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Related Manuals for LORECa Hearing Instrument PKA 84
Summary of Contents for LORECa Hearing Instrument PKA 84
- Page 1 PKA 84 PEDIATRIC AUDIOMETER User Manual OCTOBER 5, 2016...
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Page 3: Table Of Contents
Table of Contents Table of Contents ............................1 Introduction..............................2 Intended Use ..............................2 Precautions..............................3 Basic Functions............................5 Description of Control Panel.........................5 Description of Stimuli Panel .........................6 Auditory Behaviour ...........................7 Auditory Behaviour -Test Overview......................7 Description of Various Tests ........................8 Auditory Behaviour Index for Infants ......................10 Reflex Audiometry by Neonates.........................11 Maturation of Auditory Response.......................12 Technical Specifications..........................14... -
Page 4: Introduction
Introduction Introduction Intended Use The PKA handheld pediatric screening audiometer is designed to be a device for screening for hearing loss primarily amongst children. Output and specificity of this type of device are based on the test characteristics defined by the user, and may vary depending on environmental and operating conditions. -
Page 5: Precautions
Precaution Notice - Be sure to use only stimulation intensities, which will be acceptable for the patient. Notice - The transducers (headphones, bone conductor, etc.) supplied with the instrument are calibrated to this instrument - exchange of transducers require a recalibration. Notice - It is recommended that parts which are in direct contact with the patient (e.g. - Page 6 Notice - Within the European Union it is illegal to dispose electric and electronic waste as unsorted municipal waste. Electric and electronic waste may contain hazardous substances and therefore has to be collected separately. Such products will be marked with the crossed-out wheeled bin shown below.
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Page 7: Basic Functions
Basic Functions Description of Control Panel Selected intensity LCD Selected frequency LCD LEDs which present feeding of STD device and the selected stimulus Tone, NBN or WN. Touch buttons to increase and decrease the stimuli frequency 0.5, 1, 2, 3, 4 KHz Touch buttons to increase and decrease the stimuli intensity, between 20 to 80 db for stimuli Tone in steps of 10 db and 20 to 70 dB for noise stimuli, with distances on the device. -
Page 8: Description Of Stimuli Panel
Description of Stimuli Panel The loudspeaker is under the white grid. The grid is positioned in a distance of 50cm from the ear. 3 LEDs arranged in a triangle for conditioning of the orientation reflex in a ring Connector for single headphone TDH39S (optional) When the headphone is connected to PKA, correct calibration for Pure Tone Audiometry with TDH 39S will automatically be applied. -
Page 9: Auditory Behaviour
Auditory Behavior Auditory Behaviour -Test Overview Waking Respiration. Recommended age 0 - 3 0 - 4 0 - 12 4 - 15 6 - 30 group (month) Preferred Frequency: × × 500 Hz × × 1000 Hz × × × ×... -
Page 10: Description Of Various Tests
Description of Various Tests As found by Professor Sanford E. Gerber complex signals like White Noise (WN) assure better responsiveness on neonates and up to the age of approximately seven months than e.g. pure tones and Narrow Band Noise. Therefore PKA has the possibility of stimulating with WN. The APR Test: The Auropalpebral Reflex is a startle reflex of the eyelid elicited by relatively strong sounds, approximately 80 - 100 dB SPL (PKA is calibrated in dB HL). - Page 11 The VRA Test: The Paediatric Audiometer PKA can perform the Visual Reinforcement Audiometry (Liden and Kankunen, 1969), which is an extension and modification of COR, where the co-operation with the child is less important. Liden and Kankunen accept not only the sound localisation orientation reflex, but also four other reactions: reflex reactions (body and face), search reactions, orientation reactions and spontaneous reactions.
