Linear Scaling

One of our goals is to create a prosthetic hand that is easily customizable. In doing so, we have created a customization process by scanning each patient’s hand and replicating a mirror image prosthetic. However, we will not be able to customize a proportional hand for a patient that does not have either hand. Therefore, after doing some research, we have discovered that there is a very strong correlation between hand length and height. According to the International Journal of Biological and Medical Research, there exists a correlation that the height in any age group irrespective of sex is 9.08 – 9.03 times more than the length of the hand (Pawar and Dadhich 2010). Data was collected from a sample size of 298 individuals divided into various age groups and with an even ratio of males to females. The procedure is explained in depth and factors such as diurnal variation were taken into account, such that patients were measured at a fixed time in the day, to eliminate any possible error in measurements. Each patient was measured by the same person and procedure and the mean height and average length of hand were measured according to each age group and sex. The data collected was used to formulate the mean ratio of height and length of hand where it was concluded that the height of an individual is 9 times the height of hand length (Pawar and Dadhich 2010). The information found between the correlation of height and length of hand is very important as it will allow us to customize a well-proportioned hand for patients that do not have either hand.