Bite Block: Clinical Uses in Airway Management (2026)

Airway management requires careful attention to both ventilation and patient safety, especially in situations where involuntary movements or reflexes can compromise an artificial airway. A bite block is a simple yet essential device used to prevent patients from occluding an endotracheal tube or damaging oral structures by biting.

Commonly used in intubated patients, those receiving mechanical ventilation, or during procedures involving the airway, bite blocks play a key role in maintaining airway patency and protecting critical equipment.

This article explores the clinical uses of bite blocks, their indications, and their importance in modern respiratory care.

What Is a Bite Block?

A bite block is a rigid device placed between a patient’s teeth to prevent them from biting down on airway equipment. It is most commonly used in patients with an endotracheal tube or during procedures that involve inserting instruments into the airway.

The primary purpose of a bite block is protective. It creates a barrier between the patient’s teeth and the airway device, reducing the risk of occlusion or damage. In many cases, the function of a bite block is performed by an oropharyngeal airway rather than a separate device.

Bite blocks are typically made of firm plastic that can withstand significant biting force. This rigidity ensures that the airway remains open and that equipment is not compromised during use.

Role in Airway Management

One of the most important functions of a bite block is preventing airway obstruction. Patients who are intubated or have decreased levels of consciousness may involuntarily bite down on an endotracheal tube.

When this happens, several complications can occur:

• Partial or complete obstruction of airflow
• Increased airway resistance
• Inadequate ventilation
• Risk of hypoxia

Note: By preventing the patient from biting the tube, the bite block helps maintain a clear and functional airway.

Protecting Airway Equipment

Endotracheal tubes and bronchoscopes are essential tools in respiratory care, but they are also vulnerable to damage. A strong bite can compress or fracture these devices, rendering them ineffective.

A bite block protects:

• Endotracheal tubes from occlusion or deformation
• Bronchoscopes from structural damage
• Oral tissues from trauma caused by biting

Note: This protection is especially important during procedures or in patients who are agitated or semi-conscious.

Use During Endotracheal Intubation

After an endotracheal tube is successfully inserted and placement is confirmed, it must be secured to prevent displacement. At this stage, a bite block may be used as part of the stabilization process.

Patients recovering from sedation or anesthesia may begin to regain muscle tone and reflex activity. This can lead to involuntary biting, which poses a risk to both the airway and the patient.

Placing a bite block at this point helps:

• Maintain airway patency
• Prevent tube occlusion
• Reduce the risk of accidental extubation

Patients at Higher Risk of Biting

Certain patient populations are more likely to require a bite block, including:

• Semi-conscious patients
• Agitated or restless patients
• Patients emerging from anesthesia
• Individuals with neurological impairment

Note: In these cases, the bite block serves as a preventive measure rather than a reactive one.

Relationship to Oropharyngeal Airways

In many clinical settings, a bite block is not used as a separate device. Instead, an oropharyngeal airway performs the same function.

An oropharyngeal airway provides two key benefits:

• Maintains airway patency by preventing the tongue from obstructing the airway
• Acts as a bite block to protect airway devices

Note: This dual functionality makes it a practical and efficient choice in airway management.

Clinical Implications

Using an oropharyngeal airway as a bite block simplifies equipment needs and reduces the number of devices required during patient care.

However, it is important to recognize that:

• Not all patients tolerate an oropharyngeal airway
• Proper sizing is critical for effectiveness
• The presence of a gag reflex is a contraindication

Note: Understanding when and how to use this dual-purpose device is essential for safe practice.

Use During Bronchoscopy

Flexible bronchoscopy involves inserting a thin, delicate scope into the airway for diagnostic or therapeutic purposes. Because the bronchoscope is fragile, it is highly susceptible to damage if the patient bites down.

A bite block is routinely used during bronchoscopy to:

• Prevent damage to the scope
• Maintain access to the airway
• Reduce interruptions during the procedure

Patient Safety Considerations

During bronchoscopy, patients may be awake, sedated, or semi-conscious. Even with sedation, reflexive biting can occur.

A bite block helps prevent:

• Injury to the patient’s teeth or oral tissues
• Damage to the bronchoscope
• Sudden airway compromise

Note: Its use is considered standard practice in many bronchoscopy procedures.

Indications for Use

A bite block is indicated in several clinical situations where there is a risk of airway device occlusion or damage.

Common Indications

• Patients with an endotracheal tube
• Individuals undergoing bronchoscopy
• Unconscious patients without a gag reflex
• Patients experiencing seizures
• Agitated or semi-conscious individuals

Note: In each of these scenarios, the risk of biting is significant enough to justify the use of a bite block.

