[The comparison of clinical features and laboratory indexes between flat descending hearing loss and total hearing loss].

To discuss similarities and differences in clinical features and laboratory indexes between patients with flat descending type sudden hearing loss and those with total hearing loss. The clinical data of 123 patients with full frequencies hearing loss were retrospectively analyzed. The differences in clinical features and laboratory tests(platelet, coagulation series, D-dimer, blood lipids, hemorheology) between patients with flat descending hearing loss and those with total hearing loss were analyzed by gender, age and ear side, treatment time, concomitant symptom (tinnitus, dizziness), original underlying diseases (hypertension, diabetes), etc. In the clinical features,among 51 flat descending cases, the ratio of male and female was 2.401:1; among 72 total hearing loss cases, the ratio of men and women ratio was 1.058:1 (<0.05). Among two groups of patients,the majority received treatment within 7 days, among whom 66.7% were flat descending population, and 83.3% were total hearing loss population (<0.05). Flat descending population with dizziness only accounted for 35.3% while this figure was up to 70.8% when it came to total hearing loss patients (<0.01). Two groups showed no differences in age, ear side, tinnitus, the original underlying diseases (hypertension, diabetes). In the laboratory tests, the total hearing loss population overtopped the plat descending population in PLT and PCT (<0.05), while falling below the plat descending population in APTT (<0.01). Two groups showed no differences in other indicators of platelet and coagulation series and laboratory data of D-dimer, blood lipids, hemorheology. Compared with flat descending sudden hearing loss, sudden total hearing loss more frequently happened to females who also were accompanied by dizziness. The treatment rate within 7 days was high and the patients with hypercoagulable state accounted for a higher proportion.