811-B ULTRASONIC FLOW DETECTOR

1 1811-B ULTRASONIC FLOW DETECTORM odel 811-B Operating ManualM0811-B, MANUAL 0197 TYPE B EQUIPMENT Copyright November 12, 1999 This device meets or exceeds the international standards listed below:EN 60601-1-1 Electrical Safety, Labeling, 60601-1-2 ESD, Radiated Immunity, EFT/Burst Immunity, Fast 55011 Class BConducted Emissions, Radiated : This equipment should not be used with a device cannot be used while connected to a device is battery operated and uses a 12 V, Ah, sealed lead acid battery for its power source. Medical Electronics, ULTRASONIC FLOW DETECTORDECLARATION OF CONFORMITYP roduct Designation: Blood Flow detectors Blood Flow MetersType(s), Model(s)611-Series1050-Series614-Series1 051-Series641-Series1052-Series841-Serie s1059-Series811-Series 806-Series915-Series2100-Series AccessoriesPencil ProbesAdult Flat ProbesInfant ProbesPrecordial ProbesObstetrical ProbesWe hereby declare that the above mentioned products meet the provisions of theEC Directive 93/42/EEC which apply to them, as stated in Annex II of this declaration is based on :Certification of a Quality System:Certificate # HD 9910392 Issued by TUV Rheinland Product Safety GmbHDate: :Aloha, OR 97007 Date: December 18, 20023811-B ULTRASONIC FLOW DETECTORM odel 811-B Operating ManualM0811-B, MHz, Parks part # Pencil Probe: Optional - MHz, Parks part # Flat Probe:Optional - MHz, Parks part # Flat Probe.

2 Optional - MHz, Parks part # Speaker:Speaker disconnects when headphones are pugged :Acquire locally. Low-impedance stereo headphones, rated 8 :20 :8 kg with :12 V, Ah, sealed lead acid part # EUROPE LTD, part # A, SLOW fuse, PARKS part # requirements: Acquire charger external battery charger should supply 16 V ac, 250 battery charger must comply with the relevant national standards.(EN60601-1:1990+A1:1993+A2:199 5)ENVIRONMENTAL CONDITIONS FOR TRANSPORT AND STORAGE (601-1)Ambient temperature: Range, -40 C to +70 humidity:10% to 100%, including Pressure: Range, 500 hPa to 1060 CONDITIONSIPXO rating:Degree of protection against ingress of water .. none range:10 C to 40 ULTRASONIC FLOW DETECTOR ELECTRICAL WARNINGM isuse of this equipment and inappropriate electrical connections will createa shock appears to be simple connections to other equipment can put the patient and/or the operator atrisk of electrical shock. FOLLOW THE MANUAL INSTRUCTIONS ON THE USE OF THISEQUIPMENT.

3 Avoid use involving electrical contact with other equipment. We assume no responsibilityfor misuse of our following is a guide to avoiding common potential hazards, this is NOT comprehensive. Alwaysseek the advice of a qualified Bio-engineer BEFORE making any electrical WHILE THE BATTERY IS BEING CHARGED IT IS DISCONNECTED FROM THE the charging circuit is active. The Doppler won't work. This is a safety feature to preventpossible electrical shock to the battery charger must comply with the relevant national requirements ( EN60601-1:1990+A1:1993+A2:1995). The battery charging input circuitry must not be modified or altered in the equipment is not intended to allow operation on a patient while being charged and anymodification altering this will no longer comply with the tested NOT operate this instrument from other than its own self-contained CONNECTING TO A HI-FI OR INTERCOM SYSTEM: A medical-grade isolation transformer orcompletely isolated battery operation is the safest means of connecting HI-FI or intercom qualified technician or Bio-engineer should review all proposed OPERATION IN THE PRESENCE OF FLAMMABLE MATERIALS OR HIGH OXYGENCONCENTRATIONS: The possibility of explosion or fire always exists when this equipment isused in such an PATIENT BURNS: In surgery these may occur through the probe when the Doppler is grounded(perhaps through an pole) and the electrocautery backplate has inadvertently not beenconnected.

4 To protect against this ensure the cautery ground plate is on and only suspend theDoppler with an WARNING: This equipment should not be used with a defibrillator. SAFETY IS YOUR RESPONSIBILITY. IF IN DOUBT, SEEK EXPERT ULTRASONIC FLOW DETECTORM odel 811-B Operating ManualM0811-B, DESCRIPTIONOFF/ONThis switch turns the instrument off and POWER lamp will go on when theunit is turned on. This lamp will blink ifthe battery needs charging. Although itwill operate for a few more hours, it shouldbe recharged as soon as JACKThe external battery charger plugs intothis jack. The charger must also beplugged into an appropriate alternatingcurrent outlet. The charger should supply16 V ac, 50-60 cycle at 250 battery is charging if the lamp bythe charger jack is illuminated. Whilethe battery is being charged it isdisconnected from the Doppler, whichmeans the Doppler won't work. Only thecharging circuit is active.

5 This is a safetyfeature to prevent possible electrical shockto the battery cannot be recommend you put this unit oncharge at the end of every work day. Youwill get longer, more reliable servicefrom the battery. Leaving the batterydischarged for days will shorten the lifeof the battery. You can expect a life oftwo to three years for the battery withnormal service and you believe the battery is getting weak,keep the volume low or use headphonesto get the maximum Doppler operatingtime before recharging or replacing knob controls the JACKWhen the optional stereo headphones areplugged in the speaker is disconnected, sothe sound is heard only through theheadphones. You always hear more,especially when you are checking weakflow or veins, through low MHZ PROBE JACKSThe probe is connected to two jacks. Itdoesn't matter which side of the probeis connected to which jack. Theinstrument is marked with the frequencynumber of the Doppler ( ).

