Transition support arrangements to support new graduate & novice nurses entry into perioperative nursing: A scoping review

Background and objectives

As novice nurses transition into the workforce, they often experience transition shock as they assimilate into a new role, causing cause significant stress, anxiety and job dissatisfaction. This phenomenon is commonly observed within the perioperative nursing speciality. The development of transition support programs is aimed at assisting novice nurses' transition by providing fundamental knowledge, socialisation, support, and training.This review aimed to uncover the support programs and their components available to nurses transitioning into the perioperative speciality. The research question that provided guidance for this review was 'What are the transition support arrangements, and their characteristics, to support new graduate nurses and novice nurses who are transitioning into perioperative nursing?'.

Literature search

Arksey & O'Malley's' five-step scoping review framework was used. The researchers performed a comprehensive literature search of PubMed, Proquest, CINHAL and SCOPUS with no limit on publication date until April 2023. A blinded screening process was undertaken, and the data extraction was tabulated. Data was presented as a narrative synthesis following thematic analysis.

Results

The initial search identified 537 publications. Screening and duplicate removal led to the exclusion of 512 publications. Of the 25 publications included in this review, two were primary research publications, while the other 23 were discussion papers. Analysis indicated that program approaches and components of programs were frequently described.

Conclusion

The findings highlight the significance of transition programs within the perioperative speciality area. However, the paucity of empirical evidence on the pedagogical underpinnings and evaluation of effectiveness indicates the need for further research. Conducting further research within perioperative transition to practice will enable programs to be designed based on theoretically-sound and evidence-based approaches to support nursing transition to practice within the speciality perioperative environment.

Advanced care planning in the early phase of COVID-19: a rapid review of the practice and policy lessons learned

Background

The importance of advance care planning (ACP) has been highlighted by the advent of life-threatening COVID-19. Anecdotal evidence suggests changes in implementation of policies and procedures is needed to support uptake of ACPs. We investigated the barriers and enablers of ACP in the COVID-19 context and identify recommendations to facilitate ACP, to inform future policy and practice.

Methods

We adopted the WHO recommendation of using rapid reviews for the production of actionable evidence for this study. We searched PUBMED from January 2020 to April 2021. All study designs including commentaries were included that focused on ACPs during COVID-19. Preprints/unpublished papers and Non-English language articles were excluded. Titles and abstracts were screened, full-texts were reviewed, and discrepancies resolved by discussion until consensus.

Results

From amongst 343 papers screened, 123 underwent full-text review. In total, 74 papers were included, comprising commentaries (39) and primary research studies covering cohorts, reviews, case studies, and cross-sectional designs (35). The various study types and settings such as hospitals, outpatient services, aged care and community indicated widespread interest in accelerating ACP documentation to facilitate management decisions and care which is unwanted/not aligned with goals. Enablers of ACP included targeted public awareness, availability of telehealth, easy access to online tools and adopting person-centered approach, respectful of patient autonomy and values. The emerging barriers were uncertainty regarding clinical outcomes, cultural and communication difficulties, barriers associated with legal and ethical considerations, infection control restrictions, lack of time, and limited resources and support systems.

Conclusion

The pandemic has provided opportunities for rapid implementation of ACP in creative ways to circumvent social distancing restrictions and high demand for health services. This review suggests the pandemic has provided some impetus to drive adaptable ACP conversations at individual, local, and international levels, affording an opportunity for longer term improvements in ACP practice and patient care. The enablers of ACP and the accelerated adoption evident here will hopefully continue to be part of everyday practice, with or without the pandemic.

Fatigue in nurses and medication administration errors: A scoping review

BACKGROUND

Medication administration errors (MAEs) cause preventable patient harm and cost billions of dollars from already-strained healthcare budgets. An emerging factor contributing to these errors is nurse fatigue. Given medication administration is the most frequent clinical task nurses undertake; it is vital to understand how fatigue impacts MAEs.

OBJECTIVE

Examine the evidence on the effect of fatigue on MAEs and near misses by registered nurses working in hospital settings.

