JP4317416B2 - 呼吸回路用枝管 - Google Patents
呼吸回路用枝管 Download PDFInfo
- Publication number
- JP4317416B2 JP4317416B2 JP2003356995A JP2003356995A JP4317416B2 JP 4317416 B2 JP4317416 B2 JP 4317416B2 JP 2003356995 A JP2003356995 A JP 2003356995A JP 2003356995 A JP2003356995 A JP 2003356995A JP 4317416 B2 JP4317416 B2 JP 4317416B2
- Authority
- JP
- Japan
- Prior art keywords
- conduit
- respiratory
- branch pipe
- connector
- reinforcing member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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Images
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
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Description
本出願人の先行する特許出願であるAU43823/01で教示されているように、薄いメンブレン壁が、通気性メンブレン用途に特に用いられ、この場合、水蒸気がメンブレンを透過することは望ましいが、液体としての水がこれを通過するのは望ましくない。
極薄肉導管の別の欠点は、導管の壁を構成する非常に薄いメンブレンの耐久性が低いことである。非常に薄いメンブレンは、尖った物体で穴があけられ易く且つ(或いは)引張力に起因する塑性変形を生じやすいことがある。
本発明の目的は、上記に関する少なくとも幾分かの改良策となり又は少なくとも一般大衆及び医療専門家に有効な選択肢を与える呼吸回路用枝管を提供することにある。
呼吸回路用枝管であって、
第1の端部と、第2の端部と、これらの間に位置する呼吸用ガス経路とを備えた極薄肉の導管と、
前記導管の壁が、壁厚50μm未満の極薄膜であり、該膜は自立するには十分に丈夫ではなく、
該導管が、患者の呼吸による前記導管内の圧力変動で前記壁が変形した結果、実質的な容積変化がおこるように、十分に丈夫ではなく、
前記導管の前記第1の端部に固定された第1のコネクタと、
前記導管の前記第2の端部に固定された第2のコネクタと、
前記導管の一端部から前記導管の他端部まで非蛇行経路に沿って前記極薄肉導管内に自由な状態で設けられ、前記第1のコネクタ及び前記第2のコネクタに接続された細長い補強部材と、を有し、
前記補強部材が、該補強部材が無かった場合に前記導管に生じる実質的な容積変化が起こらないように前記導管を補強し、
前記細長い補強部材は、その外周部から測定した断面積が、前記呼吸用導管のボアの断面積の10%より小さい、
ことを特徴とする呼吸回路用枝管を提供する。
図1を参照すると、呼吸回路用枝管の壁の断面が示されており、この例では、導管の可撓性壁は、非常に薄いフィルム状のプラスチックメンブレンから作られていて、隣り合うターンすなわち巻回部の縁部が補強用ビードで互いに溶接された状態で螺旋に巻かれている。予備成形され又はオンラインで押し出しされたテープとして供給された非常に薄いフィルム40は、テープの隣り合う縁部41,42が互いにオーバーラップした状態でフォーマに螺旋に巻き付けられる。次に、溶融状態で提供される螺旋支持リブ43を隣り合うターン相互間のオーバーラップ部の頂部に載せられる。螺旋支持リブは2つの隣り合うストリップとリブを互いに熱的且つ機械的に接合し、それにより、冷えると可撓性の弾性導管が形成される。このようにして得られた製品は、軽量且つ可撓性の単一壁の呼吸用導管である。かかる方法により形成される導管の別の実施形態、例えば、多数の壁を持つ導管を、上述の成形工程に別のステージを加えることにより形成できる。
図2に記載した実施形態としての二重壁型呼吸用管製品を製造するのに適した装置を構成する一例が、図3に示されている。この装置は、好ましくは複数の回転ロッドが中央支持ロッドの周りに配置された公知タイプのフォーマ1を有する。これらロッドは、機械支持部2内に設けられた歯車箱から延びていて、これによって回転する。少なくとも管成形領域内では、回転ロッドは、螺旋経路を辿る。支持ロッドに対するこれら回転ロッドのピッチ角は、成形中の管のピッチ角を制御する。かかる機械の一例は、イタリア国のOLMAS SRL から入手できる螺旋パイプラインマンドレルである。フォーマで成形中の管を、回転ロッドの運動により回転させながら矢印3の方向に前進させる。フォーマの前進速度は、フォーマ1上へのストリップ又はテープの螺旋巻きのピッチがストリップの幅よりも僅かに小さくて、隣り合うターンが僅かにオーバーラップするように回転速度に対して選択されている。第1の押出し機4が、通気性ポリマー材料の非常に薄いテープ5を押し出す。テープ5は、フォーマ1の作用により螺旋の状態でフォーマ1上に付着する。テープ5の螺旋付着ピッチは、テープ5の幅よりも僅かに小さい。テープ5の螺旋付着により、導管の内側通気性壁6が形成される。第2の押出し機7が、ポリマー材料のビード8を押し出す。ビード8は、テープ5の隣り合うターン相互間の接合部又はオーバーラップ部を覆った状態でフォーマに付着し、それにより、この接合部に沿って隆起したビード9が形成され、テープ5のオーバーラップ状態のターンが互いに溶接される。第3の押出し機10が、通気性ポリマーの第2のテープ11を押し出す。通気性ポリマーの第2のテープ11は、フォーマ1上に付着されてこれがビード8の隣り合うターン相互間を橋渡しするようにする。テープ11の隣り合うターンは互いにオーバーラップし、それにより外側通気性シース12が形成される。第4の押出し機13が、第2の溶融状態のポリマービード14を押し出す。ビード14を第2のテープ11の隣り合うターン相互間のオーバーラップ部に沿って螺旋に被着させ、テープ11のオーバーラップ状態のターンを溶接する。溶融状態のビードの付着によるフィルムオーバーラップ部の接合に加えて、他の実効性のある融合法を利用するのがよい。
