Percutaneous absorption of neat and aqueous solutions of 2-butoxyethanol in volunteers

OBJECTIVES

To study the influence of the presence of water on the dermal absorption of 2-butoxyethanol (BE) in volunteers.

METHODS

Six male volunteers were dermally exposed to 50%, 90% or neat w/w BE for 4 h on the volar forearm over an area of 40 cm(2). An inhalation exposure with a known input rate and duration served as a reference dosage. The dermal absorption parameters were calculated from 24-h excretion of total (free + conjugated) butoxyacetic acid (BAA) in urine and BE in blood, measured after both inhalation and dermal exposure.

RESULTS

The dermal absorption of BE from aqueous solutions was markedly higher than that of neat BE. The time-weighted average dermal fluxes were calculated from the urine and blood data and expressed in milligrammes per square centimetre per hour. The dermal fluxes obtained from cumulative 24-h excretion of BAA amounted to 1.34+/-0.49, 0.92+/-0.60 and 0.26+/-0.17 mg cm(-2) h(-1 )for 50%, 90% and neat BE, respectively. The dermal fluxes calculated from the BE blood data amounted to 0.92+/-0.34 and 0.74+/-0.25 mg cm(-2) h(-1 )for 50% and 90% BE, respectively. The permeation rates into the blood reached a plateau between 60 and 120 min after the start of exposure, indicating achievement of steady-state permeation. The apparent permeability coefficient K(p), was 1.75+/-0.53x10(-3) and 0.88+/-0.42x10(-3) cm h(-1 )for 50% and 90% BE, respectively.

CONCLUSION

The percutaneous absorption of BE from aqueous solution increased markedly when compared with neat BE. Even water content as low as 10% led to an approximate fourfold increase in the permeation rates. These findings are important for the health risk assessment of occupational exposure to BE, since BE is commonly used in mixtures that contain water. Exposure to aqueous solutions of 50% and 90% of BE may result in substantial skin absorption: if a 60-min skin contact of 1,000 cm(2) is assumed, dermal uptake would be four-times higher than the pulmonary uptake of an 8-h occupational exposure at a TLV of 100 mg m(-3). This clearly justifies the skin notation for BE. For the purpose of biological monitoring, both BE in blood and BAA in urine were shown to be reliable indicators of exposure.

Effect of distraction on children's pain during intravenous catheter insertion

PURPOSE

This study examined the effect of pressing a soft ball during intravenous catheter insertion (IVCI) on the intensity of pain in children ages 4-6 years.

DESIGN AND METHODS

In this quasi-experimental study, children in the intervention group were asked to press a soft ball with the opposite hand during IVCI and to immediately mark the Wong-Baker FACES Pain Rating Scale.

RESULTS

There was a significant difference in the intensity of pain between the control group (n = 30) and the intervention group (n = 30; p =.012).

PRACTICE IMPLICATIONS

Pressing a soft ball during IVCI may be an easily accessed, inexpensive, and effective technique to control or reduce pain in young children.

Push-out bond strength of quartz fibre posts to root canal dentin using total-etch and self-adhesive resin cements

Objectives: Several adhesive systems are available for cementation of fibre posts into the root canal. The aim of the present study was to investigate the push-out bond strengths of quartz fibre posts to root dentin with the use of different total-etch and self-adhesive resin cements. Study Design: Ninety single-rooted human premolars were endodontically treated and standardized post-spaces were prepared. Fibre posts were cemented with different luting agents: total-etch (Nexus NX3, Duo-Link, and RelyX ARC) and self-adhesive resin cements (Maxcem Elite, BisCem, and RelyX Unicem). Three post/dentin sections (coronal, middle and apical) were obtained from each specimen, and push-out bond strength test was performed in each section at a cross-head speed of 0.5 mm/min. Data was analyzed with two-factor and one-way analysis of variance and a post-hoc Tukey test at a significance level of p < 0.05. Results: Cement type, canal region, and their interaction significantly influenced bond strength. Significantly higher bond strength values were observed in the apical region of self-adhesive cements. Only Duo-Link and RelyX ARC cements resulted in homogeneous bond strengths. Conclusions: Cementation of quartz fibre posts using self-adhesive cements provided higher push-out bond strengths especially in the apical region, while total-etch cements resulted in more uniform bond strengths in different regions of the root canal.

Key words: Push-out bond strength; quartz fibre post; total-etch resin cement; self-adhesive resin cement.

Participant recruitment from minority religious groups: the case of the Islamic population in South Australia

BACKGROUND

Participant recruitment is a fundamental component of the research process and the methods employed to attract individuals will depend on the nature of the study. Recruitment may be more challenging when the study involves people from a minority religious group. However, this issue has not been well addressed in the literature.

