Mechanical evaluation of the effect of the rod to rod distance on the stiffness of uniplanar external fixator frames

PURPOSE

To investigate the effect of the rod-to-rod distance on the mechanical stability of single-rod and double-rod external fixator frames.

METHODS

 Four different constructs, one single-rod and three double-rod constructs with different rod-rod distances, were subjected to the axial, bending, and torsional forces. The stiffness of different configurations was calculated.

RESULTS

 Single-rod configuration had statistically the lowest stiffness when subjected to the axial, bending, and torsional forces. Maximum stiffness against the axial and anterior-posterior bending forces was achieved when the rod-rod distance was adjusted to 50 mm (halfway between the first rod and the end of the Schanz pins). There was no statistically significant difference in lateral bending stiffness among different double-rod configurations (p value: 0.435). The maximum stiffness against torsional forces was achieved when the rod-rod distance was adjusted to 100 mm (the second rod at the end of the Schanz pins).

CONCLUSION

 Double-rod uniplanar external fixator frames are significantly stiffer than the single-rod constructs, and however, the rod-rod distance can significantly affect the construct stiffness. We found that a frame with 50 mm rod-rod distance was the optimum fixator among tested configurations that allowed a balance between axial, bending, and torsional stiffness of the construct.

Live attenuated Leishmania major p27 gene knockout as a novel vaccine candidate: A study on safety, protective immunity and efficacy against canine leishmaniasis caused by Leishmania infantum

Canine leishmaniasis (CanL) is an important parasitic e disease caused by Leishmania infantum and is transmitted by female phlebotomine sand flies primarily between canines and secondarily to humans. Recently, we showed that immunization with Leishmania major p27 gene knockout (Lmp27^-/-) as a live attenuated vaccine was safe, induced immunogenicity, and protected against the development cutaneous and visceral leishmaniasis in mice. The p27 protein is a component of the COX protein complex which is responsible for ATP production. In this study, we analyzed the Lmp27^-/- candidate vaccine potential with this regard to the safety and induction of immunogenicity and protection against CanL. Variables such a clinical manifestation, anti-Leishmania antibodies using direct agglutination test (DAT), lymphocyte proliferation, delayed-type hypersensitivity (DTH), bone marrow aspiration (BMA) and parasite burden using parasitological and molecular examinations were measured. The results demonstrated that the Lmp27^-/- vaccinated group showed no clinical signs after inoculation with Lmp27^-/- mutant during a 12-month follow-up, and had significantly higher T-cell responses (Lymphocyte proliferation and DTH), lower seroconversion and parasite burdens following a challenge inoculation with L. infantum after 6-mounth. In conclusion, vaccination with Lmp27^-/- parasites would be safe and provide significant immunoprotectivity and efficacy against infection with wild type (WT) L. infantum.

The effect of attentional instructions during modeling on gaze behavior and throwing accuracy in 7 to 10 year-old children

Research has shown the effectiveness of attentional instructions and observation on the performance and learning in children. However, there is little research on the effects of instruction that manipulates attentional focus during observation. The purpose of the study was to investigate performance following instructions that directed an individual to focus internally or externally during the viewing of a model. Eye tracking was also used to investigate the visual search strategy under different instructional groups. 24 children between the ages of 7 and 10 years were randomly divided into an internal (IFM) or external (EFM) modeling group. Children performed a 10-trial pre-test to measure throwing accuracy and quiet eye duration (QED). Following pre-test, children observed a model performing the correct overarm throw 10 times while eye movement was recorded. They then performed a 10-trial post-test. Results revealed that both groups improved accuracy from pre-test to post-test (p < .001) and increased QED from pre- to post-test (p < .001). It was also observed that EFM had greater accuracy and (p = .01) and longer QED (p < .001) than IFM during post-testing. Evidence was also observed for adherence to the attentional focus strategy as EFM and IFM looked more frequently at the specific cue provided (p < .001). Directing visual attention to the movement effects while observing a model significantly benefits motor performance and learning in children. Changing the focus of instruction to an external focus improved both throwing accuracy and increased QED.

