Risk Groups for Needlestick Injury Among Healthcare Workers in Children‘s Hospital: A Cross-sectional Study

Objective: Needlestick injuries are important for healthcare workers due to their morbidity and mortality. The aim of this study was to determine the risk group of needlestick injuries (NSIs) among healthcare workers, and possible risk groups, actions, and prevention practices of the healthcare workers. Material and Methods: This cross-sectional study included 249 healthcare workers(doctors, nursing staff, laboratory technicians and the cleaning personnel) in a tertiary care pediatric hospital in Turkey. Results: Among the 249 healthcare workers, there were 35 physicians, 124 nursing staff, 11 laboratory technicians and 79 cleaning personnel. Seventy (28.1%) were males, 179 (71.9%) were females. The most common equipment associated with needlestick injury were syringe needles ( 54.6 %), followed by intravenous cannula (peripheral catheter) (17.2%). In 103 (41.2%) cases, the injury occurred during use of the needle, with the greater part of injuries (24%) while establishing a venous access. Most healthcare workers experienced hand injuries (%82.7). Conclusion: This study revealed that the high risk group for needlestick injury was nurses followed by the cleaning personnel. Healthcare workers did not take the necessary measures for themselves. Needlestick injuries could be prevented easily by increasing the use of needles when needed, increasing awareness for using devices with safety features, promoting education and safe work practices for needles and related systems.

Risk Groups for Needlestick Injury Among Healthcare Workers in Children‘s Hospital: A Cross-sectional Study

Objective: Needlestick injuries are important for healthcare workers due to their morbidity and mortality. The aim of this study was to determine the risk group of needlestick injuries (NSIs) among healthcare workers, and possible risk groups, actions, and prevention practices of the healthcare workers. Material and Methods: This cross-sectional study included 249 healthcare workers(doctors, nursing staff, laboratory technicians and the cleaning personnel) in a tertiary care pediatric hospital in Turkey. Results: Among the 249 healthcare workers, there were 35 physicians, 124 nursing staff, 11 laboratory technicians and 79 cleaning personnel. Seventy (28.1%) were males, 179 (71.9%) were females. The most common equipment associated with needlestick injury were syringe needles ( 54.6 %), followed by intravenous cannula (peripheral catheter) (17.2%). In 103 (41.2%) cases, the injury occurred during use of the needle, with the greater part of injuries (24%) while establishing a venous access. Most healthcare workers experienced hand injuries (%82.7). Conclusion: This study revealed that the high risk group for needlestick injury was nurses followed by the cleaning personnel. Healthcare workers did not take the necessary measures for themselves. Needlestick injuries could be prevented easily by increasing the use of needles when needed, increasing awareness for using devices with safety features, promoting education and safe work practices for needles and related systems.

Children with chronic-refractory autoimmune cytopenias: a single center experience

BACKGROUND AND OBJECTIVES

Autoimmune cytopenias are a group of heterogeneous disorders characterized by immune-mediated destruction of one or more hematopoietic lineage cells. The differential diagnosis of children with autoimmune cytopenias requires much time and laboratory investigations. The aim of the present study was to evaluate the clinical course and significance of autoimmune cytopenias due to immunodeficiency or autoimmune diseases in children at a single children`s hospital.

METHOD

Between February 1997 and September 2015, chronic/refractory autoimmune cytopenias patient data were evaluated retrospectively. Twenty-three patients were assessed in this study.

RESULTS

The median duration of following was 2.6 years (4 months-18.5 years). The median age of diagnosis was 3.1 years (6 months-16 years). A total of 13 patients (56.5%) had single-lineage and 10 (46.5%) had multilineage cytopenias. The most frequent single-lineage cytopenia was thrombocytopenia, followed by anemia. In 22 of the patients, cytopenias was detected before the primary diseases. All of the patients were treated with corticosteroids or intravenous immune globulin as first-line treatment. Ten patients (43.5%) needed second or further-line immunosuppressive therapies that patients diagnosed as systemic lupus erythematosus, hypogammaglobulinemia, or common variable immunodeficiency. A total of 8 patients (34.7%) recovered from autoimmune cytopenias after the treatment of primer disease. Cytopenias were continued in 14 patients.

