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.
Of course, everyoneâs hearing loss is different, but when you buy a hearing aid, youâre getting an instrument designed to help your hearing loss in that range of human speech. When you put a hearing aid in your ear, Baker said, you experience a phenomenon called âinsertion gainâ and âinsertion loss.â.