Variation of pH and Electrolyte in Nasal Secretum / 대한이비인후과학회지

BACKGROUND: Airway secretions partly arise from the interstitial fluid and partly from the secretory activities of respiratory epithelium and submucosal gland. The flow of water across the tracheobronchial epithelium is likely to be an important determinant of the efficiency of mucociliary clearance. Water movement across the epithelium is thought to follow active ion transport passively by means of the osmotic gradients created. OBJECTIVES: The aim of this study was to determine whether Na, K, and Cl are transported actively by the epithelium of nasal mucosa and to evaluate an effect of the tracheostomy on changes of pH and electrolytes in nasal secretum. MATERIALS AND METHODS: pH and Na, K, and Cl values were estimated in 35 samples (20 tracheostomized patients and 15 normal persons) of nasal secretum and plasma. RESULTS: On 15 normal persons, Mean pH value was 7.43, Na 143.2, K 4.2 and Cl 109.1(mEq/L) in plasma and Mean pH value was 7.81, Na 139.7, K 11.5 and Cl 127.5(mEq/L) in nasal secretion. On 20 tracheostomized patients, pH 7.49, Na 140.2, K 3.8, and Cl 108.7(mEq/L) in plasma were estimated, and pH 7.88, Na 128.5, K 12.0, and Cl 121.5(mEq/L) were estimated in nasal secretum. In nasal secretum pH, K, and Cl were higher than in plasma by +0.39, +8.2 and +12.8(mEq/L) respectively, while Na was lower -11.6(mEq/L). We had the same result on normal persons as on tracheostomized patients. The results show that pH, K and Cl were higher in nasal secretion and Na was lower than in plasma. CONCLUSION: Significant difference of pH and electrolyte values in nasal secretion was not observed between normal person and tracheostomized patient.

The Effect of Audiant Bone Conductor Implantation / 대한이비인후과학회지

Audiant bone conductor(ABC) can be beneficial to patients with conductive hearing loss and sensorineural hearing loss. We have implanted ABC for 3 patients with bilateral conductive hearing loss and 2 patients with unilateral profound sensorineural hearing loss. And we evaluated the hearing gain in these patients except 1 case who did not return for follow up. The preoperative average air conduction threshoulds at the three speech frequencies 500, 1000 and 2000Hz, SRT, SD scores were 48.3dB HL, 47.5dB HL, 95% respectively and 19.1dB HL, 20dB HL, 95% postoperatively in 2 patients with bilateral conductive hearing loss. The preoperative average air conduction threshoulds at the three speech frequencies 500, 1000 and 2000Hz, SRT, SD scores were no response, no response, 0% respectively and 42.5dB HL, 51.3dB HL, 60% postoperatively in 2 patients with sensorineural hearing loss.