Molecular and heterogeneous water oxidation catalysts: recent progress and joint perspectives

The recent synthetic and mechanistic progress in molecular and heterogeneous water oxidation catalysts highlights the new, overarching strategies for knowledge transfer and unifying design concepts.

Comparing relationship between spiritual well-being and death anxiety among women with breast and cervical cancers and women with gastric and colorectal cancers

BACKGROUND

Death anxiety is one of the most common problems among women with cancer, which can affect the useful treatment process. With regard to the superior role of spiritual well-being over other aspects of health, the present study is aimed to compare the relationship between spiritual well-being and death anxiety among women with breast and cervical cancers and women with gastric and colorectal cancers.

METHODOLOGY

This was a descriptive-correlational study. Research statistical population included Iranian women with cancer at major hospitals in Isfahan, Iran. 160 research samples were selected through convenience sampling method based on inclusion criteria using a demographic questionnaire, spiritual well-being scale (Paloutzian et al.) and death anxiety scale (Templer). Research data were analyzed through SPSS 22 using independent t-test, Pearson's correlation, and analysis of variance at significance level 0.05.

RESULTS

The study findings indicated a significant inverse relationship between death anxiety and spiritual well-being (at 0.05) in both groups. As a result, people with higher spiritual well-being would experience less anxiety about death. In addition, the relationship between death anxiety and spiritual well-being in women with gastric and colorectal cancers was stronger than those with breast and cervical cancers.

CONCLUSION

Spiritual well-being is of effective factors of death anxiety among women suffering from cancer. Spirituality and meeting spiritual needs are considered as nursing care priorities for these women. Furthermore, paying attention to the spirituality by nurses may shield against individual difficulties.

The relationship between spiritual well-being and hope, and adherence to treatment regimen in patients with diabetes

Background

Adherence to treatment regimen is one of the behaviors related to diabetes, which has predicted successful control of the disease and reduced its intensity as well as negative consequences. This study aimed to determine the relationship between spiritual well-being and hope, and adherence to treatment regimen in patients with type II diabetes referred to diabetes clinics.

Methods

In this descriptive-correlational study, 227 diabetic patients referred to healthcare centers and diabetes clinics affiliated to Shiraz University of Medical Sciences were selected via cluster sampling (clinics) followed by convenience sampling (patients). The study data were collected using a demographic information form, spiritual well-being scale developed by Ellison and Paloutzian, Herth hope scale, and adherence to treatment regimen questionnaire. Then, the data were entered into the statistical software and were analyzed using descriptive and inferential statistics.

Results

The results indicated that most participants had moderate spiritual well-being, high hope, and low adherence to treatment regimen. Additionally, spiritual well-being was directly associated with hope and reversely related to adherence to treatment. A significant reverse correlation was also observed between hope and adherence to treatment.

Conclusion

Considering the fact that spiritual well-being and hope were reversely associated with adherence to treatment regimen, further studies should be done in this field. Also patients' image of God and their interpretations of being sick might not be appropriate and need correction.

Type 1 diabetes genetic risk score discriminates between monogenic and Type 1 diabetes in children diagnosed at the age of <5 years in the Iranian population

AIM

To examine the extent to which discriminatory testing using antibodies and Type 1 diabetes genetic risk score, validated in European populations, is applicable in a non-European population.

METHODS

We recruited 127 unrelated children with diabetes diagnosed between 9 months and 5 years from two centres in Iran. All children underwent targeted next-generation sequencing of 35 monogenic diabetes genes. We measured three islet autoantibodies (islet antigen 2, glutamic acid decarboxylase and zinc transporter 8) and generated a Type 1 diabetes genetic risk score in all children.

