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.
Ask for a telecoil when you buy your hear-ing aid. A telecoil might add a small amount to the cost of your hearing aid but the bene-fits far outweigh the cost. Ask your audiologist or hearing instrument specialist to include a telecoil in your hearing aid and ask for advice on how to use it.