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Fetal Doppler – NSL800C33/34

Model:NSL800C33

Display screen: 1.77 inch LCD black and white screen;
Parameters: FHR value, fetal heart waveform;
Range & accuracy: FHR measurement range: 50-230bpm, Accuracy: ±2bpm;
Measuring modes: Real-time, average and manual counting;
Ultrasound frequency: 2.0 MHz (3.0 MHz optional);
Dimension: L*W*H 135mm*95mm*35mm;
Weight: 450g (with battery);
Backlight and speaker: Yes;
Battery Life: Two AA alkaline batteries continuous operating time: >8 hours;

 

ChoiceMMed Fetal Doppler Feature

  • High sensitivity Doppler Probe
  • Display work parameters and fetal heart rate value.
  • 6 work modes for your Choice:real-time, average, manual, freeze, backlight and demo modes
  • Sound output with earphone and speaker
  • High performance, clear sound quality
  • Compact design and easy operation
  • Power off automatically

 

Description

A Fetal Doppler – NSL800C33/34 is a hand-held ultrasound transducer used to detect the fetal heartbeat for prenatal care. It uses the Doppler effect to provide an audible simulation of the heart beat. Some models also display the heart rate in beats per minute (BPM). Use of this monitor is sometimes known as Doppler auscultation. The Doppler fetal monitor is commonly referred to simply as a Doppler or fetal Doppler. It may be classified as a form of Doppler ultrasonography (although usually not technically -graphy but rather sound-generating).

Doppler fetal monitors provide information about the fetus similar to that provided by a fetal stethoscope. One advantage of the Doppler fetal monitor over a (purely acoustic) fetal stethoscope is the electronic audio output, which allows people other than the user to hear the heartbeat. One disadvantage is the greater complexity and cost and the lower reliability of an electronic device.

It was recently demonstrated that continuous Doppler enables the auscultation of valvular movements and blood flow sounds that are undetected during cardiac examination with a stethoscope in adults. The Doppler auscultation presented a sensitivity of 84% for the detection of aortic regurgitations, while classic stethoscope auscultation presented a sensitivity of 58%. Moreover, Doppler auscultation was superior in the detection of impaired ventricular relaxation Since the physics of Doppler auscultation and classic auscultation are different, it has been suggested that both methods could complement each other.

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