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Low anion gap

Jason An, Branko Braam
Rationale: We hope to increase awareness that hypokalemic paralysis may be the first presentation of Sjögren syndrome, for which potassium-sparing diuretics can be an effective adjunct to potassium replenishment. Presenting concerns: A 73-year-old female presented to a peripheral hospital with quadriparesis and a critically low serum potassium of 1.6 mmol/L with U waves on the electrocardiogram (ECG). The initial arterial blood gas showed a pH of 7.19, bicarbonate of 13 mEq/L, and a CO2 of 35 mm Hg...
2018: Canadian Journal of Kidney Health and Disease
Jian Wang, Oleg I Lebedev, Kathleen Lee, Juli-Anna Dolyniuk, Peter Klavins, Sabah Bux, Kirill Kovnir
A new type-I clathrate, Ba8 Cu14 Ge6 P26 , was synthesized by solid-state methods as a polycrystalline powder and grown as a cm-sized single crystal via the vertical Bridgman method. Single-crystal and powder X-ray diffraction show that Ba8 Cu14 Ge6 P26 crystallizes in the cubic space group Pm 3 n (no. 223). Ba8 Cu14 Ge6 P26 is the first representative of anionic clathrates whose framework is composed of three atom types of very different chemical natures: a transition metal, tetrel element, and pnicogen. Uniform distribution of the Cu, Ge, and P atoms over the framework sites and the absence of any superstructural or local ordering in Ba8 Cu14 Ge6 P26 were confirmed by synchrotron X-ray diffraction, electron diffraction and high-angle annular dark field scanning transmission electron microscopy, and neutron and X-ray pair distribution function analyses...
December 1, 2017: Chemical Science
Tatiana A Shestimerova, Natallia A Yelavik, Andrei V Mironov, Alexey N Kuznetsov, Mikhail A Bykov, Anastasia V Grigorieva, Valentina V Utochnikova, Leonid S Lepnev, Andrei V Shevelkov
We report the synthesis, crystal structures, and optical properties of two new compounds, K18 Bi8 I42 (I2 )0.5 ·14H2 O (1) and (NH4 )7 Bi3 I16 (I2 )0.5 ·4.5H2 O (2), as well as the electronic structure of the latter. They crystallize in tetragonal space group P4/ mmm with the unit cell parameters a = 12.974(1) and c = 20.821(3) Å for 1 and a = 13.061(3) and c = 15.162(7) Å for 2. Though 1 and 2 are not isomorphous, their crystal structures display the same structural organization; namely, the BiI6 octahedra are linked by I2 units to form disordered layers in 1 and perfectly ordered chains in 2...
March 22, 2018: Inorganic Chemistry
Nimai Pathak, Partha Sarathi Ghosh, Suryansh Saxena, Dhanadeep Dutta, Ashok Kumar Yadav, Dibyendu Bhattacharyya, Shambhu Nath Jha, Ramakant Mahadeo Kadam
Activator-free zinc aluminate (ZA) nanophosphor was synthesized through a sol-gel combustion route, which can be used both as a blue-emitting phosphor material and a white-emitting phosphor material, depending on the annealing temperature during synthesis. The material also has the potential to be used in optical thermometry. These fascinating color-tunable emission characteristics can be linked with the various defect centers present inside the matrix and their changes upon thermal annealing. Various defect centers, such as anionic vacancy, cationic vacancy, antisite defect, etc...
April 2, 2018: Inorganic Chemistry
Ricardo Capitao, Carlos Bello, Ricardo Fonseca, Catarina Saraiva
The authors describe a case of a life-threatening diabetic emergency 25 days after initiation of nivolumab (3 mg/kg) for stage 4 lung adenocarcinoma. She was admitted to the emergency department, with hyperglycaemia-related signs and symptoms, such as polyuria, polydipsia, weight loss, confusion, asthenia, dehydration, hypotension and Kussmaul respiratory pattern. Her body mass index was 21.9 kg/m2 and she did not show acanthosis nigricans. Arterial blood gas determination revealed high anion gap metabolic acidaemia and blood tests showed hyperglycaemia (1060 mg/dL), hyperketonaemia (beta-hydroxybutyrate: 6...
January 29, 2018: BMJ Case Reports
Hong Chen, Yu-Kun Chen, Hua Lin, Jin-Ni Shen, Li-Ming Wu, Xin-Tao Wu
A quaternary narrow-band-gap semiconductor, Ba2 Cr4 GeSe10 , has been discovered by solid-state reaction. It features a new structure type and crystallizes in the triclinic space group P1̅ (No. 2). The featured 2D anionic layers are constructed by condensed CrSe6 octahedra that are stacking along the c axis, with dispersed GeSe4 tetrahedra and located Ba2+ cations forming these layers. The energy-band structure shows a clear separation between the region of electronic conduction and the zone of electronic insulation...
