The Vel weak phenotype is due to a heterozygous deletion in the same exon, resulting one functional copy of the SMIM1 gene. If a patient who is Vel negative is transfused with Vel positive red blood cells, they may form anti-Vel alloantibodies.
Hearing aids need to be fitted by someone trained specifically in hearing problems. An audiologist or licensed hearing aid provider can make sure your hearing aids fit and work for your type and degree of hearing loss. You also need to consider cost.
When first using a hearing aid, keep these points in mind: 1  Hearing aids won't return your hearing to normal. Hearing aids can't restore normal hearing. They can improve your hearing by amplifying soft sounds.  Allow time to get used to the hearing aid. It takes time to get used to your new hearing aid.