Oropharyngeal Airway: Uses, Indications, and Risks (2026)

The oropharyngeal airway (OPA) is a commonly used adjunct in respiratory care that helps maintain a patent airway in patients with decreased levels of consciousness. By preventing the tongue from collapsing against the posterior pharyngeal wall, it allows for unobstructed airflow and supports effective ventilation.

This device is frequently used in emergency, prehospital, and critical care settings, particularly during cardiopulmonary resuscitation and bag-mask ventilation.

Understanding its proper use, indications, and limitations is essential for ensuring safe and effective airway management in a variety of clinical scenarios.

What Is an Oropharyngeal Airway?

An oropharyngeal airway is a rigid, curved medical device designed to be inserted into the mouth to maintain airway patency. It is one of the primary types of pharyngeal airways, alongside the nasopharyngeal airway (NPA). While both devices serve a similar purpose, the OPA is specifically used in patients who are unconscious and lack a gag reflex.

The primary function of the OPA is to prevent upper airway obstruction caused by the tongue. In patients with reduced muscle tone, especially those who are unconscious, the tongue can fall backward and block the airway. The OPA mechanically displaces the tongue forward, creating a clear path for air to flow from the mouth into the pharynx.

This device is widely used because it is simple, effective, and quick to insert. It does not require advanced equipment or extensive setup, making it an essential tool in both basic and advanced airway management.

Design and Structure

Oropharyngeal airways are available in a range of sizes to accommodate patients of different ages, from infants to adults. Proper sizing is critical to ensure effectiveness and avoid complications.

Key Components

The OPA consists of several structural features that allow it to function properly:

• Flange: The flange rests outside the patient’s lips and prevents the device from being inserted too far into the airway.
• Curved Body: The body of the airway is curved to match the natural anatomy of the oral cavity and oropharynx. This design allows the device to sit comfortably while maintaining proper positioning.
• Air Channel(s): Depending on the design, the airway may have one central channel or multiple side channels to allow airflow and suctioning of secretions.

Common Types

Two primary types of oropharyngeal airways are used in clinical practice:

• Guedel Airway: This design features a hollow central channel that allows for airflow and easy passage of a suction catheter. It is one of the most commonly used types.
• Berman Airway: This version includes two parallel side channels instead of a central lumen. These channels also allow airflow and facilitate suctioning.

Note: Both designs serve the same purpose but differ slightly in structure and suctioning capability. Clinicians may choose between them based on preference and clinical situation.

Mechanism of Action

The effectiveness of the oropharyngeal airway lies in its ability to prevent obstruction caused by the tongue. In unconscious patients, the muscles that normally keep the airway open lose tone. As a result, the tongue can fall backward and obstruct airflow.

The OPA works by:

• Physically lifting the tongue away from the posterior pharyngeal wall
• Maintaining a clear passage between the mouth and the pharynx
• Allowing air to move freely during spontaneous or assisted ventilation

When properly inserted, the distal tip of the airway rests at the base of the tongue, just above the epiglottis. The flange remains outside the mouth, ensuring that the device stays in place.

This positioning allows the airway to remain open without interfering with normal anatomy or causing unnecessary pressure on surrounding structures.

Indications for Use

The oropharyngeal airway is primarily indicated in patients who are unable to maintain their own airway due to decreased consciousness.

Common Indications

• Unconscious patients without a gag reflex: This is the most common indication. The absence of protective airway reflexes allows for safe insertion of the device.
• Patients requiring bag-mask ventilation: The OPA helps maintain airway patency and improves the effectiveness of ventilation.
• Cardiopulmonary resuscitation (CPR): During resuscitation, the OPA is often used to facilitate ventilation and oxygen delivery.
• Advanced cardiovascular life support (ACLS): It serves as a supportive airway adjunct in emergency protocols.
• Seizure patients (unconscious): The device may help prevent the patient from biting the tongue once the seizure has subsided and the patient is unresponsive.
• Orally intubated patients: It can function as a bite block to prevent damage to an endotracheal tube.

Note: These indications highlight the OPA’s role as a temporary airway adjunct rather than a definitive airway device.

Contraindications

Although the OPA is useful in many situations, it is not appropriate for all patients.

Absolute Contraindications

• Conscious or semiconscious patients: The presence of a gag reflex makes insertion unsafe.

