Tissue and corneal donation and transplantation in the UK

A Web Application for Reporting Eye Donors: Idea, Development and Doctor's Opinion

BACKGROUND

Obtaining corneas in a country of 38 million, Poland, is extremely inefficient. In Poland, about 1000 corneas are transplanted annually, of which over 500 come from multi-organ donations. To our knowledge, such a low percentage of donations is in the absence of reporting of potential corneal donors. There is no computer system in our country for tissue donor reporting. The aim of the work is to present an innovative application developed for this purpose.

MATERIAL AND METHODS

It was a cross-sectional, observational study. The questionnaires were collected from doctors who had access to the app.

RESULTS

Almost all participants (47/52) answered that they would use this app if it was available in the hospital, 46 acknowledged that the application could encourage doctors to report tissue donors, and 48 confirmed it should be integrated with the IT system of hospitals and should be available in all of them.

CONCLUSION

Despite advances in medicine and technology and increased awareness of organ donation and transplantation, the gap between supply and demand is constantly growing. Due to the large number of patients awaiting corneal transplants in Poland, it is necessary to introduce changes aimed at improving this situation. The newly developed app may contribute to increasing donor reporting.

Eye donation from palliative and hospice care contexts: the EDiPPPP mixed-methods study

Background

Over 2 million people in the United Kingdom are living with sight loss with costs to the United Kingdom economy reported as £4.34 billion annually. Conditions that lead to sight loss and impaired vision can be treated if eye tissue is available for corneal transplantation, reconstructive surgery and research into eye diseases. Supply of eye tissue (only available via eye donation) is currently insufficient to meet demand; therefore, new routes are needed. Hospice and hospital-based Palliative Care Services have been reported as potential donation sources of this tissue.

Objectives

To: (1) scope the size and clinical characteristics of the potential eye donation population from research sites; (2) map the donation climate of each research site; (3) identify factors that enable or challenge service providers to consider the option of eye donation from a local and national perspective; (4) identify service users' views regarding the option of eye donation and the propriety of discussing eye donation; and (5) develop and pilot an empirically based intervention designed to change behaviours in relation to eye donation.

Design

A 36-month mixed-methods, multicentre study undertaking three work packages.

Settings

Three hospice care and three hospital-based palliative care services situated in the North, Midlands and the South of England (one service of each type per region).

Participants

Work package 1 - 105 service providers. Work package 2 - 62 service users, and 156 service providers in the national survey. Work package 3 - 21 expert consultees (patient and public involvement, cross discipline).

Data sources

Scoping review, retrospective note review, qualitative interviews/focus groups, participant observation, secondary analysis of primary data, national survey, transparent expert consultation.

Results

Potential: The retrospective notes review demonstrated that of 1199 deceased patients' notes, 553 (46%) patients met the criteria for eye donation (56%, n = 337 in hospice care service settings and 36%, n = 216 in hospital palliative care service). Practice: Less than 4% of all cases agreed as eligible for donation had been approached or referred for eye donation. Eye donation is not currently an embedded practice at local and national levels. Perceptions: Service providers were motivated to discuss eye donation but lacked opportunity and capability. Service users were willing and able to hold conversations about eye donation but were not aware of the option and had not had the option discussed with them. Preferences: Service users wanted to be offered the option of eye donation, and service providers wanted bespoke education and training related to eye donation. Evaluation of the developed intervention STEPS - Support Toolkit for Eye donation in Palliative care Settings will follow implementation of the full intervention (expected to begin in October 2022).

Limitations

Due to the significant impact of the COVID-19 pandemic on clinical sites, partner organisations and national service providers, only two elements of the developed intervention have been pilot tested for proof of concept and the response rate to the national survey was low (8%).

Conclusions

Significant potential exists for eye donation from hospice care and hospital palliative care services; however, individual and organisational behaviour as well as information system-based changes are needed to maximise this potential.

Future work

Evaluation of the STEPS - Support Toolkit for Eye donation in Palliative care Settings; Research exploring the wider public knowledge and views regarding eye donation; research exploring the use of language by National Health Service Blood and Transplant-Tissue and Eye Services in their public-facing infographics, communications and campaigns (specifically the use of the term eye donation).

