[Calculating the optimum size of a hemodialysis unit based on infrastructure potential].
OBJECTIVE
To estimate the optimum size for hemodialysis units to maximize production given capital constraints.


METHODS
A national study in Mexico was conducted in 2009. Three possible methods for estimating a units optimum size were analyzed: hemodialysis services production under monopolistic market, under a perfect competitive market and production maximization given capital constraints.


RESULTS
The third method was considered best based on the assumptions made in this paper; an optimal size unit should have 16 dialyzers (15 active and one back up dialyzer) and a purifier system able to supply all. It also requires one nephrologist, five nurses per shift, considering four shifts per day.


CONCLUSIONS
Empirical evidence shows serious inefficiencies in the operation of units throughout the country. Most units fail to maximize production due to not fully utilizing equipment and personnel, particularly their water purifier potential which happens to be the most expensive asset for these units.
Avila-Palomares
Paula
P
Unidad de Proyectos Especiales de Investigación, Facultad de Medicina, Universidad Nacional Autónoma de México, Delegación Coyoacán, México DF, México.
López-Cervantes
Malaquías
M
Durán-Arenas
Luis
L
D006436:Hemodialysis Units, Hospital / Q000458:organization & administration* / Q000706:statistics & numerical data*