C-MAC Video Laryngoscope for Airway Management

The C-MAC video laryngoscope, made by Karl Storz, is a portable, battery-operated device built around a familiar Macintosh-style blade with a miniature camera near the tip. It gives the operator a magnified video view of the airway on an attached screen while still allowing a conventional line-of-sight technique, essentially letting clinicians intubate the way they already know how but with a backup wide-angle image that makes the process more reliable.¹ That dual capability, direct view plus video, is what sets it apart from many competitors and is a big part of why it has become one of the most studied video laryngoscopes in airway management.

How the Device Is Built

The standard C-MAC uses a blade shaped like the classic Macintosh laryngoscope that anesthesiologists and emergency physicians have trained on for decades. A small CMOS camera and LED light source sit near the distal end of the blade, transmitting a live image to an external monitor. In technical comparisons, the C-MAC’s camera has the widest viewing angle among commonly used video laryngoscopes (roughly 63 degrees on the horizontal axis and 48 degrees vertically), and its LED lamp puts out the strongest light intensity at around 7,800 lux.² That wide angle and bright illumination matter in practice because blood, secretions, and poor ambient lighting are everyday realities during intubation.

The system comes in multiple blade options. The standard Macintosh-geometry blades (sizes 2, 3, and 4) are meant for routine adult intubation. The D-Blade is a hyperangulated version designed for anticipated difficult airways, with a steeper curve that lets the camera see around a more anterior larynx. Miller-style straight blades are available for pediatric and neonatal use. All blades connect to the same monitor, so a department only needs one screen and can swap blades to suit the patient.

Performance Against Traditional Direct Laryngoscopy

The most basic question clinicians ask about any video laryngoscope is whether it actually improves intubation success compared to looking directly into the throat with a conventional blade. For the C-MAC, the answer is a fairly consistent yes, especially when the airway is predicted to be difficult. In a study of patients flagged for anticipated difficult intubation, first-attempt success was about 93% with the C-MAC versus 84% with direct laryngoscopy, and the video view delivered a good look at the vocal cords far more often.³

That advantage holds up in the ICU as well. Among critically ill patients with at least one predictor for a difficult airway, first-attempt success jumped from 55% with a standard Macintosh blade to 79% with the C-MAC, and the rate of poor glottic views dropped from about 20% to 7%.⁴ A separate ICU study found a similar gap: 84% first-attempt success with the C-MAC versus 57% with the Macintosh.⁵ Where the airway is straightforward, the margin narrows; the C-MAC still provides a better view on screen, but the direct laryngoscope works well enough that success rates converge.

The D-Blade for Difficult Airways

The hyperangulated D-Blade deserves its own discussion because it behaves differently from the standard Macintosh-geometry C-MAC blades. Its steeper curve gives a dramatic look around corners in the airway, which is invaluable when anatomy or pathology makes a standard approach fail. One cross-sectional study found that the quickest intubation times with the D-Blade came at a blade angulation of about 100 degrees, where the mean time was roughly 20 seconds, while a shallower 80-degree angle more than tripled that to over 60 seconds.⁶ The steeper angle allows the camera to peer past obstructions but requires a pre-shaped stylet to guide the endotracheal tube around the same corner.

More broadly, acute-angle video laryngoscopy as a first-line approach in patients with predicted difficult direct laryngoscopy has been described as an “exceptionally successful” strategy, with very high intubation success rates across devices that use this geometry.⁷ The tradeoff is that the D-Blade eliminates the direct line-of-sight option. You are committing entirely to the screen, which means if the camera fogs or gets obscured by blood, you lose your view. That makes the D-Blade a purpose-built tool rather than an everyday workhorse.

How It Stacks Up Against Other Video Laryngoscopes

The C-MAC competes mainly with the GlideScope (Verathon) and McGrath (Medtronic). Trials comparing these devices generally show that all of them work well, but with some practical differences in speed and handling.

Against the McGrath, the C-MAC tends to be faster. In a trial of patients with potential difficult airways, the C-MAC’s median time to intubation was about 50 seconds versus 67 seconds for the McGrath, despite the McGrath providing more grade-1 (best possible) laryngeal views. The C-MAC also required fewer attempts and was rated easier to use.⁸ A similar pattern emerged in patients with cervical immobilization: the hyperangulated McGrath X-Blade gave better glottic views but took longer (median around 56 seconds versus 44 seconds with the C-MAC Macintosh blade), with no significant difference in first-attempt success.⁹

Against the GlideScope, results are more mixed. In a pediatric study, the C-MAC’s median intubation time was 30 seconds versus 40 seconds for the GlideScope, a statistically significant gap, with equal visualization and no complications in either group.¹⁰ However, for the specialized task of placing double-lumen endobronchial tubes (used in thoracic surgery), neither the GlideScope nor the C-MAC D-Blade outperformed a conventional Macintosh blade; the old-fashioned approach actually had a higher first-attempt success rate for that particular tube.¹¹ That trial is a useful reminder that a better view does not always translate to easier tube delivery, especially with bulky or unusually shaped tubes.

