Day 2

Color doppler uses

Uterine arteries

How does doppler sound move

Elastic fashion, repeating pressure waves

Amplitude is

the loudness of the wave

Velocity is deternined by

Type of material, temp of material

Refracted sound wave

Travels through, encounters irregularities smaller than the sound beam

Attenuation sound wave

When it comes out, weaking of sound as it goes through a medium

Accoustic impedance

Resistance

Accoustic interface

Point of contact

Directional transducer

Moving

Ranged transducer

Distance, how far

Need for fetal assesment

Reduction of mortality and morbidity

Mortality

Death rate

Morbility

Defects, quality of birth

Fetal Heart Rate

FHR

Uterine Activity

UA

Antepartum FHM

Before labor and delivery

Antepartem FHM are used in a physicians office or clinic for what?

To asses fetal oxygen levels

Intrapartum FHM

During labor and delivery

Phonocardiography

Microphone

Average FHR

140 bpm

Baseline variability

Single most important feature, normal irregularity of cardiac rhythm

Pressure monitoring

Tocotransducer

Internal monitoring - Spiral electrode, spiral tip

Measures FHR using a metal plate attached to the maternal thigh to act as a reference

Internal monitoring, pressure monitoring uses a what

Intrauterine cathetor

What does pressure monitoring do

Monitors the contractions frequency, duration, and intensity

Cardiogenic shock

Diminishment of cardiac output

Cardioversion

Restoration of the sinus rhythm by electrical shock

Manual defibrillators

Determine timing of the elctrical shock, 2000-4000 Volts, less than 20 msec

Manual internal defibrillators

50 joules

Sync marker will show up on

The patients R curve

When will the sync marker show up on the patients R wave

30ms (sync), 20ms (async)

Timing is critical because

Discharge during the T-wave could cause fibrillation