History of Deafness and PT Test Results in 35 Patients with Profound Deafness
| Case | Patient Age(y)/Sex/Side Affected | PT Test Result* | Etiology | Time Since Onset of Hearing Loss (y) | Age at Onset of Complete Deafness (y) | Acute or Progressive | Onset of Deafness |
|---|---|---|---|---|---|---|---|
| 1 | 46/F/R | 3 | Viral | 42 | 2 | Progressive | Postlingual |
| 46/F/L | 3 | Viral | 42 | 2 | Progressive | Postlingual | |
| 2 | 25/M/R | 1 | Probably hypoxia | 25 | 25 | Progressive | Prelingual |
| 3 | 40/F/R | 1 | Viral | 26 | 3 | Progressive | Postlingual |
| 4 | 22/F/L | 1 | Viral | 20 | 6 | Progressive | Postlingual |
| 5 | 62/F/R | 2 | Otosclerosis | 37 | 20 | Progressive | Postlingual |
| 6 | 69/F/L | 1 | Progressive labyrinthine hearing loss | 10 | 0.5 | Progressive | Postlingual |
| 7 | 25/F/L | 2 | Unknown, congenital | 25 | 1 | Progressive | Postlingual |
| 8 | 38/M/L | 1 | Progressive labyrinthine hearing loss | 38 | 3 | Progressive | Postlingual |
| 9 | 41/F/R | 4 | Unknown | 26 | 0 | Progressive | Postlingual |
| 10 | 24/F/L | 2 | Probably multiple sclerosis | 3 | 0 | Progressive | Postlingual |
| 11 | 74/M/R | 1 | Posttraumatic progressive hearing loss | 55 | 20 | Progressive | Postlingual |
| 12 | 42/M/R | 1 | Genetic | 36 | 18 | Progressive | Postlingual |
| 13 | 51/M/L | 1 | Meningitis | 1 | 1 | Acute | Postlingual |
| 14 | 48/M/L | 2 | Progressive labyrinthine hearing loss | 32 | 18 | Progressive | Postlingual |
| 15 | 31/F/L | 2 | Toxic (aminoglycosides) | 3 | 3 | Progressive | Postlingual |
| 16 | 23/F/L | 1 | Viral | 14 | 0.5 | Progressive | Postlingual |
| 17 | 52/M/L | 1 | Unknown | 12 | 3 | Progressive | Postlingual |
| 18 | 22/F/R | 1 | Unknown, congenital | 22 | 22 | Acute | Prelingual |
| 19 | 24/M/L | 1 | Unknown, congenital | 24 | 24 | Acute | Prelingual |
| 20 | 30/M/L | 4 | Meningitis | 7 | 7 | Acute | Postlingual |
| 21 | 58/M/R | 4 | Progressive labyrinthine hearing loss | 40 | 0.5 | Progressive | Postlingual |
| 22 | 61/F/L | 3 | Tumor (meningioma of petrous bone) | 3 | 0 | Progressive | Postlingual |
| 61/F/R | 4 | Unknown, congenital | 61 | 61 | Progressive | Postlingual | |
| 23 | 30/F/L | 4 | Unknown | 6 | 0 | Progressive | Postlingual |
| 30/F/R | 4 | Unknown | 6 | 0 | Progressive | Postlingual | |
| 24 | 52/M/L | 3 | Left side, trauma; right side, congenital | 23 | 0 | Acute | Postlingual |
| 25 | 27/F/L | 2 | Unknown | 3 | 0 | Progressive | Postlingual |
| 26 | 22/F/R | 2 | Progressive labyrinthine hearing loss | 17 | 0 | Progressive | Postlingual |
| 27 | 28/F/L | 3 | Toxic | 2 | 2 | Acute | Postlingual |
| 28 | 20/F/R | 1 | Unknown | 20 | 0.2 | Progressive | Postlingual |
| 29 | 58/M/R | 1 | Progressive labyrinthine hearing loss | 17 | 0 | Progressive | Postlingual |
| 58/M/L | 2 | Progressive labyrinthine hearing loss | 17 | 0 | Progressive | Postlingual | |
| 30 | 49/F/R | 3 | Unknown | 30 | 2 | Progressive | Postlingual |
| 31 | 52/F/R | 4 | Unknown | 0.5 | 0.5 | Acute | Postlingual |
| 32 | 37/M/R | 3 | Trauma (fracture of petrous bone) | 0.2 | 0.2 | Acute | Postlingual |
| 37/M/L | 4 | Trauma (fracture of petrous bone) | 0.2 | 0.2 | Acute | Postlingual | |
| 33 | 61/M/L | 1 | Unknown | 10 | 0 | Progressive | Postlingual |
| 34 | 20/F/R | 4 | Unknown, congenital | 20 | 0 | Progressive | Postlingual |
| 20/F/L | 4 | Unknown, congenital | 20 | 0 | Progressive | Postlingual | |
| 35 | 41/M/R | 2 | Traumatic brain injury | 0.5 | 0.5 | Acute | Postlingual |
| 41/M/L | 2 | Traumatic brain injury | 0.5 | 0.5 | Acute | Postlingual |
* 1 indicates a good result, clear constant hearing impression in at least four frequencies, with clear rhythm detection; 2, clear constant hearing impression in at least three frequencies with rhythm detection; 3, hearing impression in three frequencies with some nonauditory impression or minimal auditory fatigue; and 4, no clear hearing impression or massive auditory fatigue.