nitrous oxide: patient assessment, administration, and monitoring

what should be reviewed before administering nitrous oxide?

medical hx

current medications

allergies

previous sedation experiences

pregnancy status

last meal

tobacco/alc/drug use

baseline vital signs

why is a thorough medical history important before nitrous oxide

helps identify contraindications, precautions, and possible drug interactions so nitrous oxide can be administered safely

why should you ask about a patient’s previous experience with sedation?

to determine whether they tolerated it well, experienced nausea or other complications, or have anxiety related to previous sedation

why should the patient’s pain and anxiety level be assessed before treatment?

bc nitrous oxide is mainly used to reduce anxiety and improve pain tolerance, and the amount needed varies from patient to patient

what vital signs should be recorded before nitrous oxide

BP, pulse, RR, (some may record oxygen saturation)

why should baseline vital signs be obtained

they provide a comparison throughout treatment to ensure the pt remains stable

why is the nasal hood important

it delivers the no/o mixture

helps remove exhaled nitrous oxide through the scavenging system

reduces occupational exposure

what is the purpose of the scavenging system?

to collect and remove exhaled nitrous oxide from the operatory, protecting the dental team from chronic exposure

what is the first step when administering nitrous oxide?

begin with 100% oxygen for a few minutes before introducing nitrous oxide

helps establish a normal breathing pattern and obtain the patient’s baseline oxygenation before sedation

how is nitrous oxide introduced?

slowly and gradually (titration), increasing small amounts until the desired effect is reached

why is nitrous oxide titrated

bc every pt responds differently, titration allows you to find the lowest effective concentration for that individual

during nitrous oxide administration, what should be continuously monitored?

pt responsiveness, breathing, comfort, skin color, overall appearance

what are signs an appropriate level of sedation has been achieved?

calm and relaxed

responds notmally to conversation

regular breathing

slight tingling or warmth

less anxious

comfortable but awake

sensations pt might commonly report during appropriate nitrous oxide sedation

tingling in hands and feet

warmth

heaviness or lightness

relaxation

feeling floaty

what are signs of oversedation

doesn’t respond normally

confusion

excessive sleepiness

nausea

sweating

complaints of feeling sick

uncooperative behavior

what should be done if a pt begins showing signs of oversedation

stop the nitrous oxide

admin 100% oxygen

monitor and reassure patient

symptoms usually resolve within a few minutes

if a patient says they feel nauseated during nitrous oxide sedation, what should you do

decrease or stop nitrous oxide and admin 100% ocygen until symptoms improve

what is the final step after treatment is complete

admin 100% oxygen for 3-5 minutes before removing the nasal hood

why shouldn’t the nasal hood be removed immediately after stopping nitrous oxide

to breathe 100% oxygen first to prevent diffusion hypoxia

before dismissing the pt, what should be evaluated

returned to baseline

normal vitals

no dizziness or nausea

normal coordination

feel ready to leave