JP5231902B2 - 硝子体手術装置 - Google Patents
硝子体手術装置 Download PDFInfo
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- JP5231902B2 JP5231902B2 JP2008225344A JP2008225344A JP5231902B2 JP 5231902 B2 JP5231902 B2 JP 5231902B2 JP 2008225344 A JP2008225344 A JP 2008225344A JP 2008225344 A JP2008225344 A JP 2008225344A JP 5231902 B2 JP5231902 B2 JP 5231902B2
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- 238000001356 surgical procedure Methods 0.000 title claims description 20
- 238000005520 cutting process Methods 0.000 claims description 41
- 210000004127 vitreous body Anatomy 0.000 claims description 22
- 230000007423 decrease Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 5
- 210000005252 bulbus oculi Anatomy 0.000 claims description 3
- 230000004044 response Effects 0.000 claims description 2
- 230000006835 compression Effects 0.000 description 20
- 238000007906 compression Methods 0.000 description 20
- 210000001525 retina Anatomy 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000010412 perfusion Effects 0.000 description 4
- 210000001508 eye Anatomy 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000881 depressing effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002271 resection Methods 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/007—Methods or devices for eye surgery
- A61F9/00736—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments
- A61F9/00763—Instruments for removal of intra-ocular material or intra-ocular injection, e.g. cataract instruments with rotating or reciprocating cutting elements, e.g. concentric cutting needles
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- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Heart & Thoracic Surgery (AREA)
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- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Vascular Medicine (AREA)
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- Animal Behavior & Ethology (AREA)
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- Public Health (AREA)
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Description
(1) 先端に吸引口が形成された外筒刃と外筒刃の軸方向に移動可能に設けられた内筒刃とを持つ硝子体カッターであって,シリンダ内の空気室への圧縮空気の供給と排気を繰り返すことによりピストンを往復移動させ,ピストンに取り付けられた内筒刃を外筒刃に対してその軸方向に往復移動させて硝子体を切除し,切除された硝子体を眼球外に排出する硝子体カッターと、空気室へ圧縮空気を供給するために圧縮空気を発生する圧縮空気発生源と、該圧縮空気発生源と前記硝子体カッターの空気室との間に配置され、弁の開閉により圧縮空気発生源からの圧縮空気の供給と空気室からの圧縮空気の排気とを切換える電磁弁と、を備える硝子体手術装置において、前記圧縮空気発生源から前記電磁弁の経路又は前記電磁弁から前記空気室までの経路に配置され,前記空気室に供給される圧縮空気の圧力を検知する圧力センサか,又は装置が設置された場所の大気圧を検知する気圧センサ,あるいは装置が設置された場所の高度を計測する高度計からなるセンサと、該センサの検知結果に基づいて前記電磁弁の開閉時間を制御する制御手段と、
