Evidence map›Paper›PMID 19013593›Full record

ArticleThe Journal of urology2009

Prevalence of hyperoxaluria after bariatric surgery.

Bhavin N Patel, Corey M Passman, Adolfo Fernandez, John R Asplin, Fredric L Coe, Sam C Kim, James E Lingeman, Dean G Assimos

Abstract read
In one paragraph

Article in The Journal of urology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed
6.3field-weighted citation impact, top 4% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

34 citing papers in PubMed, 97 citations in OpenAlex.

  1. Hyperoxaluria: Diagnosis and Treatment.The Urologic clinics of North America · 2025
    Review
  2. Living Kidney Donation Practices in Europe: A Survey of DESCaRTES and EKITA Transplantation Working Groups.Transplant international : official journal of the European Society for Organ Transplantation · 2025
    Article
  3. Article
  4. High Plasma Oxalate Levels Early After Kidney Transplantation Are Associated With Impaired Long-Term Outcomes.Transplant international : official journal of the European Society for Organ Transplantation · 2022
    Article
  5. Article
  6. Review
  7. Article
  8. Observational
  9. Kidney Stones After Bariatric Surgery: Risk Assessment and Mitigation.Bariatric surgical practice and patient care · 2017
    Review
  10. Article
  11. Review
  12. Review
  13. Kidney stone risk following Roux-en-Y gastric bypass surgery.Translational andrology and urology · 2014
    Article
  14. Review
  15. Review
  16. Metabolic and endocrinological factors related to nephrolithiasis pre and post multiple techniques of bariatric surgery: a sistematic review.Arquivos brasileiros de cirurgia digestiva : ABCD = Brazilian archives of digestive surgery · 2014
    Review
  17. Article
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 4 institutions in 1 country.

Bhavin N PatelWake Forest University Medical Center, Winston-Salem, North Carolina, USA.
Corey M Passman
Adolfo Fernandez
John R Asplin
Fredric L Coe
Sam C Kim
James E Lingeman
Dean G Assimos
University Medical Center · USLink Foundation · USMethodist Hospital · USWake Forest University · US

Funding

Dietary Oxalate and Kidney Stone FormationR01DK062284 · NIDDK · WAKE FOREST UNIVERSITY HEALTH SCIENCES · PI ASSIMOS, DEAN GEORGE · 2002 to 2010
$2.4M
NIDDK NIH HHS R01 DK062284
6 · The paper itself

Abstract

purposeRecent investigations have shown increased oxalate excretion in patients in whom kidney stones formed after contemporary bariatric surgery. We determined whether there is an increased prevalence of hyperoxaluria after such procedures performed in nonstone formers. MATERIALS AND

methodsA total of 58 nonstone forming adults who underwent laparoscopic Roux-en-Y (52) or a biliopancreatic diversion-duodenal switch procedure (6) collected 24-hour urine specimens 6 months or greater after bariatric surgery. Standard stone risk parameters were assessed. Comparisons were made with a group of healthy nonstone forming adults and stone formers in a commercial database.

resultsThe bariatric group had a significantly higher mean urinary oxalate excretion compared to that in controls and stone formers (67.2 vs 34.1 and 37.0 mg per day, respectively, p <0.001). Mean oxalate excretion of patients who underwent a biliopancreatic diversion-duodenal switch procedure was higher than in the Roux-en-Y group (90 vs 62 mg per day, p <0.05). There was a significant correlation between urine oxalate excretion on the 2 collection days but some patients showed significant variability. Of the patients 74% showed hyperoxaluria in at least 1, 24-hour urine collection and 26% demonstrated profound hyperoxaluria, defined as oxalate excretion more than 100 mg per day, in at least 1 collection. This occurred in 3 of the 6 patients in the biliopancreatic diversion-duodenal switch group and in 12 of the 52 in the Roux-en-Y cohort. Hyperoxaluria was not uniformly expressed.

conclusionsThere is a high prevalence of hyperoxaluria in patients without a history of kidney stones who undergo bariatric surgery. A significant proportion of these patients have profound hyperoxaluria, which is not uniformly expressed.

Indexed as

AdultBariatric SurgeryFemaleHumansHyperoxaluriaMaleMiddle AgedPrevalenceYoung Adult

Identifiers

PMID19013593
PMCPMC2637794
OpenAlexW1998718714

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.