Operating Instructions
Page 20
RevA
Sample Tissue Bar Graphs
Tissues Bar Graph
The tissues bar graph shows the tissue compartment
inert gas tissue tensions based on the Bühlmann ZHL-
16C model.
The fastest tissue compartment is shown on the
top, and the slowest on the bottom. Each bar is the
combined sum of the nitrogen and helium inert gas
tensions. Pressure increases to the right.
The vertical Cyan line shows the inert gas inspired
pressure. The yellow line is the ambient pressure. The
red line is the ZHL-16C M-Value pressure.
Tissues that are supersaturated above ambient
pressure are shown in yellow, and tissues that are
supersaturated above the M-Value are shown in red.
Note that the scale for each tissue compartment is
different. The reason the bars are scaled in this way is
so that the tissues tensions can be visualized in terms
of risk (i.e. how close they are as a percentage to
Bühlmann’s original super- saturation limits). Also, this
scale changes with depth, since the M-Value line also
changes with depth.
m
min
SURFACE
TISSUES
m
min
SURFACE
TISSUES
Inspired inert
gas pressure
Ambient
Pressure
Increasing
Pressure
M-Value
Pressure
16 tissue
compartments
{
m
min
SURFACE
TISSUES
On surface (sat. with air)
Note: Gas is 79% N
2
(21% O
2
, or Air)
m
min
SURFACE
TISSUES
Immediately after descent
Deep Stop
m
min
SURFACE
TISSUES
On Gassing
m
min
SURFACE
TISSUES
Last deco Stop
Note: Gas is now 50% O
2
and 50% N2
m
min
SURFACE
TISSUES
Summary of Contents for Teric
Page 1: ...Operating Instructions...