February 5, 2018: Inorganic Chemistry
Ming Liu, Guohua Zhong, Yongming Yin, Jingsheng Miao, Ke Li, Chengqun Wang, Xiuru Xu, Clifton Shen, Hong Meng
Bright and stable blue emitters with narrow full-width at half-maxima are particularly desirable for applications in television displays and related technologies. Here, this study shows that doping aluminum (Al3+ ) ion into CsPbBr3 nanocrystals (NCs) using AlBr3 can afford lead-halide perovskites NCs with stable blue photoluminescence. First, theoretical and experimental analyses reveal that the extended band gap and quantum confinement effect of elongated shape give rise to the desirable blueshifted emission...
November 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Yusuke Sakaguchi, Takayuki Hamano, Keiichi Kubota, Tatsufumi Oka, Satoshi Yamaguchi, Ayumi Matsumoto, Nobuhiro Hashimoto, Daisuke Mori, Yasue Obi, Isao Matsui, Yoshitaka Isaka
BACKGROUND AND OBJECTIVES: Circulating levels of anions that bind to magnesium and calcium are often altered in patients with CKD. However, it is unknown how these alterations affect the ionized fraction of magnesium and calcium. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: This cross-sectional study involved patients on maintenance hemodialysis and patients not on dialysis who visited the outpatient department of nephrology. We collected whole-blood samples to measure ionized magnesium and calcium concentrations...
February 7, 2018: Clinical Journal of the American Society of Nephrology: CJASN
Randula Ranawaka, Kavinda Dayasiri, Manoji Gamage
BACKGROUND: Distal (Type 1) renal tubular acidosis (dRTA) is characterized by inability to secrete hydrogen irons from the distal tubule. The aetiology of dRTA is diverse and can be either inherited or acquired. Common clinical presentations of dRTA in the paediatric age group include polyuria, nocturia, failure to thrive, constipation, abnormal breathing and nephrolithiasis. Though persistent hypokalemia is frequently seen in dRTA, hypokalemic muscular paralysis is uncommon and rarely described in children...
November 25, 2017: BMC Research Notes
A Gągor, G Banach, M Węcławik, A Piecha-Bisiorek, R Jakubas
The easy to prepare and stable in air (2-methylimidazolium) tetraiodoantimoniate(iii) single-crystals with optical band gap of 2.17(1) eV at room temperature have been synthesized. The crystal structure features one-dimensional [SbI4 ]- n anionic chains, which are intercepted with stacks of 2MIm+ ions. At 294/295 K, it undergoes a structural phase transition to an incommensurately modulated phase as a result of subtle, lone-pair-electron-driven distortions of the anions. Separately from the anion displacements, the ordering of 2MIm+ countercations takes place over a wide temperature range of the modulated phase...
December 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
Julia E von Oettingen, Erinn T Rhodes, Joseph I Wolfsdorf
AIMS: Data are sparse concerning use of serum electrolyte parameters as compared to venous blood gas (VBG) measurements to monitor acid-base status during treatment of diabetic ketoacidosis (DKA). We explored the utility of various parameters to define DKA resolution by investigating the relationship of venous pH (vpH), anion gap (AG), serum bicarbonate (HCO3 ), and glucose concentration during management of DKA in children with new onset diabetes mellitus (NODM). METHODS: We included all patients with NODM presenting with DKA to Boston Children's Hospital from 10/1/07-7/1/13...
January 2018: Diabetes Research and Clinical Practice
Stella Andrea Glasmacher, William Stones
OBJECTIVE: This systematic review and meta-analysis seeks to determine the validity of the anion gap to screen for hyperlactatemia in critically ill patients. We have previously shown that the anion gap does not predict 31-day and in-hospital mortality in critically ill patients. The present review aims to add confirmatory evidence to identify whether the anion gap is a suitable tool for risk stratification in low-resource countries. RESULTS: Nine studies reporting on 4504 samples from 2111 patients were included...
November 3, 2017: BMC Research Notes
Kalani L Raphael, Sarah Gilligan, Joachim H Ix
BACKGROUND AND OBJECTIVES: Low urine ammonium excretion is associated with ESRD in CKD. Few laboratories measure urine ammonium, limiting clinical application. We determined correlations between urine ammonium, the standard urine anion gap, and a modified urine anion gap that includes sulfate and phosphate and compared risks of ESRD or death between these ammonium estimates and directly measured ammonium. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: We measured ammonium, sodium, potassium, chloride, phosphate, and sulfate from baseline 24-hour urine collections in 1044 African-American Study of Kidney Disease and Hypertension participants...
February 7, 2018: Clinical Journal of the American Society of Nephrology: CJASN
Ai-Huan Sun, Jie Pan, Song-De Han, Xu-Yan Xue, Qi Wei, Jin-Hua Li, Guo-Ming Wang
Three heterometallic iodides featuring the novel in situ modified ligands N,N',N″-trimethyl-2,4,6-tris(4-pyridyl)-1,3,5-triazine (Me3 tpt3+ ), N,N'-dimethyl-2,4,6-tris(4-pyridyl)-1,3,5-triazine (Me2 tpt2+ ), and N-monomethyl-2,4,6-tris(4-pyridyl)-1,3,5-triazine (Metpt+ ), [Pb3 CuI10 (Me3 tpt)] (1), [Pb5 Cu2 I16 (Me2 tpt)2 ] (2), and [Pb3 Cu6 I14 (Metpt)2 ] (3), were synthesized. Compound 1 exhibits a chain structure, in which the Pb4 I16 units are connected by the CuI3 units. The negative charge of the resulting chain is balanced by the cationic Me3 tpt3+ groups...
