THERAPEUTIC PROCEDURES - Medicine for Mountaineering and Other Wilderness Activities - page 536

Figure B-2. Apparatus for administration of intravenous fluids
4. After the needle has been threaded into the vein, the hub of the catheter should be
grasped securely to ensure it is not pulled out, and the needle should be extracted. The
end of the intravenous tubing should be inserted into the hub of the catheter, the clamp
on the tubing should be released, and the tourniquet should be removed from the per-
son'sarm.Alternately asalinelock,whichwillkeepthecatheter open,canbeattached
to the catheter.
5. Once the fluids are flowing satisfactorily, the catheter should be anchored with tape,
and the last eight to ten inches of tubing should be formed into an S or U and taped to
the person's arm. Such loops absorb any accidental pulls on the apparatus and prevent
dislodging of the catheter. If the individual is not fully conscious or is thrashing about,
thearmshouldbeanchoredinsomemanner—possiblyasplint—whilefluidsarebeing
given.
Figure B-3. Technique for inserting a needle for intravenous therapy
6. In a hospital the clamp on the tubing is usually partially closed so that the fluid is
flowingatabout200mlperhour(approximatelyfiftydropsperminute).Inwilderness