ANALISIS KADAR ELEKTROLIT YANG DIPERIKSA MENGGUNAKAN BLOOD GAS ANALYZER DAN NOVA ELEKTROLIT ANALYZER PADA PASIEN ICU DI RSUP Dr. MOHAMMAD HOESIN PALEMBANG

Latar Belakang: Natrium dan kalium merupakan elektrolit penting yang digunakan dalam pemantauan pasien kritis di Intensive Care Unit (ICU). Pemeriksaan elektrolit menggunakan Blood Gas Analyzer (BGA) dan Nova 5 Elektrolit Analyzer (NEA) sama-sama menerapkan metode Ion Selective Electrode (ISE), namun perbedaan jenis spesimen berpotensi menimbulkan variasi hasil pemeriksaan.Tujuan: Menganalisis perbedaan hasil pemeriksaan kadar natrium dan kalium menggunakan BGA dan NEA pada pasien ICU di RSUP Dr. Mohammad Hoesin Palembang. Metode: Penelitian observasional analitik dengan desain cross-sectional menggunakan 156 sampel pasien ICU. Analisis data meliputi statistik deskriptif, uji normalitas, uji Mann–Whitney, dan uji korelasi Spearman. Hasil: Rerata kadar natrium dan kalium menggunakan BGA masing-masing sebesar 132,085 mmol/L dan 3,762 mmol/L, sedangkan menggunakan NEA sebesar 138,123 mmol/L dan 4,128 mmol/L. Kedua alat memenuhi persyaratan mutu laboratorium. Uji Mann–Whitney menunjukkan terdapat perbedaan bermakna pada kadar natrium dan kalium (p<0,001). Uji korelasi Spearman menunjukkan hubungan positif yang bermakna dengan kekuatan hubungan sedang pada natrium (r=0,553) dan kuat pada kalium (r=0,754). Kesimpulan: Terdapat perbedaan yang bermakna secara statistik pada hasil pemeriksaan kadar natrium dan kalium menggunakan Blood Gas Analyzer dan Nova 5 Elektrolit Analyzer. Meskipun demikian, kedua alat memenuhi persyaratan mutu laboratorium dan menunjukkan hubungan positif yang bermakna.

Background: Sodium and potassium are important electrolytes used in monitoring critically ill patients in the Intensive Care Unit (ICU). Although both the Blood Gas Analyzer (BGA) and Nova 5 Electrolyte Analyzer (NEA) employ the Ion Selective Electrode (ISE) method, differences in specimen types may lead to variations in measurement results. Objective: To analyze the differences in sodium and potassium measurement results obtained using the BGA and NEA in ICU patients at Dr. Mohammad Hoesin General Hospital, Palembang. Methods: This analytical observational study employed a cross-sectional design involving 156 ICU patient samples. Data were analyzed using descriptive statistics, normality testing, the Mann–Whitney test, and Spearman correlation analysis. Results: The mean sodium and potassium levels measured using the BGA were 132.085 mmol/L and 3.762 mmol/L, respectively, while those measured using the NEA were 138.123 mmol/L and 4.128 mmol/L. Both instruments met laboratory quality requirements. The Mann–Whitney test showed significant differences in sodium and potassium levels between the two instruments (p < 0.001). Spearman correlation analysis demonstrated significant positive correlations, with a moderate correlation for sodium (r = 0.553) and a strong correlation for potassium (r = 0.754). Conclusion: Statistically significant differences were observed in sodium and potassium measurement results between the Blood Gas Analyzer and the Nova 5 Electrolyte Analyzer. Nevertheless, both instruments met laboratory quality standards and demonstrated significant positive correlations.