hi um I want to talk about wheelchair um prescription and given U what we have learned so far um I think it should be a breeze uh for you to understand the concept of uh prescribing uh the wheelchair for uh our client so in short um there are two types of wheelchair available uh well in general that we have manual chair and then we have power chair U within the category of manual wheelchair um the standard one is you know um what what we typically see um on street that uh you can kind of you know collapse it uh and then the whe the wheel is larger and uh there are a couple more different type of manual chair um for example um if um a person needs to transport them a lot a lightweight wheelchair is more um easy uh for use and or uh if this person uh would like to do some Sport and um the sport uh type of wheelchair uh needs to be uh customized because typically uh it really needs to fit this person's wants and needs and the physical condition and uh for power uh wheel chair uh typically uh it allows uh the way uh the person to do uh te in play in in space and again it would need to uh fit the need the the unique needs of the client um oftentimes you can um also um learn about different terms of a wheelchair for example um there one there's one type of attendant Propel so you need someone to to push the wheelchair for you or you uh Propel the wheelchair uh yourself and or and then power wheelchair U and then scooter scooter is one type of a wheelchair in this category so when when you when we as an not when we uh consider uh uh a proper design of wheelchair for our client we need to consider um you know the the whole person so what do they need what do they do uh for ADL and what is the uh uh physical condition psychological condition um and then um the societal situation toward uh uh person with a physical dysfunction and can this person afford um um a specific type of wheelchair okay so we need to consider all these vectors um and again we we want when we uh when we um evaluating or um a a proper design for wheelchair we need we we need you know it's really depending on the needs um what they want and what they need to do um in for their daily uh occupation can they afford and um maybe um if it's more like a high-tech uh wheelchair you need to decide what interface of the system that attached to the wheelchair uh will be required will be um preferable with this person so again you can kind of uh appreciate that it's not that simple that we simp that we simply look at of uh a wheelchair and it's not that simple if we choose you know a Hightech um um um type of a wheelchair for this person because it may not fit uh the person's needs or it cannot you know this person cannot afford this type of wheelchair just because of the high-tech uh feature even though it's so good okay so today I want to focus on um the person uh no anthropometry uh so U to U the wheelchair design or ankle that uh that's basically um applicable for all wheelchair design so if you look at the wheelchair uh a typical standard wheelchair design right uh we we um we typically uh consider several um aspect of design so um from the top to the end you will see the head support um if we need the if the person have difficulty um controlling the head movement then we want to give the person a head support and where to put the head support is typically um the base of the skull and we will talk about that later and then um shoulder region should be support but we don't want to interfere with upper extremity movement even though we want to give proper support so again we need to um consider the need and the person's condition to decide the height of the back support and then uh maybe we want to give some L support or um arm rest um and then we want to consider U the seting position so basically we want to facilitate a a neutral sitting position which is 90 90 90 90 for the hip 90 for the hip um I'm sorry 90 for the hip 90 for the knee and then 90 for the ankle so that's 90 90 90 and you know in some situation we want this person to rest so we may want them to tilt backward to have a a short break we don't want to push we don't want this person to kind of fall forward right so does this uh wheelchair have this feature of you know tilt in space that may uh we need to consider that and then the um foot rest the height of the foot rest uh we need to consider and then uh because the foot or the feet is in contact with this uh uh fo plate then the the pressure that we need to consider and not to mention that you know this person is sitting in the wheelchair for a long time every day so the pressure that the body give to the back and at on the seat needs to be carefully calculated and then um you know a lot of um effort uh by the rehab um engineering u s scientists has uh been um putting a lot of effort to develop a proper a proper seat um system um for wheelchair user so uh we will learn more about that in a spring um about um wheelchair selection and seat um um selection