| Serum ionized Ca measured with new ion-selected electrode and Q-oTc interval in newborn infants. |
|
Beom Joo Kim, Chang Hee Han, Heng Mi Kim, Doo Hong Ahn |
|
Department of Pediatrics, School of Medicine Kyungpook National University, Taegu, Korea |
| 신생아에 있어서 새로운 Ion-Selected Electrode로
측정한 혈청 이온화 Ca++ 과 Q-oTc 간격 |
|
김범주, 한창희, 김행미, 안두홍 |
|
경북대학교 의과대학 소아과학교실 |
|
Received: 28 December 1990 • Accepted: 20 February 1991 |
|
|
| Abstract |
|
The reliability of electrocardiographic detection of serum ionized Ca level was studied in 13
preterm and 32 full term infants.
The concentration of ionized Ca was measured with a new ion-selected electrode, NOVA SP4
(NOVA Biomedical, Waltham, MA USA).
The Q-oTc interval correlated with total Ca (r=o.553, p<0.01) and ionized Ca (r= -0.435, p<
0.01) but the Q-Tc interval did not correlate with total and ionized Ca.
The concentration of ionized Ca correlated with total Ca (r=0.455, p<0.01) but the predictive
values of ionized Ca were poor.
When the hypocalcemia was defined as ionized Ca<3.0 mg/dl, 91% of hypocalcemic infants
revealed prolonged Q-oTc interval. Ionized Ca was low in 42% of cases when the Q-oTc interval was
prolonged and in 2% when the Q-oTc interval was normal.
When the hypocalcemia was defined as ionized Ca<3.5mg/dl, 69% of hypocalcemic infants
revealed prolonged Q-oTc interval. Ionized Ca was low in 46% of cases when the Q-oTc interval was
prolonged and in 10% when the Q-oTc interval was normal.
The Q-oTc interval permits reliable screening test for ionized Ca<3.0 mg/dl but not for ionized
Ca<3.5 mg/dl. |
| Key Words:
Ionized Ca, Q-oTc interval |
|
PDF Links
Download Citation