METHOD

Arksey and O'Malley's scoping review framework was used to guide this review and PAGER framework for data extraction and analysis. The PRISMA checklist was completed. Four electronic databases were searched: CINAHL, PubMed, Scopus and PsycINFO. Eligibility criteria included primary peer review papers published in English Language with no date/time limiters applied. The search was completed in August 2021 and focussed on articles that included: (a) registered nurses in hospital settings, (b) MAEs, (c) measures of sleep, hours of work, or fatigue.

RESULTS

Thirty-eight studies were included in the review. 82% of the studies identified fatigue to be a contributing factor in MAEs and near misses (NMs). Fatigue is associated with reduced cognitive performance and lack of attention and vigilance. It is associated with poor nursing performance and decreased patient safety. Components of shift work, such as disruption to the circadian rhythm and overtime work, were identified as contributing factors. However, there was marked heterogeneity in strategies for measuring fatigue within the included studies.

RELEVANCE TO CLINICAL PRACTICE

Fatigue is a multidimensional concept that has the capacity to impact nurses' performance when engaged in medication administration. Nurses are susceptible to fatigue due to work characteristics such as nightwork, overtime and the requirement to perform cognitively demanding tasks. The mixed results found within this review indicate that larger scale studies are needed with particular emphasis on the impact of overtime work. Policy around safe working hours need to be re-evaluated and fatigue management systems put in place to ensure delivery of safe and quality patient care.

Nurses and nursing students as second victims: A scoping review

BACKGROUND

Second victim describes the impact on health care professionals after an error causing preventable patient harm. However, to date, the impact of making errors in practice by nurses and/or nursing students is unclear.

PURPOSE

To describe and understand what is known about nurses and nursing students as second victims.

METHODS

A scoping review was completed using three databases: CINAHL, Medline, and Proquest for the period between 2010 and 2022. A total of 23 papers underwent thematic analysis.

DISCUSSION

Three themes were identified: (a) Psychological distress and symptomatology, (b) Coping-response/reactions to errors, and (c) Seeking support and understanding.

CONCLUSION

Nurses and nursing students' well-being and productivity levels can be negatively affected by inadequate team and organisational support. To improve team functioning, appropriate support mechanisms must be implemented to assist nurses who experience significant distress after making errors. Nursing leadership should prioritise improving support programs, assessing workload allocation, and increasing awareness amongst leaders of the potential benefits of providing support to second victims.

A Scoping Review of Compassion Fatigue Among Oncology Nurses Caring for Adult Patients

BACKGROUND

Oncology nurses have frequent contact with oncology patients during their cancer journey. This long-term, recurrent contact can impact the health and well-being of the nurse through the development of compassion fatigue (CF).

OBJECTIVES

To identify what contributes to CF and what individual, interpersonal, and organizational factors mitigate CF among oncology nurses caring for adult patients.

METHODS

A scoping review framework by Arksey and O'Malley guided this review. Electronic databases were searched for relevant studies. A blinded screening process was undertaken by the authors using the following inclusion criteria: English language published from January 2011 to December 2021, primary research peer-reviewed studies, and focusing on CF within oncology nurses caring for adult patients in any practice setting.

RESULTS

Nineteen studies (21 articles) were identified. The review found nurses' personal beliefs around nursing care being provided, and personality traits of psychological inflexibility, neuroticism, passive coping, and avoidance contributed to CF. Workplace conflict and lack of a healthy work-life balance also contributed to CF. However, nurses' personal resilience, ability to positively reflect upon their work, a supportive team environment, and continuing education were found to mitigate CF.

CONCLUSIONS

Levels of CF vary among oncology nurses caring for adult patients. Oncology nurses may benefit from personal and organizational resources aimed at improving oncology nurses' professional quality of life while decreasing CF.

IMPLICATIONS FOR PRACTICE

Consideration and future research of effective interventions are needed to sustain a future health workforce and mitigate CF among oncology nurses.

