Risk assessment for aggressive behaviour in schizophrenia

BACKGROUND

Aggressive or violent behaviour is often associated with people with schizophrenia in common perceptions of the disease. Risk assessment methods have been used to identify and evaluate the behaviour of those individuals who are at the greatest risk of perpetrating aggression or violence or characterise the likelihood to commit acts. Although many different interventions have been developed to decrease aggressive or violent incidences in inpatient care, staff working in inpatient settings seek easy-to-use methods to decrease patient aggressive events. However, many of these are time-consuming, and they require intensive training for staff and patient monitoring. It has also been recognised in clinical practice that if staff monitor patients' behaviour in a structured manner, the monitoring itself may result in a reduction of aggressive/violent behaviour and incidents in psychiatric settings.

OBJECTIVES

To assess the effects of structured aggression or violence risk assessment methods for people with schizophrenia or schizophrenia-like illnesses.

SEARCH METHODS

We searched the Cochrane Schizophrenia Group's Study-Based Register of Trials, which is based on CENTRAL, MEDLINE, Embase, CINAHL, PsycINFO, PubMed, ISRCTN registry, ClinicalTrials.gov, and WHO ICTRP, on 10 February 2021. We also inspected references of all identified studies.

SELECTION CRITERIA

We included all randomised controlled trials (RCTs) comparing structured risk assessment methods added to standard professional care with standard professional care for the evaluation of aggressive or violent behaviour among people with schizophrenia.

DATA COLLECTION AND ANALYSIS

At least two review authors independently inspected citations, selected studies, extracted data, and appraised study quality. For binary outcomes, we calculated a standard estimation of the risk ratio (RR) and its 95% confidence interval (CI). For continuous outcomes, we calculated the mean difference (MD) and its 95% CI. We assessed risk of bias in the included studies and created a summary of findings table using the GRADE approach.

MAIN RESULTS

We included four studies in the review. The total number of participants was not identifiable, as some studies provided number of participants included, and some only patient days. The studies compared a package of structured assessment methods with a control group that included routine nursing care and drug therapy or unstructured psychiatric observations/treatment based on clinical judgement. In two studies, information about treatment in control care was not available. One study reported results for our primary outcome, clinically important change in aggressive/violent behaviour, measured by the rate of severe aggression events. There was likely a positive effect favouring structured risk assessment over standard professional care (RR 0.59, 95% CI 0.41 to 0.85; 1 RCT; 1852 participants; corrected for cluster design: RR 0.59, 95% CI 0.37 to 0.93; moderate-certainty evidence). One trial reported data for the use of coercive measures (seclusion room). Compared to standard professional care, structured risk assessment may have little or no effect on use of seclusion room as days (corrected for cluster design: RR 0.92, 95% CI 0.27 to 3.07; N = 20; low-certainty evidence) or use of seclusion room as secluded participants (RR 1.83, 95% CI 0.39 to 8.7; 1 RCT; N = 20; low-certainty evidence). However, seclusion room may be used less frequently in the standard professional care group compared to the structured risk assessment group (incidence) (corrected for cluster design: RR 1.63, 95% CI 0.49 to 5.47; 1 RCT; N = 20; substantial heterogeneity, Chi2 = 0.0; df = 0.0; P = 0.0; I2 = 100%; low-certainty evidence). There was no evidence of a clear effect on adverse events of escape (RR 0.2, 95% CI 0.01 to 4.11; 1 RCT; n = 200; very low-certainty evidence); fall down (RR 0.33, 95% CI 0.04 to 3.15; 1 RCT; n = 200; very low-certainty evidence); or choking (RR 0.2, 95% CI 0.01 to 4.11; 1 RCT; n = 200; very low-certainty evidence) when comparing structured risk assessment to standard professional care. There were no useable data for patient-related outcomes such as global state, acceptance of treatment, satisfaction with treatment, quality of life, service use, or costs.

AUTHORS' CONCLUSIONS

Based on the available evidence, it is not possible to conclude that structured aggression or violence risk assessment methods are effective for people with schizophrenia or schizophrenia-like illnesses. Future work should combine the use of interventions and structured risk assessment methods to prevent aggressive incidents in psychiatric inpatient settings.

Conceptual framework for a comprehensive competence in managing challenging behaviour: The views of trained instructors

WHAT IS KNOWN ON THE SUBJECT?: There is body of knowledge available about the harms associated with restrictive interventions used in behaviour management, service users' perceptions of the use of restraints, and staff competence in behaviour management. The staff perspective has been studied in terms of staff exposure, responses to and prevention of aggression, staff-related factors associated with service user aggression, and staff attitudes and perceptions towards violence. The definitions of competence in behaviour management provided in training interventions are fragmented and based on unilateral measurements. Training interventions with the purpose of enhancing staff competence in behaviour management are organized regularly, yet there is a lack of clarity on how effective these interventions are. Inadequate conceptual understanding of behaviour management can weaken the effectiveness of these interventions. WHAT THIS PAPER ADDS TO EXISTING KNOWLEDGE?: Our study produced new knowledge by providing a preliminary conceptual framework that can be used to comprehensively describe and assess competence in managing challenging behaviour and to cover safely the whole care process. Humane care and ethical sensitivity should be the premises of interaction with people in distress. We also pointed out the needs for conceptual clarification of the concepts of confidence, support and restraint. We provide important new insight into the leadership and cultural issues of behaviour management that is relevant for patients, staff members and healthcare organizations. We found that staff members do not consider service user safety and workplace safety as opposing issues. Further, we provide new perspectives for prevention, the risk assessment process and effective communication in the context of behaviour management. WHAT ARE THE IMPLICATIONS FOR PRACTICE?: A comprehensive understanding of the competences related to behaviour management will foster universal definitions for "support" and "restraint," which can then be used to ensure that the best practices are used for behaviour management. Organizational culture and participative leadership on behaviour management should be developed with a special focus on safety issues, common understanding of comprehensive competence, risk assessment and prevention, views regarding the use of restraints, and teamwork. ABSTRACT: Introduction Previous research concerning staff views of behaviour management has not considered instructors' views. The definitions of competence in behaviour management are fragmented, which can undermine the effectiveness of training interventions. Aim/Question This study aimed to describe Finnish and British Management of Actual or Potential Aggression instructors' perceptions of safety and behaviour management-related competences and create a conceptual framework for comprehensive competence. Method An explorative-descriptive qualitative approach with purposive sampling (N = 22), semi-structured interviews and abductive content analysis. Results Conceptual framework of comprehensive competence in managing challenging behaviour includes five categories-knowledge, skills, attitude, confidence and ethical sensitivity-and 21 subcategories. Competent staff and supportive leadership ensured safety, while inconsistent risk management culture, the health and behaviour of service users, and inadequate staff orientation endangered safety. Discussion The study produced new knowledge of safety issues and competences from the perspective of the instructors who deliver behaviour management training. Implications for practice Competence to manage challenging behaviour should be developed based on our conceptual framework to provide an effective and safe training. Prevention, the risk assessment process, alternative communication, and the definitions of "confidence," "support" and "restraint" should all be sufficiently addressed in future training.