Trial registration

This trial is registered as ISRCTN14243635: Eye donation from palliative care and hospice care settings.

Funding details

This project was funded by the National Institute for Health and Care Research (NIHR) Health and Social Care Delivery Research programme (17/49/42) and will be published in full in Health and Social Care Delivery Research; Vol. 11, No. 20. See the NIHR Journals Library website for further project information.

The potential for eye donation from hospice and palliative care clinical settings in England: a retrospective case note review of deceased patients' records

There is a need to identify additional routes of supply for ophthalmic tissue in the UK. This paper reports the findings from a national study exploring the potential for eye donation (ED) from three Hospice Care (HC) and three Hospital Palliative Care Services (HPC) in England. The objectives addressed in this paper are i.) to establish the size and describe the clinical characteristics of the potential eye donor population across six clinical sites; ii.) to identify challenges for clinicians in applying the standard ED criteria for assessing patient eligibility. Retrospective assessment of 1199 deceased patient case notes, 601 Hospice Care and 598 Hospital Palliative Care services, against current eye donation criteria. Clinicians' assessments were then evaluated against the same criteria. by specialists based at the National Health Service Blood and Transplant Tissue Services division (NHSBT-TS). Results of the assessment and evaluation are reported as descriptive statistics (numerical data). Free-text comment boxes facilitated clarification and/or justification of review and evaluation decisions. 46% (n = 553) of 1199 deceased patients' notes were agreed as eligible for eye donation (Hospice care settings = 56% (n = 337); Palliative care settings = 36% (n = 216). For all eligible cases (n = 553) the option of ED was recorded as being raised with family members in only 14 cases (3%). Significant potential exists for eye donation from the clinical sites in this study. This potential is not currently being realised.

Classic and Current Opinions in Human Organ and Tissue Transplantation

Graft tolerance is a pathophysiological condition heavily reliant on the dynamic interaction of the innate and adaptive immune systems. Genetic polymorphism determines immune responses to tissue/organ transplantation, and intricate humoral and cell-mediated mechanisms control these responses. In transplantation, the clinician's goal is to achieve a delicate equilibrium between the allogeneic immune response, undesired effects of the immunosuppressive drugs, and the existing morbidities that are potentially life-threatening. Transplant immunopathology involves sensitization, effector, and apoptosis phases which recruit and engages immunological cells like natural killer cells, lymphocytes, neutrophils, and monocytes. Similarly, these cells are involved in the transfer of normal or genetically engineered T cells. Advances in tissue transplantation would involve a profound knowledge of the molecular mechanisms that underpin the respective immunopathology involved and the design of precision medicines that are safe and effective.

Biomechanical Evaluation of Decellularized and Crosslinked Corneal Implants Manufactured From Porcine Corneas as a Treatment Option for Advanced Keratoconus

Currently corneal transplantation is the main treatment for late-stage keratoconus; however, transplantation procedures are accompanied by significant risk of post-surgical complications; this in addition to supply limitations imposed by a worldwide shortage of human donor corneas, has driven the development of alternative therapies. One such therapy is the use of corneal implants derived from porcine corneas (Xenia^®, Gebauer Medizintechnik GmbH, Neuhausen, DE). In contrast to human donor tissue, these implants can be produced on demand and due to the processes used pose no risks for host-immune rejection. Their use has already been demonstrated clinically in patients for preventing the progression of topographic changes in keratoconus whilst improving visual acuity. The implants are derived from natural tissue and not standardised synthetic material, whilst this likely reduces the risk of issues with bio-incompatibility, there is inevitably variability in their intrinsic mechanical properties which requires investigation. Here, speckle interferometry is employed to examine the biomechanical properties, in response to physiologically representative forces, of native porcine corneal tissue prior to processing and after a proprietary 4-stage process involving decellularization, washing, compression and crosslinking. The control lenticules had an average Young’s modulus (E) of 11.11 MPa (range 8.39–13.41 MPa), following processing average E of the lenticules increased by 127% over that of the unprocessed tissue to 25.23 MPa (range 18.32–32.9 MPa). The variability in E of the lenticules increased significantly after processing suggesting variability in the propensity of the native tissue to processing. In summary, it is possible to produce thin (<90 µm) lenticules from porcine corneas with enhanced stiffness that are effective for treating late-stage keratoconus. Due to the observed variability in the responses of lenticules to processing, interferometry could be a useful technique for ensuring quality control in commercial production via biomechanical screening.