Mentoring students in doctoral nursing programs: A scoping review

BACKGROUND

Academic mentorship usually involves an ongoing, supportive relationship between experienced academics and research candidates, and is fundamental to establishing and nurturing scholarship and the skills for dealing with the changing demands of the academic environment. Mentoring is a valuable strategy for the development of students enrolled in doctoral nursing programs (Doctor of Philosophy in Nursing - PhD, Doctor of Nursing Practice - DNP, Doctor of Nursing Science - DNS, and Doctoral Education in Nursing - EdD).

PURPOSE

To report mentorship experiences among doctoral nursing students and academic mentors, identify positive and negative attributes of mentors and the relationship between mentors and students, and assess the benefits and barriers of mentoring.

METHODS

Relevant empirical studies published until September 2021 were identified using PubMed, CINAHL and Scopus electronic databases. Quantitative, qualitative, and mixed method studies published in English language which reported on mentorship among doctoral nursing students were included. Data were synthesized into a scoping review with findings presented as a narrative summary.

RESULTS

The review included 30 articles, mostly from the USA, which reported on the mentoring relationship, experiences, benefits, and barriers of mentoring for the student and the mentor. Students valued mentor attributes such as being a role model, respectful, supportive, inspiring, approachable, accessible, a content expert and a good communicator. Benefits of mentoring included enhanced experience of research endeavours, scholarly writing and scientific publication, networking support, improved student retention, timely completion of the project, and career readiness, as well as developing one's own mentoring skills for future mentoring of others. Despite the identified benefits, there are a number of barriers related to mentoring including access to mentorship support, limited mentoring skills among faculty, and lack of compatibility between students and mentors.

CONCLUSIONS

This review highlighted students' expectations versus their reality of mentoring, which suggested areas for improvement in mentoring doctoral nursing students, in particular the need for mentorship competency, support, and compatibility. Additionally, there is a need for more robust research designs to understand the nature and characteristics of mentorship programs for doctoral nursing students and to assess the expectations and wider experiences of mentors.

Delivering Prognostic News to Older People with Chronic Disease: What Format Preference and Level of Involvement in Decision Making? A Hospital Survey

Shared decision making near end of life is a balancing act of communicating prognosis to patients and their surrogates/families and engaging them in considering value-concordant management choices. This cross-sectional survey aimed to determine the format in which older patients with chronic illnesses would prefer to receive prognostic information on their treatment options and disease progression, and their desired level of engagement in decision making. With a 60% participation rate, 139 inpatients in two hospitals and five surrogates were presented with six hypothetical scenarios with a randomly assigned sequence: verbal and written summary, graph, table, photo, video, and pamphlet. The majority (76%) of respondents chose the traditional verbal communication of prognosis by their doctor with a written summary as a reference and to share with family; the second choice was a condition-specific pamphlet (63%). Many found the graph and photo to be distressing (36% and 42%, respectively). Most (71%) wanted to know everything about their condition trajectory, and 63% chose shared decision making rather than completely autonomous or full delegation to clinicians or family. There were no gender differentials between wanting to know it all, supporting shared decision making or the preferred format for breaking news (p > 0.05). Older hospitalized patients with chronic conditions are willing to discuss end-of-life issues, learn about their prognosis, and be involved in shared decision making. Innovative formats such as graphs, videos, or photos were not welcome as part of the prognostic discussion.

NURSE LEADER AGENCY: CREATING AN ENVIRONMENT CONDUCIVE TO SUPPORT FOR GRADUATE NURSES

Aim

The aim of the study was to gain insight on how nurse leaders manage a culture of safety for graduate nurses.

Background

Current theoretical approaches to safety culture tend towards a checklist approach that focuses on institutional characteristics, failing to examine the quality of interpersonal relationships. These interpersonal interactions are often seen as separate from the institutional realities of resource allocation, nurse–patient ratios, patient acuity or throughput. A theoretical approach is required to illuminate the dialectic between the structure of an organisation and the agency created by nurse leaders to promote patient safety.

Design

Qualitative exploratory descriptive study.

Methods

Semi‐structured interviews were undertaken with 24 nurse leaders from hospital and aged care settings. Thematic analysis and Giddens structuration theory was used to describe the findings.

