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

1. DOPPLER STUDIES
Srividhya.N

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. Doppler Effect
Change in the perceived frequency of sound emitted by a moving source.

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. Indications
● Identify blood clots
● Diagnose poorly functioning valves in legs
● Venous insufficiency
● Aneurysms
● Carotid artery stenosis
● Used when pulses are not palpable

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. Types of doppler ultrasound
● Continuous wave system(CW)
● Pulsed wave system (PW)
● Duplex Mode (B move or Grey scale)
● Triplex mode ( Color mode)

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. Plethysmography/Arteriography

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. 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. 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. 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