Risks in These Patients

• Gagging
• Vomiting
• Aspiration
• Laryngospasm

Additional Contraindications

• Oral trauma
• Facial fractures involving the mandible or maxilla
• Presence of foreign bodies in the oral cavity
• Space-occupying lesions in the mouth or pharynx

Note: In these situations, alternative airway devices such as a nasopharyngeal airway may be more appropriate.

Sizing and Selection

Selecting the correct size is essential for proper function and patient safety. Incorrect sizing can worsen airway obstruction or cause injury.

Measurement Technique

The correct size is determined by measuring:

• From the corner of the mouth to the angle of the jaw

Note: This measurement corresponds to the length of the airway needed to properly position the distal tip at the base of the tongue.

Importance of Proper Sizing

• Too small: May push the tongue backward and worsen obstruction
• Too large: May extend too far and potentially obstruct the airway or cause trauma

Note: A properly sized OPA ensures effective airway patency without causing harm.

Equipment and Preparation

Before inserting an oropharyngeal airway, it is important to ensure that the equipment is ready and appropriate for use.

Equipment Checklist

• Correct size OPA
• Suction equipment
• Bag-valve mask if ventilation is required
• Personal protective equipment

Pre-Insertion Assessment

• Confirm the patient is unconscious
• Assess for absence of gag reflex
• Inspect the oral cavity for obstruction or trauma
• Choose the correct size airway

Note: Proper preparation reduces the risk of complications and improves the likelihood of successful placement.

Insertion Techniques

There are several accepted methods for inserting an oropharyngeal airway. Each technique aims to position the airway correctly without pushing the tongue further into the airway.

1. Rotation Method (180-Degree Technique)

• Insert the airway upside down with the tip pointing toward the hard palate
• Advance the device into the mouth
• Rotate it 180 degrees as it reaches the soft palate
• Continue advancing until the flange rests at the lips

Note: This method uses the rotation to move the tongue out of the way.

2. Tongue Depressor Method

• Use a tongue blade to lift the tongue forward
• Insert the airway following its natural curve
• Advance until properly positioned

Note: This method is often preferred in pediatric patients to reduce trauma.

3. Side Insertion (90-Degree Method)

• Insert the airway sideways
• Rotate it 90 degrees into position as it advances

Note: Each technique has the same goal of avoiding posterior displacement of the tongue.

Complications and Risks

Although the oropharyngeal airway is a simple device, improper use can lead to significant complications. Understanding these risks is essential for safe clinical practice.

Common Complications

• Gagging and vomiting: This is the most frequent complication and occurs when the device is inserted in a patient with an intact gag reflex.
• Aspiration: If vomiting occurs, there is a risk that gastric contents may enter the lungs, leading to aspiration pneumonia.
• Airway trauma: Improper insertion can cause injury to the lips, teeth, tongue, or pharyngeal tissues.
• Worsened airway obstruction: An incorrectly sized airway may push the tongue backward instead of lifting it, further obstructing airflow.
• Laryngospasm: Stimulation of the airway in sensitive patients may trigger reflex closure of the vocal cords.

Device-Related Issues

• Obstruction of the airway channel: Secretions, blood, or debris can block the lumen of the airway, reducing its effectiveness.
• Improper placement: If the airway is not positioned correctly, it may fail to maintain patency or cause discomfort and injury.

Note: Because of these risks, continuous monitoring is required after placement. If complications arise, the device should be removed immediately and alternative airway management strategies should be considered.

Monitoring and Ongoing Management

After insertion of an oropharyngeal airway, clinicians must continuously assess the patient to ensure that the device is functioning properly.

Key Monitoring Parameters

• Airway patency: Confirm that air is moving freely through the airway.
• Breath sounds: Listen for adequate ventilation and equal air entry.
• Chest rise: Observe for symmetrical chest expansion during ventilation.
• Oxygenation status: Monitor oxygen saturation levels.
• Presence of secretions: Ensure that the airway is not obstructed by mucus or debris.

Suctioning

The OPA allows for suctioning of oral secretions, which is important for maintaining a clear airway. Regular suctioning may be necessary, especially in patients with excessive secretions.

Reassessment

Frequent reassessment is necessary to determine whether the airway is still needed. As the patient’s condition improves, continued use of the OPA may become inappropriate.

Removal of the Oropharyngeal Airway

The oropharyngeal airway should be removed as soon as it is no longer indicated.

