Table 2.
Studies published containing data regarding site of obstruction seen while performing dynamic sleep magnetic resonance imaging (MRI) for obstructive sleep apnea (OSA) patients
| OSA Patient Cohort Information | Region of Collapse Seen on Dynamic Sleep MRI | Multi-level Obstruction Combination | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Author, Year | Number of OSA patients (M,F) | Number of non-OSA patients (control) | AHI (events/hr) | Average BMI ± SD (kg/m^2) | Average Age ± SD (years) | Sedation use (agent) | Nasopharynx (NP) | Retropalatal (RP) | Retroglossal (RG) | Hypopharynx (HP) | Lateral Pharygeal Wall (LPW) | RP + RG | RP + HP | RP + RG + HP | RP + LPW | RP + RG + LPW |
| Suto et al. [6] | 15 (9,6) | 5 | – | – | 59.5 | Induced (hydroxazine hydrochloride) | 0.00% | 87.00% | 40.00% | 13.33% | – | 33.00% | 6.68% | 6.68% | – | – |
| Ikeda et al. [29] | 6 (5,1) | 3 | 35.9 ± 13.9 | 27.6 ± 2.1 | 43 | Natural | – | 100.00% | 33.00% | – | – | – | – | – | – | – |
| Chuang et al. [25] | 10 (−,−) | 0 | 55.73 ± 17.68 | 27.0 ± 3.24 | 44.1 ± 9.16 | Induced (zolpidem) | – | 100.00% | 40.00% | – | 30.00% | 30%† | - | - | – | 30% ‡ |
| Moriwaki et al. [28] | 31 (29,2) | 0 | 40.6 ± 21.7 | 26.7 ± 4.9 | 46.6 ± 8.2 | Natural | 0.00% | 96.80% | 32.30% | 19.35% | – | 25.80% | 9.70% | 6.50% | – | – |
| Barrera et al. [44] | 20 (15,5) | 15 | 36.8 ± 26.9 | 27.5 ± 4.0 | 40.2 ± 10.1 | Natural | 0.00% | 100% § | 65% § | – | – | - | – | – | – | – |
| Moon et al. [24] | 33 (30,3) | 2 | RDI (23.1 ± 13.87) | 25.5 ± 3.46 | 52.63 ± 8.76 | Induced (midazolam) | – | 100.00% | 60.60% | – | 42.42% | 60.60% | – | – | – | 45.45% †† |
| Kavcic et al. [26] | 15 (13,2) | 0 | 60.5 ± 25.6 | 34.6 ± 4.2 | 48.9 | Natural | – | 100.00% | 0.00% | – | – | - | – | – | – | – |
| Huon et al. [19] | 15 (15,0) | 0 | 70.3 ± 22.9 | 27.0 ± 3.4 | 45.4 ± 8.4 | Natural | – | 100.00% | 40.00% | – | 100.00% | 0.00% | – | – | 60.00% | 40.00% |
| Huon et al. [20] | 15 (15,0) | 0 | 7.8 ± 1.4 | 25.7 ± 3.6 | 44.3 ± 8.9 | Natural | – | 100.00% | 26.67% | – | 20.00% | 13.30% | – | – | 0.00% | 6.70% |
| Total | 160 (131,19) | 25 | 38.7 ± 26.6 | 27.2 ± 4.6 | 47.8 | 0.00% | 98.10% | 40.60% | 17.39% | 21.90% | 23.80% | 2.50% | 1.90% | 5.60% | 34.25% | |
− , Not reported; AHI apnea hypopnea index; RDI respiratory disturbance index; BMI body mass index; SD standard deviation
†Based on description of Type 2 collapse
‡based on description of Type 3 collapse
§Estimated based on two raters; based on description of transverse collapse
††Based on description of circumferential collapse