RESULTS

We identified six children with monogenic diabetes, including four novel mutations: homozygous mutations in WFS1 (n=3), SLC19A2 and SLC29A3, and a heterozygous mutation in GCK. All clinical features were similar in children with monogenic diabetes (n=6) and in the rest of the cohort (n=121). The Type 1 diabetes genetic risk score discriminated children with monogenic from Type 1 diabetes [area under the receiver-operating characteristic curve 0.90 (95% CI 0.83-0.97)]. All children with monogenic diabetes were autoantibody-negative. In children with no mutation, 59 were positive to glutamic acid decarboxylase, 39 to islet antigen 2 and 31 to zinc transporter 8. Measuring zinc transporter 8 increased the number of autoantibody-positive individuals by eight.

CONCLUSIONS

The present study provides the first evidence that Type 1 diabetes genetic risk score can be used to distinguish monogenic from Type 1 diabetes in an Iranian population with a large number of consanguineous unions. This test can be used to identify children with a higher probability of having monogenic diabetes who could then undergo genetic testing. Identification of these individuals would reduce the cost of treatment and improve the management of their clinical course.

Association of dietary patterns and risk of cardiovascular disease events in the MASHAD cohort study

BACKGROUND

Cardiovascular disease (CVD) is the principal cause of mortality and disability in Iranian adults. We aimed to evaluate the relationship between dietary patterns and CVD incidence in a large sample of adults in northeastern Iran.

METHODS

The present study comprised a prospective study of 5706 CVD-free men and women aged 35-65 years who participated in a cohort study. All of the participants were followed up for a 6-year period. Dietary patterns were derived from a 65-item validated food frequency questionnaire and the factor analysis method was used to determine dietary patterns.

RESULTS

We identified two major dietary patterns: (i) a Balanced dietary pattern (a high intake of green leafy vegetables, other vegetables, fruits, dairy products, red meats, poultry, seafoods, legumes and nuts, as well as a low intake of sugar) and (ii) a Western dietary pattern (a high intake of sugar, tea, egg, snacks, fast foods, potato, carbonated beverages, pickled foods, organs meat and butter) by factor analysis. The hazard ratio (HR) and 95% confidence intervals (CIs) of total CVD in the highest versus lowest tertiles of the Balanced pattern were 1.29 (95% CI = 0.67-2.47; P = 0.44). The HR and 95% CIs of CVD in the highest versus lowest tertiles of Western pattern were 2.21 (95% CI = 1.08-4.45; P = 0.03).

CONCLUSIONS

During the 6-year follow-up, we found that adherence to a Balanced dietary pattern was not significantly associated with CVD events. However, adherence to a Western dietary pattern was associated with a significantly increased risk of CVD events and its associated risk.

Pattern of Internet Use by Iranian Nursing Students. Facilitators and Barriers

OBJECTIVES

To evaluate the pattern of internet use and factors that facilitate or dissuade its use among nursing students from a university in Urmia, Iran.

METHODS

A cross-sectional, descriptive study was conducted with 162 nursing students selected through simple random sampling.

RESULTS

The findings indicated that 49.1% of the students used the internet from 15 to 60 min per day. The principal use of the internet was to search for scientific content in the Web. Factors that facilitated internet use were "ease of use" and "Access to experts to solve problems and answer questions", while the dissuasive factors were "lack of concentration", "cost of internet services", and preference for information provided by professors or available directly in textbooks. Internet use by the students was related with the use of this tool in classroom activities and with English fluency.

CONCLUSIONS

Students have an internet use pattern aimed at self-study that should be strengthened with knowledge of English, assignments online, familiarization with the use of electronic databases, and other strategies to motivate them to use this technology with greater frequency.