Indications for Removal

• Return of consciousness
• Presence of a gag reflex
• Patient intolerance
• Signs of complications

Removal Technique

• Gently remove the airway following the natural curvature
• Be prepared to suction if the patient begins to gag or vomit
• Reassess airway patency after removal

Note: Prompt removal is essential to reduce the risk of aspiration and discomfort.

Clinical Applications

The OPA is widely used across multiple healthcare settings due to its simplicity and effectiveness.

• Emergency Medicine: In emergency situations, the OPA is often one of the first airway adjuncts used. It helps rapidly restore airway patency and supports ventilation during resuscitation efforts.
• Prehospital Care: Emergency medical services frequently rely on OPAs when managing unconscious patients in the field. The device is easy to use and requires minimal equipment.
• Critical Care: In intensive care units, OPAs may be used in patients with decreased levels of consciousness to maintain airway patency and facilitate suctioning.
• Operating Rooms and Recovery Units: The OPA is commonly used during anesthesia and in the postoperative period when patients may not be fully awake and are at risk of airway obstruction.

Role in Airway Management

The oropharyngeal airway plays an important role within the broader framework of airway management.

Basic Airway Adjunct

The OPA is considered a basic airway adjunct. It is often used after initial airway maneuvers such as:

• Head tilt and chin lift
• Jaw thrust

Note: It enhances the effectiveness of these techniques by maintaining a clear airway.

Support for Ventilation

The OPA improves the efficiency of bag-mask ventilation by preventing airway obstruction. This allows for better delivery of oxygen and ventilation.

Adjunct to Advanced Airways

Although not a definitive airway, the OPA can be used alongside advanced airway devices. For example:

• As a bite block in intubated patients
• To facilitate suctioning

Note: It does not provide protection against aspiration and should not be considered a substitute for definitive airway management when required.

Comparison With Other Airway Devices

The oropharyngeal airway is one of several tools available for airway management. Understanding how it compares to other devices is important for selecting the appropriate intervention.

Oropharyngeal vs. Nasopharyngeal Airway

• OPA: Inserted through the mouth; Used in unconscious patients without a gag reflex.
• Nasopharyngeal Airway (NPA): Inserted through the nose; Can be used in conscious or semiconscious patients.

Note: The NPA is often chosen when the gag reflex is present or when oral access is not possible.

Oropharyngeal Airway vs. Endotracheal Tube

• OPA: Noninvasive; Does not secure the airway; Does not protect against aspiration.
• Endotracheal Tube: Invasive; Provides a secure airway; Protects against aspiration.

Note: The OPA is a temporary measure, while endotracheal intubation is used for definitive airway control.

Oropharyngeal Airway vs. Tracheostomy Tube

• OPA: Short-term use; Simple insertion.
• Tracheostomy Tube: Long-term airway management; Surgically placed.

Note: Each device has a specific role depending on the patient’s condition and clinical needs.

Key Concepts for Clinical Practice

Several important principles should be remembered when using an oropharyngeal airway:

• It is indicated for unconscious patients without a gag reflex
• Proper sizing is essential for effectiveness and safety
• Incorrect use can worsen airway obstruction
• It does not provide a definitive airway
• Continuous monitoring is required after placement
• The device should be removed once the patient regains consciousness

Note: These concepts are frequently tested in clinical practice and on board examinations.

Oropharyngeal Airway Practice Questions

1. What is the primary purpose of an oropharyngeal airway (OPA)?
To maintain airway patency by preventing the tongue from obstructing the posterior pharynx.

2. In which type of patient is an oropharyngeal airway most commonly used?
Unconscious patients without an intact gag reflex.

3. What is the most common cause of airway obstruction that an OPA relieves?
The tongue falling backward against the posterior pharyngeal wall.

