Respironics 920 Instruction And Service Manual
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Respironics 920 Instruction And Service Manual

Respironics 920 Instruction And Service Manual

Hand held pulse oximeters
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Instruction and Service Manual
Models 920 and 920M
Hand Held Pulse Oximeters

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  • Page 1 Instruction and Service Manual Models 920 and 920M Hand Held Pulse Oximeters...
  • Page 3 Kwun Tong, Kowloon, Hong Kong Telephone: 852-2771-1886 Fax: 852-2770-7557 References to “920” in this manual shall imply Models 920 and 920M. References to “Respironics” in this manual shall imply Respironics, Inc. is a registered trademark of Respironics, Inc. Copyright © 1999 Respironics, Inc. All rights reserved.

  • Page 5: Table Of Contents

    Table of Contents Contraindications, Warnings, and Cautions ..1 II. Unpacking Your Pulse Oximeter ......3 III. Introduction .............. 4 Indications for Use............4 General................ 4 IV. Operating Instructions ..........5 Batteries ..............5 General................ 7 Connecting the Sensors ........7 Turning on the Pulse Oximeter......
  • Page 6 Table VI: Disposable sensor reference.......23 Table VII: Sensor accessory reference.......23 Figures Figure I: Replacing batteries in the 920..... 6 Figure II: Connecting sensors to the 920....7 Figure III: Front view of the 920........8 Figure IV: Rear view of the 920........8 Figure V: Flowchart for setting the printer mode.
  • Page 7 Glossary of Symbols Symbol Definition of Symbol ATTENTION Consult ACCOMPANYING DOCUMENTS Type BF Applied Part: (Patient isolation from electrical shock). Canadian Standards Association Underwriters Laboratories CE Marking indicating conformance to EC directive No. 93/42/EEC concerning medical devices.
  • Page 8 viii...

  • Page 9: Contraindications, Warnings, And Cautions

    Do not operate in an explosive atmosphere. • Do not operate the RESPIRONICS 920 in an MRI environment. • Do not use the 920 in a situation where alarms are required. The 920 and 920M models have no audible alarms. WARNING •...
  • Page 10 Fingernail polish may reduce light transmission and thereby affect SpO accuracy. • The 920 may not work on all patients. If you are unable to achieve stable readings, discontinue use. • The 920 is sensitive and must be repaired by knowledgeable and specially trained personnel only.

  • Page 11: Unpacking Your Pulse Oximeter

    II. Unpacking Your Pulse Oximeter Contact the carrier immediately if the shipping carton for the 920 is damaged. Carefully unpack the instrument and its accessories. Confirm that the items listed below are packed with the 920 Hand Held Pulse Oximeter. The 920/920M shipment includes: •...

  • Page 12: Introduction

    III. Introduction A. Indications for Use The 920 Hand Held Pulse Oximeter is intended to be used for monitoring oxygen saturation and pulse rate for adult, pediatric, and neonatal patients in hospital, ambulatory, home, and EMS environments. The 920 may be used for spot checking and/or continuous monitoring when attended by a healthcare professional.

  • Page 13: Operating Instructions

    These actions may cause the batteries to leak. The 920 Pulse Oximeter is powered by 6 AA Alkaline cells that will typically provide 100 hours of continuous operation. The 920 indicates when the batteries are low by flashing the digital displays once each second.
  • Page 14 IMPORTANT: Insert these two batteries first. Battery Battery Orientation Door Figure I: Replacing batteries in the 920.

  • Page 15: General

    Pulse Rate displays. 1. Connecting the Sensors Connect the sensor to its 9-pin mating jack on the top of the 920 as shown in Figure II. To select a sensor type, refer to Section VI (A). If additional cable length is necessary, connect the Model 927 Patient Cable between the sensor and the 920 Pulse Oximeter.
  • Page 16 Digital Display Digital Display Percent Oxygen Heart Rate Saturation Perfusion Light On Switch Display Brightness And Setup Mode Off Switch Figure III: Front view of the 920. Serial Number Battery Orientation Battery Door Figure IV: Rear view of the 920.

  • Page 17: Verifying Operation

    Do not use caustic or abrasive cleaning agents. The 920 Pulse Oximeter may be cleaned with a mild detergent and a soft cloth or with an isopropyl alcohol wipe. Allow enough time for the 920 to dry thoroughly before reusing.

  • Page 18: Features

    V. Features A. Controls All functions of the 920 are controlled by switches found on the front of the unit. Refer to Figure III for an illustration of these switches. 1. Power Pressing the ON switch (“”) causes power to be applied to all internal circuitry.

  • Page 19: Setup Mode

    I. This process is continued until all parameters are set. The settings can be easily checked, since the first value displayed for each parameter represents the current setting. When the setting sequence has been completed, the 920 exits the setup mode and begins normal operation. Sequence...
  • Page 20 Display Display Setup Default Mode Setting Press Press Increment printer mode Press Press Proceed to calendar setup Figure V: Flowchart for setting the printer mode. Printer Seconds Minimum Touch Mode per data print point printed?* capability?** * For modes where the minimum SpO data is written, there are two lines of data written for each data output.

