length L of back segment2-3It is 190 ± 70mm；So, the centre of main flexible tube device
The bourdon tube in portion and the pliability of medical polyurethane layer are just divided into three sections, and the pliability of leading portion, stage casing and back segment is successively decreased successively,
Therefore, in doctor's in-service, due to the leading portion of bourdon tube of pars intermedia and corresponding medical polyurethane layer pliability relatively
Height, so would not cause damage during inserting, and along with deepening continuously of main flexible tube device, and is easy to doctor behaviour
Make, reduce stage casing and the pliability of corresponding medical polyurethane layer of the bourdon tube of pars intermedia, finally for the ease of main flexible tube
Device can be smoothly through the nasal meatus (or oral cavity) of patient, nasopharynx part, pars oralis pharyngis, epiglottis portion, throat's entrance trachea and left and right
Bronchus, therefore, what doctor needed in operation increases suitable dynamics, meanwhile, also for facilitating insertion into, thus middle
The pliability of the back segment of the bourdon tube in portion and corresponding medical polyurethane layer is than the stage casing of the bourdon tube of pars intermedia and corresponding
The pliability of medical polyurethane layer is also low.Owing to the present invention has at least three sections of different pliabilitys, good bending property, and it is easy to
Insert, just meet doctor during one man operation bronchoscope, it becomes possible to be delivered to bronchoscope like clockwork soft
The front end of pipe, indiscriminately ad. as one wishes carries out operating the position passing through upper respiratory tract, it is ensured that doctor observes upper respiratory tract intracavity
Each position, and its smooth external diameter surface, it is ensured that upper respiratory tract and inwall thereof during endoscopy diagnoses not
It is damaged.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of detailed description of the invention of the present invention；
Fig. 2 is the complete section schematic diagram of Fig. 1；
Fig. 3 is the A-A section view enlarged diagram of Fig. 2；
Fig. 4 is the structural representation weaving webmaster in Fig. 2；
Fig. 5 is the B-B cross-sectional schematic weaving webmaster in Fig. 4；
Fig. 6 is the structural representation of bourdon tube in Fig. 2.
Detailed description of the invention
Below in conjunction with accompanying drawing and the embodiment that is given, the present invention is further illustrated, but is not limited thereto.
As shown in Fig. 1,2,3,4,5,6, a kind of bronchoscopic main flexible tube device, there is body 1, described body 1 be by
Braiding webmaster 2 and the bourdon tube 3 being inserted in braiding webmaster 2 are constituted, and described body 1 includes front connecting portion 1-1, pars intermedia
1-2 and rear connecting portion 1-3, and the braiding webmaster 2 of the front connecting portion 1-1 of body 1 is welded to connect by scolding tin with bourdon tube 3, body 1
The braiding webmaster 2 of rear connecting portion 1-3 be welded to connect by scolding tin with bourdon tube 3；The mesh grid of the pars intermedia 1-2 of described body 1
The periphery of pipe 2 is coated with medical polyurethane layer 4, and the periphery of described medical polyurethane layer 4 is coated with medical transparent polyurethane film 5,
The maximum outside diameter Φ of the pars intermedia 1-2 of described body 1 is 3 ~ 6mm；
The bourdon tube 3 of described pars intermedia 1-2 includes leading portion 3-1, stage casing 3-2 and the back segment 3-3 being integrated mutually；
The pitch P of the leading portion 3-1 of the bourdon tube 3 of described pars intermedia 1-21For 1.5mm ~ 2.4mm；The pitch P of stage casing 3-22For
2.4.mm~2.8mm；The pitch P of back segment 3-33For 2.8mm ~ 3.2mm, and P1＜ P2＜ P3；
The medical polyurethane layer 4 of the periphery cladding of the braiding webmaster 2 of the leading portion 3-1 of the bourdon tube 3 of described pars intermedia 1-2
Shore hardness A1It is 30 ~ 40, the shore hardness A of the medical polyurethane layer 4 of the periphery cladding of the braiding webmaster 2 of stage casing 3-22Be 40 ~
The shore hardness A of the medical polyurethane layer 4 of the periphery cladding of the braiding webmaster 2 of 55, back segment 3-33It is 60 ~ 80；
The steel band wall thickness d of described bourdon tube 3 is 0.06 ~ 0.15mm, and the width of steel band W of bourdon tube 3 is 1.8 ~ 2.3mm；
Length L of the leading portion 3-1 of the bourdon tube 3 of described pars intermedia 1-22-1It is 170 ± 70mm, length L of stage casing 3-22-2
It is 210 ± 70mm, length L of back segment 3-32-3It is 190 ± 70mm.
