Volumetric respiration equipment

Claim 2

Volumetric respirator for reanimating a patient, comprising, in combination: a source of gases necessary for the patient's respiration; control means for inhalating said gases into the patient's lungs and subsequently permitting the patient's exhalation with an adjustable inhalation time to exhalation time ratio, said control means including a housing having first and second chambers separated by diaphragm means, an inlet valve connected to said first chamber, a first conduit connecting said source with said inlet valve, inhalation valve means connected to said first chamber adapted to open for allowing the flow of said gases into the patient's lungs, and exhalation valve means adapted to open for subsequently allowing the flow of the gas breathed out by said patient, patient connection means, a first controlled membrane-type valve member closed during the inhalation time and open during the exhalation time, said first controlled membrane-type valve member having an inlet port communicating with said second chamber, a control port and a vent port; an inhalation gas conduit connecting said inhalation valve means with said patient connection means; an exhalation gas conduit connecting said patient connection means with said exhalation valve means, a second controlled membrane-type valve member having an inlet port communicating with said exhalation valve means, a control port and a vent port, a second conduit connecting said vent port of said second controlled membrane-type valve member with said source, said second conduit including means permitting the regeneration of the gas breathed out by the patient; means for preserving the safety of operation of said respirator, consisting of a safety valve communicating with said exhalation gas conduit; means controlling said control means for inhalating said gases from said source into the patient's lungs and subsequently causing the patient to exhale comprising: a source of control fluid under pressure; a main circuit for directing said control fluid under pressure towards said second chamber; a circuit branched off said main control fluid circuit, which comprises in turn two branch lines leading to the control ports of said first and second membrane-type valve members, respectively; means permitting the delivery of said control fluid to said main circuit under a low pressure higher however than the pressure that the patient's lungs can withstand; said means controlling said control means including a housing having first and second chambers, said first chamber including an inlet port communicating with said source of control fluid, an outlet port communicating with said second chamber and an exhaust port communicating with atmosphere, and valve means for closing said inlet port and opening said exhaust port simultaneously, and opening said exhaust port and closing said inlet port simultaneously, said second chamber including movable means operatively associated with said valve means, filling means communicating between said main circuit and said second chamber of said controlling means for filling said second chamber with control fluid during a time period corresponding to the inhalation period and to be emptied during another time period corresponding to the exhalation time, and means associated with said filling means for adjusting as required the inhalation time to exhalation time ratio; said filling means including a needle valve for adjusting the frequency of the filling and emptying phases of said chamber in said control assembly; means between said means controlling said control means and said second chamber capable of providing a constant control fluid output, whereby the patient's compliance is compensated, said means providing a constant control fluid output including means for adjusting the value of said output.

Claim 3

Volumetric respirator as claimed in claim 1, wherein the pressure of the control fluid delivered to the main circuit is of the order of 120 g/sq.cm.

Claim 4

Volumetric respirator for anesthesia under assisted-respiration conditions, comprising, in combination: a source of anesthetic gases and oxygen necessary for the patient; control means for inhalating said anesthetic gases and oxygen into the patient's lungs and subsequently permitting the patient's exhalation with an adjustable inhalation time to exhalation time ratio, said control means including a housing having first and second chambers separated by diaphragm means, an inlet valve connected to said first chamber, a first conduit connecting said source with said inlet valve, inhalation valve means connected to said first chamber adapted to open for allowing the flow of said anesthetic gases and oxygen into the patient's lungs, and exhalation valve means adapted to open for subsequently allowing the flow of the gas breathed out by said patient, patient connection means, a first controlled membrane-type valve member closed during the inhalation time and open during the exhalation time, said first controlled membrane-type valve member having an inlet port communicating with said second chamber, a control port and a vent port; an inhalation gas conduit connecting said inhalation valve means with said patient connection means; an exhalation gas conduit connecting said patient connection means with said exhalation valve means, a second controlled membrane-type valve member having an inlet port communicating with said exhalation valve means, a control port and a vent port, a second conduit connecting said vent port of said second controlled membrane-type valve member with said source, said second conduit including means permitting the regeneration of the gas breathed out by the patient; means for preserving the safety of operation of said respirator, consisting of a safety valve communicating with said exhalation gas conduit; means controlling said control means for inhalating said anesthetic gases and oxygen from said source into the patient's lungs and subsequently causing the patient to exhale comprising: a source of control fluid under pressure; a main circuit for directing said control fluid under pressure towards said second chamber; a circuit branched off said main control fluid circuit, which comprises in turn two branch lines leading to the control ports of said first and second membrane-type valve members, respectively; means permitting the delivery of said control fluid to said main circuit under a low pressure higher however then the pressure that the patient's lungs can withstand; said means controlling said control means including a housing having first and second chambers, said first chamber including an inlet port communicating with said source of control fluid, an outlet port communicating with said second chamber and an exhaust port communicating with atmosphere, and valve means for closing said inlet port and opening said exhaust port simultaneously, and opening said exhaust port and closing said inlet port simultaneously, said second chamber including movable means operatively associated with said valve means, filling means communicating between said main circuit and said second chamber of said controlling means for filling said second chamber with control fluid during a time period corresponding to the inhalation period and to be emptied during another time period corresponding to the exhalation time, and means associated with said filling means for adjusting as required the inhalation time to exhalation time ratio; said filling means including a needle valve for adjusting the frequency of the filling and emptying phases of said chamber in said control assembly; means between said means controlling said control means and said second chamber capable of providing a constant control fluid output, whereby the patient's compliance is compensated, said means providing a constant control fluid output including means for adjusting the value of said output.

