Nelson et al. (1414. Nelson WK, Houghton SG, Milliner DS, Lieske JC, Sarr MG. Enteric hyperoxaluria, nephrolithiasis, and oxalate nephropathy: potentially serious and unappreciated complications of Roux-en-Y gastric bypass. Surg Obes Relat Dis. 2005;1:481-5.) |
2005 |
Retrospective study |
RYGB |
23 patients |
Calcium oxalate nephrolithiasis in 21 patients. Enteric hyperoxaluria with oxalate nephropathy in 2 patients. Increased 24-hour excretion of urinary oxalate and calcium oxalate supersaturation. |
Matlaga et al. (1313. Matlaga BR, Shore AD, Magnuson T, Clark JM, Johns R, Makary MA. Effect of gastric bypass surgery on kidney stone disease. J Urol. 2009;181:2573-7.) |
2009 |
Prospective study |
RYGB |
4693 patients vs. 4693 controls |
In operated group: Increased risk of kidney stone. |
Park et al. (1515. Park AM, Storm DW, Fulmer BR, Still CD, Wood GC, Hartle JE 2nd. A prospective study of risk factors for nephrolithiasis after Roux-en-Y gastric bypass surgery. J Urol. 2009;182:2334-9.) |
2009 |
Prospective study |
RYGB |
45 patients |
Increased urinary oxalate and calcium oxalate supersaturation. Decreased urinary citrate and total urinary volume. |
Penniston et al. (2020. Penniston KL, Kaplon DM, Gould JC, Nakada SY. Gastric band placement for obesity is not associated with increased urinary risk of urolithiasis compared to bypass. J Urol. 2009;182:2340-6.) |
2009 |
Prospective study |
27 RYGB 12 gastric binding |
39 patients |
Decreased urinary volume in RYGB and gastric banding. Decreased urinary calcium in RYGB. Decreased urinary citrate in 14 RYGB patients and 1 gastric binding patient. Increased urinary oxalate in RYGB. |
Dufey et al. (1616. Duffey BG, Alanee S, Pedro RN, Hinck B, Kriedberg C, Ikramuddin S, et al. Hyperoxaluria is a long-term consequence of Roux-en-Y Gastric bypass: a 2-year prospective longitudinal study. J Am Coll Surg. 2010;211:8-15.) |
2010 |
Prospective study |
RYGB |
21 patients |
Increased urinary oxalate excretion. De novo hyperoxaluria. Increased hypocitraturia. |
Reis et al. (2424. Reis LO, Favaro WJ, Barreiro GC, de Oliveira LC, Chaim EA, Fregonesi A, et al. Erectile dysfunction and hormonal imbalance in morbidly obese male is reversed after gastric bypass surgery: a prospective randomized controlled trial. Int J Androl. 2010;33:736-44.) |
2010 |
Prospective study |
Gastric bypass |
20 patients 20 cohorts |
In operated group: Increased International Index of Erectile Function score, total testosterone, and follicle - stimulating hormones. Decreased prolactin level. |
Kumar et al. (1717. Kumar R, Lieske JC, Collazo-Clavell ML, Sarr MG, Olson ER, Vrtiska TJ, et al. Fat malabsorption and increased intestinal oxalate absorption are common after Roux-en-Y gastric bypass surgery. Surgery. 2011;149:654-61.) |
2011 |
Prospective study |
9 RYGB 2 biliopancreatic diversion-duodenal switch |
11 patients |
Increased urine oxalate excretion. Increased plasma oxalate and urine calcium oxalate supersaturation. Increased fecal fat excretion. Decreased total urine volume. |
Valezi et al. (1919. Valezi AC, Fuganti PE, Junior JM, Delfino VD. Urinary evaluation after RYGBP: a lithogenic profile with early postoperative increase in the incidence of urolithiasis. Obes Surg. 2013;23:1575-80.) |
2013 |
Prospective study |
RYGB |
151 patients |
Increased urinary oxalate. Increased urinary uric acid. Decreased urinary volume. |