Molecular detection of Chlamydophila abortus, Coxiella burnetii, and Mycoplasma agalactiae in small ruminants' aborted fetuses in southern Iran

Abortion in sheep and goats has become increasingly important worldwide because of the significant economic losses and potential zoonotic implication of commonly involved pathogens. Therefore, this cross-sectional study was conducted in southern Iran to detect the Chlamydophila abortus and Coxiella burnetii, as zoonotic pathogens, and Mycoplasma agalactiae, as a neglected abortifacient agent in small ruminants' aborted fetuses, by using polymerase chain reaction (PCR). From a total of 300 aborted fetuses (183 sheep and 117 goats), 46 samples (15.5%) were positive by PCR, 11% for C. abortus, 2% for C. burnetii, and 3% for M. agalactiae. Also, the association of suggested risk factors with abortion due to these bacterial agents was investigated using univariable and multivariable logistic regression. Results of the statistical analysis showed significant association of C. abortus with flock size (OR = 2.82, P = 0.014), season (P < 0.05), and the number of pregnancy in the aborted dam (OR = 2.5, P = 0.05). Our results indicated that C. abortus has a relatively substantial role in small ruminant abortions, and C. burnetii and M. agalactiae are likely important abortifacient agents in our region, too. Regarding veterinary and/or public health importance of these bacterial agents, more attention from veterinary and/or human health services and, maybe, a surveillance system for control and prevention of them are recommended.

The comparison of mental health and marital satisfaction of fertile and infertile women referred to infertility center of Jahad Daneshgahi In Qom

Introduction

Infertility is a complex issue that affects individuals’ mental health. Also marital satisfaction can be affected by fertility status of couples. Then, it is one of the most important features of life satisfaction. So, the study of mental health and marital satisfaction of infertile and fertile women is considerable.

Objectives

This research has been done with the aim of study and comparison of marital satisfaction level and mental health of the women who have infertility problem with those who does not have this problem.

Method

In total, 180 persons (90 infertile women and 90 fertile women) were participating in this study. Participants were comprised of those referring to infertility center of Jahad Daneshgahi in Qom. They filled the general health questionnaire (GHQ) and enrich marital satisfactions questionnaire have been used. Acquired information analyzed with the independent t-tests and one-way variance analysis.

Results

Results showed infertile women have less mental health rather than fertile women and also according to results, there was significant difference in satisfaction level of the fertile and infertile women. The number of unsuccessful pregnancies whether in fertile women or infertile women didnot have considerable effect on the marital satisfaction, while, effect of this factor on marital satisfaction level of the infertile women was higher than that on the fertile women.

Conclusion

Generally, by inclusion of limitations in this plan, it is inevitable to emphasize on negative consequences of the infertility on spouses’ life and it is important to pay attention to its different dimensions.

Disclosure of interest

The authors have not supplied their declaration of competing interest.

The Study of Relationship Between Personality Traits and Job Satisfaction in Iran Khodro Company Experts in Iran

Job satisfaction among employees is a crucial issue in an organization and employer plays a vital role to fulfill their needs. Keeping job satisfaction high among workers can be of tremendous benefit to any organization, as happy employees will be more likely to produce work effectively. It has been assumed that personality traits can play an important role in people's dealing with the environmental issues such as work situations. By assuming this effectiveness, the main aim of this essay is to study the relationship between personality traits and job satisfaction. Explaining job satisfaction by using personality traits can enlighten weather job satisfaction depends only on type of organization or on some personality traits. In this regard, present study has investigated the relationship between job satisfaction and personality traits among Iran Khodro Company expert staff. To do so personality characteristics were measured by NEO-PI-R scale and job satisfaction was measured by Job Descriptive Index (JDI scale) that filled by experts of “Iran Khodro” company (111 men and women). Pearson correlation used to analyze the data. Results show that, neuroticism/emotional stability was associated with low job satisfaction (r = −0/713, P < 0/01). Also conscientiousness (r = 0/620) and agreeableness (r = 0/476) was significantly correlated with job satisfaction (P < 0/01). But the relationship between extraversion (r = −0/025) and openness to experience (r = 0/061) with job satisfaction was not significant. In addition, the results of this study emphasis on the effective role of age (r = −0/301) and job background (r = −0/330) on job satisfaction. But relationship between sexuality (r = 0/183) and marriage (r = 0/125) with job satisfaction was not significant.

