The Influence of Degree of Head Elevation on Insertion Success for ProSeal Laryngeal Mask Airway Insertion
Study Details
Study Description
Brief Summary
Background - The purpose of the present study is to evaluate the success and pharyngeal trauma when 3 or 6 cm height of pillow is used for the ProSealTM laryngeal mask airway insertion
Methods
- This prospective randomized, controlled study included 80 adult patients . In the 3 cm (n=40) or 6 cm group (n=40), the PLMA was inserted while the head is placed on the 3 cm or 6 cm height of pillow. The success rate at first and second attempt, insertion time, blood staining on cuff, sore throat and hoarseness were assessed.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
|
N/A |
Detailed Description
Background: The "sniffing position" (i.e., the neck flexed and head extended by means of a pillow) eases tracheal intubation because the three axes, namely, the axis of the mouth, the pharyngeal axis and the laryngeal axis, are put in almost a straight line. The benefit of the sniffing position that align three axis could possibly be applicable when the ProSeal LMA is inserted. For the endotracheal intubation, it has been recommended to elevate the patient's head 8 to 10 cm with pads under the occiput (shoulder remaining on the table) and extend the head at the atlanto-occipital joint to align the oral, pharyngeal, and laryngeal axes such that the passage and line of vision from the lips to the glottic opening are most nearly a straight line.
There have been several clinical studies about the effect of head and neck position including neutral, flexion or extension on the ease of LMA insertion.
However, it has not been much recommended or investigated about the influence of head elevation on the insertion success of PLMA until now. The purpose of the present study is to evaluate the success and pharyngeal trauma when 3 or 6 cm height of pillow is used for the ProSeal laryngeal mask airway insertion in adult patients.
Study Design
Arms and Interventions
| Arm | Intervention/Treatment |
|---|---|
| Other: 3cm head elevation Insertion of ProSeal laryngeal mask airway |
Device: Insertion of ProSeal laryngeal mask airway
The patient's head was placed on the 3 cm or 6 cm height of a pillow in supine and PLMA was inserted using a standard method in the sniffing position.
The success rate at first and second attempt, insertion time, Seal pressure, hemodynamic variables, complications(blood staining on cuff, sore throat and hoarseness) were assessed
|
| Active Comparator: 6cm head elevation Insertion of ProSeal laryngeal mask airway |
Device: Insertion of ProSeal laryngeal mask airway
The patient's head was placed on the 3 cm or 6 cm height of a pillow in supine and PLMA was inserted using a standard method in the sniffing position.
The success rate at first and second attempt, insertion time, Seal pressure, hemodynamic variables, complications(blood staining on cuff, sore throat and hoarseness) were assessed
|
Outcome Measures
Primary Outcome Measures
- insertion success rate [2013.11 - 2014.12]
Secondary Outcome Measures
- complication [2013.11- 2014.12]
Number of participants with blood on the surface of the cuff, postoperative sore throat and hoarseness as indices of complications.
Eligibility Criteria
Criteria
Inclusion Criteria:
-
American Society of Anesthesiologists physical status 1-2
-
scheduled for minor surgery in the supine position were enrolled
Exclusion Criteria:
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cardiorespiratory disease patients
-
patients were at risk of aspiration
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | National Medical Center | Seoul | Korea, Republic of | 100-799 |
Sponsors and Collaborators
- National Medical Center, Seoul
Investigators
- Study Chair: Mija Yun, MD, PhD, National Medical Center
Study Documents (Full-Text)
None provided.More Information
Publications
None provided.- phdkim1