The Core Nursing Interventions in Adult Psychiatric Outpatient Care Identified by Nurses, a Delphi Study

PURPOSE

To define the core nursing interventions identified by nurses in the adult psychiatric outpatient care setting.

METHODS

A two-round Delphi study. The panel consisted of nurses and nurse managers.

FINDINGS

Nurses identified 53 core interventions, 50 of which are described in the Nursing Interventions Classification (NIC). Altogether, two thirds of these interventions were in the NIC domain 'Behavioral' and the emphasis was on NIC classes 'Coping Assistance' and 'Behavior Therapy,' suggesting that nurses define providing psychosocial support as the core in their work.

CONCLUSIONS

The findings indicate that the main role of nurses in the psychiatric outpatient care is to deliver psychosocial care for their patients. The lack of family interventions among the core interventions and the need to add the missing three interventions into the classification need more research in the future.

IMPLICATIONS FOR NURSING PRACTICE

This study helps to define nurses' role in the psychiatric outpatient care. The findings can be used in developing nursing education programs.

Patient safety and staff competence in managing challenging behavior based on feedback from former psychiatric patients

PURPOSE

This study aimed to describe the perceptions and lived experiences of former psychiatric patients of their own and/or co-patients' behavior that nursing staff has regarded as challenging and that has resulted in behavior management.

DESIGN AND METHODS

An explorative-descriptive qualitative design with video vignettes, semistructured interviews, and abductive content analysis.

FINDINGS

Many reasons for different kinds of patient behavior that were considered challenging by staff were identified. Delivering care based on patients' needs was identified as core staff competence.

PRACTICE IMPLICATIONS

Findings can be utilized when pursuing restraint reduction in psychiatric care by enhancing staff competence.

Interventions delivered by nurses in adult outpatient psychiatric care: An integrative review

WHAT IS KNOWN ON THE SUBJECT?: In many countries, the majority of psychiatric care is being delivered in an outpatient setting and the proportion of outpatients is increasing on a global level. Nurses are the largest workforce in psychiatric care, but their role has been said to be difficult to define. According to our knowledge, there are no previous reviews focusing on nurse-delivered interventions in the adult psychiatric outpatient setting. WHAT THIS PAPER ADDS TO EXISTING KNOWLEDGE?: This review summarizes nurse-delivered interventions identified in the research literature and describes these systematically. Analysing all the identified interventions using the Nursing Interventions Classification, we conclude that the emphasis of nurse-delivered interventions in psychiatric outpatient care is on interventions aiming at improving the functioning of both patients and their family members by building on their own strengths. These findings differ from those presented in a review on inpatient psychiatric nursing. There are several clinical trials describing nurse-delivered evidence-based treatments, such as psychoeducation for patients and their family members in the case of patients diagnosed with schizophrenia and bipolar disorder. The quality of randomized controlled trials was higher than in earlier reviews describing psychiatric nursing interventions in general or in connection with a specific patient group. Further clinical trials are needed to describe the role of nurses in the care of patients diagnosed with depression and in the use of web-based interventions. Additionally, it would be important to study what supports, and on the other hand hinders, the role of nurses in delivering evidence-based treatments at the clinical level. WHAT ARE THE IMPLICATIONS FOR PRACTICE?: Nurses can play a central role in responding to the growing demand for evidence-based practices in adult outpatient psychiatry, by delivering treatments for patients and family members. It is important that both nursing education and clinical practices recognize and support this role. Abstract Introduction According to our knowledge, there are no previous reviews on nurse-delivered interventions in the adult psychiatric outpatient setting. Aim To identify and systematically describe and analyse nurse-delivered interventions based on research literature. Method An integrative review. Results This review included 60 studies, of which 46 were intervention studies, including 40 clinical trials. The most common patient groups were patients diagnosed with schizophrenia and bipolar disorder. The nursing interventions described in the studies resembled a total of 68 interventions from the Nursing Interventions Classification. The treatment delivery methods varied and treatments often lacked a clear theoretical background. Implications for practice The core of nurse-delivered interventions identified in research literature in psychiatric outpatient care is on interventions aiming at improving the functioning of both patients and their family members by building on their own strengths. These findings differ from the interventions identified in a review describing nursing in the inpatient setting. There are high-quality clinical trials describing nurse-delivered treatments for patients diagnosed with schizophrenia and bipolar disorder. These include evidence-based treatments such as psychoeducation. Understanding of how these treatments are transferred in clinical practice is missing. Clinical trials describing nurse-delivered web-based interventions and interventions for patients diagnosed with depression are needed.

Nursing interventions in adult psychiatric outpatient care. Making nursing visible using the Nursing Interventions Classification

AIM

To describe and to clarify the work of nurses in psychiatric outpatient care using a standardized nursing terminology and to describe the potential benefits and challenges in the use of the terminology.

DESIGN

A qualitative study of ethnographically grounded fieldwork in four adult outpatient units located in three major cities in Finland.

METHODS

A two-phase ethnographically oriented study, consisting of observations and focus group interviews in four psychiatric outpatient care units (in January-March 2018). During this process, the identified nursing interventions were mapped into the Nursing Interventions Classification.

RESULTS

We identified 93 different nursing interventions, covering all seven domains. Categories describing potential benefits and challenges were as follows: giving words to nurses' work and the challenge of overlapping interventions.

CONCLUSION

Our findings indicate that the Nursing Interventions Classification is a suitable means to describe nursing in the psychiatric outpatient care setting. Our findings support the theory that describing nurses' work using a nursing terminology can make nursing visible and further empower nurses and help them to structure their work. The lack of other professionals, especially physicians, has led to nurses taking over new tasks officially and unofficially and we suggest that the issue needs to be studied further.

IMPACT

Nurses' role in the psychiatric outpatient care has been described as invisible and difficult to describe. Our findings suggest that a nursing terminology can make nursing visible, not only from the perspective of patient health records but is also a way to conceptualize nurses' work.

Craniomaxillofacial osteosarcoma - The role of surgical margins

BACKGROUND

Osteosarcomas (OS) in the craniomaxillofacial (CMF) region are typically diagnosed at later age than long-bone OS, but they are reported to have better 5-year survival. Curative treatment warrants wide surgical resection, which is often not possible in the CMF region. The purpose of this article is to present a nationwide series of CMF in Finland to discuss the role of surgery.