6 The probeyou use must match this number. Thefrequency is engraved on the probebody. When ordering new probes, besure to order this instrument can be used with thestandard 10 mm diameter pencil probe,the skinny pencil probe ( mm ), theinfant flat and the adult flat instrument is designed only forvascular work, not obstetrical ULTRASONIC FLOW DETECTORTHE DOPPLER EFFECTIn vascular testing the Doppler effect describes the change in frequency that occurs when a transmittedenergy reflects from a moving formula describes the Doppler phenomenon: 2 FtV (COS ) CWhere: F = The difference between Doppler probe frequency transmitted and the frequency = Two times the transmitting frequency of the Doppler = Velocity of insonated object (red blood cells). (theta) = The angle of incidence between the ultrasound beam and the blood = A constant which is equal to the velocity of ultrasound in tissue (1540 m/sec).The formula appears intimidating but its principle is easy.

7 It merely states that if you direct a soundbeam at a moving object (here the Doppler ultrasound beam points at moving blood cells) thatobject s movement alters the frequency of the reflected sound beam. Blood cells moving towardthe transmitter add their velocity to the signal causing the reflected signal to be a higher frequencythan the transmitted frequency. Conversely, blood cells moving away from the transmitter subtracttheir velocity from the transmitted signal causing the reflected signal to be lower in frequency. Thegreater the velocity of the blood cells either toward or away from the transmitter the greater thefrequency change that occurs. The signal that you listen to during Doppler testing is the differencebetween the transmitted and the received signal. The Doppler testing device compares the receivedsignal s frequency to the transmission frequency and then outputs the difference between the two signalseither to a recording device or to speakers or testing uses two basic Doppler types: continuous wave ( ) and pulsed.

8 Most Dopplersuse two piezoelectric crystals (see note below), one continually transmitting and one continually Dopplers use a single crystal which alternates between transmitting and receiving. Each typehas unique advantages. Dopplers provide greater signal resolution and frequency Dopplers (because of signal timing) allow more accurate determination of vessel depth. Becausesignal quality is usually more important than vessel depth information in non-invasive vascular testing theDopplers used on PARKS equipment are continuous : Piezoelectric crystals change thickness rapidly when a high frequencyelectric current passes through them, resulting in the production of sound they are struck by sound waves reflected from the moving blood cells theyconvert the sound energy into electric Doppler unit transmits at a set frequency and listens for the returning echo. By comparingthe frequency of the echo to the transmitted frequency, the Doppler determines forward orreverse flow, flow velocity (angle dependent) and the magnitude of the are many elements that interplay to determine some of the values mentioned abovebut for everyday testing all you need to remember is that if the reflected signal is a higherfrequency than the transmitted frequency it is usually associated with forward blood flow (flowtowards the probe) and if it is a lower frequency it is reverse flow (flow away from the probe).

9 On a strip chart recorder or on a scope, forward flow usually appears as an upward deflectionof the trace while reverse flow appears as a downward can use Dopplers for both arterial and venous examinations. In arterial studies youcompare the waveforms to known normals to establish a diagnosis. With venous studies,recording the Doppler signal yields little useful information. Venous Doppler studies rely heavilyon the experience of the technologist to listen to and evaluate flow characteristics and theyare the most subjective of the non-invasive examinations. In both arterial and venous teststhe examination techniques are similar for the upper and lower you should use a high frequency Doppler for high flow, relatively shallow a low frequency Doppler for deeper vessels. F =7811-B ULTRASONIC FLOW DETECTORM odel 811-B Operating ManualM0811-B, THIS!INFORMATION CONTAINED IN THIS OPERATING MANUAL ISPROVIDED TO HELP THE USER OPERATE THE INSTRUMENTCONTROLS.

10 IN NO WAY MUST A DIAGNOSIS BE MADE ON THEBASIS OF INFORMATION PROVIDED IN THE MANUAL. WE PROVIDEPROCEDURES WHICH WE BELIEVE TO BE IN CURRENT , THE PROCEDURE TO BE USED AND THE DIAGNOSISOF AN INDIVIDUAL PATIENT MUST BE DETERMINED BY THEATTENDING PHYSICIAN FROM INFORMATION IN THE SCIENTIFICLITERATURE AND FROM OTHER MEDICAL ULTRASONIC FLOW DETECTORBASICSPROBE POSITIONINGPROPER PROBE PLACEMENT AND PROPER USE OF GEL ARE VERY IMPORTANT!In vascular testing the ideal Doppler angle would be to have the probe pointing right down the vessellumen. Since such a practice is impractical in normal testing a compromise exists. Hold the probe ata 45 to 60 degree angle from the skin line with the probe tip pointing cephalad (toward the head). Aswith all guidelines this is not a hard and fast rule. You must still search for the best quality position alters waveform morphology. You cannot make an abnormal signal appear normal byrepositioning the probe but you can make a normal signal appear abnormal by incorrect probe must be very careful about probe pressure, because a slight amount of pressure againstthe skin can occlude the NOT point the ULTRASONIC beam into the retina of the RED PROTECTIVE COVER MUST BE REMOVED FROM THE PROBE BEFORE USEYOU MUST USE GEL IN FRONT OF THE PROBEWe recommend you use a coupling gel made especially for ULTRASONIC physical therapyequipment.