Disclosure of interest

The authors have not supplied their declaration of competing interest.

Distribution of virulence genes and multiple drug-resistant patterns amongst different phylogenetic groups of uropathogenic Escherichia coli isolated from patients with urinary tract infection

A total of 85 Uropathogenic Escherichia coli (UPEC) isolates were screened against ceftiofur, oxacillin, nitrofurantoin and lincospectin using Kirby-Bauer disc diffusion method, following CLSI guidelines. Prevalence of virulent factor genes amongst the isolates was determined by PCR, using gene-specific primers against the different virulent factors. Statistical analysis of the data was performed using SPSS software. The prevalence of traT, ompT, Iss, malX and ibeA genes was 47.1%, 38.8%, 20%, 16.5% and 9.4%, respectively. The most prevalent gene in group A and D was traT, whilst in group B2 was Iss. The highest resistance has been shown against oxacillin (98.8%), followed by ceftiofur (77.6%), whilst resistance to lincospectin (2.4%) and nitrofurantoin (12.9%) had the lowest frequencies. Multidrug resistance was shown in 82.35% of the isolates, whilst this study recommend lincospectin and nitrofurantoin as choice drugs for treatment, but more investigation of the bacterial pathogenicity associated with urinary tract infection (UTI) may contribute to a better medical intervention.

Nursing support for parents of hospitalized children

BACKGROUND

Having a child in hospital is a stressful experience for most parents. Support from nurses can assist parents to maintain their parenting role and promote quality pediatric nursing care.

AIMS AND OBJECTIVES

The aim of the study is to describe the quality of nurse-parent support in Iranian parents of hospitalized children in pediatric sites.

METHODS

This was a descriptive study using a convenience sample. Two hundred and thirty parents (183 mothers and 47 fathers) with hospitalized children took part in this survey that used the Nurse Parent Support Tool (NPST). This validated instrument has 21 items and 4 subscales (Informational Giving and Communication Support; Emotional Support; Appraisal Support and Instrumental Support), and was translated into Farsi.

RESULTS

The total mean of the NPST was M = 4.1 (SD = 0.7). There was a significant difference between gender of the parents and the Instrumental Support subscale. Also, there was significant difference between among education level of parents and Emotional Support. In addition, there was significant difference related to the gender of the child and Information Giving and Communication Support and Appraisal Support. There was no significant difference in any of the subscales when analyzed for length of hospitalization, kind of diseases and age of children.

CONCLUSIONS

The findings indicate that parents received a high level of support from nurses. Nurses can promote the quality of family care and should be aware of the importance of the several types of nursing support in meeting the requests of parents. It is important that nurses continue to develop their knowledge about types of communication with the family, especially in providing support for the parent role.

Awareness, treatment and control of hypertension, dyslipidaemia and diabetes mellitus in an Iranian population: the IHHP study

We used data from the baseline survey from the Isfahan Healthy Heart Programme to determine the prevalence of hypertension, dyslipidaemia and diabetes among a representative samples of 12,514 adults living in 3 cities in the Islamic Republic of Iran. The prevalence of hypertension, dyslipidaemia and diabetes was 17.3%, 66.3% and 5.6% respectively. Awareness, treatment and control of hypertension were 40.3%, 35.3%, and 9.1% respectively. The rates for dyslipidaemia were 14.4%, 7.1% and 6.5% respectively, and 54.6% of diabetics were aware of their disease and 46.2% were under treatment.