PATIENTS AND METHODS

All 21 CMF OS patients managed in Finland from 1992 to 2009 were included. The mean age was 40 years (range 15-72). Data on patient and tumor characteristics, treatment modalities, and survival were recorded. All patients had a minimum follow-up of 5 years or until death.

RESULTS

OS was evenly represented in the mandible and maxillary bones, which together constituted 76% of all sites. Surgery with curative intent was carried out in 20 patients. Clear margins were achieved in only five cases. Eight (40%) of these 20 patients died due to OS, and their average survival time was 1.3 years. Seven (35%) out of the 20 patients received radiotherapy due to close/intralesional surgical margins, and four of them did not develop recurrences during the follow-up.

CONCLUSIONS

The results suggest that postoperative radiotherapy may alter the prognosis in CMF OS, particularly in cases with close or intralesional margins. This may increase the survival rates achieved by prompt action in performing radical surgery.

Identifying Local and Centralized Mental Health Services-The Development of a New Categorizing Variable

The challenges of mental health and substance abuse services (MHS) require shifting of the balance of resources from institutional care to community care. In order to track progress, an instrument that can describe these attributes of MHS is needed. We created a coding variable in the European Service Mapping Schedule-Revised (ESMS-R) mapping tool using a modified Delphi panel that classified MHS into centralized, local services with gatekeeping and local services without gatekeeping. For feasibility and validity, we tested the variable on a dataset comprising MHS in Southern Finland, covering a population of 2.3 million people. There were differences in the characteristics of services between our study regions. In our data, 41% were classified as centralized, 37% as local without gatekeeping and 22% as local services with gatekeeping. The proportion of resources allocated to local services varied from 20% to 43%. Reclassifying ESMS-R is an easy way to compare the important local vs. centralized balance of MHS systems globally, where such data exists. Further international studies comparing systems and validating this approach are needed.

Impact of moral sensitivity on moral distress among psychiatric nurses

Background:

Moral distress occurs when one knows the right thing to do, but institutional constraints make it nearly impossible to pursue the right course of action. Moral distress was found to cause negative feelings, burnout, and/or resignation. Not only external factors such as lack of staff but also internal ones affect moral distress. Moral sensitivity, which is thought of as an advantage of nurses, could effect moral distress, as nurses being unaware of existing ethical problems must feel little distress.

Objectives:

To examine the impact of moral sensitivity on moral distress among psychiatric nurses, and affirm the hypothesis that nurses with higher moral sensitivity will suffer moral distress more than nurses with less moral sensitivity in two different samples.

Ethical consideration:

The study obtained ethical approval from the Research Ethics Committee of the Faculty of Medicine at Mie University (# 1111, 20.4.2010), and by the Turku University Ethics Board (29.5.2012). Permissions to undertake the study was obtained from the in two hospital districts and in one city (§ 48/4.10.2012, § 63/4.9.2012, 51/2012 27.8.2012). Informed consent was not formally obtained, because the questionnaire was anonymously reported by the participants who volunteered to answer. The participants responded voluntarily and anonymously.

Methods:

An anonymous questionnaire containing the Revised Moral Sensitivity Questionnaire and the Moral Distress Scale for Psychiatric nurses was conducted to 997 nurses in 12 hospitals in Japan, and 974 nurses in 10 hospitals in Finland after obtaining of approval by research ethics committees. Data were analyzed using a multi-group structural equation model analysis.

Findings:

A set of analyses imply that the association of moral sensitivity with moral distress is significant and similar between Japan and Finland, whereas the factor structures of moral sensitivity and moral distress may be partially different.

Discussion:

The result of this study may indicate that nurses with high moral sensitivity can sense and identify moral problems, but not resolve them. Therefore, supporting nurses to solve ethical problems, not benumbing them, can be important for better nursing care and prevention of nurses’ resignation.

Conclusion:

Moral sensitivity and moral distress were positively correlated among psychiatric nurses in both Japan and Finland, although the participating nurses from the two countries were different in qualification, age, and cultural background. Nurses with high moral sensitivity suffer from moral distress.

A quantitative systematic review of the effects of training interventions on enhancing the competence of nursing staff in managing challenging patient behaviour

AIMS

This systematic quantitative review identifies and summarizes the current knowledge and effects of training interventions for managing patients' challenging behaviour.

BACKGROUND

Challenging behaviour is an acknowledged worldwide healthcare problem and its management can have a huge impact on quality of care. Evidence-based training interventions that focus on managing challenging behaviour are needed, but few tools for the systematic evaluation of these interventions are currently offered.

DESIGN

A quantitative systematic review following the 2008 Centre for Reviews and Dissemination guidelines.

DATA SOURCES

CINAHL, Scopus, PsycInfo, PubMed and Cochrane were searched using the same terms for papers published in English from 2005-2015.

REVIEW METHODS

Studies were assessed for quality and risk of bias, according to the Cochrane Effective Practice and Organisation of Care Group criteria. A narrative summary was conducted.

RESULTS

We included 17 studies and evaluated 16 training interventions. Interventions were classified into four key themes: disengagements, communication, controlling behavioural symptoms and restrictive measures. Our review showed that interventions were more likely to decrease violent incident rates and increase staff confidence than change staff attitudes or increase knowledge. The elements of competence used to manage challenging behaviour were measured unilaterally. The evidence provided by studies was largely weak.

CONCLUSION

The variety of measurements used in the studies made comparing the effectiveness of the training interventions difficult. An individual's competence to manage challenging behaviour needs to be defined and a comprehensive scale for evaluating competence is also needed. Patient safety should be included in future evaluations.

Interventions following a high violence risk assessment score: a naturalistic study on a Finnish psychiatric admission ward

BACKGROUND

Patient aggression and violence against staff members and other patients are common concerns in psychiatric units. Many structured clinical risk assessment tools have recently been developed. Despite their superiority to unaided clinical judgments, staff has shown ambivalent views towards them. A constant worry of staff is that the results of risk assessments would not be used. The aims of the present study were to investigate what were the interventions applied by the staff of a psychiatric admission ward after a high risk patient had been identified, how frequently these interventions were used and how effective they were.

METHODS

The data were collected in a naturalistic setting during a 6-month period in a Finnish psychiatric admission ward with a total of 331 patients with a mean age of 42.9 years (SD 17.39) suffering mostly from mood, schizophrenia-related and substance use disorders. The total number of treatment days was 2399. The staff assessed the patients daily with the Dynamic Appraisal of Situational Aggression (DASA), which is a structured violence risk assessment considering the upcoming 24 h. The interventions in order to reduce the risk of violence following a high DASA total score (≥4) were collected from the patients' medical files. Inductive content analysis was used.