Results

Nurse leaders identified a range of reciprocal communicative and cultural norms and values, decision‐making processes, personal nursing philosophies, strategies and operational procedures to foster patient safety and mentor graduate nurses. The mentoring of graduate nurses included fostering critical thinking, building and affirming formal structural practices such as handover, teamwork, medication protocols and care plans.

Conclusions

The study provides insight into how nurse leaders foster a culture of safety. Emphasis is placed on how agency in nurse leaders creates an environment conducive to learning and support for graduate nurses.

Implications for Nursing Management

Nurse leadership functions and decision‐making capacity hinges on multiple factors including practicing agency and aspects of the social structure such as the rules for safe communication, and the various institutional protocols. Nurse leaders enforce these forms of engagement and practice through their legitimation as leaders. They have both allocative and authoritative resources; they can command resources, direct staff to attend to patients and/or clinical tasks, mentor, guide, assign, correct and encourage with the authority vested in them by the formal structure of the organisation. In doing so, they sustain the structure and reinforce it.

Graduate nurse views on patient safety: Navigating challenging workplace interactions with senior clinical nurses

AIM AND OBJECTIVE

To explore and understand the negative experiences of graduate nurses' interaction with senior nurses and the implications for safe patient care.

BACKGROUND

Patient safety is dependent on the nursing care they receive. Working in environments where there is reduced collegial support and increased emotional distress, increases the likelihood of nurses making errors that may negatively impact on patient outcomes. Insights drawn from graduate nurses' negative interactions with senior nurses may provide an understanding of the impact of nurse-to-nurse interactions on patient safety outcomes.

METHODS

A qualitative exploratory descriptive design was used. A purposive sample of 18 graduate registered nurses participated in this study. Semi-structured interviews were conducted, audio-recorded and transcribed verbatim. Data were thematically analysed. The COREQ checklist was followed.

RESULTS

The overarching theme, 'Navigating workplace challenges' was identified with two sub-themes: Processing unsupportive nurse behaviour and responding to nurse deviations from best practice. Common deviations in practice included erosion of safe medication practice, wound care and non-compliance with universal precautions. Graduate nurses also observed unsafe workplace practice, however, were hesitant to speak up due to fear of retribution. Unsupportive behaviours impacted on their critical thinking ability, follow-up interactions with other nurses and subsequent delivery of patient care.

CONCLUSION

Quality and safety strategies should not ignore and/or overlook the impact of interpersonal relationships on patient safety and risk. Strategies for delivering evidence-based, safe and quality care to patients go beyond the establishment of standards and technically focussed management strategies.

RELEVANCE TO CLINICAL PRACTICE

It is vital to examine the quality of working relationships between all levels of healthcare professionals including graduate nurses and their supervisors to ensure supportive behaviours prevail in advancing delivery of quality care within the practice environment. The study alludes to the fact that disruptive workplace behaviours are more hierarchical than horizontal (i.e., graduate nurse-to-graduate nurse).

High-dose salvage re-irradiation for recurrent/progressive adult diffuse glioma: healing or hurting?

PURPOSE

To report survival outcomes and identify prognostic factors of salvage re-irradiation (re-RT) in recurrent/progressive glioma.

METHODS

Medical records of patients treated with high-dose re-RT as part of multi-modality salvage therapy for recurrence/progression of adult diffuse glioma from 2010 to 2019 were analyzed retrospectively.