  • Page 21: Calendar Settings

    The day may be set to “01” through “31”. Refer to Figure VI for a flowchart of setting the calendar. When the calendar setting sequence has been completed, the 920 continues to the clock settings (refer to section c. of this section).

  • Page 22: Clock Settings

    c. Clock Settings After the calendar settings have been determined in the setup mode, “ ” will appear in the SpO display indicating clock setup mode for the hour. The hour may be set to “00” through “23”. After selecting the hour, the display will show “ ”...

  • Page 23: Displays

    Green indicates the pulse waveform signal is of good quality and SpO data is accurate. • The 920 may interpret motion artifact of CAUTION sufficient amplitude and regularity as good perfusion (green).

  • Page 24: Flashing Display

    Flashing Display The numerical displays will flash once each second if the 920 determines that a battery low condition exists. Replace all six batteries immediately. NOTE: Inaccurate SpO and/or pulse rate measurement may result if the 920 is operated in a low battery condition.

  • Page 25: Printer/Serial Output

    Detector Cathode, +5 V Table III: Printer/Sensor interface assignments. The information from the 920 in the real-time mode is sent in an ASCII serial format at 9600 baud with 9 data bits, 1 start bit, and 1 stop bit, odd parity. The data is output at a rate of once per second.

  • Page 26: Memory Option (920M Only)

    D. Memory Option (920M only) The memory option is identified by the “M” in the model number (i.e., 920M as opposed to the 920). This model number is located just above the serial number on the back of the unit. The 920M Pulse Oximeter can collect and store up to eighteen hours of SpO and pulse rate information.

  • Page 27: Memory Output Mode

    2. Memory Output Mode To output the data stored in the memory of the 920M, start with the unit OFF and then: Hold the “ñ” switch while pressing the “” switch; Release the “ñ” and “” switches when “888 888” is displayed in the SpO and pulse rate LEDs;...
  • Page 28 920M Memory Data Format CHECK DATA 1 DATA 2 SUM** NOTE Header of first file month Current time year Minute second Hour month Stop time of first file saved year Minute in memory second Hour month Start time of first file saved year Minute in memory...

  • Page 29: Pulse Oximeter Sensors

    Respironics sensors do not contain natural rubber latex. A. General Sensor Description The 920 features sensors which are ideal for nearly every application. Refer to Tables V and VI for a complete list of Respironics sensors and specific information on each sensor. Each sensor is designed for a specific site application and specific patient size and weight range.
  • Page 30 They are not recommended for applications where the best possible SpO accuracy is important. The reusable sensors must be secured to the NOTE: ® patient using either Velcro -type straps or medical tapes. Respironics Tape Strips or Hydrogel Tape Strips are recommended to stabilize the reusable sensors.
  • Page 31 Respironics Disposable Sensor Reference Sensor Respironics Patient Preferred Application Description Model Weight Application Number Range • Adult 953D greater than 30 kg Index, extended ® Flexi-Form (greater than 66 lb.) middle, or monitoring • ring finger self-adhesive • motion situations •...

  • Page 32: Finger Clip Sensors

    Finger Clip Sensors NOTE: For the best results, secure the sensor cable independently from the sensor, preferably around the base of the finger. Make sure that the tape securing the cable does not restrict the blood flow. NOTE: If the patient's finger is too small or the sensor is not adjusted properly, light may bypass the tissue and result in SpO inaccuracies.

  • Page 33: Flex Sensors

    C. Flex Sensors NOTE: For optimum light transmission, attach the sensor on the finger or toe. For best results, secure the cable independently from the sensor. Make sure that the tape securing the cable does not restrict the blood flow. NOTE: Ensure sensor placement is positioned such that no stray light bypasses the tissue or SpO...

  • Page 34: Infant Flex Sensor

    2. Infant Flex Sensor The preferred sensor site for infants is on the NOTE: big toe. This placement provides increased light transmission compared to the foot placement. Refer to Table V for approximate size requirements for infant sensors. The Infant Flex Sensor is designed for continuous monitoring of infants where finger tip monitoring is impractical.

  • Page 35: Ear Clip And Reflectance Sensors

    Attach the sensor by wrapping the tape or sensor wrap over the sensor assembly snugly, but not so tight as to restrict blood flow. For best results, secure cable independently from the sensor, preferably around patient's ankle or lower leg. Make sure the tape securing the cable does not restrict blood flow.

  • Page 36: Reflectance Sensor

    2. Reflectance Sensor The Reflectance Sensor is for use on well-vascularized skin surfaces. For adults, this will usually be the center of the forehead slightly above and between the eyebrows. The Sensor Holder provides the precise pressure this sensor needs against the skin.
  • Page 37 No tape over nail Step 2: Place the patient's finger or toe in the sensor with the nail side up and the tip of the finger or toe centered against the center line marked on the sensor as illustrated. This will ensure vertical alignment between the emitter and detector.

