Designation:F1246–91(Reapproved2005)StandardSpecificationforElectricallyPoweredHomeCareVentilators,Part1—Positive-PressureVentilatorsandVentilatorCircuits1ThisstandardisissuedunderthefixeddesignationF1246;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversallelectricallypoweredlungventilatorsandventilatorcircuitsspecificallyintendedforuseinthehomeenvironment,andmarketedafterthefinaldateofapprovalforthisspecification.Breathingcircuitsintendedspecificallyforusewithhomecareventilatorsarealsoincludedwithinthescopeofthisspecification.Theapplicationofcriticalcareventilators,anesthesiaventilators,emergencycaretransportventilators,andresuscitatorsinthehomeenviron-mentisnotcoveredbythisspecification.Aswell,thisspecificationdoesnotcoverhighfrequencyventilatorsorexternalbodyventilators.Part1ofthisspecificationaddressespositivepressureventilators,andPart2addressesnegativepressureventilators.(SeealsoX1.1.1.)1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.1.3Thefollowingprecautionarycaveatpertainstothetestmethodportiononly,Section6,ofthisspecification.Thisstandardmayinvolvehazardousmaterials,operations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyproblemsassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2F1054SpecificationforConicalFittings33.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1breathingsystem—gaspathwaysindirectconnectionwiththepatientthroughwhichintermittentorreciprocatinggasflowoccursandintowhichamixtureofcontrolledcompositionmaybedispensed.3.1.2end-expiratorypressure—pressureinthebreathingsystemattheendoftheexpiratoryphasetime,prior...