Rosenblatt et al. (2828. Rosenblatt A, Faintuch J, Cecconello I. Sexual hormones and erectile function more than 6 years after bariatric surgery. Surg Obes Relat Dis. 2013;9:636-40.) |
2013 |
Prospective study |
RYGB |
23 patients 14 obese controls 14 lean controls |
In operated group: Improved erectile dysfunction and overall satisfaction. |
Agrawal et al. (1818. Agrawal V, Liu XJ, Campfield T, Romanelli J, Enrique Silva J, Braden GL. Calcium oxalate supersaturation increases early after Roux-en-Y gastric bypass. Surg Obes Relat Dis. 2014;10:88-94.) |
2014 |
Prospective study |
RYGB |
11 patients |
Increased urinary oxalate. Decreased citrate. Decreased urine volume. |
Lieske et al. (1212. Lieske JC, Mehta RA, Milliner DS, Rule AD, Bergstralh EJ, Sarr MG. Kidney stones are common after bariatric surgery. Kidney Int. 2015;87:839-45.) |
2015 |
Prospective study |
591 RYGB 105 mal-absorptive procedure 56 restrictive 7 other |
762 patients vs. 759 controls |
In operated group: Risk of stones. |
Sarwer et al. (2525. Sarwer DB, Spitzer JC, Wadden TA, Rosen RC, Mitchell JE, Lancaster K, et al. Sexual functioning and sex hormones in men who underwent bariatric surgery. Surg Obes Relat Dis. 2015;11:643-51.) |
2015 |
Prospective study |
RYGB |
32 patients |
Increased total testosterone and sex hormone binding globulin. |
Goiten et al. (2626. Goitein D, Zendel A, Segev L, Feigin A, Zippel D. Bariatric Surgery Improves Sexual Function in Obese Patients. Isr Med Assoc J. 2015;17:616-9.) |
2015 |
Prospective study |
36 laparoscopic sleeve gastrectomy 12 RYGB |
48 patients |
Improved general satisfaction, desire and erection. |
El Bardisi et al. (2727. El Bardisi H, Majzoub A, Arafa M, AlMalki A, Al Said S, Khalafalla K, et al. Effect of bariatric surgery on sêmen parameters and sex hormone concentrations: a prospective study. Reprod Biomed Online. 2016;33:606-611.) |
2016 |
Prospective study |
SG |
46 patients |
Increased serum testosterone. |
Samavat et al. (2323. Samavat J, Cantini G, Lotti F, Di Franco A, Tamburrino L, Degl'Innocenti S, et al. Massive Weight Loss Obtained by Bariatric Surgery Affects Semen Quality in Morbid Male Obesity: a Preliminary Prospective Double-Armed Study. Obes Surg. 2018;28:69-76.) |
2017 |
Prospective study |
23 RYGB |
23 patients 8 controls |
In operated group: Increased gonadotropins, total testosterone, sex-hormonebinding-globulin and calculated free testosterone. Decreased estradiol. Increased semen volume and viability. Improved progression and total motility and total sperm number. In both groups: Worsened sperm morphology. |
Maalouf et al. (2222. Maalouf NM, Tondapu P, Guth ES, Livingston EH, Sakhaee K. Hypocitraturia and hyperoxaluria after Roux-en-Y gastric bypass surgery. J Urol. 2010;183:1026-30.) |
2010 |
Cross-sectional study |
RYGB |
19 patients 19 controls |
In operated group: Increased urine oxalate. Decreased urine citrate. Decreased urine calcium. |
di Frega et al. (1111. di Frega AS, Dale B, Di Matteo L, Wilding M. Secondary male factor infertility after Roux-en-Y gastric bypass for morbid obesity: case report. Hum Reprod. 2005;20:997-8.) |
2005 |
Case reports |
RYGB |
6 patients |
Non-obstructive azoospermia. Spermatogenesis arrest. |
Sermondade et al. (1010. Sermondade N, Massin N, Boitrelle F, Pfeffer J, Eustache F, Sifer C, et al. Sperm parameters and male fertility after bariatric surgery: three case series. Reprod Biomed Online. 2012;24:206-10.) |
2012 |
Case reports |
1 SG 2 RYGB |
3 patients |
Extreme oligoasthenoteratozoospermia. No azoospermia. |