Contraindications and Precautions

A bite block, especially when in the form of an oropharyngeal airway, should not be used in patients who are fully conscious and have an intact gag reflex.

Using it in these patients can lead to:

• Gagging
• Vomiting
• Increased risk of aspiration

Precautions

Even when indicated, care must be taken to ensure proper use.

Key precautions include:

• Selecting the correct size
• Monitoring for signs of discomfort or injury
• Removing the device when no longer needed

Note: Failure to follow these precautions can result in complications that outweigh the benefits.

Design and Materials

Bite blocks are designed to be strong, durable, and capable of maintaining their shape under pressure.

Key Features

• Made from rigid plastic or similar materials
• Resistant to compression from biting
• Available in various sizes for different patients
• May be standalone or integrated into airway devices

Note: Some modern endotracheal tube holders include built-in bite blocks, which improve convenience and reduce the need for additional equipment.

Proper Sizing and Placement

When a bite block is part of an oropharyngeal airway, proper sizing is critical. The correct size is typically determined by measuring from the patient’s lips to the angle of the jaw.

Risks of Improper Sizing

Incorrect sizing can lead to serious complications:

Too large:

• May obstruct the airway
• Can cause trauma to the pharynx

Too small:

• May push the tongue backward
• Can worsen airway obstruction

Placement Technique

Proper placement involves:

• Ensuring the device sits securely between the teeth
• Avoiding excessive pressure on oral structures
• Confirming that the airway remains patent

Note: Careful attention to these details ensures that the device functions as intended.

Role of the Respiratory Therapist

Respiratory therapists play a central role in the use and management of bite blocks.

Responsibilities

• Selecting the appropriate device and size
• Ensuring proper placement
• Monitoring for complications
• Removing the device when appropriate

Note: During procedures such as bronchoscopy, the therapist is also responsible for preparing equipment and maintaining patient safety throughout the process.

Integration With Other Airway Devices

A bite block is rarely used in isolation. Instead, it is part of a broader system of airway management.

Commonly Used Alongside

• Endotracheal tubes
• Oropharyngeal airways
• Mechanical ventilators
• Bronchoscopes

Note: Its role is supportive, enhancing the effectiveness and safety of these devices rather than replacing them.

Clinical Importance

Although it is a simple device, the bite block has a significant impact on patient care.

Key Benefits

• Maintains airway patency
• Protects critical equipment
• Reduces the risk of complications
• Supports efficient procedures

Note: Its repeated use in multiple clinical contexts highlights its value in respiratory care.

Complications and Potential Risks

Although a bite block is a relatively simple device, improper use can lead to complications. These risks are generally preventable with appropriate patient selection, correct sizing, and ongoing monitoring.

Oral and Dental Injury

One of the most common concerns is injury to the teeth, gums, or surrounding oral tissues. If the bite block is positioned incorrectly or applies excessive pressure, it may cause:

• Gum irritation or ulceration
• Pressure sores on the lips or tongue
• Dental damage in patients with fragile teeth

Note: Careful placement and routine reassessment help minimize these risks.

Airway Obstruction

While the purpose of a bite block is to maintain airway patency, improper sizing or positioning can have the opposite effect. A device that is too large may obstruct the airway, while one that is too small may push the tongue backward.

This highlights the importance of proper sizing and continuous monitoring, especially in patients with changing levels of consciousness.

Gagging and Aspiration

In patients with an intact gag reflex, a bite block or oropharyngeal airway can stimulate gagging or vomiting. This increases the risk of aspiration, which can lead to serious complications such as pneumonia.

For this reason, bite blocks should only be used in appropriate patients, typically those who are unconscious or lack a gag reflex.

Device-Related Pressure Injuries

Prolonged use of a bite block without repositioning or reassessment may result in localized pressure injuries. These can develop over time, particularly in critically ill patients who require extended airway support.

Preventive strategies include:

• Regular repositioning
• Frequent oral care
• Periodic evaluation of device necessity

Monitoring and Ongoing Assessment

The use of a bite block is not a one-time intervention. It requires continuous monitoring to ensure that it remains effective and does not cause harm.

Key Monitoring Considerations

Healthcare providers should regularly assess:

• Airway patency and ventilation effectiveness
• Proper positioning of the device
• Signs of oral or tissue injury
• Patient comfort and tolerance

Note: Monitoring is especially important in patients who are regaining consciousness, as their tolerance for the device may change.