RESULTS

There were a total of 64 patients with 217 observations of high DASA total score. In 91.2% of cases, at least one intervention aiming to reduce the violence risk was used. Pro re nata (PRN)-medication, seclusion and focused discussions with a nurse were the most frequently used interventions. Non-coercive and non-pharmacological interventions like daily activities associated significantly with the decrease of perceived risk of violence.

CONCLUSION

In most cases, a high score in violence risk assessment led to interventions aiming to reduce the risk. Unfortunately, the most frequently used methods were psychopharmacological or coercive. It is hoped that the findings will encourage the staff to use their imagination when choosing violence risk reducing intervention techniques.

Family Involvement in Managing Violence of Mental Health Patients

PURPOSE

This study aimed to explore relatives' perceptions of violent episodes and their suggestions on managing violence.

DESIGN AND METHODS

Qualitative design with focus groups including relatives (n = 8) was carried out. Data were analyzed using inductive content analysis.

FINDINGS

The relatives described patient violence in different contexts: at home, in a psychiatric hospital, and after discharge from the psychiatric hospital. They suggested interventions to achieve safer and more humane management of violent episodes.

PRACTICE IMPLICATIONS

Relatives are a valuable source of information in developing strategies to manage patient violence humanely. Their views on developing the quality of psychiatric care merit more attention.

Regional Correlates of Psychiatric Inpatient Treatment

Current reforms of mental health and substance abuse services (MHS) emphasize community-based care and the downsizing of psychiatric hospitals. Reductions in acute and semi-acute hospital beds are achieved through shortened stays or by avoiding hospitalization. Understanding the factors that drive the current inpatient treatment provision is essential. We investigated how the MHS service structure (diversity of services and balance of personnel resources) and indicators of service need (mental health index, education, single household, and alcohol sales) correlated with acute and semi-acute inpatient treatment provision. The European Service Mapping Schedule-Revised (ESMS-R) tool was used to classify the adult MHS structure in southern Finland (population 1.8 million, 18+ years). The diversity of MHS in terms of range of outpatient and day care services or the overall personnel resourcing in inpatient or outpatient services was not associated with the inpatient treatment provision. In the univariate analyses, sold alcohol was associated with the inpatient treatment provision, while in the multivariate modeling, only a general index for mental health needs was associated with greater hospitalization. In the dehospitalization process, direct resource re-allocation and substituting of inpatient treatment with outpatient care per se is likely insufficient, since inpatient treatment is linked to contextual factors in the population and the health care system. Mental health services reforms require both strategic planning of service system as a whole and detailed understanding of effects of societal components.

How size matters: exploring the association between quality of mental health services and catchment area size

BACKGROUND

The diversity of mental health and substance abuse services (MHS) available to service users is seen as an indicator of the quality of the service system. In most countries MHS are provided by a mix of public, private and third sector providers. In Finland, officially, the municipalities are responsible for organizing the services needed, but the real extent and roles of private and third sector service providers are not known. Our previous study showed that the catchment area population size was strongly associated with diversity of mental health services. It is not known whether this was due to some types of services or some provider types being more sensitive to the size effect than others. The aim of this study was to investigate the association between area population size and diversity of mental health services, i.e. which types of services and which service providers' contributions are sensitive to population size.

METHODS

To map and classify services, we used the ESMS-R. The diversity of services was defined as the count of main types of care. Providers were classified as public, private or third sectors.

RESULTS

The diversity of outpatient, residential and voluntary services correlated positively with catchment area population size. The strongest positive correlation between the size of population and services available was found in third sector activities followed by public providers, but no correlation was found for diversity of private services. The third sector and public corporations each provided 44 % of the service units. Third sector providers produced all self-help services and most of the day care services. Third sector and private companies provided a significant part (59 %) of the residential care service units.

CONCLUSIONS

Significant positive correlations were found between size of catchment area population and diversity of residential, outpatient and voluntary services, indicating that these services concentrate on areas with larger population bases. The third sector seems to significantly complement the public sector in providing different services. Thus the third sector be needs to be functionally integrated with other MHS services to achieve a diversified and integrated service system.

Violent events, ward climate and ideas for violence prevention among nurses in psychiatric wards: a focus group study

BACKGROUND

Patient violence against nurses in their work environments is a widespread global concern, particularly in the field of mental health care. A high prevalence of violent events impacts the well-being of nurses and may also impair overall ward climate. However, it has been proposed that nurses' use limited techniques to prevent patient violence, and, therefore, more comprehensive methods for dealing with patient violence are needed. There is still restricted understanding of the ward climate during the occurrence of a violent event as well as how these incidents could be more effectively prevented. This study aimed to explore nurses' experiences of violent events in psychiatric wards, give insight into ward climates and examine suggestions for violence prevention.

METHODS

This study employed a descriptive, exploratory design including focus groups (n = 5) and open-ended questions. The participants were registered and enrolled nurses (n = 22) working on three closed psychiatric in-patient wards in one Finnish hospital district. Focus groups were tape-recorded, transcribed and analyzed with inductive content analysis.

RESULTS

Nurses' experiences of violent events included a variety of warning signs and high-risk situations which helped them to predict forthcoming violence. Patient-instigated violent events were described as complicated situations involving both nurses and patients. When the wards were overloaded with work or emotions, or if nurses had become cynical from dealing with such events, well-being of nurses was impaired and nursing care was complicated. Suggestions for violence prevention were identified, and included, for example, more skilled interaction between nurses and patients and an increase in contact between nurses and patients on the ward.

CONCLUSIONS

This study revealed the complexity of violent events on psychiatric wards as well as the implications of these events on clinical practice development and training, administration and policy. A routine process is needed through which nurses' experiences and ideas concerning prevention of violent events are acknowledged.

Nurses' Time Use in Forensic Psychiatry: Core Interventions Outlined in the Finnish Clinical Practice Guideline on Schizophrenia

Forensic psychiatric nurses are key in implementing the core interventions outlined in the clinical practice guideline on schizophrenia. This study endeavors to ascertain how these were implemented in routine practice in forensic psychiatry by measuring how nurses use their time. Data were collected from registered nurses and practical mental nurses in all forensic psychiatric facilities in Finland using self-report diary forms for 1 week. In total, nurses used 20% of their weekly working hours on core interventions. The differences between the nurse groups were statistically significant (p ≤ 0.05) regarding the following core interventions: (a) care planning with physicians, (b) pharmacotherapy, and (c) basic clinical care. Nurses' qualifications, types of facilities and units, working experience, gender, and staffing levels explained the time used on core interventions. In summary, forensic psychiatric inpatients received insufficient appropriate nursing services according to the relevant guideline regarding schizophrenia. Furthermore, managerial recommendations need to restructure nurses' time use to increase the proportion of productive working hours spent with patients.

