CN101549185A - Electric control end-expiratory positive pressure expiratory valve - Google Patents

Abstract

The invention relates to an electric control end-expiratory positive pressure expiratory valve used on an electric respirator. An electric control end-expiratory positive pressure expiratory valve system consists of an expiratory valve body 7, an expiratory valve core 6, a membrane 5, a membrane 4, an expiratory end cover 3, an electromagnet coil 2 and an electromagnet core 1. The electric control end-expiratory positive pressure expiratory valve can accurately control the end-expiratory positive pressure of patients under the control of a microprocessor. The invention provides a method of the electric control end-expiratory positive pressure expiratory valve used on an electric respirator.

Description

Electric control end-expiratory positive pressure expiratory valve

Technical field:

The present invention relates to the method for a kind of electric pulmotor, belong to the biomedical engineering technology field with electric control end-expiratory positive pressure expiratory valve.

Background technology:

Positive end expiratory pressure refers to that ventilator produces malleation in inspiratory phase, and gas is pressed in the lung; But in end-tidal, airway pressure does not reduce to zero, and remains on certain malleation level.Principal indication is the hypoxemia due to the QS pulmonary shunt.Positive end expiratory pressure is corrected the mechanism of hypoxemia: positive end expiratory pressure helps alveolar and still keeps expanding in end-tidal, and can prevent the closure of little air flue, its physiological action is: reduce alveolar and wither, reduce QS pulmonary shunt, correct the low pneumophemia due to the QS pulmonary shunt; Increase FRC, help the abundant exchange of alveolar-blood capillary both sides gas.The main purpose of using end expiratory positive pressure is increase lung volume, improves Map power, improves oxygenate.In addition, end expiratory positive pressure can also be offseted intrinsic positive end expiratory pressure, reduces the inspiration trigger merit that intrinsic positive end expiratory pressure causes.General electric pulmotor is owing to do not control gas when exhaling, so generally all adopt manual adjustments end expiratory positive pressure value.And manual adjustments end expiratory positive pressure value can not accomplish convenient adjusting accurately to have certain defective.The electric control end-expiratory positive pressure expiratory valve of the electric pulmotor that abroad has at present is automatically controlled fully, has slow shortcoming of response time.

Summary of the invention:

The objective of the invention is to provide a kind of method or device of electric control end-expiratory positive pressure expiratory valve at above-mentioned deficiency.The present invention can control patient's end expiratory positive pressure accurately under microprocessor control; Have simple in structure, long, cost performance advantages of higher of life-span.

Technical scheme of the present invention is: the electric control end-expiratory positive pressure expiratory valve system that electric control end-expiratory positive pressure expiratory valve of the present invention is made up ofexpiration valve body 7, expiration spool 6,diaphragm 5, diaphragm 4,expiration end cap 3,electromagnet coil 2, electromagnetic core 1.During work, when electric pulmotor was not provided with the end expiratory positive pressure value, electric magnet did not have adhesive, and electromagnetic core is not closed outlet valve, at this moment, and the opening or closing of the control gas control system outlet valve that outlet valve is sent here by electric pulmotor fully.When electric pulmotor is provided with the end expiratory positive pressure value, in the patient inhales stage, close by the control gas control system outlet valve that electric pulmotor is sent here, make patient inhales; In the patient exhales stage, the initial stage of patient exhales, control gas in the outlet valve is discharged control gas by electromagnetic core 1, outlet valve is unlimited fully, and patient normally exhales, when the pressure of patient expired gas drops to the end expiratory positive pressure value of electric pulmotor setting, electromagnetic actuation, electromagnetic core 1 is closed outlet valve, remains to air-breathing beginning always, and the pressure in the corrugated hose maintains the end expiratory positive pressure value of setting at this moment.

The advantage of electric control end-expiratory positive pressure expiratory valve of the present invention is to control the end expiratory positive pressure value accurately, and does not influence the response time that outlet valve opens and closes; The present invention is used on the electric electricing breathing machine, and outlet valve only is being provided with the end expiratory positive pressure value and when breath pressure reaches the end expiratory positive pressure value, and just adhesive of electric magnet is so there is the advantage of saves energy; Because at the initial stage of exhaling, electric control end-expiratory positive pressure expiratory valve is opened fully, can not produce resistance to exhaling, institute so that patient exhales as snug as a bug in a rug.

Description of drawings:

Accompanying drawing is the sketch map of electric control end-expiratory positive pressure expiratory valve of the present invention

Specific implementation method:

Expiration valve body 7 of the present invention and expiration spool 6 all are mouldings, they are interference fit, can not leak gas after the installation, diaphragm 4,diaphragm 5 are silicone rubber spares, and the pad that all has up and down ofdiaphragm 5 is pushed down, and diaphragm 4 is to be fixed on the electromagnetic core 1, diaphragm 4 just can move with the electromagnetic core adhesive like this, the opening and closing of control outlet valve,expiration end cap 3 andexpiration valve body 7 are installed together, and push down diaphragm 4 fixing.Electric magnet can adopt 12V voltage electric magnet.

Claims (4)

1, electric control end-expiratory positive pressure expiratory valve is characterized in that: for the automatically controlled end expiratory positive pressure of the electric pulmotor system that is made up of expiration valve body 7, expiration spool 6, diaphragm 5, diaphragm 4, expiration end cap 3, electromagnet coil 2 and electromagnetic core 1.

2, electric control end-expiratory positive pressure expiratory valve as claimed in claim 1 is characterized in that: a described electromagnet coil 2 and electromagnetic core 1 that can pass through control gas of comprising.

3, electric control end-expiratory positive pressure expiratory valve as claimed in claim 1, it is characterized in that: described expiration valve body 7, expiration spool 6, diaphragm 4 and diaphragm 5, they form a control air cavity, be used for patient and control gas enter air cavity and close outlet valve when air-breathing, control gas is discharged and is opened outlet valve when exhaling.

4, electric control end-expiratory positive pressure expiratory valve as claimed in claim 1, it is characterized in that: described electromagnet coil 2 and electromagnetic core 1, they form an electric control end-expiratory positive pressure expiratory valve device, when electric pulmotor is not provided with the end expiratory positive pressure value, electric magnet does not have adhesive, electromagnetic core 1 is not closed outlet valve, and this moment, outlet valve opened or closed outlet valve by control gas fully; When electric pulmotor is provided with the end expiratory positive pressure value, during patient inhales, close outlet valve by the control QI GUAN, during expiration, as patient during in the end expiratory positive pressure value of exhaling set, electromagnetic actuation, electromagnetic core 1 is closed outlet valve, makes end-tidal pressure remain on a force value.

Images