CONCLUSION

Cytopenia may be the first finding of an immunodeficiency or autoimmune disease and primary disease may be diagnosed in the clinical course. Taking the new targeted treatment options into consideration; early diagnosis is likely to become more important in the near-future in order to begin the treatment for the underlying disease as early as possible.

Structure dependent optoelectronic properties of monolayer antimonene, bismuthene and their binary compound

The absorption spectra of antimonene, bismuthene, and their BiSb binary compound are revealed.

Onset of vertical bonds in new GaN multilayers: beyond van der Waals solids

A suspended single layer of GaN in a honeycomb structure is stable in a planar geometry. By stacking these GaN layers one can construct bilayers or multilayers, even new three-dimensional (3D) periodic structures. In this study, we clarified how the planar layers are buckled with the onset of vertical Ga-N bonds. Among the four stable phases of bilayer GaN, only one of them maintains the planar geometry, which is bound by weak van der Waals interactions. For the remaining three phases, the layers are buckled with the onset of weak vertical bonds, and attain total energies slightly lower than that of the planar geometry. Structural phase changes, as well as direct-indirect band transitions take place under strain and electrostatic charging. The vertical bonds become shorter in multilayers, and eventually attain the bulk value. Among the stable phases of 3D periodic GaN, only one with a graphite-like structure behaves as a layered, van der Waals solid; whereby others are 3D uniform crystals beyond the van der Waals solid.

Markers of inflammation and tolerance development in allergic proctocolitis

BACKGROUND

Today, as a result of an increase in the frequency of food protein-induced allergic proctocolitis (FPIAP), there is a need for studies not only to enlighten the pathophysiology of the disease but also to determine simple, non-invasive markers in both diagnosis, and evaluation of the development of tolerance. No study has been found in the literature about the place of neutrophil/lymphocyte ratio (NLR) and mean platelet volume (MPV), which are easy to calculate and non-invasive markers.

OBJECTIVES

The purpose is to determine the relation between NLR and MPV with the diagnosis and development of tolerance in children with FPIAP.

METHODS

In this retrospective cross-sectional study, clinical, demographic symptoms and laboratory findings of patients, monitored with FPIAP diagnosis in allergy and gastroenterology clinics, were acquired from the patient record system. Hemogram values at the time of diagnosis were compared with the values of healthy children of the same age and gender.

RESULTS

Among 59 patients diagnosed with FPIAP, males constitute 47.4% and females constitute 52.6%. MPV and platelet crit (PCT) values were significantly high when compared to the control group (n: 67) in FPIAP cases (p < 0.001). Also, MPV and PCT values were significantly high in non-tolerance developing cases when compared to developing ones (p= 0.01).

CONCLUSIONS

Contrary to NLR, MPV and PCT values have been considered to be good markers in predicting prognosis in cases with FPIAP since they are quick, cost effective and easy to calculate.

The effect of strain and functionalization on the optical properties of borophene

The variation of the optical properties of borophene by applying strain and surface functionalization is revealed.

Ab initio study of hydrogenic effective mass impurities in Si nanowires

The effect of B and P dopants on the band structure of Si nanowires is studied using electronic structure calculations based on density functional theory. At low concentrations a dispersionless band is formed, clearly distinguishable from the valence and conduction bands. Although this band is evidently induced by the dopant impurity, it turns out to have purely Si character. These results can be rigorously analyzed in the framework of effective mass theory. In the process we resolve some common misconceptions about the physics of hydrogenic shallow impurities, which can be more clearly elucidated in the case of nanowires than would be possible for bulk Si. We also show the importance of correctly describing the effect of dielectric confinement, which is not included in traditional electronic structure calculations, by comparing the obtained results with those of G₀W₀ calculations.

New Phases of Germanene

Germanene, a graphene-like single-layer structure of Ge, has been shown to be stable and recently grown on Pt and Au substrates. We show that a Ge adatom adsorbed on germanene pushes down the host Ge atom underneath and forms a dumbbell structure. This exothermic process occurs spontaneously. The attractive dumbbell-dumbbell interaction favors high coverage of dumbbells. This Letter heralds stable new phases of germanene, which are constructed from periodically repeating coverage of dumbbell structures and display diversity of electronic and magnetic properties.