  • Page 38: Infant And Neonatal Disposable Sensors

    • Check application site frequently to determine circulation, positioning, and skin sensitivity of the patient. Each patient's sensitivity to Respironics sensors may vary depending on their medical status or the condition of their skin. 1. Infant Flexi-Form Sensor ®...

  • Page 39: Neonatal Flexi-Form Sensor

    Bottom Figure XVI: Infant Flexi-Form Sensor. Step 3: Wrap the tape around the toe taking care to ensure that the detector and emitter are vertically aligned as illustrated by the dotted axis line. 2. Neonatal Flexi-Form Sensor ® The preferred application site for the Neonatal Flexi-Form Sensor is the outstep of the foot, close to the toes for neonates.
  • Page 40 Step 3: Wrap the tape on top and bottom as illustrated. Figure XVII: Neonatal Flexi-Form Sensor. Step 4: Ensure that the detector and emitter are vertically aligned as illustrated by the dotted axis line.

  • Page 41: Cleaning The Sensors

    Do not use caustic or abrasive cleaning agents. Carefully clean the Respironics reusable sensors with an isopropyl alcohol wipe and ensure that all tape residue is removed. Allow enough time for the sensor to dry thoroughly before reusing. The sensors may be sterilized using ethylene oxide (EtO) (cold cycle).

  • Page 42: Theory Of Operation

    If the dysfunctional hemoglobin is carboxyhemoglobin or methemoglobin, then the difference between the oxygen saturation value displayed by the 920 and the oxygen saturation values determined by the laboratory instrument will be greater as the dysfunctional hemoglobin levels rise approximately in...
  • Page 43 Hb + COHb + MetHb = 100 x O Hb /(100 - COHb - MetHb) Where: = Respironics 920 determined and displayed oxygen saturation in percent Hb = Fractional oxyhemoglobin saturation in percent COHb = Carboxyhemoglobin saturation in percent MetHb = Methemoglobin saturation in percent...

  • Page 44: Specifications

    VIII. Specifications 0 to 100% 1. Oxygen Saturation Range (SpO 18 to 300 Pulses Per Minute 2. Pulse Rate Range 3. Displays Patient Indicator Perfusion LED Digital Displays 3-digit 7-segment LEDs 4. Measurement Wavelengths 660 nanometers 910 nanometers Infrared 5. Accuracy 70 to 100% ±...
  • Page 45 6. Temperature -20 to +50 °C Operating -30 to +50 °C Non-operating 7. Humidity 10 to 90% non-condensing Operating Non-operating 10 to 95% non-condensing 8. Power Requirements 6 AA alkaline batteries 100 hours typical operation (maximum display brightness) 200 hours typical operation (minimum display brightness) 9.

  • Page 46: Service

    Respironics does not recommend field repair of the 920 Hand Held Pulse Oximeter. The circuit board in the 920 series is a multi- layer board using traces 0.01” wide. Due to the very small trace size, extreme care must be used when replacing components to prevent permanent non-repairable damage to the circuit board.

  • Page 47: Warranty

    Respironics shall repair all systems found to be defective in accordance with this warranty, free of charge, for which Respironics has been notified by the purchaser by serial number that there is a defect, provided said notification occurs within the applicable warranty period.

  • Page 48: Accessories

    XI. Accessories The following Respironics accessories function with the Model 920 Hand Held Pulse Oximeter: Model Pulse Oximeters and Printer One 920 Hand Held Pulse Oximeter; Adult Articulated Finger Clip Sensor (Model 936); and Instruction and Service Manual (Model 924); Six AA Alkaline Batteries 920M One 920M Hand Held Pulse Oximeter with 18-Hour Memory;...
  • Page 49 Nonin Medical, Inc. For further information about Respironics parts and accessories contact your local distributor. If you do not have your local distributor information, call Respironics and ask for your local distributor's name and phone number.

  • Page 50: Troubleshooting Guide

    SpO Sensor may have connected to the 920 display become dislodged and the patient correctly; from 920 or from the Try a new sensor if patient condition persists Segments of Defective LED displays Displayed values may or ♥ display not be reliable;...
  • Page 51 Troubleshooting Guide (continued) Symptom Possible Cause Possible Solution Erratic ♥ display ESU may be Examine the patient: interfering with move oximeter, and/or yellow oximeter performance perfusion LED cables, and sensor as far away from ESU as during possible or refer to the concurrent use of electrosurgical ESU operator's...
  • Page 52 Printer mode did not Reset pulse oximeter printing out after get updated internally by turning it off and changing Prn then on mode If any of these solutions do not correct the problem with your 920, please contact Respironics Technical Support.

This manual is also suitable for:

920m

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