Bourdon tube 3 of the present invention is spiral bourdon tube.
As shown in Figure 1, 2, so that present configuration is more reasonable, the total length L of described body 1 is 505 ± 20mm
～650 ± 20mm, a length of L of front connecting portion 1-11For 2mm ~ 5mm, length L of pars intermedia 1-22Be 500 ± 20mm～640 ±
20mm, length L of rear connecting portion 1-33For 3mm ~ 5mm.
Braiding webmaster 2 of the present invention is formed by 32 ~ 36 bundle braided steel wires, and every Shu Gangsi is by 5～7 steel wires
Merge into a branch of.
Such as Fig. 3, shown in 5, the external diameter Φ 1 of described braiding webmaster 2 is 2.7～5.7mm, and the braiding angle beta of braiding webmaster 2 is
35 °～45 °, cross point pitch H of braiding webmaster 2 is 0.6～1.3mm.Wherein, the cross point of braiding webmaster 2 of the present invention
Pitch H, also referred to as lay of braiding H.
The pipe thickness of medical polyurethane layer 4 of the present invention is 0.1 ~ 0.3mm.
As shown in Figure 2,6, the pitch P of the bourdon tube 3 of described front connecting portion 1-10For 1.5mm ~ 2.4mm；Rear connecting portion 1-3
The pitch P of bourdon tube 34For 2.8mm ~ 3.2mm, and P0≤P1 , P3≤P4.Wherein, the bourdon tube 3 of described front connecting portion 1-1
Pitch P0Pitch P with the leading portion 3-1 of the bourdon tube 3 of pars intermedia 1-21Equal, the pitch P of rear connecting portion 1-34With pars intermedia
The pitch P of the back segment 3-3 of the bourdon tube 3 of 1-23Equal.
The braiding webmaster 2 of the front connecting portion 1-1 of described body 1 and bourdon tube 3 can also be by other the soldering sides such as silver soldering
Method is welded to connect, and the braiding webmaster 2 of the rear connecting portion 1-3 of body 1 and bourdon tube 3 can also be by other the method for welding such as silver soldering
It is welded to connect.
As it is shown in figure 1, know that main flexible tube device is inserted into the particular location of patient bore, in the present invention for the ease of doctor
Between the outer surface of medical polyurethane layer 4 of portion 1-2 be provided with length mark 1-4.
The bronchoscopic main flexible tube device of following specific embodiment 1, embodiment 2, embodiment 3 is can get by table 1:
Table 1,
When the present invention uses, it is connected fixing with the bent angle device of bronchoscope front end for the front connecting portion 1-1 of body 1, after
Connecting portion 1-3 is fixing with manipulator's shank to be connected；Owing to the bourdon tube 3 of described pars intermedia 1-2 includes the leading portion 3-that is integrated mutually
1, stage casing 3-2 and back segment 3-3；The pitch P of the leading portion 3-1 of the bourdon tube 3 of described pars intermedia 1-21For 1.5mm ~ 2.4mm；Stage casing
The pitch P of 3-22For 2.4.mm ~ 2.8mm；The pitch P of back segment 3-33For 2.8mm ~ 3.2mm, and P1＜ P2＜ P3；Described pars intermedia
The shore hardness A of the medical polyurethane layer 4 of the periphery cladding of the braiding webmaster 2 of the leading portion 3-1 of the bourdon tube 3 of 1-21It is 30 ~ 40,
The shore hardness A of the medical polyurethane layer 4 of the periphery cladding of the braiding webmaster 2 of stage casing 3-22It is 40 ~ 55, the braiding of back segment 3-3
The shore hardness A of the medical polyurethane layer 4 of the periphery cladding of webmaster 23It is 60 ~ 80；The steel band wall thickness d of described bourdon tube 3 is
0.06 ~ 0.15mm, the width of steel band W of bourdon tube 3 are 1.8 ~ 2.3mm；The length of the leading portion 3-1 of the bourdon tube 3 of described pars intermedia 1-2
Degree L2-1It is 170 ± 70mm, length L of stage casing 3-22-2It is 210 ± 70mm, length L of back segment 3-32-3It is 190 ± 70mm；This
Sample, the bourdon tube 3 of the pars intermedia 1-2 of main flexible tube device and the pliability of medical polyurethane layer 4 are just divided into three sections, and leading portion 3-1,
