What forces drive the kidneys' filtration?
The kidneys' filtration process is driven by blood pressure. The kidneys eliminate waste from the body through a process called filtering. Every 45 minutes, the kidney processes all of the blood's water. While the beneficial components of the blood's water are reabsorbed into the bloodstream, waste products are redirected into ducts and expelled from the body. The series of unconscious muscle contractions known as peristalsis is what moves food through the digestive tract.
Which of the following conventional ECG leads allows you to see the heart's inferior wall?
One of the three augmented leads, aVF, measures the voltage differential with a positive electrode inferior to the heart (LL) and uses the RA and LA electrodes as their negative ends. AVR and aVL, on the other hand, use the RA and LA electrodes as their respective positive electrodes. Compared to the three normal leads, these augmented leads see the heart from angles that are 60 degrees rotated (I-III). One of the six precordial leads (A), the V1 leads uses six electrodes to provide a horizontal view of the heart.
What may be measured with a digital multimeter's (DMM) continuity mode?
A DMM's continuity mode measures the resistance between two places in an unpowered circuit by emitting a tiny amount of current between them. The DMM will emit a tone to indicate a connection if it detects a low resistance
In which of the following scenarios is a device fault more likely to occur than a use mistake?
A physical component or the network itself is probably failing if data cannot be received over the network. An infusion's incorrect configuration is a direct use error. A known-good device's blurry images are similarly likely to be the result of poor application or technique. Electromagnetic fields close to the machine can produce ECG noise, thus they should be conducted away from powerful machinery.
Which of the following MOST accurately describes the hematocrit centrifuge's relative centrifugal force (RFC)?
Hematocrit centrifuges have a speed that is comparable to microcentrifuges. At an RCF of 5000 or higher, which corresponds to the forces produced by hematocrit centrifuges, hematocrit centrifugation separates blood components.
What is being looked at with an opthalmoscope?
The fundus, or interior of the eye, is examined with an ophthalmoscope. The palatine tonsils are found at the back of the throat, the sinuses are cavities found by the nose and above the eye, and the tympanic membrane is found in the ear.
Which of the following current leakage tests does NOT meet IEC or NFPA 99 standards?
Chassis leakage current is an NFPA 99 test, whereas earth leakage current and patient leakage current are IEC standard leakage tests. The IEC or NFPA 99 does not have a standard test for machine leakage current.