Carriage works dental surgery Videos

+Holly Crofton Saturation may come from the IGBTs on top of the HV tank. During the generator calibration you check and adjust the dead time. There is a set technique maybe 40kv and .2mA, anyway during fluoro you look at the high frequency firing of the IGBTs. It needs to be short enough for correct output but cannot be too short (less than 1.5 micro seconds) or the 2 sets will conduct at the same time. If that happens there might be a loud bang and you will need the check book. (It cannot be too long either) Read and understand the directions if unsure.Since you are calibrating with an O-scope increase the time to see many pulses and that none are missing. There are 4 test points for this; I only have a 2 channel scope so I have to do this twice. Always check the sticks for arc marks, (all 4 ends), low voltages.Hot? if it is the anode temp then you can look in the patient dose summary and see if they were on it too long.Like Kelvin said it can be just what they were doing during the procedure. Filters do get plugged with lint. If they bag the tube it may not breath enough. Even the fuse for the tube fan can give up, I have gotten a wire into the fan during reassembly once and stopped it from turning.If you do the 10R/min and 20R/min test and calibration you may get the Anode Warm/Hot message depending how fast you are. Good Luck

Typically when you get this type of message, it means the x-ray tube is getting hot.  It usually comes on when the tube has reached 50-75% tube heat capacity.  For obvious reason we do not want to overheat the tube.  On some of the OEC C-arms, there is a fan and vent on the tube end which will used for cooling.  It could also blow out the hot air and potentially burn any user near that vent.  I've never seen this happen but it is possible.  Normally the C-Arm would prevent or stop any fluoro until the tube has cooled down as well.So, when you start seeing tube overheat warnings or alerts or even tube WARM, you should consider minimizing the use of the fluoro until the message has gone away.  you could also use single shots if permitted.  If constant fluoro is still required, considering using pulse modes (and choose a pulse per second (PPS) that works well for the situation).  Essentially you need to slow down the tube heating by reducing the amount of fluoro time or even taking a break (for you, patient, doctor and the machine :) )  if possible.  Now I''m pretty positive that you're getting these warnings when using a combination of digital subtraction and fluoro for special procedures.  The trick really is to limit the about of digital subtraction and use the fluoro as much as possible.  If you haven't noticed already, under digital subtraction runs, the mA on the C-Arm can soar up to 125mA!  Normal fluoro is roughly 1-6mA.  Digital subtraction runs are many times the major heat generator and long fluoro times/runs can do so too.