RESULTS

A total of 111 patients developing recurrent/progressive high-grade glioma after adequate upfront treatment at initial diagnosis were included. The first course of radiotherapy (RT) had been delivered to a median dose of 59.4 Gy with an inter-quartile range (IQR) of 54-60 Gy. Median time to recurrence/progression was 4.3 years (IQR = 2.3-7.4 years) while the median time to re-RT was 4.8 years (IQR = 3.6-7.9 years). Re-RT was delivered with intensity-modulated radiation therapy (IMRT) using 1.8 Gy/fraction to a median dose of 54 Gy (IQR = 50.4-55.8 Gy) for a cumulative median equivalent dose in 2-Gy fractions (EQD2) of 104.3 Gy (IQR = 102.6-109.4 Gy). At a median follow-up of 14 months after re-RT, the 1-year Kaplan-Meier estimates of post-re-RT progression-free survival (PFS) and overall survival (OS) were 42.8 and 61.8%, respectively. Univariate analysis identified histological grade at recurrence/progression; histological subtype; disease-free interval (DFI) and time interval between both courses of RT; performance status at re-RT; dose at re-RT and cumulative EQD2; isocitrate dehydrogenase (IDH) mutation; and O⁶-methyl-guanine DNA methyl transferase (MGMT) gene promoter methylation as significant prognostic factors. Preserved performance status, longer DFI, prolonged time interval between both courses of RT, and presence of IDH mutation were associated with significantly improved PFS on multi-variate analysis. However, only performance status retained independent prognostic significance for OS on multi-variate analysis. Post-treatment changes were seen in 33 (30%) patients on follow-up imaging, with higher cumulative dose (EQD2 ≥ 104.3 Gy) being associated with increased risk of post-re-RT pseudo-progression.

CONCLUSION

This clinical audit reports encouraging survival outcomes and identifies key prognostic factors associated with high-dose salvage re-RT in recurrent/progressive glioma.

P14.50 Clinicopathological spectrum of intracranial germ cell tumors: an Indian tertiary cancer center experience

BACKGROUND

Incidence of intracranial germ cell tumors (ICGCT) in Western literature is low (0.3–0.6 %) as compared to East Asia (3–4 %), & their clinicopathological features are well documented. However, there are scant studies on ICGCT from India.

MATERIAL AND METHODS

Retrospective observational study of all ICGCT histologically diagnosed in our hospital from 2007–2018. Metastasis were excluded. Clinicopathological features were retrieved from hospital’s electronic medical records.

RESULTS

We diagnosed 82 primary ICGCT, forming approx. 0.54 % of all primary brain tumors, & 3.5% of pediatric brain tumors. Age range: 2 months-32 yrs (Median age 14 yrs). M:F ratio: 1.82:1 (53M,29F). Nearly 80% patients were pediatric (<18 yrs), & 8 very young (<3 yrs, 7M1F). Majority were suprasellar & pineal (31/82, 37% each), with one bifocal presentation. Other rarer sites: posterior fossa (4), midbrain (1), corpus callosum (1) & 11 non midline (4 thalamic, 4 frontal, 2 cerebellar, 1 CP angle). Predominant histology was germinoma (G) (51/82, 62%), while non germinomatous (NGGCT) were 31/82 (38%), of which 9 were mixed. Pure teratoma were 11 (9 immature (IT), 2 mature), & 5 pure yolk sac tumor (YST). Interestingly, all very young age group patients (<3 yrs), showed only NGGCT histology (5/8 IT, 3/8 pure YST). In contrast, G histology formed nearly 70% of all patients >3 yrs. Females were associated mainly with G (21/29, 72%). NGGCT were predominantly seen in males (M:F=2.9:1). Also, pure IT (9) were seen only in males. Posterior fossa tumors were all IT (4/4). Spinal tumors were NGGCT (1 mature teratoma, 1 YST). Majority of suprasellar tumors (25/31, 80.6%), other midline locations like corpus callosal, midbrain, & all thalamic tumors were G. However, pineal tumors showed equal distribution of G (15/31) & NGGCT (16/31). Spine screening was positive in 8 patients (6 G, 2 IT)- 7 on MRI and 1 only on CSF cytology. Serum tumor markers were raised in 13/54 cases- 6/34G(17.6%), vs 7/20 NGGCT (35%). CSF tumor markers were raised in 14/34-10/23 G (43.4%), vs 4/11 NGGCT (36.3%). Follow up was available for 37 patients (Duration 3 months-10 yrs, median 2 yrs). On f/u 6/15 (40%) NGGCT showed progression/death, while only 2/32 G relapsed (6.5%). Four deaths in G group were not directly attributable to the tumor.