Using the Dynamic Appraisal of Situational Aggression with mental health inpatients: a feasibility study

PURPOSE

This paper aims to explore the acceptability of Dynamic Appraisal of Situational Aggression (DASA) from the perspective of patients, its actual use by mental health nurses, and the predictive validity of the DASA instrument.

METHODS

A feasibility study design incorporating quantitative and qualitative components was used. The study was conducted in three mental health inpatient units at three hospitals in southern Finland. Quantitative data were used to explore demand (nurses' actual use of the DASA), limited efficacy (predictive validity), and acceptability (measured through patients' participation in the project). Qualitative data were collected to enhance the understanding of acceptability by describing patients' perceptions of the strengths and weaknesses of the DASA.

RESULTS

Nurses used the DASA for most patient assessments. The predictive validity of the DASA was outstanding or excellent, depending on the type of aggression predicted, although the patient recruitment ratio was low. Patients reported both strengths and weaknesses of the DASA, providing complementary information regarding the instrument's acceptability and clinical application.

CONCLUSION

The DASA accurately predicts inpatient aggression. The patients' preferences and concerns regarding risk assessment have been noted. More patient involvement in risk assessment research and violence prevention efforts is required.

eLearning course may shorten the duration of mechanical restraint among psychiatric inpatients: a cluster-randomized trial

BACKGROUND

The management of psychiatric inpatients exhibiting severely disturbed and aggressive behaviour is an important educational topic. Well structured, IT-based educational programmes (eLearning) often ensure quality and may make training more affordable and accessible.

AIMS

The aim of this study was to explore the impact of an eLearning course for personnel on the rates and duration of seclusion and mechanical restraint among psychiatric inpatients.

METHODS

In a cluster-randomized intervention trial, the nursing personnel on 10 wards were randomly assigned to eLearning (intervention) or training-as-usual (control) groups. The eLearning course comprised six modules with specific topics (legal and ethical issues, behaviour-related factors, therapeutic relationship and self-awareness, teamwork and integrating knowledge with practice) and specific learning methods. The rates (incidents per 1000 occupied bed days) and durations of the coercion incidents were examined before and after the course.

RESULTS

A total of 1283 coercion incidents (1143 seclusions [89%] and 140 incidents involving the use of mechanical restraints [11%]) were recorded on the study wards during the data collection period. On the intervention wards, there were no statistically significant changes in the rates of seclusion and mechanical restraint. However, the duration of incidents involving mechanical restraints shortened from 36.0 to 4.0 h (median) (P < 0.001). No statistically significant changes occurred on the control wards.

CONCLUSIONS

After our eLearning course, the duration of incidents involving the use of mechanical restraints decreased. However, more studies are needed to ensure that the content of the course focuses on the most important factors associated with the seclusion-related elements. The eLearning course deserves further development and further studies. The duration of coercion incidents merits attention in future research.

Toward a safer working environment on psychiatric wards: service users' delayed perspectives of aggression and violence-related situations and development ideas

PURPOSE

To explore service users' (n = 9) delayed perceptions of and suggestions for improvement of management of aggression/violence in psychiatry.

DESIGN AND METHOD

Focus group interviews, inductive content analysis.

FINDINGS

Participants reported aggression/violence-related negative perceptions (including loneliness, boredom, excessive control, and fear) but also memories of humane and caring personnel. The suggestions included meaningful activities and humane, interactive nursing.

PRACTICE IMPLICATIONS

Delayed perceptions and proposals resembled the proximate ones. Perceptions may persist for years. Such perceptions and proposals, if taken into account from the beginning of treatment, may prevent negative long-term consequences of witnessed or experienced aggression/violence. Humane, interactive nursing models should be studied and disseminated.

Knowledge transfer from an e-learning course to clinical practice

BACKGROUND

Continuing education is essential in improving practical psychiatric nursing skills. However, little is known about how knowledge gained in continuing education is transferred to nurses' daily work.

OBJECTIVES

To describe the transfer of knowledge gained from an e-learning course to daily practice.

DESIGN

Qualitative study design.

SETTINGS

One hospital district in Southern Finland with three specialized psychiatric wards (acute, rehabilitation, geriatric wards).

PARTICIPANTS

Nursing staff (N=53) were recruited and 35 participated voluntarily in the e-learning continuing education course in spring 2009.

METHODS

The data comprised nurses' reflective writing during the e-learning course and course evaluation forms completed after the course. We used qualitative design with inductive content analysis to analyze nurses' writings.

RESULTS

The nurses were willing and able to transfer what they learned to their daily practice including the course themes, communication and co-operation among staff members, understanding of preventive and alternative treatment methods and critical thinking regarding one's own work. After the e-learning course the nurses were able to identify development areas such as issues related to staff members' daily work, the patient's role on the ward, alternative methods to avoid coercion, issues pertaining to the care environment on the ward, psychiatric nurses' education, and making an action plan for aggressive situations. All nurses would recommend the course to other nurses.

CONCLUSIONS

New knowledge is easily adopted and transferred to daily practice.

Psychiatric staff on the wards does not share attitudes on aggression

Background

The concept of ward culture has been proposed as a reason for the often reported differences in treatment decisions when managing inpatient aggression. We therefore studied whether staff on wards actually shares similar perceptions and attitudes about aggression and whether the specialty of the ward on which the staff members work influences these opinions.

Methods

The Attitudes Towards Aggression Scale was used to assess attitudes towards aggression in 31 closed psychiatric wards. Altogether 487 staff members working on the study wards were asked to fill in the scale. Respondent’s gender, age, educational level, working experience on the current ward, and specialty of this ward (acute, forensic, rehabilitation) served as background variables.

Results

Most of the variance found was due to differences between individuals. Belonging to the personnel of a particular ward did not explain much of the variance.

Conclusions

Psychiatric staff on the wards does not share attitudes on aggression. As each staff member has his/her own opinion about aggression, training for dealing with aggression or violent incidents should be done, at least partly, on an individual level. We also suggest caution in using the concept of ward culture as an explanation for the use of restrictive measures on psychiatric wards.

Influence of patient characteristics on duration of seclusion/restrain in acute psychiatric settings in Japan

AIM

The aim of this study was to investigate the current state of duration of seclusion/restraint in acute psychiatric settings in Japan and the effect of patient characteristics on duration of seclusion/restraint.