AIM

To discuss the challenges of recruiting participants from a minority religious group (the Islamic population) to participate in an interpretive, hermeneutic study concerning the experience of hospitalization. The challenges of recruitment encountered during this study are used as the basis for a broader discussion of this important issue. To ensure the success of this phase of the study, a pre-planned recruitment strategy was essential.

METHODS

Multiple recruitment strategies were used, including hospital-based recruitment, snowball sampling, advertising and contact with key people. Despite the use of multiple strategies, recruitment of participants was difficult and required an extended period of time to achieve sufficiently rich data. Thirteen participants shared their lived experience to provide an in-depth understanding of the phenomenon. Recruiting participants from minority religious group involves potentially sensitive issues. There is an increased need for the researchers to carefully consider potential participants' rights and ensure that sound ethical principles underpin the study, as failure to do this may hinder the recruitment process.

FINDINGS

The two most effective strategies of recruitment were snowball sampling and contact with key Islamic people, with the least effective being advertising. This paper highlights the importance of anticipating potential difficulties and pre-planning strategies to overcome barriers to recruitment. Implementation of multiple strategies is recommended to ensure successful research recruitment.

Hepatitis-related stigma in chronic patients: A qualitative study

BACKGROUND

Hepatitis is one of health problems throughout the world. It has numerous consequences on patients' life. Stigma, depression, social marginalization and financial problems are some of the challenges in these patients.

AIM

The purpose of this qualitative study was to examine hepatitis-related stigma and discrimination in patients living with chronic hepatitis in Iranian society.

METHODS

This present study was designed as a qualitative method, and this article shows up the results of a qualitative research study undertaken with patients living with hepatitis in Iran. The study uses a content analysis method. A purposive sample of 18 patients was chosen. Data were collected through a semi-structured interview and field note that the researchers will take during participants' observation. Data analysis process was performed on the texts which were generated from verbatim transcripts of the participants interviews.

RESULTS

Participants were between 18 and 61 years old. The main theme, Stigma, emerged from three themes during the process data analysis in this study. These themes were including fear to lose of family and social support, fear to present in public and fear of transmission.

CONCLUSIONS

This research indicates that stigma presents major challenges not only for patients living with chronic hepatitis but also for nurses, other healthcare practitioners, family and social networks, institutions and society. The researcher suggests that interventions to reduce or eliminate stigma should require individual, structural, cultural thought, society and systemic changes.

Muslims in Australian hospitals: The clash of cultures

The objective of this paper is to review the multicultural nature of Australian society, with a specific focus on the Islamic culture. Islamic principles will be presented and the impact this has on the health-care provision of Muslim people will be explored. This paper highlights issues that Muslim patients face when hospitalized in Australia. Australia has seen a major shift in its society, from English-speaking European to one that boasts enormous cultural diversity. However, this cultural diversity poses a number of challenges for a Western-based health-care service based on differing needs and expectations. This challenge is perhaps most evident during times of illness, when the Muslim patient must attempt to adhere to the principles of their faith in the non-Islamic environment of the Australian hospital. The differences discussed in this paper serve to highlight the importance of having strategies that identify the needs and expectations of culturally diverse consumers of the hospital system.

Production of [Formula: see text] and [Formula: see text] in proton-proton collisions at [Formula: see text] 7 TeV

The production of the strange and double-strange baryon resonances ([Formula: see text], [Formula: see text]) has been measured at mid-rapidity ([Formula: see text][Formula: see text]) in proton-proton collisions at [Formula: see text] [Formula: see text] 7 TeV with the ALICE detector at the LHC. Transverse momentum spectra for inelastic collisions are compared to QCD-inspired models, which in general underpredict the data. A search for the [Formula: see text] pentaquark, decaying in the [Formula: see text] channel, has been carried out but no evidence is seen.

Informational support to family members of intensive care unit patients: the perspectives of families and nurses

Introduction:

The receiving information about the patients hospitalized in the intensive care unit is classified among the most important needs of the family members of such patients. Meeting the informational needs of families is a major goal for intensive care workers. Delivering honest, intelligible and effective information raises specific challenges in the stressful setting of the intensive care unit (ICU). The aim of this qualitative study was to explain perspectives of families of Intensive Care Unit patients and nurses about informational support.

Method:

Using a conventional content analysis approach, semi-structured interviews were conducted with participants to explore their perspectives of providing informational support to families of ICU patients. A purposeful sampling method was used to recruit nineteen family members of thirteen patients hospitalized in the ICU and twelve nurses from three teaching hospitals. In general, 31 persons participated in this study. Data collection continued to achieve data saturation.