When to Remove the Bite Block

A bite block should be removed when it is no longer necessary. This typically occurs when:

• The patient regains consciousness
• The gag reflex returns
• The risk of biting decreases

Note: Leaving the device in place longer than needed can increase the risk of complications and patient discomfort.

Bite Blocks in Mechanically Ventilated Patients

Patients receiving mechanical ventilation through an endotracheal tube are among the most common candidates for bite block use. In these patients, maintaining a patent airway is critical for effective ventilation.

Biting on the tube can:

• Obstruct airflow
• Increase airway pressures
• Trigger ventilator alarms
• Compromise gas exchange

Note: A bite block helps prevent these issues and ensures consistent delivery of ventilatory support.

Interaction With Ventilator Settings

When a patient bites down on an endotracheal tube, it may cause changes in ventilator parameters, such as:

• Increased peak inspiratory pressure
• Reduced tidal volume delivery
• Activation of high-pressure alarms

Note: By preventing tube occlusion, the bite block helps maintain stable ventilator performance and reduces the likelihood of false alarms.

Use in Emergency and Critical Care Settings

In emergency situations, rapid airway stabilization is a priority. A bite block may be used immediately after intubation to protect the airway and prevent complications.

In these settings, its benefits include:

• Quick and effective airway protection
• Reduced risk of tube damage
• Improved patient safety during transport

Intensive Care Unit Applications

In the intensive care unit, patients often require prolonged airway support. Bite blocks are commonly used in these patients to maintain airway integrity over time.

However, prolonged use requires careful management to avoid complications. Regular reassessment and proper oral care are essential components of care in this setting.

Differences Between Standalone Bite Blocks and Integrated Devices

Standalone Bite Blocks

Standalone bite blocks are separate devices specifically designed to prevent biting. They are typically inserted between the teeth and may be used in a variety of clinical situations.

Advantages include:

• Simple design
• Easy placement
• Versatility across different procedures

Integrated Bite Blocks

Many modern airway management systems incorporate bite blocks into their design. For example, some endotracheal tube holders include built-in bite blocks.

Advantages of integrated systems include:

• Reduced need for additional equipment
• Improved stability of the airway device
• Streamlined setup

Note: Both types are effective, and the choice depends on clinical preference and patient needs.

Bite Block Use in Special Populations

Pediatric Patients

In pediatric patients, airway management requires special consideration due to smaller anatomy and increased sensitivity.

When using a bite block in children:

• Proper sizing is critical
• Gentle placement is required
• Continuous monitoring is essential

Note: In some cases, alternative strategies may be preferred depending on the child’s condition.

Neurological Patients

Patients with neurological conditions, such as seizures or traumatic brain injury, are at increased risk of involuntary biting.

In these patients, a bite block can:

• Prevent tongue injury
• Protect airway devices
• Maintain airway patency

Note: Careful monitoring is necessary to ensure that the device does not cause additional complications.

Infection Control and Hygiene

Patients with bite blocks, especially those who are intubated, require regular oral care to prevent infection and maintain tissue integrity.

Oral care practices include:

• Cleaning the oral cavity
• Moisturizing oral tissues
• Inspecting for signs of infection or injury

Device Cleaning and Replacement

Bite blocks should be:

• Cleaned or replaced according to facility protocols
• Monitored for wear or damage
• Removed if contamination is suspected

Note: Proper hygiene practices reduce the risk of infection and improve overall patient outcomes.

Clinical Decision-Making and Best Practices

The decision to use a bite block should be based on a thorough assessment of the patient. Factors to consider include:

• Level of consciousness
• Presence of an artificial airway
• Risk of biting or agitation
• Overall clinical condition

Best Practices for Use

To ensure safe and effective use, clinicians should:

• Select the appropriate device and size
• Ensure proper placement
• Monitor the patient closely
• Remove the device when no longer needed

Note: Following these practices helps maximize benefits while minimizing risks.

Key Takeaways

For students preparing for exams, the bite block is an important concept that integrates several key principles of respiratory care.

• A bite block prevents patients from biting airway devices
• It is commonly associated with oropharyngeal airways
• It is indicated in unconscious or intubated patients
• It is contraindicated in conscious patients with a gag reflex
• Proper sizing is essential for safe use

Bite Block Practice Questions

1. What is a bite block?
A device placed between the teeth to prevent patients from biting airway equipment.

2. What is the primary purpose of a bite block?
To protect airway devices and maintain airway patency by preventing biting.