4. What level of airway management does the OPA represent?
A basic airway adjunct.

5. Does an OPA provide a definitive airway?
No, it does not secure the airway or protect against aspiration.

6. What is the primary mechanism of action of an OPA?
It lifts the tongue away from the posterior pharyngeal wall.

7. Where should the distal tip of a properly placed OPA rest?
At the base of the tongue above the epiglottis.

8. What part of the OPA prevents it from being inserted too far?
The flange.

9. What are the two main types of oropharyngeal airways?
Guedel and Berman airways.

10. What is a key feature of the Guedel airway?
A central hollow channel that allows airflow and suctioning.

11. What is a key feature of the Berman airway?
Two parallel side channels that allow airflow and suctioning.

12. What material are most OPAs made from?
Rigid plastic

13. Why is selecting the correct OPA size important?
To avoid airway obstruction or tissue injury.

14. How is the correct size OPA determined?
By measuring from the corner of the mouth to the angle of the jaw.

15. What can occur if the OPA is too small?
It may push the tongue backward and worsen obstruction.

16. What can occur if the OPA is too large?
It may obstruct the airway or cause trauma to the airway structures.

17. What is a major contraindication for OPA use?
An intact gag reflex.

18. Why should an OPA not be used in conscious patients?
It can trigger gagging, vomiting, and possible aspiration.

19. What reflex indicates that an OPA should not be inserted?
The gag reflex.

20. What is a common use of an OPA during resuscitation?
To facilitate airway patency during CPR.

21. How does an OPA assist with bag-mask ventilation?
By keeping the airway open and improving airflow.

22. What additional function does an OPA provide besides maintaining airflow?
It allows suctioning of oral secretions.

23. What insertion technique involves rotating the airway 180 degrees?
The rotation method.

24. What is the purpose of rotating the OPA during insertion?
To prevent pushing the tongue backward into the airway.

25. What insertion method uses a tongue depressor?
The anatomic method.

26. In which patient population is the tongue depressor method often preferred?
Pediatric patients.

27. What is the side insertion method also known as?
The 90-degree rotation method.

28. What is the goal of all OPA insertion techniques?
To position the airway without displacing the tongue posteriorly.

29. What complication can result from improper OPA insertion?
Worsened airway obstruction.

30. What is the most common complication associated with OPA use?
Gagging and vomiting.

31. What clinical condition commonly leads to loss of airway muscle tone?
Unconsciousness

32. What type of airway obstruction does an OPA specifically address?
Upper airway obstruction caused by the tongue.

33. When should an OPA be considered during airway management?
When basic airway maneuvers fail to maintain patency.

34. What basic airway maneuvers are typically attempted before inserting an OPA?
Head tilt–chin lift or jaw thrust.

35. What must be assessed before inserting an OPA?
Level of consciousness and presence of a gag reflex.

36. What is the purpose of the flange on an OPA?
To prevent the device from advancing too far into the airway.

37. What anatomical region does an OPA help keep open?
The oropharynx.

38. Why is suction equipment often prepared before OPA insertion?
To clear secretions and maintain airway patency.

39. What can obstruct the lumen of an OPA?
Secretions, blood, or debris.

40. What should be done if the OPA becomes obstructed?
Remove it immediately and clear the airway.

41. What is a key advantage of using an OPA in emergency settings?
It is quick and easy to insert.

42. What is the role of the OPA in oxygen delivery?
It facilitates effective ventilation and oxygenation.

43. What should be continuously monitored after OPA insertion?
Airway patency and overall patient status.

44. What physical sign indicates effective ventilation with an OPA?
Visible chest rise.

45. What should be assessed to confirm adequate air movement?
Breath sounds

46. What monitoring tool is commonly used to assess oxygenation?
Pulse oximetry

47. What is a risk if vomiting occurs while an OPA is in place?
Aspiration

48. What is laryngospasm?
A reflex closure of the vocal cords.

49. What can trigger laryngospasm during OPA use?
Airway stimulation in sensitive or partially conscious patients.

50. What type of trauma can occur during OPA insertion?
Injury to the lips, teeth, or oral tissues.

51. Why is proper technique important when inserting an OPA?
To avoid pushing the tongue further into the airway.

52. What indicates that an OPA may no longer be needed?
Return of consciousness or gag reflex.

53. What should be done if a patient begins to gag with an OPA in place?
Remove the airway immediately.

54. What is the purpose of reassessing the patient after OPA placement?
To evaluate effectiveness and determine ongoing need.

55. What is one benefit of using an OPA in intubated patients?
It can function as a bite block to protect the endotracheal tube.

