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PubMed2003

Dental and occlusal changes during mandibular advancement splint therapy in sleep disordered patients.

The aims of this longitudinal, observational study were two-fold: first, to determine in adults with sleep disorders the extent of dental and occlusal changes following the use of a mandibular advancement splint (MAS) and, second, to determine the time course of these changes. One hundred adult subjects (87 males, 13 females) diagnosed with obstructive sleep apnoea (OSA) and/or asymptomatic snoring were treated with non-adjustable MAS. At the outset each subject was randomly assigned to a group and reviewed 6, 12, 18, 24 or 30 months after placement of a splint. There were 20 subjects in each group. Craniofacial changes were measured on lateral cephalometric radiographs taken at the initial and review appointments. When the changes in all subjects were examined, the SNA, ANB angles, ANS-PNS length and face height increased, and the mandibular first molars and the maxillary first premolars significantly overerupted. Significant retroclination of the maxillary incisors and proclination of the mandibular incisors were accompanied by reductions in maxillary arch length, overbite and overjet. When the changes over time were determined, the mandibular symphysis was significantly lower at all review periods. An increase in face height and reductions in overbite and overjet were evident at 6 months, and over-eruption of the maxillary first premolars and mandibular first molars, and proclination of the lower incisors were found at 24 months. Significant positive correlations were also found between the amount of anterior opening by the appliances and changes in overbite at 24 and 30 months. The appliance used produced small, unpredictable changes in the occlusion that tended to occur after 24 months' wear. It is postulated that the changes in overbite might be lessened by keeping the bite opening to a minimum.

Adult↗
PubMed1991

Influence of antihypertensive drug therapy on sleep pattern and sleep apnea activity.

Sleep apnea, which affects 10% of men in the mean age group, is a common illness, and arterial hypertension one of its early symptoms. For the large group of, mainly young, patients with mild to moderate sleep apnea and arterial hypertension it is important to have a drug treatment available which will effectively control blood pressure without exacerbating symptoms of sleep apnea. We studied the effects of antihypertensive agents on blood pressure, sleep and sleep apnea in a randomized double-blind study of 24 patients with a sleep apnea activity of more than 10 apnea phases per hour of sleep and arterial hypertension with diastolic blood pressure values in the sitting position greater than or equal to 95 mm Hg. Mean age was 51 (range: 33-69) years, mean body mass index 31.4 (24.9-40.6) kg/m2. The study protocol envisaged two baseline measurements in the sleep laboratory, after which the medication was administered for 8 days. On the last 2 days of the treatment, polysomnographic leads were once again recorded in the sleep laboratory. The patients received either the beta-blocker metoprolol (1 x 100 mg/day) or the angiotensin-converting enzyme inhibitor cilazapril (1 x 2.5 mg/day). Systolic and diastolic blood pressure were decreased by both substances as expected. Total sleep time was 358 (233-425) min vs. 332 (255-383) min in the metoprolol group and 368 (295-424) min vs. 341 (265-434) min in the cilazapril group which is statistically not different between the two groups nor between the proportions of non-REM and REM sleep.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1999

Long-term use of CPAP therapy for sleep apnea/hypopnea syndrome.

Patients with the sleep apnea/hypopnea syndrome (SAHS) treated by nasal continuous positive airway pressure (CPAP) need to use CPAP long-term to prevent recurrence of symptoms. It is thus important to clarify the level of long-term CPAP use and the factors influencing long-term use. We examined determinants of objective CPAP use in 1, 211 consecutive patients with SAHS who were prescribed a CPAP trial between 1986 and 1997. Prospective CPAP use data were available in 1, 155 (95.4%), with a median follow-up of 22 mo (interquartile range [IQR], 12 to 36 mo). Fifty-two (4.5%) patients refused CPAP treatment (these were more often female and current smokers); 1,103 patients took CPAP home, and during follow-up 20% stopped treatment, primarily because of a lack of benefit. Methods of survival analysis showed that 68% of patients continued treatment at 5 yr. Independent predictors of long-term CPAP use were snoring history, apnea/hypopnea index (AHI), and Epworth score; 86% of patients with Epworth > 10 and an AHI >/= 30 were still using CPAP at 3 yr. Average nightly CPAP use within the first 3 mo was strongly predictive of long-term use. We conclude that long-term CPAP use is related to disease severity and subjective sleepiness and can be predicted within 3 mo.

Adult↗
PubMed2004

Long-acting inhaled anticholinergic therapy improves sleeping oxygen saturation in COPD.

Oxygen desaturation occurs during sleep in severe chronic obstructive pulmonary disease (COPD), especially during rapid eye movement (REM) sleep, due to hypoventilation and ventilation-perfusion mismatching, but the possible contribution of airflow limitation is unclear. In a randomised, placebo-controlled, double-blind study of severe, stable COPD patients, the authors compared 4 weeks treatment with a long-acting inhaled anticholinergic agent (tiotropium), taken in the morning (tiotropium-AM), or in the evening (tiotropium-PM), on sleeping arterial oxygen saturation (Sa,O2) and sleep quality. Overnight polysomnography was performed at baseline and after 4 weeks treatment. A total of 95 patients with awake resting arterial oxygen tension < or = 9.98 kPa (75 mmHg) were randomised, with a mean age of 66.4 yrs and mean forced expiratory volume in one second (FEV1) of 32% predicted. A total of 80 patients completed the study, of which 56 fulfilled the polysomnographic criterion of at least 2 h sleep in both sleep study nights and represent the group analysed. Tiotropium significantly improved spirometry compared with placebo. Both tiotropium-AM and tiotropium-PM groups had higher Sa,O2 during REM than placebo (+2.41% and +2.42%, respectively, and both pooled and tiotropium-PM groups had higher Sa,O2 during total sleep time (+2.49% and +3.06%, respectively). End-of-treatment FEV1 correlated with Sa,O2 during REM sleep, however, tiotropium did not change sleep quality. Sustained anticholinergic blockade improves sleeping arterial oxygen saturation without affecting sleep quality.

Administration, Inhalation↗
PubMed2000

[Future direction of therapies for sleep related breathing disorders].

There are several mechanisms by which pharmacologic agents might improve sleep related breathing disorders. Upper airway muscle atony during sleep and fat deposition on the upper airway walls are critical in the pathogenesis of upper airway obstruction. As central neuromediators that regulate upper airway muscle activity, serotonin, gamma amino-butyric acid and thyrotropin releasing hormone are reviewed. Although agonists or antagonists of these mediators changed the upper airway muscle activity, no agents have successfully improved sleep related breathing disorders. Leptin is a protein produced by adipose tissue that interacts with receptors in the hypothalamus to inhibit eating. Leptin might have therapeutic potential for obesity-related breathing disorders related to a relative deficiency in leptin, or a leptin resistance.

Airway Obstruction↗