METHODS

During an 8-month period starting from November 2008, duration of seclusion/restraint and patient characteristics were investigated in 694 psychiatric inpatients who experienced seclusion/restraint in three emergency and three acute wards at four psychiatric hospitals. Reasons for starting seclusion/restraint were also assessed. Analysis was performed using generalized linear models, with the duration of seclusion/restraint as the dependent variable and patient characteristics and reasons for starting seclusion/restraint as independent variables.

RESULTS

Of the patients secluded/restrained, 58.6% had a primary diagnosis of schizophrenia (F20-F29) and a large proportion (37.9%) were secluded/restrained due to hurting others. Median hours ofseclusion/restraint were 204 and 82 h, respectively. The duration of seclusion was longer for patients with F20-F29 than those with disorders due to psychoactive substance use (F10-F19) or other diagnoses (F40-F99), and when the reason was danger of hurting others. In contrast, the duration of restraint in female patients and in patients with F10-F19 diagnosis was shorter.

CONCLUSION

The duration of seclusion/restraint at acute psychiatric care wards in Japan are much longer than those reported by previous overseas studies. Although Japanese structure issues such as more patients per ward and a lower ratio of nurses need to be considered, skills for dealing with patients with primary diagnosis of F20-F29 secluded due to danger posed to others should be improved.

Impact of eLearning course on nurses' professional competence in seclusion and restraint practices: 9-month follow-up results of a randomized controlled study (ISRCTN32869544)

eLearning may facilitate continuing vocational education, but data on the long-term effects of an eLearning course are lacking. The aim of this study was to explore the long-term impact of an eLearning course entitled ePsychNurse.Net on psychiatric nurses' professional competence in practicing seclusion and restraint and on their job satisfaction and general self-efficacy at 9-month follow-up. In a randomized controlled study, 12 wards were randomly assigned to the ePsychNurse.Net (intervention) or training as usual (control). Baseline and 9-month follow-up data on nurses' knowledge of coercion-related legislation, physical restraint and seclusion, their attitudes towards physical restraint and seclusion, job satisfaction and general self-efficacy were analysed for 137 completers (those who participated in the 9-month follow-up assessment). No between-group differences were found on any variable, with the exception of a change in attitude to seclusion in favour of the control group. The findings of the long-term effects did not differ from the immediate outcomes (3-month follow-up) and the improved level of knowledge acquired and further consolidation of that knowledge did not take place in the 6-month period after the 3-month ePsychNurse.Net course. The ePsychNurse.Net should be further developed and its future modifications will require additional studies, probably with some new outcome measures.

Occupational stress and implementation of information technology among nurses working on acute psychiatric wards

PURPOSE

The study describes nurses' occupational stress and implementation of information technology on acute psychiatric wards.

DESIGN AND METHODS

The sample consisted of 146 Finnish nurses. The data were collected using a structured questionnaire in 2006.

FINDINGS

Eleven percent of the nurses felt that work was very mentally strenuous and 45% felt that it was rather mentally strenuous. Male nurses reported more stress and dissatisfaction than female nurses. Nurses with very positive attitudes towards Internet use reported less stress and more job satisfaction than nurses with neutral attitudes towards Internet use.

PRACTICE IMPLICATIONS

By supporting positive attitudes to information technology in nurses' daily work, we may increase their job satisfaction and thereby reduce their stress experiences.

Anti-tumor necrosis factor treatment in cherubism--clinical, radiological and histological findings in two children

Cherubism is a rare and disfiguring genetic disorder with excessive bone resorption and multilocular lesions in the mandible and/or maxilla. The disease-causing gain-of-function mutations in the SH3-binding protein 2 (SH3BP2) gene result in increased myeloid cell responses to macrophage colony stimulating factor and RANK ligand, formation of hyperactive osteoclasts (giant cells), and hyper-reactive macrophages that produce excessive amounts of the inflammatory cytokine tumor necrosis factor α (TNF-α). Recent findings in the cherubism mouse model suggest that TNF-α plays a major role in disease pathogenesis and that removal of TNF-α prevents development of the bone phenotype. We treated two children with cherubism with the TNF-α antagonist adalimumab for approximately 2.5 years and collected extensive clinical, radiological and histological follow-up data during the treatment. Histologically the treatment resulted in a significant reduction in the number of multinucleated giant cells and TNF-α staining positivity in both patients. As evaluated by computed tomography and magnetic resonance imaging, the lesions in Patient 1 showed either moderate enlargement (mandibular symphysis) or remained stable (mandibular rami and body, the maxilla). In Patient 2, the lesions in mandibular symphysis showed enlargement during the first 8 months of treatment, and thereafter the lesions remained unchanged. Bone formation and resorption markers remained unaffected. The treatment was well tolerated. Based on our findings, TNF-α antagonist may decrease the formation of pathogenic giant cells, but does not result in lesion regression or prevent lesion expansion in active cherubism. TNF-α modulator treatment thus does not appear to provide sufficient amelioration for patients suffering from cherubism.

Factors affecting assessment of severity of aggressive incidents: using the Staff Observation Aggression Scale - Revised (SOAS-R) in Japan

The aim of this study is to investigate factors associated with overall judgements of aggression severity as provided by ward nurses, using the Japanese-language version of the Staff Observation Aggression Scale - Revised (SOAS-R). Nurses who observed 326 aggressive incidents involving psychiatric inpatients at five mental health facilities in Japan provided their assessments of the incident severity both on the established rating scale, the SOAS-R, and on a visual analogue scale (VAS), a one-item scale to indicate overall aggression severity. To evaluate the factors influencing the VAS severity scores, a multiple regression analysis was performed, in which consumer, nurse and ward characteristics were added consecutively, along with SOAS-R severity scores as independent variables. SOAS-R scores explained 17.6% of the VAS severity scores. Independently from the SOAS-R scores, the gender and age of the aggressive consumers (adjusted R(2) = 10.0%), as well as the gender of the nurses who reported the aggression (adjusted R(2) = 4.1%), each explained VAS severity score to a significant degree. Apart from the SOAS-R scores, consumer and nurse characteristics appeared to influence the overall judgements of severity of aggressive incidents, which may be connected to decisions about the use of coercive measures, such as seclusion/restraint or forced medication.

Seclusion and restraint in psychiatry: patients' experiences and practical suggestions on how to improve practices and use alternatives

PURPOSE

This study explored psychiatric inpatients' experiences of, and their suggestions for, improvement of seclusion/restraint, and alternatives to their use in Finland.

METHODS

The data were collected by focused interviews (n= 30) and were analyzed with inductive content analysis.

RESULTS

Patients' perspectives received insufficient attention during seclusion/restraint processes. Improvements (e.g., humane treatment) and alternatives (e.g., empathetic patient-staff interaction) to seclusion/restraint, as suggested by the patients, focused on essential parts of nursing practice but have not been largely adopted.