Claim 5

Volumetric respirator for anesthesia under assisted-respiration conditions, comprising, in combination: a source of anesthetic gases and oxygen necessary for the patient; control means for inhalating said anesthetic gases and oxygen into the patient's lungs and subsequently permitting the patient's exhalation with an adjustable inhalation time to exhalation time ratio, said control means including a housing having first and second chambers separated by diaphragm means, an inlet valve connected to said first chamber, a first conduit connecting said source with said inlet valve, inhalation valve means connected to said first chamber adapted to open for allowing the flow of said anesthetic gases and oxygen into the patient's lungs, and exhalation valve means adapted to open for subsequently allowing the flow of the gas breathed out by said patient, patient connection means, a first controlled membrane-type valve member closed during the inhalation time and open during the exhalation time, said first controlled membrane-type valve member having an inlet port communicating with said second chamber, a control port and a vent port; an inhalation gas conduit connecting said inhalation valve means with said patient connection means; an exhalation gas conduit connecting said patient connection means with said exhalation valve means, a second controlled membrane-type valve member having an inlet port communicating with said exhalation valve means, a control port and a vent port, a second conduit connecting said vent port of said second controlled membrane-type valve member with said source, said second conduit including means permitting the regeneration of the gas breathed out by the patient; means for preserving the safety of operation of said respirator, consisting of a safety valve communicating with said exhalation gas conduit; means controlling said control means for inhalating said anesthetic gases and oxygen from said source into the patient's lungs and subsequently causing the patient to exhale comprising: a source of control fluid under pressure; a main circuit for directing said control fluid under pressure towards said second chamber; a circuit branched off said main control fluid circuit, which comprises in turn two branch lines leading to the control ports of said first and second membrane-type valve members, respectively; means permitting the delivery of said control fluid to said main circuit under a low pressure higher however then the pressure that the patient's lungs can withstand; said means controlling said control means including a housing having first and second chambers, said first chamber including an inlet port communicating with said source of control fluid, an outlet port communicating with said second chamber and an exhaust port communicating with atmosphere, and valve means for closing said inlet port and opening said exhaust port simultaneously, and opening said exhaust port and closing said inlet port simultaneously, said second chamber including movable means operatively associated with said valve means, filling means communicating between said main circuit and said second chamber of said controlling means for filling said second chamber with control fluid during a time period corresponding to the inhalation period and to be emptied during another time period corresponding to the exhalation time, and means associated with said filling means for adjusting as required the inhalation time to exhalation time ratio; said filling means including a needle valve for adjusting the frequency of the filling and emptying phases of said chamber in said control assembly; means between said means controlling said control means and said second chamber capable of providing a constant control fluid output, whereby the patient's compliance is compensated, said means providing a constant control fluid output including means for adjusting the value of said output.

