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    Using pulse oximeter at home to test oxygen level in blood. — Stock Photo
    Using pulse oximeter at home to test oxygen level in blood.
    3d illustration of red blood cells erythrocytes. — Stock Photo
    3d illustration of red blood cells erythrocytes.
    Doctor holding oxygen mask over patient, male doctor adjusting IV drip — Stock Photo
    Doctor holding oxygen mask over patient, male doctor adjusting IV drip
    Closeup of anonymous female patient using pulseoximeter to measure level of oxygen in blood while putting device on finger in room — Stock Photo
    Closeup of anonymous female patient using pulseoximeter to measure level of oxygen in blood while putting device on finger in room
    Colored scanning electron micrograph of red blood cells. — Stock Photo
    Colored scanning electron micrograph of red blood cells.
    Front view of diverse doctors interacting with patients in the ward at hospital — Stock Photo
    Front view of diverse doctors interacting with patients in the ward at hospital
    Side view of little boy with asthma using inhaler while lying down on sofa at home — Stock Photo
    Side view of little boy with asthma using inhaler while lying down on sofa at home
    Nurse consoling senior patient with doctor in hospital — Stock Photo
    Nurse consoling senior patient with doctor in hospital
    Side view of little boy with asthma using inhaler while sitting on sofa at home — Stock Photo
    Side view of little boy with asthma using inhaler while sitting on sofa at home
    Man talking on mobile phone and paramedics examining injured boy on street in background — Stock Photo
    Man talking on mobile phone and paramedics examining injured boy on street in background
    Side view of diverse male patients sleeping in bed in the ward at hospital — Stock Photo
    Side view of diverse male patients sleeping in bed in the ward at hospital
    Vicuna (Vicugna vicugna) in the Altiplano of Argentina near Tolar Grande. — Stock Photo
    Vicuna (Vicugna vicugna) in the Altiplano of Argentina near Tolar Grande.
    Side view unrecognizable person wearing silver costume with breathing apparatus and hose attached to potted plant standing in shabby abandoned room — Stock Photo
    Side view unrecognizable person wearing silver costume with breathing apparatus and hose attached to potted plant standing in shabby abandoned room
    Cheerful child breathing in oxygen mask during inhalation and playing with soft toy on couch at home — Stock Photo
    Cheerful child breathing in oxygen mask during inhalation and playing with soft toy on couch at home
    Young woman with resuscitation mask and male hand. — Stock Photo
    Young woman with resuscitation mask and male hand.
    Scenic view of scuba divers swimming under water — Stock Photo
    Scenic view of scuba divers swimming under water
    Content mother putting on oxygen mask on face of son for inhalation procedure while sitting on sofa at home — Stock Photo
    Content mother putting on oxygen mask on face of son for inhalation procedure while sitting on sofa at home
    Male patient with nasal cannula, portrait. — Stock Photo
    Male patient with nasal cannula, portrait.
    Team of surgeons with scalpel are operation together on background of surgical lamp,Point of view shot. — Stock Photo
    Team of surgeons with scalpel are operation together on background of surgical lamp,Point of view shot.
    Pine forest landscape with long shadows cast by the sun in woods — Stock Photo
    Pine forest landscape with long shadows cast by the sun in woods
    Front view of diverse female doctors interacting with mature mixed-race female patient in the ward at hospital. Female patient is looking happy. — Stock Photo
    Front view of diverse female doctors interacting with mature mixed-race female patient in the ward at hospital. Female patient is looking happy.
    Skin blood vessel. Coloured scanning electron micrograph (SEM) of a blood vessel (arteriole) in the dermis of the skin. In the blood vessel are red blood cells (erythrocytes, red) which carry oxygen around the body — Stock Photo
    Skin blood vessel. Coloured scanning electron micrograph (SEM) of a blood vessel (arteriole) in the dermis of the skin. In the blood vessel are red blood cells (erythrocytes, red) which carry oxygen around the body
    Cheerful child breathing in oxygen mask during inhalation and playing with soft toy on couch at home — Stock Photo
    Cheerful child breathing in oxygen mask during inhalation and playing with soft toy on couch at home
    From above of crop unrecognizable vet with colleague putting oxygen mask on muzzle of cat while preparing for surgery — Stock Photo
    From above of crop unrecognizable vet with colleague putting oxygen mask on muzzle of cat while preparing for surgery
    Scenic view of female scuba diver swimming under water with fishes — Stock Photo
    Scenic view of female scuba diver swimming under water with fishes
    Doctors pushing emergency stretcher bed in corridor at hospital — Stock Photo
    Doctors pushing emergency stretcher bed in corridor at hospital
    Oxygen mask and tube on white background. — Stock Photo
    Oxygen mask and tube on white background.
    Blood oxygen monitor on finger of patient in intensive care ward. — Stock Photo
    Blood oxygen monitor on finger of patient in intensive care ward.
    Athlete in oxygen mask riding exercise bike with measuring of oxygen consumption. — Stock Photo
    Athlete in oxygen mask riding exercise bike with measuring of oxygen consumption.