3. In which patients is a bite block most commonly used?
Intubated, unconscious, or semi-conscious patients.

4. What airway device is commonly protected by a bite block?
Endotracheal tube

5. What can happen if a patient bites an endotracheal tube?
Airway obstruction, tube damage, and impaired ventilation.

6. Which airway adjunct often serves as a bite block?
Oropharyngeal airway

7. What is a secondary function of an oropharyngeal airway?
Acting as a bite block.

8. Why is a bite block important during bronchoscopy?
To prevent damage to the bronchoscope from biting.

9. What type of material is a bite block typically made from?
Rigid plastic

10. Why must a bite block be rigid?
To withstand strong biting forces without collapsing.

11. What is a major contraindication for using a bite block?
Conscious patients with an intact gag reflex.

12. What can occur if a bite block is used in a conscious patient?
Gagging, vomiting, and aspiration risk.

13. How does a bite block help maintain airway patency?
By preventing occlusion of airway devices from biting.

14. What role does a bite block play in mechanical ventilation?
It prevents tube occlusion and ensures consistent airflow.

15. What ventilator issue can occur if a patient bites the tube?
Increased peak inspiratory pressure.

16. What is one risk of improper bite block sizing?
Airway obstruction

17. What happens if a bite block is too large?
It may obstruct the airway or cause trauma.

18. What happens if a bite block is too small?
It may push the tongue backward and worsen obstruction.

19. How is proper sizing of an oropharyngeal airway determined?
Measuring from the lips to the angle of the jaw.

20. What complication can prolonged use of a bite block cause?
Pressure injuries to oral tissues.

21. What type of patients are at risk of biting airway devices?
Agitated, semi-conscious, or neurologically impaired patients.

22. What is the role of the respiratory therapist regarding bite blocks?
To select, place, monitor, and remove the device appropriately.

23. When should a bite block be removed?
When the patient regains consciousness or no longer needs it.

24. What type of procedure commonly requires a bite block?
Flexible bronchoscopy

25. What is one benefit of integrated bite blocks in ET tube holders?
They reduce the need for separate devices.

26. What is the main function of a bite block during intubation stabilization?
To prevent the patient from biting and occluding the endotracheal tube.

27. Why are semi-conscious patients at risk of biting airway devices?
Because they may have involuntary jaw reflexes or agitation.

28. What type of airway does a bite block NOT provide?
A definitive airway.

29. Does a bite block protect against aspiration?
No, it does not prevent aspiration.

30. What can biting an endotracheal tube lead to in terms of oxygenation?
Hypoxia due to reduced airflow.

31. What is one sign that a patient may be biting the endotracheal tube?
Sudden increase in airway pressure alarms.

32. How can a bite block improve procedural efficiency?
By preventing interruptions caused by equipment damage or obstruction.

33. What is a common setting where bite blocks are used for extended periods?
The intensive care unit.

34. What should be assessed regularly when a bite block is in place?
Positioning and signs of oral tissue injury.

35. Why is oral care important in patients with a bite block?
To prevent infection and maintain tissue integrity.

36. What is one risk of leaving a bite block in place too long?
Development of pressure sores.

37. What type of patients may require a bite block during seizures?
Patients at risk of biting their tongue or airway devices.

38. What is one advantage of a standalone bite block?
It can be used independently of other airway devices.

39. What is one advantage of an integrated bite block?
It simplifies airway device setup.

40. What type of injury can occur if a bite block is improperly positioned?
Soft tissue trauma.

41. What is the purpose of a bite block during transport of an intubated patient?
To prevent tube occlusion and maintain airway security.

42. What can happen to a bronchoscope if a bite block is not used?
It may be damaged or crushed by biting.

43. What patient reflex increases the risk of gagging with a bite block?
The gag reflex.

44. What must be present before using an oropharyngeal airway as a bite block?
Absence of a gag reflex.

45. What is the role of a bite block in airway protection?
It protects the airway device from occlusion due to biting.

46. What should be done if a patient shows discomfort with a bite block?
Reassess placement or remove if no longer indicated.

47. What is one key feature of modern ET tube holders regarding bite blocks?
They often include built-in bite blocks.

48. What can improper bite block use cause in terms of ventilation?
Inadequate ventilation.

49. What is one reason a bite block is used in agitated patients?
To prevent damage to airway equipment.

50. What should always accompany bite block use in critical care?
Continuous patient monitoring.

51. What is a key reason for using a bite block in intubated patients?
To prevent occlusion of the endotracheal tube from biting.

52. What type of patients commonly lose the ability to control jaw movement?
Unconscious or neurologically impaired patients.