を備えることを特徴とする。
(2) (1)の硝子体手術装置は、硝子体カッターのカッティング速度を設定する信号を入力する設定手段を備え、前記センサは前記空気室に供給される圧縮空気の圧力を検知する圧力センサであり、前記制御手段は、設定されたカッティング速度に基づいて前記電磁弁の開閉時間を制御すると共に、前記圧力センサにより検知された圧力に応じて、カッティング速度を維持したまま、前記電磁弁の開閉のON/OFFの1サイクルにおけるON時間のデューティ比を変更することを特徴とする。
(3) (2)の硝子体手術装置において、前記制御手段は前記圧力センサにより検知された圧力が低くなるにしたがって前記電磁弁のデューティ比を高めることを特徴とする。
(4) (3)の硝子体手術装置は、前記空気室の圧力が前記内筒刃の往復移動により前記外筒刃の吸引口が完全に閉じられるときに必要な第1圧力レベルを上回り、且つ第1圧力レベルより低い第2圧力レベルであって前記吸引口が完全に開けられるときに必要な第2圧力レベルを下回るように、前記設定手段により設定されるカッティング速度毎に前記圧力センサの検知圧力に応じて予め定められたデューティ比を記憶する記憶手段を備え、前記制御手段は、前記設定手段により設定されるカッティング速度及び前記圧力センサの検知圧力に応じて前記記憶手段に記憶されたデューティ比を呼び出して前記電磁弁の開閉を制御することを特徴とする。
6a 空気室
12 電磁弁
20 圧縮ポンプ
30 制御部
35 フットスイッチ
40 圧力センサ
Claims (4)
- 先端に吸引口が形成された外筒刃と外筒刃の軸方向に移動可能に設けられた内筒刃とを持つ硝子体カッターであって,シリンダ内の空気室への圧縮空気の供給と排気を繰り返すことによりピストンを往復移動させ,ピストンに取り付けられた内筒刃を外筒刃に対してその軸方向に往復移動させて硝子体を切除し,切除された硝子体を眼球外に排出する硝子体カッターと、空気室へ圧縮空気を供給するために圧縮空気を発生する圧縮空気発生源と、該圧縮空気発生源と前記硝子体カッターの空気室との間に配置され、弁の開閉により圧縮空気発生源からの圧縮空気の供給と空気室からの圧縮空気の排気とを切換える電磁弁と、を備える硝子体手術装置において、
前記圧縮空気発生源から前記電磁弁の経路又は前記電磁弁から前記空気室までの経路に配置され,前記空気室に供給される圧縮空気の圧力を検知する圧力センサか,又は装置が設置された場所の大気圧を検知する気圧センサ,あるいは装置が設置された場所の高度を計測する高度計からなるセンサと、
該センサの検知結果に基づいて前記電磁弁の開閉時間を制御する制御手段と、
を備えることを特徴とする硝子体手術装置。 - 請求項1の硝子体手術装置は、硝子体カッターのカッティング速度を設定する信号を入力する設定手段を備え、
前記センサは前記空気室に供給される圧縮空気の圧力を検知する圧力センサであり、
前記制御手段は、設定されたカッティング速度に基づいて前記電磁弁の開閉時間を制御すると共に、前記圧力センサにより検知された圧力に応じて、カッティング速度を維持したまま、前記電磁弁の開閉のON/OFFの1サイクルにおけるON時間のデューティ比を変更することを特徴とする硝子体手術装置。 - 請求項2の硝子体手術装置において、前記制御手段は前記圧力センサにより検知された圧力が低くなるにしたがって前記電磁弁のデューティ比を高めることを特徴とする硝子体手術装置。
- 請求項3の硝子体手術装置は、前記空気室の圧力が前記内筒刃の往復移動により前記外筒刃の吸引口が完全に閉じられるときに必要な第1圧力レベルを上回り、且つ第1圧力レベルより低い第2圧力レベルであって前記吸引口が完全に開けられるときに必要な第2圧力レベルを下回るように、前記設定手段により設定されるカッティング速度毎に前記圧力センサの検知圧力に応じて予め定められたデューティ比を記憶する記憶手段を備え、
前記制御手段は、前記設定手段により設定されるカッティング速度及び前記圧力センサの検知圧力に応じて前記記憶手段に記憶されたデューティ比を呼び出して前記電磁弁の開閉を制御することを特徴とする硝子体手術装置。
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JP3117142B2 (ja) * | 1990-11-16 | 2000-12-11 | 株式会社トプコン | 眼科手術装置 |
JP4021091B2 (ja) * | 1999-03-03 | 2007-12-12 | 株式会社ニデック | 角膜手術装置 |
JP2001087303A (ja) * | 1999-09-27 | 2001-04-03 | Nidek Co Ltd | 眼科手術装置 |
JP4021141B2 (ja) * | 2000-10-20 | 2007-12-12 | 株式会社ニデック | 硝子体手術装置 |
US9241830B2 (en) * | 2006-12-15 | 2016-01-26 | Novartis Ag | Pressure monitor for pneumatic vitrectomy machine |
US8312800B2 (en) * | 2006-12-21 | 2012-11-20 | Novartis Ag | Pneumatic system for a vitrector |
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WO2024076736A1 (en) * | 2022-10-06 | 2024-04-11 | Bausch + Lomb Ireland Limited | Elevation-dependent pneumatic vitrectomy system |
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