Dynarex Resp-O2 Portable Oxygen Concentrator (MPN 33955)
A lightweight, pulse-dose portable concentrator built for ambulatory patients — six physician-prescribed settings, FAA travel conformance, and up to 4 hours 20 minutes of battery runtime in a 4.76 lb unit.
For ambulatory patients on pulse-dose oxygen therapy, portability and reliable breath-detection are what make daily independence possible — whether that's a trip to the grocery store, air travel, or simply moving freely around the house. The Dynarex Resp-O2 (MPN 33955) is built around that need.
Offering six physician-prescribed pulse-dose settings from 210 to 1,260 mL/min, breath-detection dosing, and a total weight of just 4.76 lb with battery, the Resp-O2 is designed for home health, discharge planning, and travel-oxygen programs that need a documented, FAA-conformant option.
Engineered by Dynarex
The Resp-O2 is produced under the Dynarex brand and ships as a complete kit — concentrator, 8-cell battery, AC power supply and cord, DC adapter, nasal cannula, filter kit, and carrying bag with shoulder strap — one unit per case. The device is not made with natural rubber latex, and pulse-dose output is tested to ISO 80601-2-67 (±15%).
Dynarex Resp-O2 Portable Oxygen Concentrator
Dynarex Resp-O2 (MPN 33955)
A lightweight pulse-dose portable oxygen concentrator delivering six physician-prescribed settings from 210 to 1,260 mL/min total output, maintaining 90% oxygen concentration (-3% / +6%) at every setting. Breath-detection technology times each dose to the start of inhalation, with visual and audible alarms for low battery, low oxygen purity, and no-breath-detected conditions. At 4.76 lb with the included 8-cell battery, it's built for portability across home health, facility, and travel use, with manufacturer-determined FAA acceptance criteria conformance for in-flight use.
Complete Spec Sheet
| Specification | Detail |
|---|---|
| Brand | Dynarex |
| Model / MPN | 33955 (Resp-O2 Portable Oxygen Concentrator) |
| Delivery Mode | Pulse Dose |
| Pulse Dose Settings | 6 (settings 1 through 6) |
| Oxygen Output | Setting 1 = 210 mL/min, 2 = 420, 3 = 630, 4 = 840, 5 = 1050, 6 = 1260 mL/min (0.21–1.26 L/min). Tested to ISO 80601-2-67, ±15% |
| Oxygen Concentration | 90% (-3% / +6%) at all settings |
| Weight | 3.62 lb (1.64 kg) without battery; 4.76 lb (2.16 kg) with 8-cell battery |
| Dimensions | 8.6 x 3.5 x 7.4 in (with 8-cell battery) |
| Battery Life | Up to 4 hrs 20 min on setting 1 (8-cell); optional 16-cell double battery available |
| Recharge Time | Up to 5 hrs while operating on AC; up to 3 hrs when off and on AC |
| Sound Level | 43 dBA typical at setting 2 |
| Warm-Up | Up to 2 minutes |
| Max Breathing Rate | 40 BPM |
| Power | AC adapter 100-240V, 50/60 Hz; battery 14.8V DC, 94.72 Wh lithium-ion (8-cell) |
| Operating Environment | 41°F–104°F, 15%–90% RH non-condensing, 0–10,000 ft |
| Included Contents | Concentrator, 8-cell battery, AC power supply/cord, DC adapter, nasal cannula, filter kit, carrying bag with shoulder strap |
| Industry Codes | HCPCS: E1390 + E1392 |
| Country of Origin | China |
Clinical Selection Note: Pulse volume per breath varies with breathing rate. Always cross-reference device settings with your physician's specific prescription.
Who Is the Resp-O2 Typically Prescribed For?
The Resp-O2 is best suited to ambulatory patients on a pulse-dose prescription who need a lightweight, travel-ready device — this includes home health and discharge-planning programs standardizing on a single portable SKU, and patients who travel by air and need a device with documented FAA acceptance criteria conformance. Standardizing on one portable concentrator SKU across a facility's programs can also simplify battery, filter, and cannula stock reconciliation and staff training. As with any oxygen device, the appropriate delivery mode and setting should be determined by your physician based on your specific prescription.
Adding the Resp-O2 to the EnhDme-Pro catalog rounds out our portable oxygen lineup with a lightweight, travel-conformant option for physicians prescribing pulse-dose therapy.
Frequently Asked Questions
Can our facility order the Resp-O2 in bulk, and how is it packaged?
The Resp-O2 ships 1 unit per case. Contact your EnhDme-Pro account representative for bulk quantity pricing and lead times on multi-unit facility orders.
Is this device restricted to prescription sale?
Yes. This is an Rx-only device — federal (USA) law restricts sale of this device to, or on the order of, a physician. Review our Prescription Policy for documentation requirements before ordering.
What oxygen output should we expect across the six pulse-dose settings?
Output ranges from 210 mL/min at setting 1 up to 1,260 mL/min at setting 6, with 90% oxygen concentration (-3% / +6%) maintained at every setting. Pulse volume per breath varies with breathing rate and is tested to ISO 80601-2-67, ±15%.
Is the Resp-O2 approved for use on commercial flights, and is it latex-free?
The manufacturer has determined this device conforms to applicable FAA acceptance criteria for POC carriage and use on board aircraft. The device is not made with natural rubber latex.
Kevin Lambing, CDME
Kevin Lambing, CDME is the CEO and founder of EnhDme-Pro (enhdme-pro.com). As a Certified Durable Medical Equipment Specialist with over two decades of experience in clinical respiratory distribution, Kevin leads EnhDme-Pro in providing high-grade medical equipment and technical education to healthcare providers and clinical institutions nationwide.