Transducers (Medical Applications)
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1 Transducers (Medical Applications)
2 Sensor Technologies Pressure Force / Load Cell Vibration / Acceleration Humidity Temperature / Thermopile Optical /SpO 2 Position (LVDT, Encoders) Tilt Magneto Resistive (MR) Piezo Film
3 Sensor Technologies Pressure - Piezoresistive MEMS pressure transducer - Silicon bonded strain gage - Foil-bonded strain gage
4 Sensor Technologies Temperature IR Thermopile sensors Single element or Array Magneto Resistive Magnetic field Angle Position Flow Heated elements Bi-directional
5 Sensor Technologies Force Microfused strain gage Piezoelectric polymer (impact) Humidity Capacitive thin film SpO 2 Photo optic Tilt Capacitive/resistive fluid
6 Sensor Technologies Piezo Film Flexible film Strain gage Vibration/Acceleration Piezoresistive MEMS Capacitive MEMS Piezoelectric polymer Cantilever beams Position Electromagnetic sensors Magnetic and optical encoders Piezoelectric polymer ultrasound
7 Cardiovascular Monitoring / Diagnosis / Treatment
8 Disposable Blood Pressure Sensors Piezoresistive MEMS pressure sensor Surgical procedure, ICU Replace 1-3 days Low cost, high volume capability Value add capability AAMI compliant Tape and Reel ETO, E-beam, Gamma
9 Blood Pressure Cuff Sensors Piezoresistive MEMS pressure sensor Low cost, high volume
10 Cardiac Activity Monitor - Pacemaker Miniature Piezoelectric film sensor measures patient s activity level and adjusts Pacemaker function Highly sensitive and reliable Biologically inert material Cantilever beam sensor (6.35mm in length) Pacemaker
11 Defibrillator Piezoelectric film sensor detects the heart rhythm Can save all the events in memory Data can be hand carried to the doctor Designed to activate cell phone for medical emergency
12 Blood Separation and Transfusion MEMS stainless steel pressure sensor to measure amount of blood taken out and induced. High reliability Non disposable
13 Angioplasty Inflation Pump MEMS pressure sensor and digital display in a pump Pump is used to inflate and deflate the angioplasty balloon
14 Angioplasty Disposable Blood Pressure sensors are used to design an improved contrast delivery system. This will minimize the contrast fluid intake. Response will be quicker due to reduced dead volume Strain gage pressure sensor measures pressure levels of cryogenic gases used in novel angioplasty procedures.
15 Surgical / Delivery
16 Intra-uterine Fetal Monitoring Piezoresistive MEMS pressure sensor Fetal activity Monitoring Contraction pressure and frequency High volume, low cost Disposable Value add capability ETO, Gamma & E-beam
17 Body Heat Exchange Piezoresistive MEMS pressure sensor Partial vacuum expands blood vessels for quick heat exchange.
18 Kidney Transporter MEMS Disposable blood pressure sensor can be used to monitor the fluid flow in the organs to extend the life of the organ during transportation.
19 Disposable Display Sensor Piezoresistive MEMS pressure sensor and digital display used to measure pressure in the knee during surgery Disposable Low cost
20 Baby Delivery System Piezoresistive MEMS pressure sensor monitors pressure on vacuum-assist baby delivery system
21 Patient Monitoring / Diagnosis
22 Vital Signs Monitoring Breathing patterns and heart rate Patient weight Patient leaving bed Bed tilt Body temperature Blood oxygen levels
23 Body and Skin Temperature Thermopile Sensor Distance-Ring 5-25 mm Optic Tympanum Generation 1 Generation 2 Generation 3
24 Sleep Apnea Patch Piezoelectric film used to detect Obstructive Sleep Apnea (brief Interruption in breathing during sleep) Multiple sensing methods: Dynamic strain gage sensing chest movement Contact microphone sensing snoring Pyroelectric sensor monitoring exhalation
25 Parkinson s & Premature Baby Miniature sensors for Parkinson s tremor study Humidity control of airflow for optimized, safe ambiance
26 Spirometer T amb -Sensor 2 Heaters Air Flow MAFS-Chip LMM-02 is sensitive & fast Designed for bidirectional measurement
27 SpO2 Sensors Disposables and non disposables Measures pulse rate and oxygen levels in the blood
28 Skin Thickness Measurement Ultrasonic echoes from bicep (Piezo film) Significant echo results from muscle, approx 7.5mm below skin Echo amplitude, location and duration change with arm and muscle position Low-cost, disposable sensor
29 Charge amp (V, 10 mv/pc) Breathing/Pulse Monitoring in Bed Piezo cable sensor mat Detects vibration through foam mattress. Respiration and heart beat signals can be detected. 0.1 Cable mat under foam mattress Time (s)
30 Charge amp o/p (V) Oxygen Mask Breath Monitoring Pyro effect of Piezo film detects respiration: High output signals Small, unobtrusive piezo film sensor design Low cost, disposable sensor 3 Oxygen mask sensor (pyroelectric) Time (s)
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Heart Circulatory System 25 26 Prof. Dr. med. Walter Eichinger Department for Cardiac Surgery > Bogenhausen Hospital Englschalkinger Straße 77 81925 München Phone +49 89 9270-2630 walter.eichinger@klinikum-muenchen.de