Korean J Otolaryngol-Head Neck Surg.  1997 Dec;40(12):1808-1813.

The Change in Arterial Blood Gases during High Frequency Jet Ventilation via Weerda Distending Operating Laryngoscope

• Kim HJ
• Lee KH
• Kim KH

Abstract

BACKGROUND: High Frequency Jet Ventilation(HFJV) has been applied safely to microlaryngeal endoscopic surgery(MES) via 14-16 gauge angiocath which is located around the carina. If HFJV is applied via the injection cannula of the Weerda distending operating laryngoscope(Weerda laryngoscope) which is located in 10cm above the vocal cord, complications associated with intubation and airway firing during laser surgery can be minimized. But increased dead space is expected.
OBJECTIVES
We observed arterial blood gas changes after HFJV to determine how increased dead space influence arterial blood gases.
MATERIALS AND METHODS
Eighteen patients scheduled for MES were studied. We analyzed arterial blood gases at just before HFJV, 5, 10, 15 and 20 minutes after HFJV and 15 minutes after postanesthetic recovery room(PAR) arrival. Complications were also evaluated via physical examination and chest X-ray films.
RESULTS
1) All arterial oxygen tensions during HFJV with 100% oxygen(we do not have exact inspired oxygen fraction because of Venturi effect.) were above 200 mmHg. 2) Arterial carbon dioxide tension at 5 and 10 minutes after HFJV were significantly(p<0.05) greater than arterial carbon dioxide tension before HFJV. Statistical analysis was not performed due to small number of case(N=4, 3) at 15 and 20 minutes after HFJV, but progressive increasing tendency of arterial carbon dioxide tension was observed. 3) Complications such as mild abdominal distension, hypercarbia and moderate mucosal dryness were observed.
CONCLUSION
HFJV via the injection cannula of Weerda laryngoscope can be used with caution such as prevention of hypercarbia.

Keyword

Arterial blood gas analysis; Complication; High frequency jet ventilation; Weerda distending operating laryngoscope

MeSH Terms

Carbon Dioxide
Catheters
Fires
Gases*
High-Frequency Jet Ventilation*
Humans
Intubation
Laryngoscopes*
Laser Therapy
Oxygen
Physical Examination
Thorax
Vocal Cords
X-Ray Film
Carbon Dioxide
Gases
Oxygen