Table 1.
List of specifications for LMA-Supreme™ and LMA-Protector™. CPR, cardiopulmonary resuscitation; LMA, laryngeal mask airway; MR, magnetic resonance; N/A, not applicable; TT, tracheal tube
| Specification | LMA-Supreme™ | LMA-Protector™ |
|---|---|---|
| Indication for use as airway device | ||
|
|
|
| Available LMA sizes | 1, 1.5, 2, 2.5, 3, 4, and 5 | 3, 4, and 5 |
| Material, both cuff and tube | Polyvinyl chloride | Medical-grade silicone |
| Number of uses | Single use | Single use |
| Functional separation of ventilation and digestive tracts | Yes | Yes |
| Number of ventilation tubes | Two lateral (ventilation paths divided by drain tube) | One central (maximal internal diameter 13 mm) |
| Number of gastric tubes | One | Two (male suction port and female drainage port) |
| Position of proximal gastric drainage orifice | Behind 15 mm connector | Two separate ports on each side of airway tube |
| Position of drainage tube | Runs in middle of airway tube | On each side of airway tube |
| Design of distal drainage orifice | Elongated cuff, 10° slant | Elongated cuff, 10° slant |
| Drainage chamber behind cuff bowl | N/A | Yes, two drainage channels continue distally and enter chamber |
| Nominal length of internal ventilation pathway of LMA sizes 3, 4, and 5 (cm) | 16, 17, and 19 | 16, 18, and 20 |
| Nominal length of internal drainage pathway of LMA sizes 3, 4, and 5 (cm) | 22, 24, and 26 | 18, 21, and 23 |
| Internal volume of ventilatory pathway for LMA sizes 3, 4, and 5 (ml) | 18, 23, and 26 | 18, 22, and 23 |
| Internal volume of drainage pathway for LMA sizes 3, 4, and 5 (ml) | 6, 6.5, and 7 | 31, 41, and 42 |
| Design of cuff | Enlarged air-inflatable cuff, high airway seal cuff, reinforced tip | Enlarged air-inflatable cuff, high airway seal cuff, reinforced tip |
| Design of tube | Firm, anatomically shaped oval tube. Semi-rigid fixed-curved tube (2 lateral grooves in airway tube) | Anatomically shaped oval tube. Flexible-curved tube |
| Cross-section of airway tube | Elliptical | Elliptical |
| Mask aperture bars (n) | Two ‘fins’ to prevent epiglottic downfolding | None |
| Guiding handle/fixation tab | Yes | Yes |
| Colour of cuff/tube | Transparent/transparent | White/blue transparent |
| Built-in bite block, long version | Yes | Yes |
| Minimal interdental gap for sizes 3, 4, and 5 (mm) | 19, 20, and 20 | 28, 32, and 32 |
| 15 mm connector, ISO 5356-1 | Fixed | Detachable |
| Latex free | Yes | Yes |
| Phthalates (DHEP) free | No | Yes |
| Inflation valve, Luer cone, ISO 594-1 | Yes | Yes |
| Cuff pilot | Separate cuff pilot balloon | Separate cuff pilot balloon or Integrated Cuff Pilot™ |
| Maximal cuff pressure (cm H2O) | 60 | 60 |
| Magnetic resonance imaging | MR conditional (metallic spring) | MR conditional (metallic spring); MR compatible Integrated Cuff Pilot™ |
|
Requires special technique8 | Yes |
| N/A | TT: 6.5, 7.5, and 7.5 | |
| Maximal orogastric tube through drainage tube for LMA sizes 3, 4, and 5 | 14, 16, and 16 Fr | 16, 18, and 18 Fr |