November 20, 2017: Inorganic Chemistry
B Vinodh Kumar, M Sivalingam, G Shiva Kumaran, Balambal Balakrishnan
Distal renal tubular acidosis (RTA) manifests either as Complete/Classical form or Incomplete/Latent Form. Distal RTA causes normal anion gap metabolic acidosis and hypokalemia. Interstitial Nephritis is the most frequent renal manifestation of Sjogren's, which presents as Distal RTA in 25-40% of patients with Sjogren's syndrome. Magnesium deficiency is frequently associated with hypokalemia. Although serum calcium is the main physiological control for the secretion of parathyroid hormone (PTH) by the parathyroid, serum magnesium can also exert similar effects...
October 2017: Indian Journal of Clinical Biochemistry: IJCB
Quinn D Gibson, Matthew S Dyer, George F S Whitehead, Jonathan Alaria, Michael J Pitcher, Holly J Edwards, John B Claridge, Marco Zanella, Karl Dawson, Troy D Manning, Vin R Dhanak, Matthew J Rosseinsky
Layered two-anion compounds are of interest for their diverse electronic properties. The modular nature of their layered structures offers opportunities for the construction of complex stackings used to introduce or tune functionality, but the accessible layer combinations are limited by the crystal chemistries of the available anions. We present a layered three-anion material, Bi4O4Cu1.7Se2.7Cl0.3, which adopts a new structure type composed of alternately stacked BiOCuSe and Bi2O2Se-like units. This structure is accessed by inclusion of three chemically distinct anions, which are accommodated by aliovalently substituted Bi2O2Se0...
October 25, 2017: Journal of the American Chemical Society
Mohammad Raza, Fehmina Arif, Pirthvi Raj Giyanwani, Saad Azizullah, Sonum Kumari
Von Gierke's disease, also known as glycogen storage disease (GSD) type 1A, is an autosomal recessive disease in which there is an inability to cleave glycogen to glucose because of a glucose 6 phosphate deficiency resulting in hypoglycemia and lactic acidosis. The patient may present with hepatomegaly and signs and symptoms of hypoglycemia. We diagnosed a case of Von Gierke's disease in a seven-month-old female infant who was admitted for abdominal distension, vomiting, and lethargy for a duration of four months with characteristic rounded doll's face, fatty cheeks, protuberant abdomen, and massive hepatomegaly...
August 8, 2017: Curēus
Yingying Tang, Cheng Peng, Wenbin Guo, Jun-Feng Wang, Gang Su, Zhangzhen He
Search for a new geometrically frustrated lattice is a great challenge. Herein, we report on a successful synthesis of two new layered compounds BiOCu2(XO3)(SO4)(OH)·H2O [X = Te (1) and Se (2)] with a new type of geometrically frustrated lattice (i.e., the octa-kagomé lattice) between kagomé and star motifs. Magnetic measurements confirmed that 1 exhibits a spin gap ground state, while 2 possesses a typical antiferromagnetic ordering at low-temperature. Such different magnetic behaviors between two isostructural compounds are suggested to originate from a slightly structural modification induced by nonmagnetic XO3 anionic groups...
October 11, 2017: Journal of the American Chemical Society
Maria-Gabriela Alexandru, Diana Visinescu, Sergiu Shova, Francesc Lloret, Miguel Julve
A new series of cyanido-bridged {LnIII WV } heterobinuclear complexes of formula [LnIII (pyim)2 (i-PrOH)(H2 O)2 (μ-CN)WV (CN)7 ]·2H2 O [Ln = Gd (1), Tb (2), Dy (3), Ho (4), and Er (5); pyim = 2-(1H-imidazol-2-yl)-pyridine) and i-PrOH = isopropyl alcohol] were synthesized by one-pot reaction between (NH3 Bu)3 [W(CN)8 ] and [Ln(pyim)2 ]2+ complexes (generated in situ by mixing the corresponding LnIII ions and the pyim ligand). Compounds 1-5 are isomorphous and crystallize in the monoclinic system P21 /n space group...
October 16, 2017: Inorganic Chemistry
Delia A Haynes, Laura J van Laeren, Orde Q Munro
Herein we delineate an unusual one-dimensional coordination polymer (CP), 3, prepared from S = 1/2 Co(TPP), 1 (TPP = 5,10,15,20-tetraphenylporphyrin dianion), and S = 1/2 4-(4'-pyridyl)-1,2,3,5-dithiadiazolyl (py-DTDA) radical, 2. The atypically long S-S distance for CP 3 (2.12 Å) reflects fractional electron transfer from the formally Co(II) ion into the antibonding π-SOMO of the metal-bound py-DTDA bridging ligand. The bonding in solid CP 3 involves noninteger redox states in a resonance hybrid repeat unit best formulated as [Co(TPP)](0...
October 4, 2017: Journal of the American Chemical Society
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