Photoswitchable Molecular Rings for Solar-Thermal Energy Storage

Solar-thermal fuels reversibly store solar energy in the chemical bonds of molecules by photoconversion, and can release this stored energy in the form of heat upon activation. Many conventional photoswichable molecules could be considered as solar thermal fuels, although they suffer from low energy density or short lifetime in the photoinduced high-energy metastable state, rendering their practical use unfeasible. We present a new approach to the design of chemistries for solar thermal fuel applications, wherein well-known photoswitchable molecules are connected by different linker agents to form molecular rings. This approach allows for a significant increase in both the amount of stored energy per molecule and the stability of the fuels. Our results suggest a range of possibilities for tuning the energy density and thermal stability as a function of the type of the photoswitchable molecule, the ring size, or the type of linkers.

Polarization vortices in germanium telluride nanoplatelets: a theoretical study

Using first-principles calculations based on density functional theory, we study the properties of germanium telluride crystalline nanoplatelets and nanoparticles. Above a diameter of 2.7 nm, we predict the appearance of polarization vortices giving rise to an unusual ferrotoroidic ground state with a spontaneous and reversible toroidal moment of polarization. We highlight the crucial role of inhomogeneous strain in stabilizing polarization vortices. Combined with the phase-change properties of germanium telluride, the ferrotoroidic properties could be of practical interest for ternary logic applications.

Half-metallic silicon nanowires: first-principles calculations

From first-principles calculations, we predict that specific transition metal (TM) atom-adsorbed silicon nanowires have a half-metallic ground state. They are insulators for one spin direction, but show metallic properties for the opposite spin direction. At high coverage of TM atoms, ferromagnetic silicon nanowires become metallic for both spin directions with high magnetic moment and may have also significant spin polarization at the Fermi level. The spin-dependent electronic properties can be engineered by changing the type of adsorbed TM atoms, as well as the diameter of the nanowire. Present results are not only of scientific interest, but also can initiate new research on spintronic applications of silicon nanowires.

Transition-metal-ethylene complexes as high-capacity hydrogen-storage media

From first-principles calculations, we predict that a single ethylene molecule can form a stable complex with two transition metals (TM) such as Ti. The resulting TM-ethylene complex then absorbs up to ten hydrogen molecules, reaching to gravimetric storage capacity of approximately 14 wt %. Dimerization, polymerizations, and incorporation of the TM-ethylene complexes in nanoporous carbon materials are also discussed. Our results are quite remarkable and open a new approach to high-capacity hydrogen-storage materials discovery.

Size-dependent alternation of magnetoresistive properties in atomic chains

Spin-polarized electronic and transport properties of carbon atomic chains are investigated when they are capped with magnetic transition-metal (TM) atoms like Cr or Co. The magnetic ground state of the TM-C(n)-TM chains alternates between the ferromagnetic (F) and antiferromagnetic (AF) spin configurations as a function of n. In view of the nanoscale spintronic device applications the desirable AF state is obtained for only even-n chains with Cr; conversely only odd-n chains with Co have AF ground states. When connected to appropriate metallic electrodes these atomic chains display a strong spin-valve effect. Analysis of structural, electronic, and magnetic properties of these atomic chains, as well as the indirect exchange coupling of the TM atoms through non-magnetic carbon atoms are presented.

Atomic and electronic structure of carbon strings

This paper presents an extensive study of various string and tubular structures formed by carbon atomic chains. Our study is based on first-principles pseudopotential plane wave and finite-temperature ab initio molecular dynamics calculations. Infinite- and finite-length carbon chains exhibit unusual mechanical and electronic properties such as large cohesive energy, axial strength, high conductance, and overall structural stability even at high temperatures. They are suitable for structural and chemical functionalizations. Owing to their flexibility and reactivity they can form linear chain, ring, helix, two-dimensional rectangular and honeycomb grids, three-dimensional cubic networks, and tubular structures. Metal-semiconductor heterostructures and various quantum structures, such as multiple quantum wells and double-barrier resonant tunnelling structures, can be formed from the junctions of metallic carbon and semiconducting BN linear chains. Analysis of atomic and electronic structures of these periodic, finite, and doped structures reveals fundamentally and technologically interesting features, such as structural instabilities and chiral currents. The double covalent bonding of carbon atoms depicted through self-consistent charge density analysis underlies the chemical, mechanical, and electronic properties.