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.
Follow Following Unfollow Pending Disabled. A Dr. David M. Vernick, MD , Ear, Nose & Throat (Otolaryngology), answered. Getting used to a hearing aid takes time, usually at least a month to six weeks, but it may take as long as several months until your ability to understand speech has peaked. If you don't notice a marked improvement by the end of the first month, there's a strong chance that the hearing aid isn't right for you.