The Effects of Donor-Recipient Age and Sex Compatibility in the Outcomes of Deep Anterior Lamellar Keratoplasties

Purpose

Corneal transplantations are the commonest allogenic transplant surgeries performed worldwide. Transplantable grade donor cornea is a finite resource. There is thus an impetus for eye banks to optimize the use of each harvested cornea, and clinicians to minimize the risks of graft rejection and failure. With better survival and lower rejection rates, anterior lamellar keratoplasty has gained popularity as an alternative technique to full-thickness penetrating keratoplasty, for the treatment of corneal stromal diseases. This study evaluated the effects of donor-recipient age- and sex-matching on the outcomes of eyes that had undergone deep anterior lamellar keratoplasty (DALK) surgeries.

Design

Observational cross-sectional study (national corneal graft registry data).

Subjects

All DALK surgeries performed in a tertiary ophthalmic hospital over an 11-year period.

Methods

To analyse the effects of donor-recipient sex-matching, transplantations were classified as “presumed H-Y incompatible” (male donor to female recipient) or “presumed H-Y compatible” (all other donor-recipient sex combinations). For age-matching, differences in donor and recipient ages were calculated. Cox proportional hazards regressions were used to evaluate the influence of donor-recipient sex-matching and age-matching on graft failure and rejection.

Main Outcome Measures

Rates of graft failure and rejection within each group.

Results

401 eyes were included. 271 (67.6%) transplants were presumed H-Y compatible. 29 (7.2%) grafts failed and 9 (2.2%) grafts rejected. There were trends of lower hazard ratios (HRs) in graft failure and rejection in the presumed H-Y compatible group [HRs: 0.59 (95% CI 0.20–1.77, p = 0.34) and 0.93 (95% CI 0.22–3.89, p = 0.926), respectively]. Median difference in age between recipients and donors was 15.0 years (IQR −2.8–34.3). The HRs of graft failure and rejection were not influenced by donor-recipient age [HRs per 1-year increase in age difference: 0.995 (95% CI 0.98–1.01, p = 0.483) and 1.01 (95% CI 0.99–1.03, p = 0.394), respectively].

Conclusion

In eyes that had undergone DALK surgeries, no significant influence of donor-recipient sex- or age-matching on graft rejection and failure was observed. Without strong evidence and the limitations of obtaining sample sizes required for an adequately powered study, the benefits of sex- and age-matching of donors and recipients during graft allocation for DALK surgeries is currently inconclusive.

Family refusal of eye tissue donation from potential solid organ donors: a retrospective analysis of summary and free-text data from the UK National Health Service Blood and Transplant Services (NHS-BT) National Referral Centre (1 April 2014 to 31 March 2017)

OBJECTIVES

Long-standing undersupply of eye tissue exists both in the UK and globally, and the UK National Health Service Blood and Transplant Service (NHSBT) has called for further research exploring barriers to eye donation. This study aims to: (1) describe reported reasons for non-donation of eye tissue from solid organ donors in the UK between 1 April 2014 and 31 March 2017 and (2) discuss these findings with respect to existing theories relating to non-donation of eyes by family members.

DESIGN

Secondary analysis of a national primary data set of recorded reasons for non-donation of eyes from 2790 potential solid organ donors. Data analysis including descriptive statistics and qualitative content analysis of free-text data for 126 recorded cases of family decline of eye donation.

SETTING

National data set covering solid organ donation (secondary care).

PARTICIPANTS

2790 potential organ donors were assessed for eye donation eligibility between 1 April 2014 and 31 March 2017.

RESULTS

Reasons for non-retrieval of eyes were recorded as: family wishes (n=1339, 48% of total cases); medical reasons (n=841, 30%); deceased wishes (n=180, 7%). In >50% of recorded cases, reasons for non-donation were based on family's knowledge of the deceased wishes, their perception of the deceased wishes and specific concerns regarding processes or effects of eye donation (for the deceased body). Findings are discussed with respect to the existing theoretical perspectives.

