Medical Devices and Diagnostics Quiz

Element of introducing a new medical device to the market is: a. Conducting clinical trials b. Securing it against galvanic contact with the patient’s body c. Obtaining the CE certificate d. Obtaining a confirmation of the refund

• Conducting clinical trials

• Securing it against galvanic contact with the patient’s body

• Obtaining the CE certificate

• Obtaining a confirmation of the refund

Devices with class 1 protection are characterized by: a. Leak of protective grounding b. Basic insulation c. The lowest failure rate d. Internal power supply

• Leak of protective grounding

• Basic insulation

• The lowest failure rate

• Internal power supply

Devices with CF type protection can be used on the heart because: a. Have grounded metal housing parts b. Are marked with a heartbeat symbol in frame c. Have constant reference potential d. Have improved galvanic insulation of applicator

• Have grounded metal housing parts

• Are marked with a heartbeat symbol in frame

• Have constant reference potential

• Have improved galvanic insulation of applicator

Ultrasound devices in medical imaging use: a. Differences in the acoustic impedance of tissues b. Differences in electrical impedance of tissues c. Hoppfer effect d. Ultrasonic wave packets

• Differences in the acoustic impedance of tissues

• Differences in electrical impedance of tissues

• Hoppfer effect

• Ultrasonic wave packets

High speed of modern X-Ray tomography scanners is obtained with (kurde tu troche nwm): a. A moving electron beam and a stationary array of detectors b. Linear-rotary motion of the radiation beam and stationary sensor matrix c. Uniform bed movement and rotational movement of the radiation beam d. A moving beam of radiation and a moving array of detectors

• A moving electron beam and a stationary array of detectors

• Linear-rotary motion of the radiation beam and stationary sensor matrix

• Uniform bed movement and rotational movement of the radiation beam

• A moving beam of radiation and a moving array of detectors

The evoked potentials include: a. Electrochemical potentials b. Atrioventricular potentials c. Auditory potentials d. Inter-myelin potentials

• Electrochemical potentials

• Atrioventricular potentials

• Auditory potentials

• Inter-myelin potentials

Electromyographic examination requires the use of: a. At least two electrodes b. Stream of electrons from myosin c. Minimal voltage pulses d. Maximal current pulses

• At least two electrodes

• Stream of electrons from myosin

• Minimal voltage pulses

• Maximal current pulses

In EEG tests, the inter-electrode impedance is measured to: a. Determine the stroke volume of the heart b. Determine a substitutive model of nervous tissue c. Observe the electrical activity of nervous tissue d. Detect bad electrical contact of the electrode with the skin

• Determine the stroke volume of the heart

• Determine a substitutive model of nervous tissue

• Observe the electrical activity of nervous tissue

• Detect bad electrical contact of the electrode with the skin

Simultaneous stimulation of both heart ventricles occurs due to: a. His bundle b. Sinoatrial node c. Purkinje fibres d. Synchronization of the ventricles with the respiratory rhythm

• His bundle

• Sinoatrial node

• Purkinje fibres

• Synchronization of the ventricles with the respiratory rhythm

Recording of cardiac micro-potentials requires: a. Dual-band filter b. Band-pass filter c. Reduced sampling rate d. Increased amplification of the ECG

• Dual-band filter

• Band-pass filter

• Reduced sampling rate

• Increased amplification of the ECG