PubMed Health⌕ Search
Home/Archive/PubMed

PubMed · 9062826

A partial dialysate collection method.

Y L Cheng·C C Shek·A K Wong·F K Wong·K F Chau·C S Li
View original source ↗Export metadata ↓

Abstract

This study validates Ing's partial dialysate collection method, which employs proportionate collection using a side tube capped with a small-gauge plastic needle. The urea nitrogen and creatinine levels of the small representative fraction of spent dialysate collected in the above fashion are undistinguishable from those obtained from the total spent dialysate. The estimated urea nitrogen removed during hemodialysis using this approach is similar to that using the total dialysate collection method; Ing's method is simple and useful in quantifying the dialysis dosage and in its assessment of the nutritional status of patients on hemodialysis.

Explore related subjects

BicarbonatesCreatinineDialysis SolutionsEquipment ReuseHumansKineticsRenal DialysisReproducibility of ResultsUreaComparative StudyJournal Article

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

Y L Cheng, C C Shek, A K Wong, F K Wong, K F Chau, C S Li. 1997. A partial dialysate collection method.. https://pubmed.ncbi.nlm.nih.gov/9062826/

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed1999

Membrane permeability of formate in human erythrocytes: NMR measurements.

The rate of the rapid exchange of formate mediated by band 3 in human erythrocytes, under equilibrium exchange conditions, was measured by using a T1 relaxation method with 13C-labelled formate and 13C NMR, and a pulsed field-gradient spin-echo (PFGSE) method using 1H NMR. The former analysis was based on large differences in T1 between the inside and the outside of the cells brought about by added Mn2+; the latter was based on large differences in the apparent diffusion coefficient inside and outside the cells. There was close agreement in the estimates of the membrane permeabilities made using both methods, suggesting a lack of interference of the exchange process by Mn2+. Regression analysis yielded estimates (under the specified conditions, including 37 degrees C) of Vmax of 3.5 +/- 0.3 x 10(-9) and 3.8 +/- 0.4 x 10(-9) mol cm-2 s-1, and K(m) of 9.8 +/- 0.2 and 8.1 +/- 0.2 mM, for the T1 and the PFGSE methods, respectively. These are new estimates made using methodology that has not previously been applied to measuring rapid (sub-second time scale) formate exchange in cells.

Bicarbonates↗
PubMed1999

Diagnostic aids in the differentiation of pyloric stenosis from severe gastroesophageal reflux during early infancy: the utility of serum bicarbonate and serum chloride.

This study evaluated whether serum bicarbonate levels, serum chloride levels, and other diagnostic criteria could be used to differentiate pyloric stenosis (PS) from severe gastroesophageal reflux (GER) during early infancy. The investigation was a retrospective, case-control study conducted in the emergency department of a large, academic children's hospital. Cases were 75 consecutive infants with PS confirmed in the operating room. Controls were 75 consecutive infants 12 weeks of age or younger with the diagnosis of GER whose serum electrolytes had been examined. Projectile vomiting was sensitive (0.93) but not specific (0.39) for PS. The mean serum bicarbonate level was 27.2 mmol/L for PS patients and 22.3 mmol/L for GER patients (P < .00001), and the mean serum chloride level was 95.7 mmol/L and 103.6 mmol/L for PS patients and GER patients, respectively (P < .00001). Serum bicarbonate levels of > or =29 mmol/L and serum chloride levels of < or =98 mmol/L had high positive predictive values (0.96 and 0.97, respectively) and were specific (0.99 for both) but not very sensitive (0.36 and 0.50, respectively) in identifying patients with PS. Only one patient would have been misclassified (false positive) as having PS using either of these cutoff values. These laboratory tests can also help discriminate between PS and GER when the history and physical examination fail to do so. For example, of the 20 patients with PS who did not have a pyloric mass palpated, 3 (15%) had serum bicarbonate levels of > or =29 mmol/L, and 6 (30%) had serum chloride levels of < or =98 mmol/L. In conclusion, the serum bicarbonate or serum chloride level offers a useful additional diagnostic tool in the evaluation of children presenting during early infancy with vomiting of uncertain etiology.

Bicarbonates↗