When the C-MAC was compared to the McGrath in obese patients, both devices produced excellent glottic exposure with no failed intubations, and the authors found them comparable.¹² In short, the C-MAC’s Macintosh blade geometry seems to translate to somewhat faster tube placement in many scenarios, likely because the technique closely mirrors what most operators already do with a standard laryngoscope.

Cervical Spine Immobilization

Patients with suspected cervical spine injuries present a double challenge: the neck must be kept still, which restricts the head tilt and jaw thrust that normally open the view during laryngoscopy. The C-MAC has been tested specifically in this scenario. In one trial with manual in-line cervical stabilization, the C-MAC achieved intubation faster than a conventional Macintosh blade (about 33 seconds versus 39 seconds) while also producing better views and requiring fewer optimization maneuvers like external laryngeal pressure.¹³

The D-Blade variant appears to reduce actual cervical spine movement during intubation compared to direct laryngoscopy when a neck collar is in place, which matters for patients where even small neck extensions could worsen a spinal cord injury.¹⁴ One practical detail worth noting: using a stylet with the C-MAC during cervical immobilization significantly reduces intubation difficulty and time. In one study, styletted tubes were placed in a median of 27 seconds versus 52 seconds without a stylet, and the need for a bougie dropped from over 40% to about 3%.¹⁵ Pairing the C-MAC with a pre-shaped stylet in the immobilized patient seems to be the combination that gets the best results.

Rescue After a Failed First Attempt

One of the C-MAC’s strongest use cases is as a backup device when an initial intubation attempt fails. An emergency department study found that after a failed first attempt with any device, switching to the C-MAC for the second attempt was more successful than switching to a standard direct laryngoscope.¹⁶ In a separate case series of 42 patients whose intubation failed with a conventional Macintosh blade, the C-MAC rescued every single one: 86% on the first video attempt and the remaining 14% on a second try.¹⁷ The fact that the C-MAC blade looks and handles much like the Macintosh blade the operator just failed with seems to lower the cognitive switching cost in a stressful moment.

Prehospital and Helicopter Medicine

Using video laryngoscopes outside the hospital introduces problems that don’t exist in a well-lit operating room: rain, wind, vibration, direct sunlight washing out screens, and patients who are not positioned on a conveniently height-adjusted table. The C-MAC has been tested specifically in this environment. A helicopter emergency medicine study found a first-pass success rate of about 88% and an overall success rate above 98% using the C-MAC with a standard Macintosh blade. The study also identified real-world failure modes: direct sunlight on the screen, lens fogging, and blood on the camera all reduced first-pass success.¹⁸

A separate prehospital evaluation involving flight nurses and paramedics showed that among patients who had a poor direct-laryngoscopy view (grade 3 or 4), switching to the C-MAC’s video display converted 88% of them to a good view. The device was functional 100% of the time during intubation, and the overall success rate was 96%.¹⁹ Cardiac arrest patients are a particularly tough subgroup in prehospital care because ongoing chest compressions jostle the patient and worsen the view. In a study comparing CPR and non-CPR intubations, direct laryngoscopy produced an unfavorable view more than a third of the time during CPR, but switching to the C-MAC’s video feed reliably upgraded the view. The odds of first-pass success were roughly 12-fold higher when a favorable glottic view was obtained.²⁰

Neonatal and Pediatric Use

Tiny airways demand tiny blades, and the C-MAC system includes Miller-geometry straight blades down to size 0 for premature infants. In a retrospective analysis of preterm and ex-preterm babies, the size-0 C-MAC Miller blade allowed first-attempt intubation in about 87% of cases with no desaturation, mucosal injury, or bleeding.²¹ A randomized trial comparing the C-MAC Miller blade with the traditional Miller blade in neonates found that the C-MAC delivered a better view of the glottic opening (about 88% POGO score versus 77%) and required external laryngeal manipulation less often, though the actual first-attempt success rates and number of attempts were similar between devices. Intubation did take slightly longer with the C-MAC, roughly 25 seconds versus 20 seconds.²²

Compared to the McGrath MAC in neonates and infants, the C-MAC Miller blade showed similar intubation timings and success rates but again provided superior glottic views. Both devices were deemed safe for routine neonatal intubation.²³ The practical takeaway in neonatal care is that the C-MAC gives everyone in the room, not just the person holding the blade, a clear view of what is happening, which is valuable for teaching and for having a second pair of eyes during a high-stakes procedure.