CONCLUSION

Frequency of ICGCT in our hospital similar to western data rather than Asian, albeit with less striking male preponderance. ICGCT were tumors of 2nd decade & majority occurred in pineal/suprasellar areas. About 2/3rd were pure G on histology, and showed good prognosis. NGGCT were common in infants, males and in posterior fossa. IT were seen exclusively in males and pure YST mainly in males. Although majority of ICGCT are in midline, rarely non midline involvement also occurs, and it’s essential to exclude metastasis before considering primary ICGCT. Expectedly, NGGCT showed poorer prognosis, compared to pure germinomas.

Exploring the influence of workplace supports and relationships on safe medication practice: A pilot study of Australian graduate nurses

BACKGROUND

Despite the growing awareness of the benefits of positive workplace climates, unsupportive and disruptive workplace behaviours are widespread in health care organisations. Recent graduate nurses, who are often new to a workplace, are particularly vulnerable in unsupportive climates, and are also recognised to be at higher risk for medication errors.

OBJECTIVES

Investigate the association between workplace supports and relationships and safe medication practice among graduate nurses.

DESIGN AND PARTICIPANTS

Exploratory study using quantitative survey with a convenience sample of 58 nursing graduates in two Australian States.

METHODS

Online survey focused on graduates' self-reported medication errors, safe medication practice and the nature of workplace supports and relationships.

RESULTS

Spearman's correlations identified that unsupportive workplace relationships were inversely related to graduate nurse medication errors and erosion of safe medication practices, while supportive Nurse Unit Manager and supportive work team relationships positively influenced safe medication practice among graduates.

CONCLUSIONS

Workplace supports and relationships are potentially both the cause and solution to graduate nurse medication errors and safe medication practices. The findings develop further understanding about the impact of unsupportive and disruptive behaviours on patient safety and draw attention to the importance of undergraduate and continuing education strategies that promote positive workplace behaviours and graduate resilience.

Thermodynamic geometry, phase transitions, and the Widom line

A microscopic characterization, based on the thermodynamic curvature R, is proposed for first-order liquid-gas phase transitions. Near the critical point, where R is proportional to the correlation volume ξ(3), we propose that R takes the same value in the coexisting phases. This proposal allows a determination of the liquid-gas coexistence curve with no use of the problematic Maxwell equal area construction. Furthermore, |R| ~ ξ(3) allows a direct determination of the Widom line in the supercritical regime. We illustrate with input from the van der Waals model and the National Institute of Standards and Technology Chemistry WebBook.

The Role of Knowledge Management in Innovation

Research on innovation practices reinforces the notion that majority of innovation projects fail systematically due to being managed as raw technology projects. Open forms of innovation where internal and external ideas are leveraged across the organisation are gaining importance over the internal and centralised approach to R&D. India, during the last 15 years, has been spiralling ahead towards ultimate economic success based on its 'knowledge-based talent pool'. Innovation has become a top strategic focus for most Indian companies. Seeing the growing importance of innovation and knowledge management, a need was felt to understand how organisations manage their knowledge capital so as to promote innovation.

This paper aims to provide insights into how an organisation manages knowledge through culture, structure, technology and leadership, so as to promote acquisition and application of knowledge which leads to innovation. The study brings out the importance of tacit knowledge embedded in the firm's culture, structure and leadership as a complement to the explicit knowledge embedded in the firm's technology and documents.

Methylphenidate for gait impairment in Parkinson disease: a randomized clinical trial

BACKGROUND

There is a paucity of therapies for gait impairment in Parkinson disease (PD). Open-label studies have suggested improved gait after treatment with methylphenidate (MPD).

OBJECTIVE

To evaluate the efficacy of MPD for the treatment of gait impairment in PD.

METHODS

Twenty-seven subjects with PD and moderate gait impairment were screened for this 6-month placebo-controlled, double-blind study. Subjects were randomly assigned to MPD (maximum, up to 80 mg/day) or placebo for 12 weeks and crossed over after a 3-week washout. The primary outcome measure was change in a gait composite score (stride length + velocity) between groups at 4 and 12 weeks. Secondary outcome measures included changes in motor function, as measured by the Unified Parkinson's Disease Rating Scale (UPDRS), Freezing of Gait Questionnaire (FOGQ), number of gait-diary freezing episodes, and measures of depression, sleepiness, and quality of life. Three-factor repeated-measures analysis of variance was used to measure changes between groups.

