Ventilatory system with additional gas administrator
First Claim
1. A ventilatory system for ventilating a patient, comprising:
- a ventilator provided with at least one first inlet for supplying a predetermined first gas mixture to said ventilator and at least one outlet for supplying a controlled amount of said predetermined first gas mixture to said patient during inspiration intervals; and
a gas administration module connected either downstream or upstream from said ventilator and arranged for administering a predetermined amount of an additional gas to said patient, said gas administration module being provided with a predetermined number of valve units which are connected in parallel and can each be independently switched between a closed state and an open state for supplying a predetermined amount of said additional gas to said patient, each of the valve units being provided with a series connection of a throttle valve with a throttle valve inlet and outlet and a controlled valve with a controlled valve inlet and outlet, said controlled valve being switchable between an open and a closed state with a predetermined frequency, said throttle valve outlet being connected to said controlled valve inlet such that there is a passage with a volume V between said throttle valve and said controlled valve that is selected to be so small that the pressure within the passage is returned to the pressure at the throttle valve inlet at any time the controlled valve opens.
2 Assignments
0 Petitions
Accused Products
Abstract
A ventilatory system for ventilating a patient includes a gas administration module for administering a predetermined amount of an additional gas, such as NO, to the patient, the gas administration module being provided with a predetermined number of parallel valve units each provided with a throttle valve and a controlled valve in series, the internal volume between the throttle valve and the controlled valve being so small that no interfering effects occur due to opening and closing of the controlled valve with a frequency below a maximum frequency. Preferably, the system is also provided with a tracheal gas insufflation (TGI) module and a measurement system for measuring the concentration of the additional gas.
-
Citations
25 Claims
-
1. A ventilatory system for ventilating a patient, comprising:
-
a ventilator provided with at least one first inlet for supplying a predetermined first gas mixture to said ventilator and at least one outlet for supplying a controlled amount of said predetermined first gas mixture to said patient during inspiration intervals; and a gas administration module connected either downstream or upstream from said ventilator and arranged for administering a predetermined amount of an additional gas to said patient, said gas administration module being provided with a predetermined number of valve units which are connected in parallel and can each be independently switched between a closed state and an open state for supplying a predetermined amount of said additional gas to said patient, each of the valve units being provided with a series connection of a throttle valve with a throttle valve inlet and outlet and a controlled valve with a controlled valve inlet and outlet, said controlled valve being switchable between an open and a closed state with a predetermined frequency, said throttle valve outlet being connected to said controlled valve inlet such that there is a passage with a volume V between said throttle valve and said controlled valve that is selected to be so small that the pressure within the passage is returned to the pressure at the throttle valve inlet at any time the controlled valve opens. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
-
Specification