The pliability of stage casing 3-2 and back segment 3-3 is successively decreased successively, therefore, when doctor operates, due to the leading portion of the bourdon tube 3 of pars intermedia 1-2
The pliability of 3-1 and corresponding medical polyurethane layer 4 is higher, so would not cause damage, along with master during inserting
Deepening continuously of hose arrangement, and it is easy to doctor's operation, reduce stage casing 3-2 and the correspondence of the bourdon tube 3 of pars intermedia 1-2
The pliability of medical polyurethane layer 4, is finally smoothly through the nasal meatus (or oral cavity) of patient, nasopharynx for the ease of main flexible tube device
Portion, pars oralis pharyngis, epiglottis portion, throat enter trachea and bronchial position, left and right, and therefore, doctor needs to increase in operation
Add certain dynamics, meanwhile, also for facilitating insertion into, thus the back segment 3-3 of the bourdon tube 3 of pars intermedia 1-2 and corresponding medical
The stage casing 3-2 of the pliability of layer of polyurethane 4 bourdon tube 3 than pars intermedia 1-2 and the pliability of corresponding medical polyurethane layer 4
Also low.Owing to the present invention has at least three sections of different pliabilitys, good bending property, and facilitate insertion into, just meet doctor and exist
During one man operation bronchoscope, it becomes possible to be delivered to the front end of bronchoscope flexible pipe like clockwork, indiscriminately ad. as one wishes
Carry out operating the position passing through upper respiratory tract, it is ensured that doctor observes each position of upper respiratory tract intracavity, Er Qieqi
Smooth external diameter surface, it is ensured that upper respiratory tract and inwall thereof are not damaged during endoscopy diagnoses.
Claims (6)
1. a bronchoscopic main flexible tube device, has body (1), and described body (1) is by braiding webmaster (2) and plug-in mounting
Bourdon tube (3) in braiding webmaster (2) is constituted, described body (1) include front connecting portion (1-1), pars intermedia (1-2) and after
Connecting portion (1-3), and the braiding webmaster (2) of the front connecting portion (1-1) of body (1) is welded to connect with bourdon tube (3), body (1)
The braiding webmaster (2) of rear connecting portion (1-3) be welded to connect with bourdon tube (3)；The volume of the pars intermedia (1-2) of described body (1)
The periphery of knitmesh pipe (2) is coated with medical polyurethane layer (4), and the periphery of described medical polyurethane layer (4) is coated with medical transparent
Polyurethane film (5), the maximum outside diameter Φ of the pars intermedia (1-2) of described body (1) is 3 ~ 6mm；It is characterized in that:
A, the bourdon tube (3) of described pars intermedia (1-2) include leading portion (3-1), stage casing (3-2) and the back segment (3-3) being integrated mutually；
B, the pitch P of leading portion (3-1) of bourdon tube (3) of described pars intermedia (1-2)1For 1.5mm ~ 2.4mm；The spiral shell in stage casing (3-2)
Away from P2For 2.4.mm ~ 2.8mm；The pitch P of back segment (3-3)3For 2.8mm ~ 3.2mm, and P1＜ P2＜ P3；
C, described pars intermedia (1-2) bourdon tube (3) leading portion (3-1) braiding webmaster (2) periphery cladding medical poly-ammonia
The shore hardness A of ester layer (4)1It is 30 ~ 40, the medical polyurethane layer (4) of the periphery cladding of the braiding webmaster (2) of stage casing (3-2)
Shore hardness A2It is 40 ~ 55, the shore of the medical polyurethane layer (4) of the periphery cladding of the braiding webmaster (2) of back segment (3-3)
Hardness A3It is 60 ~ 80；
D, the steel band wall thickness d of described bourdon tube (3) are 0.06 ~ 0.15mm, and the width of steel band W of bourdon tube (3) is 1.8 ~ 2.3mm；
E, length L of leading portion (3-1) of bourdon tube (3) of described pars intermedia (1-2)2-1It is 170 ± 70mm, the length of stage casing (3-2)
Degree L2-2It is 210 ± 70mm, length L of back segment (3-3)2-3It is 190 ± 70mm.