PRACTICE IMPLICATIONS

Patients' basic needs have to be met, and patient-staff interaction has to also continue during seclusion/restraint. Providing patients with meaningful activities, planning beforehand, documenting the patients' wishes, and making patient-staff agreements reduce the need for restrictions and offer alternatives for seclusion/restraint. Service users must be involved in all practical development.

Adoption of an Internet-based patient education programme in psychiatric hospitals

Internet-based patient support systems are widely assumed to predict a future trend in patient education. Coherent information is still lacking on how patient education is adopted in psychiatric hospitals and how information technology is used in it. Our aim was to describe nurses' adoption of an Internet-based patient education programme and the variables explaining it. The study was based on Rogers' model of the diffusion of innovation. The Internet-based patient education sessions were carried out by nurses on nine acute psychiatric inpatient wards in two Finnish hospitals. They were evaluated with reports and analysed statistically. Out of 100 nurses, 83 adopted the programme during the study period. The nurses fell into Rogers' groups, late majority (72%), laggards (17%), early majority (7%), early adopters (3%) and innovators (1%). Three groups were formed according to their activity: laggards, late majority, adopters (including early majority, early adopters, innovators). There was a statistical difference between the nurses' programme adoption between the two hospitals (P= 0.045): more laggards (65% vs. 35%) and adopters (73% vs. 27%) in the same hospital. The findings help to provide insight into the contexts and settings when adopting information technology programmes in the area of mental health care.

Impact of eLearning course on nurses' professional competence in seclusion and restraint practices: a randomized controlled study (ISRCTN32869544)

Education on the care of aggressive and disturbed patients is fragmentary. eLearning could ensure the quality of such education, but data on its impact on professional competence in psychiatry are lacking. The aim of this study was to explore the impact of ePsychNurse.Net, an eLearning course, on psychiatric nurses' professional competence in seclusion and restraint and on their job satisfaction and general self-efficacy. In a randomized controlled study, 12 wards were randomly assigned to ePsychNurse.Net (intervention) or education as usual (control). Baseline and 3-month follow-up data on nurses' knowledge of coercion-related legislation, physical restraint and seclusion, their attitudes towards physical restraint and seclusion, job satisfaction and general self-efficacy were analysed for 158 completers. Knowledge (primary outcome) of coercion-related legislation improved in the intervention group, while knowledge of physical restraint improved and knowledge of seclusion remained unchanged in both groups. General self-efficacy improved in the intervention group also attitude to seclusion in the control group. In between-group comparison, attitudes to seclusion (one of secondary outcomes) favoured the control group. Although the ePsychNurse.Net demonstrated only slight advantages over conventional learning, it may be worth further development with, e.g. flexible time schedule and individualized content.

Patient restrictions: are there ethical alternatives to seclusion and restraint?

The use of patient restrictions (e.g. involuntary admission, seclusion, restraint) is a complex ethical dilemma in psychiatric care. The present study explored nurses' (n = 22) and physicians' (n = 5) perceptions of what actually happens when an aggressive behaviour episode occurs on the ward and what alternatives to seclusion and restraint are actually in use as normal standard practice in acute psychiatric care. The data were collected by focus group interviews and analysed by inductive content analysis. The participants believed that the decision-making process for managing patients' aggressive behaviour contains some in-built ethical dilemmas. They thought that patients' subjective perspective received little attention. Nevertheless, the staff proposed and appeared to use a number of alternatives to minimize or replace the use of seclusion and restraint. Medical and nursing staff need to be encouraged and taught to: (1) tune in more deeply to reasons for patients' aggressive behaviour; and (2) use alternatives to seclusion and restraint in order to humanize patient care to a greater extent.

Nurses' and physicians' educational needs in seclusion and restraint practices

PURPOSE

This study aimed to explore nurses' (N= 22) and physicians' (N= 5) educational needs in the context of their perceived seclusion and restraint-related mode of action and need for support.

METHOD

The data were collected by focus group (N= 4) interviews and analyzed with inductive content analysis.

RESULTS

Participants recognized a need for on-ward and problem-based education and infrastructural and managerial support. The declared high ethical principles were not in accordance with the participants' reliance on manpower and the high seclusion and restraint rates.

PRACTICE IMPLICATIONS

Future educational programs should bring together written clinical guidelines, education on ethical and legal issues, and the staff's support aspect.

Novel maxillary reconstruction with ectopic bone formation by GMP adipose stem cells

Microvascular reconstruction is the state-of-the-art in many fields of defect surgery today. Currently, reconstruction of large bony defects involves harvesting of autologous bone causing donor site morbidity and risk of infection. Specifically, utilizing autologous adipose stem cells (autoASCs), large quantities of cells can be retrieved for cell therapy applications and the risk of tissue rejection is diminished. The authors describe the first case report of a microvascular custom-made ectopic bone flap employing good manufacturing practice (GMP) level ASCs. The patient underwent a hemimaxillectomy due to a large keratocyst. After 36 months of follow-up, the defect was reconstructed with a microvascular flap using autoASCs, beta-tricalcium phosphate and bone morphogenetic protein-2. ASCs were isolated and expanded in clean room facilities according to GMP standards and were characterized in vitro. After 8 months of follow-up, the flap had developed mature bone structures and vasculature and was transplanted into the defect area. Postoperative healing has been uneventful, and further rehabilitation with dental implants has been started. The in vitro characterization demonstrated multipotentiality and mesenchymal stem cell characteristics in ASCs. This is the first clinical case where ectopic bone was produced using autoASCs in microvascular reconstruction surgery and it will pave way for new clinical trials in the field.

The MDM2 promoter polymorphism SNP309T-->G and the risk of uterine leiomyosarcoma, colorectal cancer, and squamous cell carcinoma of the head and neck

BACKGROUND

MDM2 acts as a principal regulator of the tumour suppressor p53 by targeting its destruction through the ubiquitin pathway. A polymorphism in the MDM2 promoter (SNP309) was recently identified. SNP309 was shown to result, via Sp1, in higher levels of MDM2 RNA and protein, and subsequent attenuation of the p53 pathway. Furthermore, SNP309 was proposed to be associated with accelerated soft tissue sarcoma formation in both hereditary (Li-Fraumeni) and sporadic cases in humans.

METHODS

We evaluated the possible contribution of SNP309 to three tumour types known to be linked with the MDM2/p53 pathway, using genomic sequencing or restriction fragment length polymorphism as screening methods. Three separate Finnish tumour materials (population based sets of 68 patients with early onset uterine leiomyosarcomas and 1042 patients with colorectal cancer, and a series of 162 patients with squamous cell carcinoma of the head and neck) and a set of 185 healthy Finnish controls were analysed for SNP309.