Comparison of coping strategies in Iranian adolescents with cancer and their parents

The diagnosis and treatment of cancer in adolescence requires that adolescents and their parents learn to adjust to the changes associated with cancer. This article presents results about the relationship between parental and adolescent coping. This study examined 120 adolescents in Iran with cancer (aged 11-18) and their parents. Coping was assessed using the Coping Strategies Inventory. Findings showed that there was a positive linear correlation between adolescents' engagement coping and disengagement coping and that of their parents. Logistic regression analysis indicated that 35.5% of engagement coping of adolescents and 24.1% of adolescent disengagement coping was dependent on the parents' coping strategies. Results indicated that adolescents were able to adapt to cancer within the context of a strong family. Nurses may be able to promote adolescent coping strategies by teaching engagement coping to patients' families.

The metabolic syndrome in hypertensive and normotensive subjects: the Isfahan Healthy Heart Programme

INTRODUCTION

There are numerous correlations between hypertension and the metabolic syndrome, although this is not always the case. The objective of this study was to compare the prevalence of the metabolic syndrome and its different phenotypes among hypertensive and normotensive subjects.

MATERIALS AND METHODS

This cross-sectional study was performed on a representative sample of adults living in 3 cities in Iran. Among the 12,514 subjects selected by multi-stage random sampling, 1736 (13.9%) were hypertensive. The prevalence of the metabolic syndrome [according to the Adult Treatment Panel (ATP) III criteria] was significantly higher in hypertensive than normotensive subjects (51.6% versus 12.9%, respectively; OR, 7.15; 95% CI, 6.4 to 7.9). The metabolic syndrome was more prevalent in normotensive and hypertensive subjects living in urban areas than those living in rural areas (14.2% and 53.9% versus 9.5% and 45.6%, respectively, P < 0.05). The mean age of hypertensive subjects, with or without the metabolic syndrome, was not significantly different (55.7 +/- 12 years versus 55.4 +/- 15.5 years, P = 0.6). Hypertension with the metabolic syndrome was more prevalent in women than men (72% versus 28% respectively, P < 0.000), and in subjects living in urban areas than those in rural areas (75.1% versus 24.9%, respectively, P = 0.002).

CONCLUSION

The findings of this study indicate the need for metabolic screening in all hypertensive patients, and emphasise the importance of promoting primary and secondary prevention of high blood pressure and associated modifiable risk factors in order to counter the upcoming epidemic of non-communicable disease in developing countries.

Characterization of film-coated aerosol canisters using electrochemical impedance spectroscopy

Drug adhesion to the walls of an aerosol canister can be prevented/reduced by coating the canister with a hydrophobic polymer (e.g., a fluoropolymer). In this study, three batches of fluoropolymer-coated canisters were investigated by electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM). The EIS technique showed that only one of the batches presented as a monolithic, non-porous film. The other two batches were either partially porous or highly porous. Scanning electron micrographs showed evidence of cracks, within the films, but could not alone establish the porous nature of these defects. For the non-porous and partly porous films it was possible to use the EIS data to determine the approximate film thickness. Estimates of 2-4 microm were obtained for the mean film thickness. These values compared favorably with micrometer estimates obtained following acid dissolution of the aluminum canister. It remains to be seen whether the properties of the films (i.e., the porosity and film thickness, determined by EIS) translate to differences in drug adhesion. Nevertheless, the EIS technique was shown to be a powerful, non-destructive method that lends itself to the rapid analysis of batch-to-batch variation in film-coated canisters.

Persistence and tissue distribution of DNA in normal and immunodeficient mice inoculated with polyomavirus VP1 pseudocapsid complexes or polyomavirus

Introduction of DNA into normal and immunodeficient mice, alone or in complex with VP1 pseudocapsids, has been compared to DNA transfer by viral infection. Similar to natural infection and in contrast to plasmid alone, VP1 pseudocapsids efficiently introduced DNA, which remained for months in normal mice and possibly longer in B- and T-cell-deficient mice.