Bronchoscopic main flexible tube device the most according to claim 1, it is characterised in that: the total length L of described body (1)
It is 505 ± 20mm～650 ± 20mm, a length of L of front connecting portion (1-1)1For 2mm ~ 5mm, length L of pars intermedia (1-2)2For
500 ± 20mm～640 ± 20mm, length L of rear connecting portion (1-3)3For 3mm ~ 5mm.
Bronchoscopic main flexible tube device the most according to claim 1, it is characterised in that: described braiding webmaster (2) be by
32 ~ 36 bundle braided steel wires, and often Shu Gangsi is merged into a branch of by 5～7 steel wires.
Bronchoscopic main flexible tube device the most according to claim 1, it is characterised in that: outside described braiding webmaster (2)
Footpath Φ 1 is 2.7～5.7mm, and the braiding angle beta of braiding webmaster (2) is 35 °～45 °, and cross point pitch H of braiding webmaster (2) is
0.6～1.3mm.
Bronchoscopic main flexible tube device the most according to claim 1, it is characterised in that: described medical polyurethane layer (4)
Pipe thickness be 0.1 ~ 0.3mm.
Bronchoscopic main flexible tube device the most according to claim 1, it is characterised in that: described front connecting portion (1-1)
The pitch P of bourdon tube (3)0For 1.5mm ~ 2.4mm；The pitch P of the bourdon tube (3) of rear connecting portion (1-3)4For 2.8mm ~ 3.2mm,
And P0≤P1 , P3≤P4。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510495096.8A CN105125164B (en) | 2015-08-13 | 2015-08-13 | Bronchoscopic main flexible tube device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510495096.8A CN105125164B (en) | 2015-08-13 | 2015-08-13 | Bronchoscopic main flexible tube device |
Publications (2)
| Publication Number | Publication Date |
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| CN105125164A CN105125164A (en) | 2015-12-09 |
| CN105125164B true CN105125164B (en) | 2016-08-17 |
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| CN201510495096.8A Active CN105125164B (en) | 2015-08-13 | 2015-08-13 | Bronchoscopic main flexible tube device |
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| CN (1) | CN105125164B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110584583B (en) * | 2019-08-30 | 2024-07-12 | 常州延顺光电科技有限公司 | Ureteroscope's insertion tube assembly |
| CN110420007B (en) * | 2019-08-30 | 2024-07-19 | 常州延顺光电科技有限公司 | Insertion tube assembly for colonoscope |
| CN116211218A (en) * | 2022-12-21 | 2023-06-06 | 浙江优亿医疗器械股份有限公司 | Improved visualizer |
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| US5788714A (en) * | 1995-08-14 | 1998-08-04 | Asahi Kogaku Kogyo Kabushiki Kaisha | Flexible tube for an endoscope |
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| JP3641381B2 (en) * | 1999-03-10 | 2005-04-20 | テルモ株式会社 | Medical tube and manufacturing method thereof |
| US20050165275A1 (en) * | 2004-01-22 | 2005-07-28 | Kenneth Von Felten | Inspection device insertion tube |
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| US20090030400A1 (en) * | 2007-07-25 | 2009-01-29 | Arani Bose | System and method for intracranial access |
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|---|---|---|---|---|
| US5788714A (en) * | 1995-08-14 | 1998-08-04 | Asahi Kogaku Kogyo Kabushiki Kaisha | Flexible tube for an endoscope |
| CN201324227Y (en) * | 2008-12-15 | 2009-10-14 | 金卫忠 | Bronchoscope flexible pipe |
| CN102958418A (en) * | 2010-06-25 | 2013-03-06 | 奥林巴斯株式会社 | Flexible tubing portion of endoscope and endoscope having the flexible tubing portion |
| CN103431829A (en) * | 2013-08-20 | 2013-12-11 | 姜泊 | Bending controlling mechanism of medical endoscope |
| CN103623494A (en) * | 2013-12-12 | 2014-03-12 | 西北有色金属研究院 | Titanium alloy guide wire for surgical interventional therapy |
| CN204971189U (en) * | 2015-08-13 | 2016-01-20 | 常州延顺光电科技有限公司 | Bronchoscope's main hose fittings |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105125164A (en) | 2015-12-09 |
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