Awake Intubation

For patients whose airway is expected to be extremely difficult, the safest approach is often to intubate while they are still awake and breathing on their own, using local anesthesia to numb the throat. The traditional tool for this is a flexible fiberoptic bronchoscope, but the C-MAC has been used successfully in awake intubation as well. A case series described patients with predicted extremely difficult airways who were intubated awake with the C-MAC under local anesthesia while breathing spontaneously through a nasal catheter. All intubations succeeded without complications.²⁴ Clinicians who combine both tools, using a fiberoptic bronchoscope as a flexible stylet passed through the vocal cords under C-MAC video guidance, have reported improved intubating conditions and fewer attempts needed.²⁵ ²⁶

Safety Profile

Across the published literature, the C-MAC’s complication rate is consistently low. In studies comparing it with direct laryngoscopy, mucosal trauma tends to be less common with the C-MAC. One trial of intubation in the lateral position recorded mucosal injury in 8 patients with the Macintosh blade but only 1 with the C-MAC, with no dental injuries in either group.²⁷ The blunt trauma ED study found that the C-MAC had a significantly lower rate of esophageal intubation (putting the tube in the wrong pipe) compared to direct laryngoscopy, likely because the video view makes it harder to mistake the esophagus for the trachea.²⁸

One safety concern unique to any video laryngoscope is the temptation to advance the blade while watching the screen rather than looking at the patient’s mouth, which can lead to soft-tissue injury from the blade tip hitting structures the operator cannot feel. This is more of a technique issue than a device flaw, and training materials for the C-MAC emphasize inserting the blade under direct vision before switching attention to the monitor.

Learning Curve and Training Value

Because the standard C-MAC blade mirrors the Macintosh shape, clinicians already comfortable with direct laryngoscopy generally pick it up quickly. A manikin study measured the learning curve: novice users achieved similar intubation times on both the C-MAC and a video stylet by their very first attempt (about 21 seconds), and by the sixth attempt, both devices were significantly faster, settling around 12 to 14 seconds.²⁹ The biggest jump in performance happened within the first few tries, which suggests that the device does not require dozens of practice runs before a clinician can use it effectively.

An underappreciated benefit of the external screen is its role in teaching. With direct laryngoscopy, only the person holding the blade sees the airway. With the C-MAC, a supervisor can watch in real time, offer verbal guidance, and intervene faster if the trainee is heading in the wrong direction. Many residency programs now use the C-MAC as a default teaching laryngoscope for this reason, even when the airway is expected to be straightforward.

What It Costs

The C-MAC system sits in the mid-to-upper range of video laryngoscope pricing. A market analysis of video laryngoscopy equipment estimated the C-MAC monitor at roughly $6,400, with reusable HD imager and blade sets running between about $4,500 and $5,000. Single-use S blades are also available at around $120 each, though these require a separate imager unit costing about $4,160.³⁰ The reusable blade option lowers per-use cost over time but requires proper high-level disinfection between patients. The single-use option simplifies infection control and makes sense in austere settings or when reprocessing infrastructure is limited, but the per-case cost adds up in a busy department. Departments buying into the C-MAC ecosystem are effectively choosing versatility (one monitor, many blade options) over the lower upfront cost of simpler single-use-only systems.

Infection Control During Aerosol-Generating Procedures

Intubation generates aerosols, which became a front-page concern during the COVID-19 pandemic. One feature of the C-MAC that gained new relevance is its separate screen, which allows the operator to maintain more distance from the patient’s airway than a device with an eyepiece or built-in screen would permit.³¹ Some institutions paired the C-MAC with aerosol barrier boxes during the pandemic, though the evidence on whether those boxes actually reduce transmission remains debated. The more durable infection-control advantage is straightforward: a better first-pass success rate means fewer attempts, and fewer attempts mean less time spent near the open airway generating droplets.

