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Published on: July 3, 2013
Insights
Children with type 1 renal tubular acidosis (RTA) require significant alkali therapy for sustained acidosis correction. This treatment promotes catch-up growth and normal stature in affected children.
Area of Science:
- Pediatrics
- Nephrology
- Endocrinology
Background:
- Type 1 renal tubular acidosis (RTA) is characterized by impaired renal bicarbonate reabsorption.
- Acidosis in RTA can lead to significant growth impairment in children.
- Optimal alkali dosage for sustained correction remains an area of investigation.
Purpose of the Study:
- To determine the sustained efficacy of alkali therapy in correcting acidosis in children with type 1 RTA.
- To evaluate the impact of sustained acidosis correction on growth and stature in children with type 1 RTA and growth impairment.
Main Methods:
- Retrospective analysis of children diagnosed with type 1 RTA.
- Administration of alkali therapy at doses ranging from 5 to 14 mEq/kg/day.
- Monitoring of acid-base status and growth parameters.
Main Results:
- Sustained correction of acidosis was achieved with alkali therapy doses of 5 to 14 mEq/kg/day.
- Children with type 1 RTA and growth impairment experienced catch-up growth and attained normal stature.
- Large alkali doses were necessary due to significant renal bicarbonate-wasting.
Conclusions:
- Alkali therapy is effective in sustained acidosis correction in pediatric type 1 RTA.
- Sustained acidosis correction promotes catch-up growth and normal stature attainment in affected children.
- Further research is needed to determine the effects of acidosis correction on growth in other renal conditions.
Abstract:
Our data demonstrate that correction of acidosis is sustained in children with type 1 RTA when alkali therapy is given in doses of 5 to 14 mEq/kg/day. The large doses are required as a result of renal bicarbonate-wasting. Children with type 1 RTA and acidosis who have significant growth impairment experience catch-up growth and attain normal stature for their age when correction of acidosis is sustained. Whether chronic acidosis impairs growth in any clinical condition except type 1 RTA is not settled. Whether sustained correction of acidosis with alkali therapy will allow attainment of normal stature in children with nonuremic diffuse renal disease is not yet determined. With the increasing availability of microchemistry and microgasometry and the new standards for growth based on mean-parent height [40], it can be anticipated that answers to these clinically important questions will be forthcoming.
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