diff --git a/HealthMonitor.Service/Cache/DeviceCacheManager.cs b/HealthMonitor.Service/Cache/DeviceCacheManager.cs
index bdee39b..623d6b0 100644
--- a/HealthMonitor.Service/Cache/DeviceCacheManager.cs
+++ b/HealthMonitor.Service/Cache/DeviceCacheManager.cs
@@ -86,7 +86,7 @@ namespace HealthMonitor.Service.Cache
         {
             try
             {
-                var key = $"PregnancyHeartRateFreqStatus_{sn}";
+                var key = $"PhrFreqStatus_{sn}";
                 var status = await RedisHelper.GetAsync(key).ConfigureAwait(false);
                 if (string.IsNullOrEmpty(status)) return null;
                 return JsonConvert.DeserializeObject<PregnancyHeartRateModel>(status);
@@ -102,7 +102,7 @@ namespace HealthMonitor.Service.Cache
         {
             try
             {
-                var key = $"PregnancyHeartRateFreqStatus_{sn}";
+                var key = $"PhrFreqStatus_{sn}";
                 var data=JsonConvert.SerializeObject(status);
                 await RedisHelper.SetAsync(key, data, expire).ConfigureAwait(false);
             }