Findings:

A conventional content analysis of the data produced three categories and seven sub-categories. The three main categories were as followed, a) providing information, b) handling information and c) using information. Providing information had three sub-categories consisting of “receiving admission news”, “receiving truthful and complete information” and receiving general information. Handling information had two sub-categories consisting ‘keeping information” and “gradual revelation”. Lastly, using information has two sub-categories consisting of “support of patient” and “support of family members”.

Conclusion:

The results of this study revealed perspectives of families of Intensive Care Unit patients and nurses about informational support. It also determines the nurses’ need to know more about the influence of their supportive role on family’s ICU patients informing. In addition, the results of present study can be used as a basis for further studies and for offering guidelines about informational support to the families of the patients hospitalized in the ICU.

Exclusive J/ψ photoproduction off protons in ultraperipheral p-Pb collisions at √(s(NN))=5.02 TeV

We present the first measurement at the LHC of exclusive J/ψ photoproduction off protons, in ultraperipheral proton-lead collisions at sqrt[s_{NN}]=5.02  TeV. Events are selected with a dimuon pair produced either in the rapidity interval, in the laboratory frame, 2.5<y<4 (p-Pb) or -3.6<y<-2.6 (Pb-p), and no other particles observed in the ALICE acceptance. The measured cross sections σ(γ+p→J/ψ+p) are 33.2±2.2(stat)±3.2(syst)±0.7(theor)  nb in p-Pb and 284±36(stat)_{-32}^{+27}(syst)±26(theor)  nb in Pb-p collisions. We measure this process up to about 700 GeV in the γp center of mass, which is a factor of two larger than the highest energy studied at HERA. The data are consistent with a power law dependence of the J/ψ photoproduction cross section in γp energies from about 20 to 700 GeV, or equivalently, from Bjorken x scaling variable between ∼2×10^{-2} and ∼2×10^{-5}, thus indicating no significant change in the gluon density behavior of the proton between HERA and LHC energies.

Measurement of pion, kaon and proton production in proton-proton collisions at [Formula: see text] TeV

The measurement of primary [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text] production at mid-rapidity ([Formula: see text] 0.5) in proton-proton collisions at [Formula: see text][Formula: see text] 7 TeV performed with a large ion collider experiment at the large hadron collider (LHC) is reported. Particle identification is performed using the specific ionisation energy-loss and time-of-flight information, the ring-imaging Cherenkov technique and the kink-topology identification of weak decays of charged kaons. Transverse momentum spectra are measured from 0.1 up to 3 GeV/[Formula: see text] for pions, from 0.2 up to 6 GeV/[Formula: see text] for kaons and from 0.3 up to 6 GeV/[Formula: see text] for protons. The measured spectra and particle ratios are compared with quantum chromodynamics-inspired models, tuned to reproduce also the earlier measurements performed at the LHC. Furthermore, the integrated particle yields and ratios as well as the average transverse momenta are compared with results at lower collision energies.

Measurement of prompt D-meson production in p-Pb collisions at √(s(NN))=5.02 TeV

The p_{T}-differential production cross sections of the prompt charmed mesons D^{0}, D^{+}, D^{*+}, and D_{s}^{+} and their charge conjugate in the rapidity interval -0.96<y_{cms}<0.04 were measured in p-Pb collisions at a center-of-mass energy sqrt[s_{NN}]=5.02  TeV with the ALICE detector at the LHC. The nuclear modification factor R_{pPb}, quantifying the D-meson yield in p-Pb collisions relative to the yield in pp collisions scaled by the number of binary nucleon-nucleon collisions, is compatible within the 15%-20% uncertainties with unity in the transverse momentum interval 1<p_{T}<24  GeV/c. No significant difference among the R_{pPb} of the four D-meson species is observed. The results are described within uncertainties by theoretical calculations that include initial-state effects. The measurement adds experimental evidence that the modification of the momentum spectrum of D mesons observed in Pb-Pb collisions with respect to pp collisions is due to strong final-state effects induced by hot partonic matter.

Production of K[Formula: see text](892)[Formula: see text] and [Formula: see text](1020) in p-Pb collisions at [Formula: see text] = 5.02 TeV

The production of K[Formula: see text](892)[Formula: see text] and [Formula: see text](1020) mesons has been measured in p-Pb collisions at [Formula: see text][Formula: see text] 5.02 TeV. K[Formula: see text] and [Formula: see text] are reconstructed via their decay into charged hadrons with the ALICE detector in the rapidity range [Formula: see text]. The transverse momentum spectra, measured as a function of the multiplicity, have a p[Formula: see text] range from 0 to 15 GeV/c for K[Formula: see text] and from 0.3 to 21 GeV/c for [Formula: see text]. Integrated yields, mean transverse momenta and particle ratios are reported and compared with results in pp collisions at [Formula: see text][Formula: see text] 7 TeV and Pb-Pb collisions at [Formula: see text][Formula: see text] 2.76 TeV. In Pb-Pb and p-Pb collisions, K[Formula: see text] and [Formula: see text] probe the hadronic phase of the system and contribute to the study of particle formation mechanisms by comparison with other identified hadrons. For this purpose, the mean transverse momenta and the differential proton-to-[Formula: see text] ratio are discussed as a function of the multiplicity of the event. The short-lived K[Formula: see text] is measured to investigate re-scattering effects, believed to be related to the size of the system and to the lifetime of the hadronic phase.