1
PubMed. The Storz C-MAC video laryngoscope: description of a new device, case report, and brief case series ↩︎
2
PubMed Central. The comparison of the technical parameters in endotracheal intubation devices: the Cmac, the Vividtrac, the McGrath Mac and the Kingvision ↩︎
3
Anesthesiology. Comparative Effectiveness of the C-MAC Video Laryngoscope versus Direct Laryngoscopy in the Setting of the Predicted Difficult Airway ↩︎
4
PubMed Central. Endotracheal intubation using the C-MAC® video laryngoscope or the Macintosh laryngoscope: a prospective, comparative study in the ICU ↩︎
5
Medicina Intensiva (English Edition). Intubation in the Intensive Care Unit: C-MAC video laryngoscope versus Macintosh laryngoscope ↩︎
6
PubMed Central. Factors Influencing the Time of Intubation Using C-MAC D-Blade® Video Laryngoscope: An Observational Cross-Sectional Study ↩︎
7
Anesthesia & Analgesia. First-Attempt Intubation Success of Video Laryngoscopy in Patients with Anticipated Difficult Direct Laryngoscopy ↩︎
8
British Journal of Anaesthesia. Randomized controlled trial comparing the McGrath videolaryngoscope with the C-MAC videolaryngoscope in intubating adult patients with potential difficult airways ↩︎
9
PubMed. Comparing the first-attempt tracheal intubation success of the hyperangulated McGrath® X-blade vs the Macintosh-type CMAC videolaryngoscope in patients with cervical immobilization ↩︎
10
Innovative Journal of Pediatrics. GlideScope® Versus C-MAC® Video Laryngoscopy in Pediatric Intubation. Does Time Matter? ↩︎
11
PubMed Central. GlideScope® versus C-MAC®(D) videolaryngoscope versus Macintosh laryngoscope for double lumen endotracheal intubation in patients with predicted normal airways ↩︎
12
European Review for Medical and Pharmacological Sciences. Comparison of C-MAC vs. McGrath video laryngoscopes on glottic exposure and endotracheal intubation success with stylet usage in obese patients ↩︎
13
PubMed. Comparison Between C-MAC Video-Laryngoscope and Macintosh Direct Laryngoscope During Cervical Spine Immobilization ↩︎
14
Perioperative Care and Operating Room Management. Airway management for individuals with suspected or confirmed traumatic cervical spine injuries ↩︎
15
PubMed. Clinical evaluation of C-MAC videolaryngoscope with or without use of stylet for endotracheal intubation in patients with cervical spine immobilization ↩︎
16
PubMed. The C-MAC video laryngoscope is superior to the direct laryngoscope for the rescue of failed first-attempt intubations in the emergency department ↩︎
17
Brazilian Journal of Anesthesiology. Effectiveness of the C-MAC video laryngoscope in the management of unexpected failed intubations ↩︎
18
PubMed Central. Analysis of tracheal intubation in out-of-hospital helicopter emergency medicine recorded by video laryngoscopy ↩︎
19
Air Medical Journal. Prehospital Evaluation of the C-MAC Videolaryngoscope ↩︎
20
PubMed. First pass success of tracheal intubation using the C-MAC PM videolaryngoscope as first-line device in prehospital cardiac arrest compared with other emergencies ↩︎
21
PubMed Central. Evaluation of performance of C-MAC® video laryngoscope Miller blade size zero for endotracheal intubation in preterm and ex-preterm infants ↩︎
22
PubMed Central. A randomized comparative evaluation of C-MAC video-laryngoscope with Miller laryngoscope for neonatal endotracheal intubation ↩︎
23
PubMed. Comparative efficacy of C-MAC Miller videolaryngoscope versus McGrath MAC size “1” videolaryngoscope in neonates and infants undergoing surgical procedures under general anesthesia ↩︎
24
Therapeutics and Clinical Risk Management. The use of the C-MAC videolaryngoscope for awake intubation in patients with a predicted extremely difficult airway: case series ↩︎
25
Airway. Innovative Use of Fibreoptic Bronchoscope as a Flexible, Manoeuvrable Stylet during C-MAC Videolaryngoscopy ↩︎
26
Journal of Indian College of Anaesthesiologists. Combined Use of C-MAC Videolaryngoscope and Fiberoptic Bronchoscope for a Challenging Airway ↩︎
27
PubMed Central. Comparison of Macintosh laryngoscope and C-MAC video laryngoscope for intubation in lateral position ↩︎
28
PubMed Central. Comparison of the C-MAC video laryngoscope to the Macintosh laryngoscope for intubation of blunt trauma patients in the ED ↩︎
29
PLoS ONE. Learning curve and performance in simulated difficult airway for the novel C-MAC® video-stylet and C-MAC® Macintosh video laryngoscope ↩︎
30
Military Medicine. Market Analysis of Video Laryngoscopy Equipment for the Role 1 Setting ↩︎
31
PubMed Central. Comparison of aerosol box intubation with C-MAC video laryngoscope and direct laryngoscopy—A randomised controlled trial ↩︎