RESULTS

Frequencies of SNP309 were similar in all four cohorts. In the colorectal cancer series, SNP309 was somewhat more frequent in women and in patients with microsatellite stable tumours. Female SNP309 carriers were diagnosed with colorectal cancer approximately 2.7 years earlier than those carrying the wild type gene. However, no statistically significant association of SNP309 with patients' age at disease onset or to any other clinicopathological parameter was found in these three tumour materials.

CONCLUSION

SNP309 had no significant contribution to tumour formation in our materials. Possible associations of SNP309 with microsatellite stable colorectal cancer and with earlier disease onset in female carriers need to be examined in subsequent studies.

Biodegradable polydioxanone and poly(l/d)lactide implants: an experimental study on peri-implant tissue response

Several implants for orbital wall fracture treatment are available at the present, but they have drawbacks: resorption, risk for migration and foreign body reaction. Alloplastic resorbable implants would be advantageous: no removal operation and no donor side morbidity. The purpose of this study was to evaluate the foreign body reaction, capsule formation and mechanical properties of two bioresorbable implants. PDS and SR-P(L/DL)LA mesh sheet (70/30) with solid frame (96/4) implants (SR-P(L/DL)LA 70,96) were placed into subcutaneous tissue of 24 rats. Immunohistochemistry was used to evaluate reactivity for Tn-C, alpha-actin, type I and III collagens and two mononuclear cells: T-cells and monocyte/ macrophage. GPC, DSC and SEM were performed. Student's t-test or nonparametric Kruskall-Wallis test were used for statistical analysis. Histology of peri-implant capsule exhibited an inner cell-rich zone and an outer connective tissue zone around both materials. Tn-C reactivity was high in the inner and alpha-actin in the outer zone. At the end of the study, the difference of type I collagen versus type III collagen reactivity in inner zone was statistically significant (P<0.0001) as was the difference of type I collagen versus type III collagen reactivity in outer zone (P<0.0001). Immunohistochemistry did not reveal any statistical differences of T-cell and monocyte/macrophage reactivity around PDS versus SR-P(L/DL)LA 70,96 implants, nor any differences as a function of time. PDS were deformed totally after 2 months. SR-P(L/DL)LA 70,96 implants were only slightly deformed during the follow up of 7 months. PDS degraded rapidly in SEM observation. Particles were detaching from surface. SEM observation revealed that polylactide implant was degrading from the surface and the inner porous core became visible. The degradation came visible at 7 months. There were cracks in perpendicular direction towards to the long axis of the filaments. M(w) of PDS decreased fast compared to the polylactide implant. Foreign body reaction was minimal to both materials but continued throughout the whole observation period. Mechanically PDS was poor, it looses its shape totally within 2 months. It cannot be recommended for orbital wall reconstruction. New mesh sheet-frame structure (SR-P(L/DL)LA 70,96) approved to be mechanically adequate for orbital wall reconstruction. It seems not to possess intrinsic memory and retains its shape. The resorption time is significantly longer compared to PDS and is comparable to other studied P(L/DL)LA copolymers. Thus, the new polylactide copolymer implant may support the orbital contents long enough to give way to bone growth over the wall defect.

Are there any complications with bioabsorbable fixation devices? A 10 year review in orthognathic surgery

Bioabsorbable fixation devices have been used in our departments between November 1991 and November 2001 in orthognathic surgery. The aim of this retrospective study was to assess all complications experienced during this time period, when we have operated 163 patients who have undergone 329 orthognathic osteotomies fixated with bioresorbable devices. No postoperative intermaxillary fixation was used. Light guiding elastics were used for 5 to 7 weeks. Patients' acceptance was generally excellent and very few complications occurred during this follow-up of 10 years. The complications were minor and did not affect the end results of the operations. Minor complications occurred in 14 patients (8.6%). Only one patient (0.6%) had a postoperative infection with elevated infection parameters. The other minor complications consisted mainly of dehiscence of the wound and plate exposure together with granulation tissue in the operation field. The rest of the complications occurred in the beginning of our study, when large screw heads on top of the bone irritated the patient and had to be removed. Insufficient fixation resulted in open bite in three patients (1.8%) in the beginning of the trial use of new devices, which no longer are used. Based on our experience, bioresorbable devices are safe to be used in orthognathic procedures. However, there is a learning curve, as there is with all new methods introduced.

Orbital floor reconstruction with poly-L/D-lactide implants: clinical, radiological and immunohistochemical study in sheep

In this study the reconstruction capacity of orbital wall in sheep was evaluated when poly-L/D-lactide (PLDLA96) implants were used for large blow-out defects in 18 sheep. The contralateral side, where the defects healed spontaneously, served as controls. The follow-up was 12, 16, 22 and 36 weeks. Healing was evaluated clinically, radiologically, histologically and immunohistochemically. Physiochemical properties of the implants were also studied. At first, the implants were surrounded by elastic capsules, which gradually ossified. At 36 weeks, 60% were still visible and deformed but surrounded by bone. Light microscopy revealed a low grade inflammatory reaction. Expression of Tn-c and cFn was intense throughout the study. Shear strength decreased gradually and was not measurable after 16 weeks. Crystallinity increased steadily from 1.5 to 29.30% and molecular weight decreased from 49,000 to 4186. In CT, the final bony defect was smaller in the reconstructed sides than in the controls. Based on this study it can be concluded that PLDLA96 implant provokes a local inflammation, which does not prevent bone healing. The deformation of the implant, however, indicates that this PLDLA96 plate is not suitable for orbital floor reconstruction.

Effectiveness of operative treatment of internal orbital wall fracture with polydioxanone implant

Many implants, some made from teflon or silicone, have been used for internal orbital wall reconstruction. Late complications relating to use of such implants have been reported. In this prospective study a polydioxanone (PDS) implant absorbable in vivo was used for internal orbital wall reconstruction. Follow-up involved clinical examination, magnetic resonance imaging (MRI) and computerized tomography (CT). Clinical examinations were undertaken before operation and up to 36 weeks postoperatively. Sixteen consecutive patients (10 pure blow-out fractures, six with associated zygomatic fracture) took part in the study. Prevalences of diplopia, proptosis and enophthalmus were recorded during each follow-up examination. This study revealed no muscle entrapment within the fracture line. Although CT results confirmed bone growth in the internal orbital wall, shape was unsatisfactory, and orbital volume was not reduced. MRI revealed thick scar formations in six cases (37.5%), fibrotic sinuses filled with air or gas in three cases (19%) and a fibrotic sinus with fluid around the PDS in one case (6%). Our results suggest that use of PDS in reconstructing the internal orbital wall is inadvisable.