RESULTS

Twenty-three eligible subjects with PD were randomized and 17 completed the trial. There was no change in the gait composite score or treatment or time effect for any of the variables. Treatment effect was not modified by state or study visit. Although there was a trend for reduced frequency of freezing and shuffling per diary, the FOGQ and UPDRS scores worsened in the MPD group compared to placebo. There was a marginal improvement in some measures of depression.

CONCLUSIONS

MPD did not improve gait and tended to worsen measures of motor function, sleepiness, and quality of life.

CLASSIFICATION OF EVIDENCE

This study provides Class III evidence for the lack of benefit of MPD on PD-associated gait impairment.

CLINICAL TRIAL REGISTRATION

NCT00526630.

Effect ofAsparagus racemosus rhizome (Shatavari) on mammary gland and genital organs of pregnant rat

Asparagus racemosus (AR) Willd (family Liliaceae) is commonly known as Shatavari. The alcoholic extract of its rhizome was administered orally to adult pregnant female albino rats at a dose of 30 mg/100 g body weight, daily for 15 days (days 1-15 of gestation). The macroscopic findings revealed a prominence of the mammary glands, a dilated vaginal opening and a transversely situated uterine horn in the treated group of animals. The weight of the uterine horns of the treated group was found to be significantly higher (p < 0.001) but the length was shorter (p > 0.01). Microscopic examination of the treated group showed proliferation in the lumen of the duct of mammary gland. It was obliterated due to hypertrophy of ductal and glandular cells. Hyperplasia of the glandular and muscular tissue and hypertrophy of the glandular cells were observed in the genital organs. The parenchyma of the genital organs showed abundant glycogen granules with dilated blood vessels and thickening of the epithelial lining. The oviduct in the treated group showed hypertrophied muscular wall, whereas the ovary revealed no effect of the drug. The results suggest an oestrogenic effect of Shatavari on the female mammary gland and genital organs.

Neuropilin-2 is required in vivo for selective axon guidance responses to secreted semaphorins

Neuropilins are receptors for class 3 secreted semaphorins, most of which can function as potent repulsive axon guidance cues. We have generated mice with a targeted deletion in the neuropilin-2 (Npn-2) locus. Many Npn-2 mutant mice are viable into adulthood, allowing us to assess the role of Npn-2 in axon guidance events throughout neural development. Npn-2 is required for the organization and fasciculation of several cranial nerves and spinal nerves. In addition, several major fiber tracts in the brains of adult mutant mice are either severely disorganized or missing. Our results show that Npn-2 is a selective receptor for class 3 semaphorins in vivo and that Npn-1 and Npn-2 are required for development of an overlapping but distinct set of CNS and PNS projections.

Computer-integrated revision total hip replacement surgery: concept and preliminary results

This paper describes an ongoing project to develop a computer-integrated system to assist surgeons in revision total hip replacement (RTHR) surgery. In RTHR surgery, a failing orthopedic hip implant, typically cemented, is replaced with a new one by removing the old implant, removing the cement and fitting a new implant into an enlarged canal broached in the femur. RTHR surgery is a difficult procedure fraught with technical challenges and a high incidence of complications. The goals of the computer-based system are the significant reduction of cement removal labor and time, the elimination of cortical wall penetration and femur fracture, the improved positioning and fit of the new implant resulting from precise, high-quality canal milling and the reduction of bone sacrificed to fit the new implant. Our starting points are the ROBODOC system for primary hip replacement surgery and the manual RTHR surgical protocol. We first discuss the main difficulties of computer-integrated RTHR surgery and identify key issues and possible solutions. We then describe possible system architectures and protocols for preoperative planning and intraoperative execution. We present a summary of methods and preliminary results in CT image metal artifact removal, interactive cement cut-volume definition and cement machining, anatomy-based registration using fluoroscopic X-ray images and clinical trials using an extended RTHR version of ROBODOC. We conclude with a summary of lessons learned and a discussion of current and future work.