Calculi (Total 55772 Papers Found)

Aus Stallmist verschiedener Herkunft und Zusammensetzung wurden 11 verschiedene thermophile Strahlenpilzarten isoliert und ihre morphologischen und physiologischen Eigenschaften untersucht. Alle gehören zur Familie der Streptomycetaceen. Sie werden ausführlich beschrieben. Auf Grund der Beobachtungen an diesen Arten werden die Actinomyceten systematisch neu eingeteilt, 3 neue Gattungen (Thermomonospora, Thermopolyspora und Pseudonocardia) werden aufgestellt. Ein Bestimmungsschlüssel für die ...
The authors describe the technical results in 127 patients who underwent diagnostic gallbladder puncture and percutaneous cholecystostomy. The procedures were performed for a variety of indications including treatment of acute calculous or acalculous cholecystitis, drainage of obstructive jaundice or gallbladder perforation, percutaneous removal or dissolution of gallstones, diagnostic cholecystocholangiography, and gallbladder biopsy. Successful completion of the intended procedure was achieved ...
In the setting of difficult dissection of Calot’s triangle during laparoscopic cholecystectomy, conversion is commonly advocated. An alternative approach aimed at preventing bile duct injury is laparoscopic partial cholecystectomy (LPC). The safety and efficacy of this procedure are unclear. A systematic review of the literature was performed independently by three researchers. The outcomes were conversion rate, hospital length of stay (LOS), bile duct injury, bile leak, symptomatic gallstones ...
In this retrospective study, 31 Kuwaiti children with renal stones were reviewed between January 1996 and September 2000. Male to Female ratio was 2.1:1 with a mean age at presentation of 38 months. Family history of renal stones was reported in 58%. Stones were localized to the kidneys in 74.1%,to ureters in 6% and to the bladder in 9.6%.Bilateral stones were found in 64.5%. Clinical manifestations included: hematuria in 70.9%, passage of stones in 64.5%, abdominal pain in 41.9%, urinary tract ...
Over the past 20 years obesity has become a worldwide concern of frightening proportion. The World Health Organization estimates that there are over 400 million obese and over 1.6 billion overweight adults, a figure which is projected to almost double by 2015. This is not a disease restricted to adults - at least 20 million children under the age of 5 years were overweight in 2005 (WHO 2006). Overweight and obesity lead to serious health consequences including coronary artery disease, stroke, ty ...
The management of symptomatic or incidentally discovered common bile duct (CBD) stones is still controversial. Of patients undergoing elective cholecystectomy for symptomatic cholelithiasis, 5–15% will also harbor CBD stones, and those with symptoms suggestive of choledocholithiasis will have an even higher incidence. Options for treatment include preoperative endoscopic retrograde cholangiopancreatography (ERCP) with sphincterotomy (ERCP/ES) followed by laparoscopic cholecystectomy, laparosco ...
Nigeria has a population of 112 million with an annual growth rate of 3.2%. About 25% of adults throughout the country have the sickle cell trait, AS, while the Hb C trait is largely confined to the Yoruba people of southwestern Nigeria in whom it occurs in about 6%. Other variant hemoglobins including beta thalassemia are rare, but alpha thalassemia occurs in 39% (32% with 3 alpha-globin genes; 7% with 2 alpha-globin genes). Of a total of 5.4 million expected live births in 1988, about 90,000 w ...
The question was addressed whether dietary phosphorus-induced nephrocalcinosis in rats is associated with impaired kidney function. Weanling female rats were fed purified diets containing either 0.4 or 0.6% (wt/wt) phosphorus for 28 d. The diet containing 0.6% phosphorus produced marked kidney calcification, as determined both by chemical analysis of kidney calcium and histological examination in kidney sections. Histological examination did not show calcification in stomach, lung, heart or thor ...
