Portable field anesthesia machine and control therefore
First Claim
1. A portable anesthetic delivery device comprising:
- a chassis comprising a cradle which removably receives a vaporizer;
said vaporizer comprising a vaporizer input and a vaporizer outlet;
a panel extending up from said chassis;
said panel comprising a gas flow path, said gas flow path having gas inputs which receive carrier gases from sources of carrier gases, a manifold which combines the gases;
a carrier gas outlet and a carrier gas inlet connectable to the vaporizer input and vaporizer outlet, respectively, a common gas port to which a patient cannula can be connected, and flow control devices in the gas flow path to control the flow rate of the carrier gases into the device;
a support comprising a pair of arms and a member extending between an end of said arms;
at least one of said panel and said support being pivotal relative to other of said panel and support;
whereby, said device is selectively movable between a carrying position in which said support and said panel lie generally in a common plane and a use position in which said panel is angled relative to said support, such that said support in conjunction with said chassis maintain said panel in a generally upright position to facilitate use of the device.
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Accused Products
Abstract
A portable anesthetic machine or device is comprises a chassis having a cradle which removably receives a vaporizer. The device also includes a control panel and a carrying/support member. The control panel and support member are pivotal relative to each other to selectively change the machine from a carrying configuration or position to a use configuration or position. The control panel includes a gas flow path having gas inputs which receive carrier gases from sources of carrier gases, a manifold which combines the gases; a carrier gas outlet and a carrier gas inlet connectable to the vaporizer input and vaporizer outlet, respectively, a common gas port to which a patient cannula can be connected, and flow control devices in the gas flow path to control the flow rate of the carrier gases into the device. A controller is also provided which controls the flow of gas into and around the vaporizer based on vaporizer pressure and temperature, ambient pressure and temperature to maintain a substantially constant concentration of anesthetic agent in the gas stream delivered to the patient without the need to adjust the flow of gases from the gas supply sources.
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Citations
25 Claims
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1. A portable anesthetic delivery device comprising:
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a chassis comprising a cradle which removably receives a vaporizer;
said vaporizer comprising a vaporizer input and a vaporizer outlet;
a panel extending up from said chassis;
said panel comprising a gas flow path, said gas flow path having gas inputs which receive carrier gases from sources of carrier gases, a manifold which combines the gases;
a carrier gas outlet and a carrier gas inlet connectable to the vaporizer input and vaporizer outlet, respectively, a common gas port to which a patient cannula can be connected, and flow control devices in the gas flow path to control the flow rate of the carrier gases into the device;
a support comprising a pair of arms and a member extending between an end of said arms;
at least one of said panel and said support being pivotal relative to other of said panel and support;
whereby, said device is selectively movable between a carrying position in which said support and said panel lie generally in a common plane and a use position in which said panel is angled relative to said support, such that said support in conjunction with said chassis maintain said panel in a generally upright position to facilitate use of the device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. An anesthetic delivery device comprising:
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a vaporizer having an inlet and an outlet;
a gas flow path comprising gas inlets connectable to sources of air, oxygen and nitrous oxide;
a manifold in which said air, oxygen and nitrous oxide are combined to form a carrier gas;
a vaporizer;
a first carrier gas line extending from said manifold to said vaporizer inlet;
a second carrier gas line extending from said vaporizer outlet to a common gas port;
a by-pass line being connected at a first end to said carrier gas first line and at a second end to said carrier gas second line;
a by-pass valve operable to adjust the amount of carrier gas which passes through said by-pass line; and
sensors for monitoring various operating parameters of said device;
said operating parameters being selected from the group consisting of oxygen pressure, oxygen flow rate;
nitrous oxide pressure, nitrous oxide flow rate, air pressure, air flow rate, ambient atmospheric pressure, circuit pressure, internal vaporizer temperature, internal vaporizer pressure, gas pressure proximate the common gas port, gas flow rate proximate the common gas port, measure the end-tidal CO2 concentration in an exhalation branch of a breathing circuit, O2 concentration in the inhalation branch of a breathing circuit, and combinations thereof;
a controller;
said controller receiving signals from said sensors indicative of the parameter being monitored and said controller being in operatively connected to said by-pass valve;
said controller controlling said by-pass valve in response to the vaporizer pressure and vaporizer temperature to maintain the partial pressure of anesthetic agent in the carrier gas at a substantially constant value. - View Dependent Claims (23, 24, 25)
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Specification