magnesium ammonium phosphate stone

(redirected from Struvite stone)

magnesium ammonium phosphate stone

A type of kidney stone, which is more common in women, linked to urinary tract infections (e.g., by Proteus spp) that produce specific enzymes. MAPSs can become very large, fill the renal pelvis, develop a staghorn appearance, obstruct the urinary tract and cause kidney damage.
 
Specimen
Stones obtained surgically or after being “passed” in the urine.

Method
Light microscopy, optical crystallography, IR spectroscopy, X-ray diffraction.

magnesium ammonium phosphate stone

Struvite stone A type of stone more common in ♀, linked to UTIs–eg, by Proteus spp, which produce specific enzymes; MAPSs can become very large, fill the renal pelvis, develop a staghorn appearance, obstruct the urinary tract and cause kidney damage
Mentioned in ?
References in periodicals archive ?
Diet has not been shown to affect struvite stone formation.
Another 15% are the struvite stone that form only in the presence of the urease-producing bacteria such as Proteus mirabilis, Klebsiella, Serratia and Mycoplasma in the upper urinary tract like the calyces or proximal ureter.
From the original numbers on initial sampling, 7 patients of the 43 CaOx, 5 of the 38 CaP, 3 of the 21 UA, none of the 6 cystine, all of the 4 mixed CaOx-CaP, all of the 2 mixed CaOx-UA and all of the 4 struvite stone types were different.
Struvite stone formation by Corynebacterium group F1: a case report.
Compound uroliths develop when a stone's environment changes, such as when a struvite stone is treated by reducing urinary pH, magnesium, and phosphorus, resulting in a calcium oxalate shell around the struvite core.
1,2] Self IC is the preferred method of bladder emptying because it minimizes the risk of infection and decreases the risk of calcium phosphate and struvite stone formation.
Bartges: "A struvite stone will be about the size of an almond, or maybe a walnut.
Urosepsis was more in supra costal group because it is indicated in large number of staghorn calculi and large renal pelvic calculi which is struvite stone harbouring more bacterial load, this can be minimized by using preoperative culture sensitivity based antibiotics.
It contributes to struvite stone formation as well as alkaline (high-pH) urine.
Several groups have documented the decreasing frequency of struvite stones in the adult and paediatric/ neurogenic patient population.
These consisted of calcium oxalate monohydrate and dihydrate, hypoxantine, uric acid, and struvite stones.