A new endoscopic method for treatment of choledocholithiasis in patients with choledochoduodenal fistula is described. In 2 patients with common bile duct stones a choledochoduodenostomy was performed by means of a diathermy snare. In both patients the calculi passed into the duodenum within some days. No complications occurred. It is concluded that the described technique may be helpful when surgery is contraindicated and when endoscopic papillotomy is difficult to perform. ...
The exact cause of salivary calculus formation is unknown and the aim of this study was to ascertain whether bacteria play a role. Sialoliths from nine patients with chronic obstructive sialadenitis of the submandibular gland were analysed. Bacterial gene fragments were amplified from DNA extracted from salivary calculi by means of polymerase chain reaction using a universal bacterial primer pair. Comparative 16S ribosomal RNA sequence analysis was used for identification. We detected and identi ...
PURPOSE Hypercalciuria is the most common cause of kidney stone disease and genetic factors have an important role in nearly half of these cases. Recently loss-of-function mutations of CYP24A1, the gene encoding vitamin D 24-hydroxylase, were identified in idiopathic infantile hypercalcemia. We describe the clinical and molecular basis of severe long-standing kidney stone disease in adults caused by CYP24A1 mutations. MATERIALS AND METHODS Three subjects from 2 Israeli families with nephrolith ...
OBJECTIVE To review the treatment and outcome of patients with common bile duct (CBD) stones who underwent cholecystectomy. DESIGN Prospective series of 700 consecutive laparoscopic cholecystectomies, with a mean follow-up of 22 months. SETTING University-affiliated community hospital. PATIENTS Eighty patients with documented CBD stones during a 42-month period (July 1990 to January 1994). INTERVENTIONS Laparoscopic CBD exploration (LCBDE) was performed with either choledochotomy and T t ...
Brain tissue specimens from 15 patients dying with neuropathologically confirmed clinical diagnoses of senile dementia, Alzheimer type, and 10 approximately age and sex matched elderly patients without signs of senile change, were compared using a group of neurohistological techniques including scanning electron microscopy. In addition to previously described changes in structure of neurons and neuropil, dramatic changes were noted in the capillary bed. Normal cerebral vessels are characterized ...
Percutaneous cholecystolithotomy should be added to the list of alternatives to elective open cholecystectomy for the management of patients with gallstones. Our initial experience with percutaneous cholecystolithotomy in 13 patients (7 men and 6 women who ranged in age from 47 to 83 years) demonstrated that the procedure could be accomplished successfully with acceptable morbidity and no mortality. After a mean duration of follow-up of 10.7 months, only one patient had recurrent cholelithiasis. ...
The objective of the study was to investigate the safety and efficacy of flexible ureteroscopy and holmium laser lithotripsy for the management of patients with autosomal dominant polycystic kidney disease (ADPKD) and associated nephrolithiasis. Between 2005 and 2010, flexible ureteroscopic stone treatment was attempted in 13 patients with ADPKD. Two patients had bilateral renal stones. Most of the stones were located in the renal pelvis and/or calices with a stone size 1.7 cm in the largest di ...
We propose a hybrid model of simplicial quantum gravity by performing at once dynamical triangulations and Regge calculus. A motive for the hybridization is to give a dynamical description of topology-changing processes of Euclidean spacetime. In addition, lattice diffeomorphisms as invariance of the simplicial geometry are generated by certain elementary moves in the model. We attempt also a lattice-theoretic derivation of the black hole entropy using the symmetry. Furthermore, numerical simula ...
  • Romain Potier, Olivier Reineau,
  • Journal of zoo and wildlife medicine : official publication of the American Association of Zoo Veterinarians
  • 2015
A 14.5-yr-old female kinkajou (Potos flavus) was diagnosed with cholelithiasis after an episode of vomiting; diagnostics included biochemical analysis and abdominal ultrasound exam. Despite antimicrobial treatment, cholelithiasis led to cholecystitis. A cholecystotomy was performed to remove choleliths and inspissated bile. Morphological and spectroscopic properties of the choleliths were similar to those of gallstones from the brown pigment family and Streptococcus sp. and Escherichia coli were ...