53. What is one complication of biting an airway device during ventilation?
Reduced tidal volume delivery.

54. What is the primary airway structure affected when a tongue falls back?
The posterior pharynx.

55. How does an oropharyngeal airway help prevent airway obstruction?
By keeping the tongue from collapsing into the airway.

56. What should be checked first if high-pressure alarms occur on a ventilator?
Whether the patient is biting the endotracheal tube.

57. What is one reason a bite block is used during awake procedures?
To prevent reflexive biting.

58. What type of bronchoscopy requires a bite block?
Flexible bronchoscopy

59. What is one risk of not using a bite block during bronchoscopy?
Damage to the bronchoscope.

60. What is one advantage of using an oropharyngeal airway over a separate bite block?
It provides both airway patency and bite protection.

61. What must be evaluated before inserting a bite block?
The patient’s level of consciousness.

62. What airway complication can result from tongue displacement caused by improper sizing?
Airway obstruction

63. What is one purpose of measuring from the lips to the jaw angle?
To select the correct size airway device.

64. What is one sign of oral tissue damage from a bite block?
Ulceration or redness.

65. What is one goal of airway adjuncts like bite blocks?
To support effective ventilation.

66. What should be avoided when placing a bite block?
Excessive pressure on oral structures.

67. What type of care should be performed frequently in patients with airway devices?
Oral hygiene care.

68. What is one factor that increases the likelihood of biting?
Agitation or restlessness.

69. What should be done if a bite block becomes damaged?
Replace it immediately.

70. What is one reason for using a bite block in neurological patients?
To prevent tongue or device injury.

71. What is the effect of tube occlusion on gas exchange?
It impairs oxygen and carbon dioxide exchange.

72. What is one setting where bite blocks are commonly used during procedures?
The operating room.

73. What is one key responsibility of healthcare providers using bite blocks?
Monitoring for complications.

74. What is one sign that a bite block may be improperly placed?
Patient discomfort or airway compromise.

75. What is one benefit of preventing biting during ventilation?
Maintaining consistent airflow.

76. What is the main purpose of a bite block in airway management?
To prevent patients from biting and obstructing airway devices.

77. What type of airway device can be damaged by patient biting?
Endotracheal tube

78. What patient condition increases the risk of involuntary biting?
Decreased level of consciousness.

79. What is one common complication of airway obstruction from biting?
Hypoxia

80. What type of material ensures a bite block does not collapse under pressure?
Rigid plastic

81. What airway adjunct can function as both an airway and a bite block?
Oropharyngeal airway

82. What should be avoided when using a bite block in a patient with a gag reflex?
Insertion of the device.

83. What is one purpose of a bite block during mechanical ventilation?
To maintain uninterrupted airflow.

84. What can biting an airway device trigger on a ventilator?
High-pressure alarms

85. What is one benefit of using a bite block during procedures?
Protection of equipment and patient safety.

86. What is one sign of airway compromise related to biting?
Decreased delivered tidal volume.

87. What must be monitored when a bite block is in place?
Oral tissues and airway patency.

88. What is one complication of prolonged pressure from a bite block?
Tissue breakdown.

89. What should be done when a patient regains their gag reflex?
Remove the bite block.

90. What is one reason for using a bite block in emergency airway care?
To quickly protect the airway after intubation.

91. What is one risk of not using a bite block in an intubated patient?
Tube occlusion from biting.

92. What type of patient may require a bite block to prevent tongue injury?
Seizure patients

93. What is one indicator that a patient may be biting the tube?
Sudden increase in airway resistance.

94. What is one role of a bite block in airway device protection?
Preventing structural damage.

95. What is one key step after placing a bite block?
Confirm proper positioning.

96. What type of injury can occur if a bite block is too large?
Pharyngeal trauma

97. What is one reason for reassessing the need for a bite block?
Changes in patient consciousness.

98. What is one function of integrated bite blocks in airway devices?
Providing built-in protection against biting.

99. What is one benefit of preventing biting in ventilated patients?
Improved ventilation efficiency.

100. What is one essential aspect of bite block use in clinical care?
Ongoing monitoring and timely removal.

Final Thoughts

A bite block is a small but important component of airway management that plays a key role in protecting both the patient and respiratory equipment. Its primary function is to prevent biting, which can compromise ventilation and damage critical devices such as endotracheal tubes and bronchoscopes.

While often integrated into other airway adjuncts like oropharyngeal airways, its purpose remains consistent across clinical settings.

Proper use requires careful patient selection, correct sizing, and ongoing monitoring. When applied appropriately, a bite block supports safe and effective respiratory care in a wide range of clinical situations.