Maxillofacial Surgery and OSAS Flashcards
Prevalence of Obstructive Sleep Apnea Syndrome (OSAS) is males and females
Males: 6-9%
Females: less than 4%
what is apnea?
cessation of breathing for longer than 10 seconds
what is hypopnea?
- decreased airflow of >70%
- any decreased airflow with desaturation of <90%
what RDI defines sleep apnea?
*respiratory disturbance index
RDI > 15
RDI for mild, moderate, and sever sleep apnea
*respiratory disturbance index
mild: 15-25
moderate: 26-40
severe: greater than 40
what % of hypertensives have sleep apnea?
25%
An RDI of what is an independent predictor of a myocardial infarction?
RDI >20
T/F RDI severity is an independent predictor of a stroke
True
What AI (apnea index) has a mortality rate of 37%?
> 20
What is the rationale for an oral appliance to help apnea?
enlarges upper airway and improves upper airway muscle tone by advancing mandible
4 success predictors for and an oral appliance?
1-lower baseline AHI
2- greater voluntary mandibular protrusion
3-larger positional components of OSA
4-lower BMI
2 oral appliance indicators
Primary snorers, mild to moderate OSA
*if severe OSA, upper airway surgery may be supersede OA
Does oral appliance compliance increase or decrease with time?
decrease
7 oral appliance prerequisites
1-qualified dental practitioner 2-6-10 teeth 3-adequate jaw range of motion 4-no important TMD or bruxism 5-dexterity to place device 6-overnight titration by PSG is experimental 7-dental follow up
which genial surgery yielded more success, Genioglossus advancement or inferior boarder sliding osteotomy?
Genioglossus advancement
which areas does maxillormandibular advancement effect?
nasopharynx, oropharynx, and hypopharynx
what muscles does a maxillormandibular advancement effect in the hypopharynx?
pharyngeal sidewalls, stylohyoid muscle, and digastric muscles
what are the two distinct groups of OSAS patients?
1- obese with normal face
2-no non-obese with facial deformaties
what two films are taken for a ceph?
retruded mandible and end to end
what percent of patients reported favorable, neutral changes OSAS?
56%, 33%
