Index: ssts-tousse/src/main/java/com/forgon/disinfectsystem/tousse/instrumentinstance/service/InstrumentInstanceManagerImpl.java
===================================================================
diff -u -r35194 -r35256
--- ssts-tousse/src/main/java/com/forgon/disinfectsystem/tousse/instrumentinstance/service/InstrumentInstanceManagerImpl.java	(.../InstrumentInstanceManagerImpl.java)	(revision 35194)
+++ ssts-tousse/src/main/java/com/forgon/disinfectsystem/tousse/instrumentinstance/service/InstrumentInstanceManagerImpl.java	(.../InstrumentInstanceManagerImpl.java)	(revision 35256)
@@ -1396,7 +1396,7 @@
 			vo.setUseAmount(useAmount);
 			//维修次数
 			//总使用天数
-			Long useDay = getInstrumentInstanceUseDay(instrumentInstance);
+			Long useDay = getInstrumentInstanceUseDay(vo.getMaterialEntryTime());
 			vo.setUseDay(useDay);
 			//平均成本:根据该器械的使用次数以及购买价格进行计算，按照成本公式计算(待定)
 			Double averageCost = vo.getMaterialEntryCost() == null ? 0.0 : vo.getMaterialEntryCost();
@@ -1442,15 +1442,10 @@
 	 * @return
 	 */
 	private long getInstrumentInstanceUseDay(
-			InstrumentInstance instrumentInstance) {
-		if(instrumentInstance == null || !DatabaseUtil.isPoIdValid(instrumentInstance.getMaterialEntryId())){
+			Date materialEntryTime) {
+		if(materialEntryTime == null){
 			return 0;
 		}
-		MaterialEntry materialEntry = (MaterialEntry) objectDao.getById(MaterialEntry.class.getSimpleName(), instrumentInstance.getMaterialEntryId());
-		if(materialEntry == null || materialEntry.getTime() == null){
-			return 0;
-		}
-		Date materialEntryTime = materialEntry.getTime();
 		long l = new Date().getTime() - materialEntryTime.getTime();
 		long d = l / (24 * 60 * 60 * 1000);
 		return d;