Susceptibility to polyoma virus tumorigenesis in X-linked immunodeficient (XID) and B-cell deficient (microMT) mice is not increased

Polyoma virus induced tumorigenesis is controlled by T-cells, while B-cells clear virus infection. In order to study if T-cells can override the tumorigenic effect of a long term disseminated viral infection, the tumorigenicity and persistence of polyoma virus in antibody deficient adult and newborn infected X-linked immunodeficient (XID) and microMT mice was followed. In newborn infected XID and CBA control mice (sensitive to tumorigenesis), the frequency of tumor development was similar, and viral DNA was persistent at least 10 months p.i. In polyoma-infected newborn and adult microMT, and control C57BL/6 mice (resistant to tumorigenesis) as well as in adult XID and CBA control mice, no polyoma tumors were observed. Nevertheless, viral DNA was detected in most tissues in all microMT mice throughout the 5-7 month observation period, whereas in the remaining groups of mice persistent viral infection was limited or not detected. We suggest that the tumorigenic potential of an extensive persistent polyoma virus infection can be overcome as long as a functional T-cell system is present.

Adult X-linked immunodeficiency (XID) mice, IGM-/- single knockout and IGM-/- CD8-/- double knockout mice do not clear polyomavirus infection

The importance of antibodies for elimination of polyomavirus infection and the prevention of virus induced oncogenesis was studied, X-linked immunodeficiency (XID) mice, IgM-/- single knockout and IgMI-/- CD8-/- double knockout mice, all defective in antibody production, and normal control mice were infected with polyomavirus as adults. The mice were followed for presence of polyoma DNA with a polyoma specific polymerase chain reaction (PCR) over 6 weeks post infection (p.i.), a time point at which polyomavirus DNA is no longer detected in normal adult infected mice. As expected, virus DNA was not detected in normal mice 6 weeks p.i. In both IgM-/- single knockout and IgM-/- CD8-/- double knockout mice a disseminated infection was still observed by 6 weeks p.i. and the latter group of mice succumbed around two months p.i. In XID mice, only one third of the mice were still positive for viral DNA 6 weeks p.i. No polyomavirus induced tumors were observed in any of the mice during the 2-4 month observation period.

[The effect of a dimenhydrinate combination of the cardiovascular system and cerebral blood circulation in the anaesthetized dog]

The influence of Vertigo-Vomex (VV) and Vertigo-Vomex Retard (VVR) on the perfusion rate of the a. carotis interna and on the peripheral circulation was tested in 30 anaesthetized dogs. These drugs represent beta-dimethylamino-ethyl-benzhydrylether-1,3-dimethyl-8-chloroxanthine (dimenhydrinate, Vomex A) with the addition of pyridine-3-carbonic acid (nicotinic acid, niacin) and pyridoxine-HCl (vitamin B6) and its retard preparation. A) Angiographic researches of the brain vessels after i.v. injection of VV. B) Perfusion rate in the a. carotis int. by electromagnetic flowmeter; measurements of blood pressure, heart rate, and acid-base balance; reactions after injection of niacin, dimenhydrinate, and pyridoxine-HCl as well as after a combination of both. C) Same measurements as in B but after oral application. In one out of four cases there was a dilation of the brain vessels, in two cases there was a small one, in one case there was none. Niacin induces a short-lasting augmentation of the perfusion rate in the a. carotis int. simultaneously with rising aortic blood pressure. Dimenhydrinate with pyridoxine-HCl slightly increases the heart rate. Combined with niacin the perfusion rate shortly increases immediately after injection of niacin without any rise of blood pressure but combined with a fall in blood pH and standard bicarbonate. After oral application of VVR there was a slight but not significant augmentation of the perfusion rate in the a. carotis int. combined with rising blood pressure but with no change of the blood pH. Therefore the certain intivertigineous effect of VV and VVR cannot be explained by a rise of the perfusion rate in the inner ear or in the brain. In view of our results the central effect of dimenhydrinate combined with niacin and pyridoxine-HCl hypothetically may be improved by metabolic influences on the cells and their membranes.