56. What airway device is more appropriate if a gag reflex is present?
A nasopharyngeal airway.

57. Through which route is an OPA inserted?
Through the mouth.

58. What is the main limitation of an OPA?
It does not protect against aspiration.

59. In which setting is an OPA commonly used by first responders?
Prehospital or emergency care.

60. What is the primary goal of airway management using an OPA?
To maintain a clear and open airway.

61. How is an oropharyngeal airway (OPA) classified as an airway device?
As a pharyngeal airway adjunct.

62. What happens to airway muscle tone in unconscious patients?
It decreases or is lost.

63. What structure commonly collapses and causes airway obstruction in unconscious patients?
The tongue.

64. What airflow pathway is maintained by an OPA?
A passage from the mouth to the pharynx.

65. Why is the OPA considered a temporary airway device?
Because it does not provide long-term airway security or protection.

66. What should be confirmed before selecting the correct OPA size?
Appropriate anatomical measurement based on patient landmarks.

67. What anatomical landmark is used to size an OPA?
The angle of the jaw.

68. What can occur if an OPA extends too far into the airway?
Airway obstruction or tissue injury.

69. What is the purpose of the curved design of an OPA?
To conform to the natural anatomy of the oral cavity.

70. Which type of patient is least likely to tolerate an OPA?
A conscious or semi-conscious patient.

71. What reflex helps protect the airway in conscious individuals?
The gag reflex.

72. What is a major benefit of using an OPA during assisted ventilation?
It reduces upper airway resistance.

73. What type of ventilation is commonly performed with an OPA in place?
Bag-mask ventilation

74. What clinical condition often necessitates airway support with an OPA?
Decreased level of consciousness.

75. What is a risk of forcing an improperly sized OPA into position?
Airway trauma or worsening obstruction.

76. What should be assessed immediately after OPA insertion?
Effectiveness of ventilation.

77. What finding may indicate airway obstruction despite OPA placement?
Diminished or absent breath sounds.

78. What physical sign suggests inadequate ventilation with an OPA?
Poor or absent chest rise.

79. What must be ensured before using suction through an OPA?
That the airway lumen is patent.

80. What can accumulate in the airway if suctioning is not performed?
Secretions or debris.

81. Why is an OPA commonly used during anesthesia?
Because patients may lose protective airway reflexes.

82. What is a risk of leaving an OPA in place too long?
Gagging, vomiting, or aspiration.

83. What should be done if a patient begins to regain consciousness with an OPA in place?
Remove the airway immediately.

84. What is the primary purpose of monitoring after OPA placement?
To ensure continued airway patency and effective ventilation.

85. What is one advantage of the Berman airway design?
Side channels help guide suction catheters.

86. What is one advantage of the Guedel airway design?
A central lumen allows efficient suctioning.

87. What should be checked before inserting an OPA?
The oral cavity for obstructions such as foreign bodies.

88. What complication can result from improper OPA insertion technique?
Injury to oral structures such as teeth or mucosa.

89. What airway device is preferred when oral access is limited or contraindicated?
A nasopharyngeal airway.

90. What type of airway protection does an OPA provide?
It does not protect against aspiration.

91. What is the preferred head position when inserting an OPA in most patients?
The head-tilt, chin-lift position unless contraindicated.

92. What maneuver is preferred if a cervical spine injury is suspected before OPA insertion?
The jaw-thrust maneuver.

93. What should be done if resistance is met during OPA insertion?
Reassess size and technique rather than forcing insertion.

94. What is a potential dental complication during OPA insertion?
Damage to teeth or dental prosthetics.

95. How can correct OPA placement be verified clinically?
Improved airflow with visible chest rise and equal breath sounds.

96. What is the effect of an OPA on upper airway resistance during ventilation?
It decreases resistance by maintaining airway patency.

97. What should be done if secretions accumulate around the OPA?
Suction the airway promptly.

98. What is the role of the OPA during bag-valve-mask ventilation?
To maintain an open airway and improve ventilation effectiveness.

99. What complication may occur if the OPA presses against the soft tissues excessively?
Pressure injury or mucosal damage.

100. What is the key goal of using an OPA in emergency airway management?
To rapidly establish and maintain a patent airway.

Final Thoughts

The oropharyngeal airway is a fundamental tool in respiratory care that provides a simple and effective way to maintain airway patency in unconscious patients. Its ability to prevent tongue-related obstruction makes it invaluable during emergency situations and assisted ventilation.

However, proper patient selection, sizing, and insertion technique are essential to avoid complications such as aspiration and airway trauma.

While it serves as a useful adjunct, it does not replace the need for definitive airway management when indicated. Clinicians must use the OPA thoughtfully and monitor patients closely to ensure safe and effective outcomes.