Solution to Frame 60
A fourth consideration of intravenous therapy is the
ANSWER: It depends. The
tonicity of the intravenous solution being
age, size, and renal condition of
administered. In your previous pharmacy related
the patient have been omitted
courses, you were exposed to the concept of
on purpose. Without these bits
osmotic pressure and tonicity. In brief, solutions
of information, a definite answer
are classified into three broad categories based
cannot be given.
upon tonicity, isotonic, hypotonic, and hypertonic.
To begin, an isotonic solution has the same
concentration as that of body fluids. Below is a
diagrammatic representation of the response a cell
exhibits when placed in an isotonic solution:
Observe that when a cell is placed in an isotonic
solution no noticeable change in size occurs.
Therefore, no cell irritation (related to the tonicity of
the solution) would occur. Examples of isotonic
solutions are 0.9% Sodium Chloride Solution and
Lactated Ringer's Injection.
A hypertonic solution is more concentrated than
that of body fluids. Saying it another way, the
hypertonic solution has more solute present per
volume than does cell fluid. Therefore: