In discussion of their study, the authors reflect on the limitations of using pulse oximetry SpO 2 rather than arterial p O 2 to assess patient oxygenation status. May contain information that is not supported by performance and intended use claims of Radiometer's products.
See also Legal info. Radiometer and acutecaretesting. Printed from acutecaretesting. September Is venous blood an acceptable alternative to arterial blood for blood gas analysis — and can pulse oximetry help make it so? Correlation of venous blood gas and pulse oximetry with arterial blood gas in the undifferentiated critically ill patient. J Intensive Care Med Published on line ahead of print publication 9th June When the clot develops in a vein deep within the leg, it is called deep vein thrombosis DVT.
The condition can be life threatening if the clot breaks loose from the vein and travels to the lungs, where it can completely block blood flow. Blood clots in the veins are usually caused by slowed blood flow to the legs and feet, which can cause the blood to clot. Venous blood clots may also be caused by damage to a vein from an injury or infection. Blood flow may be slowed because of physical inactivity—being confined to a bed or having an inactive lifestyle.
Some people have slowed blood flow after sitting for a long time, such as on a long plane ride. Other factors that lead to slowed blood flow in the legs and feet include smoking, heart disease, diabetes, high blood pressure, and certain tumors.
The use of certain hormones, particularly estrogen, and pregnancy have been shown to increase the risk for blood clots in the legs.
Step-by-Step Description of Procedure. Identify and prepare the site Obtain the blood sample. Warnings and Common Errors. Tips and Tricks. Test your knowledge. Prior to beginning tracheal intubation, it is important to first correctly position the patient, prepare the medical equipment, and do which of the following additional actions? More Content. Click here for Patient Education.
Need for a venous blood sample for laboratory study. Absolute contraindications. Infection or hematoma at a prospective venipuncture site. In the above situations, use another site eg, the opposite arm for venipuncture. Complications are uncommon and include. Local infection. Vein-finder device eg, infrared vein viewer, ultrasonography device. Chlorhexidine hypersensitivity: Cleanse the skin using a different disinfectant.
Support the supinated forearm or other chosen site on a comfortable surface. Identify and prepare the site Do a preliminary inspection nonsterile to identify a suitable vein: Apply a tourniquet, have the patient make a fist, and palpate using your index finger to locate a large-diameter vein that is nonmobile and has good turgor. Palpate with your gloved finger to locate the middle of the target vein.
Begin to withdraw the blood sample and, when blood begins to flow, remove the tourniquet. Have the patient or an assistant continue to apply pressure to the site. Was This Page Helpful? Yes No. How To Do Lumbar Puncture. Specimen Type Method of Collection Common Use Venous Direct puncture of vein by venipuncture; vascular access device Routine laboratory tests Arterial Direct puncture of artery; vascular access device Arterial blood gases Capillary Dermal puncture of fingertip or heel Infants and young children Elderly patients with fragile veins Severly burned patients Point-of-care testing.
Venous, Arterial, and Capillary Blood Specimens. How to Subscribe. Need multiple seats for your university or lab? Get a quote. Venous Blood.
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