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Page 12: Auditory Behaviour Index For Infants
Auditory Behaviour Index for Infants Reaction on Reaction Reaction noisemaker on warbled Expected on Speech (approx. pure tones Response (dB HL) dB SPL) (dB HL) Eye-widening, eye-blink, 0–6 weeks 50-70 dB 78 dB(±6) 40-60 dB stirring or arousal from sleep, startle. Eye-widening, eye-shift, eye blink, quieting:... -
Page 13: Reflex Audiometry By Neonates
Reflex Audiometry by Neonates The reflex pattern elicited by sound can be divided into the following types of reflexes (Relke and Frey 1966). The sound intensity is 75 – 90dB. Breathing Reflex The breathing rhythm is changing when the sound is heard and should stabilise after 5-10 seconds. -
Page 14: Maturation Of Auditory Response
Maturation of Auditory Response Newborn to 2 months of age Arousal from sleep. MRL2 in quiet surroundings 50-70 dB. MRL in noisy surroundings: 90 2 Minimum response level, dB HL. The MRL levels are recorded in sound cabins. In noisy surroundings the levels will have to be correspondingly higher months of age Rudimentary head turn,... - Page 15 9-13 months of Sound localisation to the side and direct below. MRL: 25-35 dB. 13-16 months of age Sound localisation to the side, below and indirect above. MRL: 25-35 dB. 16-21 months of age Direct sound localisation to the side, below, indirect above.
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Page 16: Technical Specifications
Technical Specifications Standards: Audiometer: EN 60645-1, Type 5 Sound Pressure Level of the loudspeaker: ISO 389-7 Sound Pressure Level of the headphone: ISO 389-1 EMC: EN 60601-1-2 Frequencies: 500, 1000, 2000, 3000, 4000 Hz. Stimuli: Warble Tone, NB, and WN. Intensities: Distance 50 cm: 30 –... - Page 17 Stimulation using TDH39S: Pure Tone: 500, 1000, 2000, 3000 and 4000 Hz. Intensities of 30 – 80 dB (independent calibration applied when TDH39S is connected). Sound Source: Built-in loudspeaker or audiometric headphone TDH39S (independent calibration registers). Light Stimulation: 3 LED’s arranged in a triangle, flash speed 5 Hz (5 pulses per sec). Tone and Light Stimulation: Silent presentation switch.
- Page 18 Environmental conditions: The specification for the instrument is valid if the instrument is operated within the following environmental limits: Temperature: 15°C to 35 °C. Humidity: 30 %RH to 90 %RH Transportation and storage of the instrument should be within the following environmental conditions: Temperature: Transportation: -20°...
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Page 19: Unpacking / Inspection
Unpacking / Inspection Check box and contents for damage: When the instrument has been received, please check the shipping box for rough handling and damage. If the box is damaged, it should be kept, until the contents of the shipment have been checked mechanically and electrically. -
Page 20: Reporting Imperfections
Check numbers on PKA and Manual: The identification label on the rear plate holds the serial number. This should be checked with the manual number, and written down for later service claims. Reporting Imperfections Report immediately any faults: The cabinet and the accessories should be checked visually for scratches and missing parts. -
Page 21: Trouble Shooting
Annual Calibration: The PKA has been designed to provide many years of reliable service, but annual calibration is recommended due to possible impact on transducers. We do also recommend to calibrate the PKA , if something drastic happens to the instrument (e.g. if the instrument was dropped on the floor). Trouble shooting PKA does not turn on: ... -
Page 22: Appendix: General Maintenance Procedures
General Maintenance Procedures The performance and safety of the instrument will be kept if the following recommendations for care and maintenance are observed: − It is recommended to let the instrument go through at least one annual overhaul, to ensure that the acoustical, electrical and mechanical properties are correct. -
Page 23: Recommended Literature
Recommended Liferature Jerger, James: Paediatric Audiology, Current Trends McCormick, Barry: Paediatric Audiology 0 – 5 years, Second Edition (Taylor & Francis) Northern, Jerry L. and Downs, Marion P.: Hearing in Children (Williams & Wilkins). Katz, Jack: Handbook of Clinical Audiology, Fourth Edition (Williams & Wilkins). -
Page 24: Return Report
Return Report Hospital/ clinic/ company: …………………………………….. Address: …………………………………… Phone: ………………………. Fax or E-mail: ………………………………………………………………………… Contact person: ………………………………. Date: ………………..………….… Following item is reported for checking: Type….…………….. quantity………….. serial NO…………………………… Return to LORECa for : Calibration……………………………… Repair…………………………………… Exchange………………………………. Other……………………………………. Defections as described below: ………………………………………………. - Page 26 INFO@LORECA.COM...