Obstetrics - Harmac

Aus Kössler Lehrerlexikon
Zur Navigation springen Zur Suche springen


Nicolet Dopplers offer unmatched accuracy and reliability in fetal heartbeat detection and are the primary selection of most OB/GYNs. Most of our Dopplers offer interchangeable obstetric probes: 2 MHz for bigger girls or later in pregnancy, three MHz as a basic goal probe and a 2 MHz waterproof probe for underwater labor and delivery. Most models also offer vascular probes for monitoring blood flow. Broad-beam technology and a big probe face provide a novel technique of rapidly locating the fatal heartbeat - no need to angle the probe! Exclusive SSD™ know-how ensures the best possible sound. Optional recharger and digital display. Waterproof 2 MHz and vascular probes are also obtainable. The worldwide favourite Doppler. Full-featured system with constructed-in speaker to amplify foetal heartbeat. Complete with all accessories: Headset, rechargeable batteries, recharger, carrying case and audio CD. Waterproof 2 MHz probe and BloodVitals tracker vascular probes are also available. The Pocket-Dop 3 is a helpful assist in detecting pregnancy and monitoring the fetal heartbeat.



The constructed-in speaker amplifies fetal coronary heart sounds to reassure the expectant mom. The Pocket-Dop 3 options interchangeable probes: the 3 MHz probe is for early fetal heartbeat detection and the 2 MHz probe for use in later pregnancy or with larger patients. The small "footprint" of those probes allows them to be easily angled down behind the pubic bone for optimum detection of early fetal heartbeats. A portable, economical ante partum monitor (VersaLab APM or APM2 for twins) for performing non-stress exams. It's a small lightweight (4.1 lbs) APM system featuring an built-in printer. Both displays may be battery or line operated. Set up is easy with particular strip belts, coloration-coded connectors and straightforward-load paper. Total freedom of motion! Perfect within the operating/supply room. One-hand BloodVitals operation - controls are on the probe. Unit stays exterior the sterile discipline. Digital readout with auto-correlation. Recharging stand mounts on a counter, wall, IV pole or roll-stand. Vascular probes are additionally accessible. A Sturdy portable system with simple-to-use controls. Includes digital readout with autocorrelation. Recharging stand mounts on a counter, wall, IV pole or roll-stand. It’s good for semi-everlasting mounting in any examination room. Waterproof 2 MHz probe and vascular probes are additionally obtainable.



Certain constituents in the blood have an effect on the absorption of light at various wavelengths by the blood. Oxyhemoglobin absorbs gentle more strongly in the infrared region than within the purple region, whereas hemoglobin exhibits the reverse conduct. Therefore, highly oxygenated blood with a high focus of oxyhemoglobin and a low focus of hemoglobin will are inclined to have a excessive ratio of optical transmissivity within the pink region to optical transmissivity within the infrared region. These alternating parts are amplified and then segregated by sampling devices working in synchronism with the pink/infrared switching, BloodVitals in order to provide separate signals on separate channels representing the pink and infrared mild transmission of the body construction. After low-cross filtering to take away signal components at or above the switching frequency, every of the separate signals represents a plot of optical transmissivity of the physique structure at a specific wavelength versus time. AC component brought about only by optical absorption by the blood and various on the pulse frequency or heart price of the organism.



Each such signal also includes an invariant or DC element related to different absorption, akin to absorption by tissues other than blood in the physique structure. AC and DC components of those alerts. IR" LED drive 24 are related to LED's 16 and 18 respectively. 26 is organized to actuate LED drives 22 and 24, and therefore LED's 16 and 18, according to a predetermined alternating sequence interspersed with dark intervals. During each such darkish interval, the timing unit 26 deactivates the LED drives and hence deactivates both LED's. Thus, the LED drives and LED's provide alternating purple and infrared illumination, whereas the timing unit periodically interrupts this illumination to supply the dark intervals. 34 can be offered. Preamplification means 34 consists of an operational amplifier 36 defining an inverting enter node 38, an output node forty and a non-inverting input node forty two related to floor. Forty six samples the amplifier output signal at preamplifier output node 40 and supplies a sequence of samples to every signal processing channel.



While LED sixteen is providing crimson light, the amplified sign obtained from preamplifier 34 is routed through swap forty six to pink signal processing channel 48. Conversely, when infrared mild is being emitted by diode 18, the amplified sign is routed to IR sign processing channel 50. During dark intervals, whereas neither diode is operative, the amplified output sign shouldn't be routed to both signal processing channel. Each of signal processing channels forty eight and 50 may include generally typical parts for changing the periodic signal samples supplied by means of change forty six into a substantially continuous, smoothed sign, eliminating spurious elements resulting from the switching process itself and determining the AC and DC components of the smoothed sign. 10 Hz, and is organized to attenuate alerts above that frequency. 52 is linked to each signal processing channels 48 and 50, the microprocessor being organized to receive digital values from the first and second analog to digital converter of each channel.