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Saturday, October 18, 2008

Medical ventilator


A medical ventilator may be defined as an automatic machine designed to mechanically move breatheable air into and out of the lungs, to provide the mechanism of breathing for a patient who is physically unable to breathe, or breathing insufficientlyIn its simplest form, a modern positive pressure ventilator consists of a compressible air reservoir, air and oksigen supplies, a set of valves and tubes, and a disposable or reusable "patient circuit". The air reservoir is pneumatically compressed several times a minute to deliver room-air, or in most cases, an air/oxygen mixture to the patient. When overpressure is released, the patient will exhale passively due to lung elasticity, the exhaled air being released usually through a one-way valve within the patient circuit. The oxygen content of the inspired gas can be set from 21 percent (ambient air) to 100 percent (pure oxygen). Pressure and flow characteristics can be set mechanically or electronically.
Ventilators may also be equipped with monitoring and alarm systems for patient-related parameters (e.g. pressure, volume, and flow) and ventilator function (e.g. air leakage, power failure, mechanical failure), backup batteries, oxygen tanks, and remote control. The pneumatic system is nowadays often replaced by a computer-controlled turbopupm
Modern ventilators are electronically controlled by a small embedded system to allow exact adaptation of pressure and flow characteristics to an individual patient's needs. Fine-tuned ventilator settings also serve to make ventilation more tolerable and comfortable for the patient. In Germany, Canada, and the United States, respiratory therapists are responsible for tuning these settings.
The patient circuit usually consists of a set of three durable, yet lightweight plastic tubes, separated by function (e.g. inhaled air, patient pressure, exhaled air). Determined by the type of ventilation needed, the patient-end of the circuit may be either noninvasive or invasive.
Noninvasive methods, which are adequate for patients who require a ventilator only while sleeping and resting, mainly employ a nasal mask. Invasive methods require intubation, which for long-term ventilator dependence will normally be a tracheotomy cannula, as this is much more comfortable and practical for long-term care than is larynx or nasal intubation.

MANUFACTURE :

ANDA Medical

2678 Lancaster RoadOttawa, ONK1B 4T7CanadaT 613 726-7811 F 613 828-1097 sales@andamedical.com


Intersurgical Crane House,

Molly Millars LaneWokingham, BerkshireRG41 2RZ, EnglandTel: +44 (0)118 9656 300Fax: +44 (0)118 9656 356e-mail:enquiries@intersurgical.co.uk

GINEVRI

s.r.l.Via Cancelliera, 25/D00040 Cecchina (Roma)ItalyTel: +39 06 934591Fax: +39 06 934 59393

Maquet Critical Care

ABRöntgenvägen 2171 95 Solna - SwedenPhone: (+46) 8 730 77 56

Phoenix Medical Equipment

3000, avenue Watt, suite 15Québec (Québec) G1X 3Y8, CanadaPhone : (418) 650-0004Fax : (418) 650-0054Cell. : (418) 570-3865

WILLY RÜSCH AG

P.O. Box 1180D-71385 Kernen, GermanyTel: ++49-7151-406-0Fax: ++49-7151-406-150

SIEMENS MEDICAL

USA1-877-777-9381

Soma Technology

oma Technology, Inc.166 Highland Park Dr.Bloomfield, CT 06002Tel: 860-218-2575Fax: 860-218-2565

Stephan GMBH F. Stephan GmbH

MedizintechnikKirchstrasse 1956412 GackenbachGermany

Viasys Healthcare

World Headquarters1100 Bird Center Drive, Palm Springs, CA 92262-8099 U.S.A.Tel: +1 (760) 778-7200 Fax (760) 778-7274European OfficeRembrandtlaan 1b, 3723 BG BilthovenP.O. Box 299, 3720 AG Bilthoven, The Netherlands(31) 30 2289 711 . Fax (31) 30 2286 244


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