(a)導管壁又は壁の一部に通気性材料を利用すること、
(b)成形方法に余分の工程を加えることにより単一壁又は多数の壁を備える導管を形成できること(なお、壁相互間の空間の有無は問わない)、
(c)単一層又は多数の層から成る壁が得られること、
(d)成形時に極薄テープを押し出すことができること、又は、予備成形されてリールに巻回した状態でフォーマに供給できること、
(e)極薄テープを、極薄フィルム層及びこれ又水蒸気に対して透過性がある補強層を有する積層品として提供できること、
(f)成形方法が、第2の熱溶接方法を含むことができること、
(g)溶融状態のビードが、層相互間に介在できること、又は2以上の層の頂部上に被着できること、
(h)導管の直接押出し又は延伸、或いは吹込み成形ができること、
(i)導管を長手方向シームを備えた非常に薄いフィルムから成形すること、
(j)螺旋半径方向支持ビードではなく、一連の環状半径方向支持ビードを提供することである。
4,7,10,13,18,21 押出し機
5,11,19 テープ
6 通気性壁
8,14,22 ビード
12 通気性シース
20 導管壁
23 コネクタ
24 補強部材又は背骨材
25 導管
26 凹部
28 突起
29 カラー
30 隆起部分
35 ビード
40 非常に薄いフィルム
44 薄いフィルム層
Claims (18)
- 呼吸回路用枝管であって、
第1の端部と、第2の端部と、これらの間に位置する呼吸用ガス経路とを備えた極薄肉の導管と、
前記導管の壁が、壁厚50μm未満の極薄膜であり、該膜は自立するには十分に丈夫ではなく、
該導管が、患者の呼吸による前記導管内の圧力変動で前記壁が変形した結果、実質的な容積変化がおこるように、十分に丈夫ではなく、
前記導管の前記第1の端部に固定された第1のコネクタと、
前記導管の前記第2の端部に固定された第2のコネクタと、
前記導管の一端部から前記導管の他端部まで非蛇行経路に沿って前記極薄肉導管内に自由な状態で設けられ、前記第1のコネクタ及び前記第2のコネクタに接続された細長い補強部材と、を有し、
前記補強部材が、該補強部材が無かった場合に前記導管に生じる実質的な容積変化が起こらないように前記導管を補強し、
前記細長い補強部材は、その外周部から測定した断面積が、前記呼吸用導管のボアの断面積の10%より小さい、
ことを特徴とする呼吸回路用枝管。 - 前記細長い補強部材は中空であり、前記中空の細長い補強部材は各端部が、前記第1のコネクタ及び前記第2のコネクタによって行き止まり状態で終端している、
請求項1に記載の呼吸回路用枝管。 - 前記細長い補強部材は、中実でほぼ円形の断面を有し、前記細長い補強部材は、2つの端部を有している、
請求項1に記載の呼吸回路用枝管。 - 前記細長い補強部材は、正の温度係数の発熱体を含む、
請求項1ないし3の何れか1項に記載の呼吸回路用枝管。 - 前記細長い補強部材は、抵抗発熱体を含む、
請求項1ないし3の何れか1項に記載の呼吸回路用枝管。 - 前記細長い補強部材の長さは、前記導管の長さの100.5%ないし105%である、 請求項1ないし5の何れか1項に記載の呼吸回路用枝管。
- 前記導管は、螺旋リブを含み、
前記コネクタは、補助機器と連結するのに適した第1の端部と呼吸用導管と連結する第2の端部とを有し、
前記第1の端部と前記第2の端部との間には環状の肩が設けられ、
前記第2の端部は、軸線に沿って延び、ほぼ円形の断面を有し、
前記第2の端部は、外面に設けられ、呼吸用導管の前記螺旋リブとインターロック状態で係合する少なくとも1つの突起を有している、
請求項1ないし6の何れか1項に記載の呼吸回路用枝管。 - 前記突起は、前記呼吸用導管の前記螺旋リブとの係合に適したピッチを備える雄ねじである、
請求項7に記載の呼吸回路用枝管。 - 前記肩部分は、押出し軸線を備えた固定用カラーを受け入れる環状凹部を有している、 請求項7又は8に記載の呼吸回路用枝管。
- 前記端部コネクタの前記第2の端部は、前記軸線にほぼ平行に設けられ前記細長い補強部材を受け入れる凹部を有している、
請求項7ないし9の何れか1項に記載の呼吸回路用枝管。 - 前記固定用カラーは、前記押出し軸線にほぼ平行に設けられ前記細長い補強部材を受け入れる凹部を有している、
請求項9に記載の呼吸回路用枝管。 - 前記細長い補強部材は、弾性であり、使用中、前記枝管の通常の撓み及び曲げの作用を受けても塑性変形しない、
請求項1ないし11の何れか1項に記載の呼吸回路用枝管。 - 前記細長い補強部材の断面積は、3mm2ないし12.5mm2である、
請求項1ないし12の何れか1項に記載の呼吸回路用枝管。 - 前記細長い補強部材の最小曲げ剛性は、693Nmm2ないし11,096Nmm2である、
請求項1ないし13の1項に記載の呼吸回路用枝管。 - 前記導管を包囲し、第1の端部のところ及びその周りが前記第1のコネクタに固定され、その他端部のところ及びその周りが前記第2のコネクタに固定された編組シースを更に有している、