Translation, Cultural Adaptation and Validation of the Qualiveen-30 Questionnaire in Persian for Patients with Spinal Cord Injury and Multiple Sclerosis

OBJECTIVES

This study aimed to cross-culturally translate the Qualiveen-30 into Persian and validate it in Iranian patients with spinal cord injury (SCI) and multiple sclerosis (MS).

METHODS

This was a cross-sectional prospective validation study. The translation and cross-cultural adaptation of the original questionnaire was performed in accordance with published guidelines. A total of 154 patients with SCI or MS who suffered from lower urinary symptoms for at least 6 months were asked to complete the questionnaire in the first visit to the clinic and after 3 weeks. To assess reliability, the internal consistency was assessed by Cronbach's alpha coefficient, and validity was assessed using convergent and discriminant validities.

RESULTS

The Cronbach's alpha coefficients for the Qualiveen-30 at two assessments ranged from 0.82 to 0.95, indicating a good internal consistency for the questionnaire. There were high amounts of test-retest reliability for the Qualiveen questionnaire and each of its domains (ICC > 0.90). Also, Qualiveen and its domains had a moderate to high correlation with the International Consultation on Incontinence Questionnaire-Urinary Incontinence Short Form (ICIQ-UI SF) (0.36 < r < 0.57) and SF-12 MCS (-0.51 < r < -0.11) and SF-12 PCS (-0.29 < r < -0.19), indicating good convergent validity. Comparison of Qualiveen in groups of income, education and manner of voiding revealed the high discriminative power of this instrument. The hypothesized four factor structure was approved using confirmatory factor analysis (CFA).

CONCLUSIONS

In general, the Persian version of Qualiveen-30 performed is a reliable and valid measure for the evaluation of the quality of life related to lower urinary symptoms in patients with SCI or MS.

Centrality Dependence of the Charged-Particle Multiplicity Density at Midrapidity in Pb-Pb Collisions at sqrt[s_{NN}]=5.02 TeV

The pseudorapidity density of charged particles, dN_{ch}/dη, at midrapidity in Pb-Pb collisions has been measured at a center-of-mass energy per nucleon pair of sqrt[s_{NN}]=5.02  TeV. For the 5% most central collisions, we measure a value of 1943±54. The rise in dN_{ch}/dη as a function of sqrt[s_{NN}] is steeper than that observed in proton-proton collisions and follows the trend established by measurements at lower energy. The increase of dN_{ch}/dη as a function of the average number of participant nucleons, ⟨N_{part}⟩, calculated in a Glauber model, is compared with the previous measurement at sqrt[s_{NN}]=2.76  TeV. A constant factor of about 1.2 describes the increase in dN_{ch}/dη from sqrt[s_{NN}]=2.76 to 5.02 TeV for all centrality classes, within the measured range of 0%-80% centrality. The results are also compared to models based on different mechanisms for particle production in nuclear collisions.

Anisotropic Flow of Charged Particles in Pb-Pb Collisions at √[s{NN}]=5.02 TeV

We report the first results of elliptic (v_{2}), triangular (v_{3}), and quadrangular (v_{4}) flow of charged particles in Pb-Pb collisions at a center-of-mass energy per nucleon pair of sqrt[s_{NN}]=5.02  TeV with the ALICE detector at the CERN Large Hadron Collider. The measurements are performed in the central pseudorapidity region |η|<0.8 and for the transverse momentum range 0.2<p_{T}<5  GeV/c. The anisotropic flow is measured using two-particle correlations with a pseudorapidity gap greater than one unit and with the multiparticle cumulant method. Compared to results from Pb-Pb collisions at sqrt[s_{NN}]=2.76  TeV, the anisotropic flow coefficients v_{2}, v_{3}, and v_{4} are found to increase by (3.0±0.6)%, (4.3±1.4)%, and (10.2±3.8)%, respectively, in the centrality range 0%-50%. This increase can be attributed mostly to an increase of the average transverse momentum between the two energies. The measurements are found to be compatible with hydrodynamic model calculations. This comparison provides a unique opportunity to test the validity of the hydrodynamic picture and the power to further discriminate between various possibilities for the temperature dependence of shear viscosity to entropy density ratio of the produced matter in heavy-ion collisions at the highest energies.