STUDY DESIGN: Retrospective review of a large series of patients who underwent spinal surgery at a single institution during a 10-year period. OBJECTIVES: To further clarify the frequency of incidental durotomy during spine surgery, its treatment, associated complications, and results of long-term clinical follow-up.SUMMARY OF BACKGROUND DATA: Incidental durotomy is a relatively common occurrence during spinal surgery.ncidental durotomy occurred at the time of surgery in 66 patients (3.1% overall incidence). Incidence varied according to the specific procedure performed but was highest in the group that underwent revision surgery.
Dirty thermocouple: If you can light your pilot light, but the water heater pilot keeps going out, there are many possible causes. One of them is a dirty thermocouple. When you have a problem with your water heater not lighting, look at your water heater pilot light. Inspect the thermocouple to determine if it is dirty.
Here is the step-by-step guide how to light a hot water heater if the pilot flame is lit by the piezoelectric igniter: 1  Remove the outer door panel. 2  Turn the temperature control to its lowest setting. 3  Put the gas knob to the OFF position.  Wait for ten minutes to clear out any accumulated gas.