請求項1ないし14の何れか1項に記載の呼吸回路用枝管。 - 前記シースは、ポリエチレンテレフタレートモノフィラメントから編組された編組管である、
請求項15に記載の呼吸回路用枝管。 - 呼吸回路用枝管の製造方法であって、
第1の端部及び第2の端部を備えた極薄肉の呼吸用導管であって、前記壁は50μm未満の壁厚であり、前記壁が自立するには十分に丈夫ではなく、該導管が、患者の呼吸による前記導管内の圧力変動で前記壁が変形した結果、実質的な容積変化がおこるように、十分に丈夫ではない導管を準備する工程と、
第1の端部及び第2の端部を備えた細長い補強部材を、前記導管の一端部から前記導管の他端部まで非蛇行経路に沿って前記導管内に自由な状態で位置するよう配置する工程と、
第1の端部コネクタを前記呼吸用導管の第1の端部と前記細長い補強部材の第1の端部とに固定する工程と、
第2の端部コネクタを前記呼吸用導管の前記第2の端部と前記細長い補強部材の前記第2の端部とに固定する工程であって、前記補強部材が、該補強部材が無かった場合に前記導管に生じる実質的な容積変化が起こらないように前記導管を補強し、前記細長い補強部材は、その外周部から測定した断面積が、前記呼吸用導管のボアの断面積の10%より小さい工程と、を備えている、
ことを特徴とする方法。 - 第1の端部と第2の端部とを備えた補強用メッシュを前記呼吸用導管の外部に被せる工程と、
第1の端部コネクタを、前記呼吸用導管の第1の端部と前記補強用メッシュの第1の端部とに固定する工程と、
第2の端部コネクタを、前記呼吸用導管の前記第2の端部と前記補強用メッシュの前記第2の端部とに固定する工程と、を更に備えている、
請求項17記載の呼吸回路用枝管の製造方法。
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- 2003-09-03 US US10/653,821 patent/US7469719B2/en not_active Expired - Lifetime
- 2003-09-05 DE DE60302302T patent/DE60302302T2/de not_active Expired - Lifetime
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- 2003-09-08 TW TW092124733A patent/TWI237574B/zh not_active IP Right Cessation
- 2003-09-08 CA CA2439765A patent/CA2439765C/en not_active Expired - Lifetime
- 2003-09-08 SG SG200305658A patent/SG108937A1/en unknown
- 2003-09-09 BR BRPI0303478A patent/BRPI0303478B8/pt active IP Right Grant
- 2003-09-09 JP JP2003356995A patent/JP4317416B2/ja not_active Expired - Lifetime
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US11219733B2 (en) | 2022-01-11 |
AU2003244171B2 (en) | 2007-11-15 |
US10478583B2 (en) | 2019-11-19 |
CA2439765A1 (en) | 2004-03-09 |
JP2004275728A (ja) | 2004-10-07 |
EP1396276A3 (en) | 2004-05-19 |
US20170080175A1 (en) | 2017-03-23 |
US20090126817A1 (en) | 2009-05-21 |
BRPI0303478B8 (pt) | 2021-06-22 |
US20140373843A1 (en) | 2014-12-25 |
US20040079371A1 (en) | 2004-04-29 |
DE60302302T2 (de) | 2006-06-01 |
ATE309836T1 (de) | 2005-12-15 |
HK1059749A1 (en) | 2004-07-16 |
BR0303478A (pt) | 2004-09-08 |
US20200147334A1 (en) | 2020-05-14 |
US9533117B2 (en) | 2017-01-03 |
US8905082B2 (en) | 2014-12-09 |
DE60302302D1 (de) | 2005-12-22 |
TW200413045A (en) | 2004-08-01 |
CA2439765C (en) | 2011-04-05 |
EP1396276B1 (en) | 2005-11-16 |
US7469719B2 (en) | 2008-12-30 |
SG108937A1 (en) | 2005-02-28 |
TWI237574B (en) | 2005-08-11 |
EP1396276A2 (en) | 2004-03-10 |
US20220143351A1 (en) | 2022-05-12 |
BR0303478B1 (pt) | 2014-02-18 |
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