    Caring woman using pulse oximeter on finger of ill boy in oxygen mask using nebulizer during inhalation at home — Stock Photo
    Caring woman using pulse oximeter on finger of ill boy in oxygen mask using nebulizer during inhalation at home
    Front view of diverse female doctors interacting with mature mixed-race female patient in the ward at hospital. Female patient is looking relieved. — Stock Photo
    Front view of diverse female doctors interacting with mature mixed-race female patient in the ward at hospital. Female patient is looking relieved.
    Athlete riding an exercise bike — Stock Photo
    Athlete riding an exercise bike
    Top view of crop unrecognizable doctor measuring blood oxygen of patient with heart rate monitor at table with stethoscope in clinic — Stock Photo
    Top view of crop unrecognizable doctor measuring blood oxygen of patient with heart rate monitor at table with stethoscope in clinic
    Paramedics examining injured boy on street — Stock Photo
    Paramedics examining injured boy on street
    Side view unrecognizable person in silver costume with breathing apparatus and hose attached to potted plant sitting on chair in weathered abandoned house room — Stock Photo
    Side view unrecognizable person in silver costume with breathing apparatus and hose attached to potted plant sitting on chair in weathered abandoned house room
    Nurse putting oxygen mask on patient in hospital — Stock Photo
    Nurse putting oxygen mask on patient in hospital
    Side view of little boy with asthma using inhaler while lying down on sofa at home — Stock Photo
    Side view of little boy with asthma using inhaler while lying down on sofa at home
    Top view of crop unrecognizable woman using modern pulse oximeter on finger of kid for measuring oxygen level in blood — Stock Photo
    Top view of crop unrecognizable woman using modern pulse oximeter on finger of kid for measuring oxygen level in blood
    Crop unrecognizable female vet with coworker in uniform standing at medical table with cat and tools during surgery — Stock Photo
    Crop unrecognizable female vet with coworker in uniform standing at medical table with cat and tools during surgery
    Paramedic giving oxygen to injured girl at accident spot — Stock Photo
    Paramedic giving oxygen to injured girl at accident spot
    Senior woman sleeping with nasal cannula. — Stock Photo
    Senior woman sleeping with nasal cannula.
    Low angle view of two surgeons holding laparoscopy equipment in operating theater — Stock Photo
    Low angle view of two surgeons holding laparoscopy equipment in operating theater
    Doctors pushing emergency stretcher bed in corridor at hospital — Stock Photo
    Doctors pushing emergency stretcher bed in corridor at hospital
    Surgeons performing operation in operation theater of hospital — Stock Photo
    Surgeons performing operation in operation theater of hospital
    Side view of Caucasian male patient sleeping with his hand on chest in bed in the ward at hospital — Stock Photo
    Side view of Caucasian male patient sleeping with his hand on chest in bed in the ward at hospital
    Front view of surgeons concentrated performing operation in operating room at hospital against spots and digital screen in background — Stock Photo
    Front view of surgeons concentrated performing operation in operating room at hospital against spots and digital screen in background
    Doctor with oximeter examining little patient — Stock Photo
    Doctor with oximeter examining little patient
    Crop unrecognizable veterinarian measuring pulse of cat with blood oxygen meter during operation in clinic — Stock Photo
    Crop unrecognizable veterinarian measuring pulse of cat with blood oxygen meter during operation in clinic
    Cardiovascular system transporting nutrients and oxygen — Stock Photo
    Cardiovascular system transporting nutrients and oxygen
    Boy in oxygen mask using nebulizer during inhalation while sitting on sofa and reading book — Stock Photo
    Boy in oxygen mask using nebulizer during inhalation while sitting on sofa and reading book
    Construction of plastic tubes and tools for treating animals in operating room of veterinary clinic — Stock Photo
    Construction of plastic tubes and tools for treating animals in operating room of veterinary clinic
    Paramedics examining injured boy on street — Stock Photo
    Paramedics examining injured boy on street
    High angle view of thoughtful mixed-race female patient relaxing in bed in the ward at hospital — Stock Photo
    High angle view of thoughtful mixed-race female patient relaxing in bed in the ward at hospital
    Doctor putting on woman resuscitation mask. — Stock Photo
    Doctor putting on woman resuscitation mask.
    Paramedic giving oxygen to injured girl at accident spot — Stock Photo
    Paramedic giving oxygen to injured girl at accident spot
    Female patient with nasal cannula, portrait. — Stock Photo
    Female patient with nasal cannula, portrait.
    Activated T lymphocytes and red blood cells on scanning electron micrograph. — Stock Photo
    Activated T lymphocytes and red blood cells on scanning electron micrograph.
    Front view of thoughtful mixed-race female patient lying in bed while pulse oximetry measures oxygen saturation in the blood in ward at hospital. — Stock Photo
    Front view of thoughtful mixed-race female patient lying in bed while pulse oximetry measures oxygen saturation in the blood in ward at hospital.
    Side view of diverse male patients interacting with each other in the ward at hospital. Caucasian male patient lying in bed while mixed-race patient sits in wheelchair. — Stock Photo
    Side view of diverse male patients interacting with each other in the ward at hospital. Caucasian male patient lying in bed while mixed-race patient sits in wheelchair.
    Side view of surgeon comforting pregnant woman during labor in operation theater at hospital — Stock Photo
    Side view of surgeon comforting pregnant woman during labor in operation theater at hospital