Two integrated anaerobic/aerobic fixed-bed sequencing batch biofilm reactor (FB-SBBR) were operated to evaluate decolorization and biodegradation of azo dye Acid Red 18 (AR18). Volcanic pumice stones and a type of plastic media made of polyethylene were used as packing media in FB-SBBR1 and FB-SBBR2, respectively. Decolorization of AR18 in both reactors followed first-order kinetic with respect to dye concentration. More than 63.7% and 71.3% of anaerobically formed 1-naphthylamine-4-sulfonate (1 ...
Filter-grown Madin-Darby canine kidney (MDCK) cells labelled for 24 h with [35S]sulphate were found to secrete macromolecules [35S]sulphated on their carbohydrate moieties predominantly into the basolateral medium, whereas the tyrosine-[35S]sulphated proteins synthesized were predominantly secreted into the apical medium. In contrast with the predominant apical secretin of tyrosine-[35S]sulphated proteins, the free tyrosine O-[35S]sulphate (Tyr[35S]) was released mostly into the basolateral medi ...
Semantic Scholar extracted view of "Alimentary production of gallstones in hamsters. 27. Influence of supplementation of the gallstone producing diet with squalene, cholesterol, certain other sterols, fish oil fatty acid ethyl esters, and modification of the basal diet on gallstone production and levels of cholesterol in serum and liver." by H. Strieker J. van Dam et al. ...
Despite revolutionary developments in minimally invasive methods for the removal of stones in the last 15 years, the medical prevention of urinary stones remains very rewarding, due to the continual increase in the prevalence of nephrolithiasis in western countries, the high recurrence rate of the disease, its complications, discomfort and the costs of lithotripsy. Medical prevention is highly effective (50-95% efficacy in different series) and cost-convenient; its basic elements are appropriate ...
Do-calculus is concerned with estimating the interventional distribution of an action from the observed joint probability distribution of the variables in a given causal structure. All identifiable causal effects can be derived using the rules of do-calculus, but the rules themselves do not give any direct indication whether the effect in question is identifiable or not. Shpitser and Pearl (2006b) constructed an algorithm for identifying joint interventional distributions in causal models, which ...
BACKGROUND Percutaneous nephrolithotomy (PCNL) is performed to treat relatively large renal stones. Recent publications indicate that tubeless and total tubeless (stentless) PCNL is safe in selected patients. We performed a systematic review and network meta-analysis to evaluate the feasibility and safety of different PCNL procedures, including total tubeless, tubeless with stent, small-bore tube, and large-bore tube PCNLs. METHODS PubMed, Cochrane Central Register of Controlled Trials, and EM ...
Renal tubular acidosis (RTA) is a well-known metabolic disturbance that may promote recurrent renal stone formation. However, its incidence, screening criteria and association with other lithogenic metabolic abnormalities are not established in recurrent nephrolithiasis. 10 of 50 consecutive recurrent renal stone formers had a persistent fasting morning urinary pH above 6.0 and/or a basal plasma bicarbonate concentration below 20.0 mM. Acid and alkaline loads disclosed RTA in 3 patients: 1 patie ...
PURPOSE A retrospective study was done to determine whether voided urinary cytology was necessary in women with irritative voiding symptoms without hematuria. MATERIALS AND METHODS A total of 202 cytology studies was obtained from 128 women presenting with urge incontinence and/or irritative voiding symptoms between 1990 and 1995. RESULTS Five patients with irritative symptoms and hematuria were diagnosed with transitional cell carcinoma. Cytology was positive in 3 patients, atypical in 1 an ...
In this paper are described some properties of emergent phenomena and situations that appear in complex systems. The basic factors for the understanding to emergent processes are: the level of realization and the description of the emergent process, sharp change of the system structure (in our case represented by the violence of a structural invariant), a self-organizing phenomenon (that forms the emergent situation). In this paper we will deal only with the factor of the violence of structural ...
