Sunday, August 7, 2011

Philips Avalon Wireless Fetal Transducer Repair !!!!!!!!!!

Philips Avalon Fetal Transducers, Smart Transducers Repair -   M2725A, M2726A, M2727A, M2734A, Toco+ M2735A & M2736A   

Philips Avalon cordless Fetal Transducers

Last month, we received a thanking note and a flyer from Averon Bionics stating that they have now developed the capability to repair Philips Avalon wired and wireless fetal transducers M2725A, M2726A, M2727A, M2734A, M2735A and M2736A. Averon Bionics is the first company who stated in writing that they have developed the repair capability for these latest and complex technolgy based fetal transducers and provided couple of references. One of the reference hospital in Florida, we decided to check out as our best friend works there as the Biomed. He confirmed that they had their wireless transducers repaired about 2 months ago and all of them are working perfectly fine exactly as per the OEM specifications. It took almost a month to get back the repaired transducers but it was worth looking at cost savings. He also mentioned they were prepared to send another batch of 25 transducers but the company informed them to send few as they are backed up. Being 100% SMD, multilayer boards and intricate design for disassembly, company is slow in turn around. However the wired transducers M2735A & M2736A are repaired within few days.

In order to minimize failures, the wireless transducers should be inspected for physical damage before every single use on patient. It develops hair line crack in viewing glass for the display when dropped or excessive force is applied. If such a transducer is worn while bathing/shower or used for under water delivery, the water slowly leaks in and causes damage that is not economical to fix. Care should also be observed while docking the transducer or returning to a slot on base station. Excessive push or pulling force on tab causes minute cracks in bottom case and parting line between top-bottom casings looses adhesion creating passage for water to get in. Either use original battery from OEM or rebuild from an outfit that strictly uses OEM cell. There are many cheap cells available but variation in internal impedance, charging voltage (even + or - 0.05V) and other characteristics shortens life span. The transducer is MCU based and programmed as smart charger optimizing to original cell's characteristics. Use of replacement cell often generates more heat and damages the unit permanently over short time usage. There could also be the issue with the safety protection circuit of replacement or rebuilt battery that has non OEM cell.

Wireless transducers should not be left in storage for long time as the battery can not be charged if the voltage depletes below specified level. Whenever battery is replaced or switched, follow OEM instructions strictly and use recommended silicon sealing compound. The Avalon CTS base unit should always be placed in well ventilated area. Once the battery is removed, transducer should be kept in sealed bag, preferably static shielding bag. This is most important as the moisture and dust damage the circuit boards.

Please check out following web links.