Claim 6

Volumetric respirator for ventilating a patient, comprising, in combination: a source of gases necessary for the patient's respiration; control means for inhalating said gases into the patient's lungs and subsequently permitting the patient's exhalation with an adjustable inhalation time to exhalation time ratio, said control means including a housing having first and second chambers separated by diaphragm means, an inlet valve connected to said first chamber, a first conduit connecting said source with said inlet valve, inhalation valve means connected to said first chamber adapted to open for allowing the flow of said gases into the patient's lungs, and exhalation valve means adapted to open for subsequently allowing the flow of the gas breathed out by said patient, patient connection means, a first controlled membrane-type valve member closed during the inhalation time and open during the exhalation time, said first controlled membrane-type valve member having an inlet port communicating with said second chamber, a control port and a vent port; an inhalation gas conduit connecting said inhalation valve means with said patient connection means; an exhalation gas conduit connecting said patient connection means with said exhalation valve means, a second controlled membrane-type valve member having an inlet port communicating with said exhalation valve means, a control port and a vent port, a second conduit connecting said vent port of said second controlled membrane-type valve member with atmosphere; means for preserving the safety of operation of said respirator, consisting of a safety valve communicating with said exhalation gas conduit; means controlling said control means for inhalating said gases from said source into the patient's lungs and subsequently causing the patient to exhale comprising: a source of control fluid under pressure; a main circuit for directing said control fluid under pressure towards said second chamber; a circuit branched off said main control fluid circuit, which comprises in turn two branch lines leading to the control ports of said first and second membrane-type valve members, respectively; means permitting the delivery of said control fluid to said main circuit under a low pressure higher however than the pressure that the patient's lungs can withstand; said means controlling said control means including a housing having first and second chambers, said first chamber including an inlet port communicating with said source of control fluid, an outlet port communicating with said second chamber and an exhaust port communicating with atmosphere, and valve means for closing said inlet port and opening said exhaust port simultaneously, and opening said exhaust port and closing said inlet port simultaneously, said second chamber including movable means operatively associated with said valve means, filling means communicating between said main circuit and said second chamber of said controlling means for filling said second chamber with control fluid during a time period corresponding to the inhalation period and to be emptied during another time period corresponding to the exhalation time, and means associated with said filling means for adjusting as required the inhalation time to exhalation time ratio; said filling means including a needle valve for adjusting the frequency of the filling and emptying phases of said chamber in said control assembly; means between said means controlling said control means and said second chamber capable of providing a constant control fluid output, whereby the patient's compliance is compensated, said means providing a constant control fluid output including means for adjusting the value of said output.

Claim 7

Volumetric respirator for ventilating a patient, comprising, in combination: a source of gases necessary for the patient's respiration; control means for inhalating said gases into the patient's lungs and subsequently permitting the patient's exhalation with an adjustable inhalation time to exhalation time ratio, said control means including a housing having first and second chambers separated by diaphragm means, an inlet valve connected to said first chamber, a first conduit connecting said source with said inlet valve, inhalation valve means connected to said first chamber adapted to open for allowing the flow of said gases into the patient's lungs, and exhalation valve means adapted to open for subsequently allowing the flow of the gas breathed out by said patient, patient connection means, a first controlled membrane-type valve member closed during the inhalation time and open during the exhalation time, said first controlled membrane-type valve member having an inlet port communicating with said second chamber, a control port and a vent port; an inhalation gas conduit connecting said inhalation valve means with said patient connection means; an exhalation gas conduit connecting said patient connection means with said exhalation valve means, a second controlled membrane-type valve member having an inlet port communicating with said exhalation valve means, a control port and a vent port, a second conduit connecting said vent port of said second controlled membrane-type valve member with atmosphere; means for preserving the safety of operation of said respirator, consisting of a safety valve communicating with said exhalation gas conduit; means controlling said control means for inhalating said gases from said source into the patient's lungs and subsequently causing the patient to exhale comprising: a source of control fluid under pressure; a main circuit for directing said control fluid under pressure towards said second chamber; a circuit branched off said main control fluid circuit, which comprises in turn two branch lines leading to the control ports of said first and second membrane-type valve members, respectively; means permitting the delivery of said control fluid to said main circuit under a low pressure higher however than the pressure that the patient's lungs can withstand; said means controlling said control means including a housing having first and second chambers, said first chamber including an inlet port communicating with said source of control fluid, an outlet port communicating with said second chamber and an exhaust port communicating with atmosphere, and valve means for closing said inlet port and opening said exhaust port simultaneously, and opening said exhaust port and closing said inlet port simultaneously, said second chamber including movable means operatively associated with said valve means, filling means communicating between said main circuit and said second chamber of said controlling means for filling said second chamber with control fluid during a time period corresponding to the inhalation period and to be emptied during another time period corresponding to the exhalation time, and means associated with said filling means for adjusting as required the inhalation time to exhalation time ratio; said filling means including a needle valve for adjusting the frequency of the filling and emptying phases of said chamber in said control assembly; means between said means controlling said control means and said second chamber capable of providing a constant control fluid output, whereby the patient's compliance is compensated, said means providing a constant control fluid output including means for adjusting the value of said output.