CHT Treatment Protocols & Procedures 2

Question 1

Which UHMS-approved treatment table is used for arterial gas embolism when Table 6 fails to resolve symptoms?

Accepted Answer

Table 6A

Answer

Table 6A extends Table 6 with an additional 60-minute oxygen period at 60 fsw for cases where symptoms persist.

Question 2

During a hyperbaric oxygen treatment, a patient reports vision changes and facial twitching. What is the most likely cause and correct action?

Accepted Answer

CNS oxygen toxicity; remove oxygen mask immediately

Answer

Facial twitching with vision changes are prodromal signs of CNS oxygen toxicity, requiring immediate removal of the oxygen mask and air break.

Question 3

What is the standard air break duration in a treatment table that includes air breaks to reduce oxygen toxicity risk?

Accepted Answer

5 minutes

Answer

Standard air breaks are typically 5 minutes of air breathing between oxygen periods to reduce cumulative CNS oxygen toxicity risk.

Question 4

A tender inside the chamber should breathe oxygen during a treatment for decompression sickness primarily to:

Accepted Answer

Reduce the risk of the tender developing decompression sickness

Answer

Breathing oxygen at depth reduces the tender's nitrogen loading, lowering their risk of developing decompression sickness during the treatment dive.

Question 5

In the U.S. Navy Table 6 protocol, oxygen is breathed at 60 fsw (2.8 ATA) in cycles. What is the oxygen breathing schedule at 60 fsw?

Accepted Answer

Three 20-minute periods with two 5-minute air breaks

Answer

Table 6 includes three 20-minute oxygen periods separated by two 5-minute air breaks at 60 fsw before the ascent phase.

(CHT) Certified Hyperbaric Technician Practice Test