ballistocardiograph, cardiograph - a medical instrument that measures the mechanical force of cardiac contractions and the amount of blood passing through the heart during a specified period by measuring the recoil of the body as blood is pumped from the ventricles

bronchoscope - a slender tubular instrument used to examine the bronchial tubes

cardiograph, electrocardiograph - medical instrument that records electric currents associated with contractions of the heart

dialysis machine, dialyzer - a medical instrument for separating substances in solution by unequal diffusion through semipermeable membranes

diathermy machine - a medical instrument for local heating of bodily tissues for medical purposes

electroencephalograph - medical instrument that records electric currents generated by the brain

electromyograph - a medical instrument that records the electrical waves associated with the activity of skeletal muscles

endoscope - a long slender medical instrument for examining the interior of a bodily organ or performing minor surgery

fiberscope - a flexible medical instrument involving fiber optics that is used to examine internal organs

instrument - a device that requires skill for proper use

keratoscope - medical instrument to examine the cornea in order to detect irregularities in its anterior surface

laryngoscope - a medical instrument for examining the larynx

ophthalmoscope - medical instrument for examining the retina of the eye

otoscope - medical instrument consisting of a magnifying lens and light; used for examining the external ear (the auditory meatus and especially the tympanic membrane)

polygraph - a medical instrument that records several physiological processes simultaneously (e.g., pulse rate and blood pressure and respiration and perspiration)

rhinoscope - medical instrument consisting of a mirror mounted at an angle on a rod; used to examine the nasal passages (through the nasopharynx)

speculum - a medical instrument for dilating a bodily passage or cavity in order to examine the interior

stethoscope - a medical instrument for listening to the sounds generated inside the body

surgical instrument - a medical instrument used in surgery

syringe - a medical instrument used to inject or withdraw fluids

thermograph - medical instrument that uses an infrared camera to reveal temperature variations on the surface of the body