Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Doppler studies

it is a PPT which explains what is doppler, its types and Nurses responsibilities

  • Be the first to comment

  • Be the first to like this

Doppler studies

  1. 1. DOPPLER STUDIES Srividhya.N
  2. 2. Introduction This term was first described by Christian Doppler in 1842. It is used to measure blood flow and used as a diagnostic tool for peripheral vascular disease.
  3. 3. Doppler Effect Change in the perceived frequency of sound emitted by a moving source.
  4. 4. Definition A doppler ultrasound is a noninvasive test that can be used to estimate the blood flow through blood vessels by emitting high frequency sound waves
  5. 5. Indications ● Identify blood clots ● Diagnose poorly functioning valves in legs ● Venous insufficiency ● Aneurysms ● Carotid artery stenosis ● Used when pulses are not palpable
  6. 6. Functioning of doppler machine ● A handheld doppler transducer emits continuous signal through the patient's tissues ● The signals are reflected by the moving blood cells and received by the device ● Then this signal is transmitted to a loudspeaker or headphones ● The depth is measured by frequency (MH3)
  7. 7. Types of doppler ultrasound ● Continuous wave system(CW) ● Pulsed wave system (PW) ● Duplex Mode (B move or Grey scale) ● Triplex mode ( Color mode)
  8. 8. Nursing care ● No preparation required ● NPO in case of doppler ultrasound abdomen or kidney ● Explain procedure ● Get informed consent ● Note and report any neurological symptoms to.prevent injury
  9. 9. Plethysmography/Arteriography
  10. 10. Introduction The word plethysmography is derived from the Greek word ‘plethysmos’ means increasing , enlarging and ‘ graphos’ means “ to write” DEFINITION it is an instrument which measures the changes in volume in different areas of the body and they are attached to a machine called plethysmograph
  11. 11. Indications ● Check arterial blood flow of the extremities ● It also helps to measure the amount of air hold in the lungs ( Lung capacities) TYPES: Limb plethysmography Lung plethysmography
  12. 12. Preparation ● No special instructions required ● Consent ● If it is lung- No smoking - No aerobics for 8 hrs before test - Light meals - Wear loose comfortable clothing
  13. 13. Arteriography It is an x ray examination of the arteries to diagnose block in blood vessels. The procedure and preparation is as same like angiography

×