In 65 jejunolleal (JI) bypasses done from 1973-1979, there were nine Scott and 56 Payne (with Y-shaped anastomosis). Preoperative excess body weight (EBW) translated to the 1983 Metropolitan Tables was 112 +/- 30%. Eight patients are lost to follow-up. We reversed seven patients for renal stones (12%) accompanied by a vertical banded gastroplasty (VBG) and one because she demanded a VBG. Five patients were reversed by surgeons elsewhere for minor problems (three with an accompanying gastric redu ...
A 67-year-old woman was admitted to our hospital for surgical management of cancer of the ascending colon. On admission, she had cholangitis due to choledocholithiasis. Abdominal computed tomography, ultrasonography, and magnetic resonance showed cholelithiasis, choledocholithiasis, and multiple liver tumors. Colonoscope showed advanced cancer of the ascending colon. Because of acute obstructive suppurative cholangitis, endoscopic sphincterotomy was performed. During the procedure, periampullary ...
In cholelithiasis, visualization of the gallbladder by cholecystography is frequently impossible. To decide on the indications for surgery in cholelithiasis, it is extremely important to study the causes of non-visualization of gallbladder. During the past several years, we have studied the causes of non-visualization of gallbladder with emphasis on cases in which cholecystography failed to give visible opacification of gallbladder. In the present study, the causes of such non-visualization conf ...
BACKGROUND/OBJECTIVES Pigmentous gallstones occur in South Indians despite significant higher levels of circulating cholesterol. This study was conducted to identify the biochemical and/or genetic causes for the formation of pigmentous gallstones in this ethnic group. METHODS Plasma lipid profile, bile cholesterol, acids, and phospholipid levels were estimated in patients with gall stone disease and age, sex matched controls using standard protocols. Twenty-seven SNPs related to cholesterol an ...
We studied renal function an average of 44 months after simultaneous bilateral renal SWL in 56 patients. No cases of clinically apparent acute renal failure occurred in the early postoperative period. The glomerular filtration rate (GFR) was calculated using an empiric formula having a significant correlation with measured creatinine clearance, and a change of 20% or greater was considered a clinically significant deterioration in renal function. Of the seven patients with a preoperative serum c ...
The biliary ultrasound scans of 132 patients having a laparotomy for jaundice have been reviewed to assess the role of ultrasound in the selection of patients for surgery. When scans were technically satisfactory the finding of a dilated extrahepatic duct (EHD) indicated obstructive jaundice in all cases, but the obstructing lesion in 5 per cent of such cases was too proximal for jaundice to be relieved by direct surgical decompression. Scans were further classified on the basis of abnormalities ...
The hydrolysis of urea by the bacterial enzyme urease pathologically increase urinary ammonia, bicarbonate, carconate and alkalinity. These factors contribute to the formation of urinary stones and to the virulence of bacteria. Acetohydroxamic acid, a potent inhibitor of urease, has been administered to 23 patients with staghorn renal calculi and urea-splitting urinary infection. Urinary ammonia and alkalinity has been reduced in every patient. A dose of 1.0 gm. acetohydroxamic acid daily has be ...
New developments in the management of gallstone disease, and particularly percutaneous and extracorporeal treatments that leave the mucosa intact, have renewed interest in the relationship between cholelithiasis and carcinoma. These treatments are both available in our hospital and to examine this question we studied the patients presenting between 1980 and 1990 with gallbladder cancer. The study comprised 21 patients with histologically proven carcinoma. The M:F ratio was 1:4 with a mean age of ...
Extracorporeal shock-wave lithotripsy has altered the therapeutic approach to urinary stone disease. Recently, a method was developed in which shock-wave generation is obtained piezoelectrically. To evaluate the effect of extracorporeal piezoelectric lithotripsy (EPL) on renal function, 20 patients were studied prior to and after EPL of renal calculi. Renal cortical function was evaluated by using a previously described and validated quantitative single photon emission computerized tomography (S ...