CONCLUSION

Eye donation involves distinct psychological and sociocultural factors for families and HCPs that have not been fully explored in research or integrated into service design. We propose areas for future research and service development including potential of only retrieving corneal discs as opposed to full eyes to reduce disfigurement concerns; public education regarding donation processes; exploration of how request processes potentially influence acceptance of eye donation; procedures for assessment of familial responses to information provided during consent conversations.

The impact of biomechanics on corneal endothelium tissue engineering

The integrity of innermost layer of the cornea, the corneal endothelium, is key to sustaining corneal transparency. Therefore, disease or injury causing loss or damage to the corneal endothelial cell population may threaten vision. Transplantation of corneal tissue is the standard treatment used to replace malfunctioning corneal endothelial cells. However, this surgery is dependent upon donor tissue, which is limited in supply. Hence, tissue engineers have attempted to construct alternative transplantable tissues or cell therapies to alleviate this problem. Nevertheless, the intrinsic non-dividing nature of corneal endothelial cells continues to foil scientists in their attempts to yield large numbers of cells in the laboratory for use in such novel therapies. Interestingly, the contribution of the biomechanical properties of the underlying extracellular matrix (ECM) on cell division, tissue development and maintenance has been extensively investigated in other many cell types. However, the impact of biomechanics on corneal endothelial cell behaviour is relatively unexplored. Here, we describe contemporary tissue engineering solutions aimed at circumventing donor tissue scarcity. We review the ECM structure and biomechanical features of corneal endothelial cells. We discuss the alterations of ECM in endothelial disease development and progression and point out the role of ECM in developing a tissue-engineered corneal endothelium. We highlight the main biomechanical cues, including topographical and mechanical features, that impact cellular behaviors. Finally, we discuss the influence of biomechanical cues on cell and tissue development, and how corneal endothelial cells response to individual biomechanical stimuli in tissue engineering, which have implications for designing an engineered endothelium and maintaining cell function.

Barriers and Facilitators to Eye Donation in Hospice and Palliative Care Settings: A Scoping Review

Background: The need for eye tissue for use in sight saving and sight restoring surgery is a global issue. Approximately 53% of the world's population has no access to interventions such as corneal transplantation. Low levels of eye tissue impact on service providers such as National Health Service Blood and Transplant who aim to achieve a weekly stock of 350 eyes but do not meet this target. Aim: Patients who die in hospice and palliative care settings could be potential donors; therefore the aim of this systematic scoping review was to identify the potential for eye donation and barriers toward it from these clinical contexts. Design: A scoping review following the Joanna Briggs scoping review methodology was applied to search the global literature. Results: 13 articles from the global literature were retrieved. Evidence indicate that 542 patients could potentially have donated their eyes. Key barriers to increasing eye donation include the reluctance of healthcare professionals to raise the option of eye donation and the evidenced lack of awareness of patients and family members about donation options and eligibility. This review also indicates a lack of clinical guidance drawn from high-quality evidence proposing interventions that could inform clinical practice and service development. Conclusion: The scoping review presented here provides an up-to-date view of the current potential for, perceptions toward, and practice underpinning offering the option of eye donation to dying patients and their family members in hospice and palliative care context.

Collagen-based scaffolds with infused anti-VEGF release system as potential cornea substitute for high-risk keratoplasty: A preliminary in vitro evaluation

Currently the only widely accepted corneal blindness treatment is human donor cornea transplantation. However, increasing shortage of donor corneas as well as high risk of rejection in some corneal diseases remain two major problems, which limit the success of corneal transplantation. Corneal neovascularization is considered as one of the main risk factors of graft failure. Different cell-free biosynthetic scaffolds fabricated from collagens or collagen-like peptides are being tested as donor cornea substitutes (DCS). Here, we report for the first-time composite biosynthetic DCS with integrated sustained release system of anti-VEGF drug, bevacizumab and their preliminary in vitro validation. We have tethered gold nanoparticles with bevacizumab and integrated into a collagen-based cell-free hydrogel scaffold. Developed grafts preserved good optical properties and were confirmed not toxic to human corneal epithelial cells. Bevacizumab has been shown to constantly releasing from the DCS up to 3 weeks and preserved its anti-angiogenic properties. These results provide background for further use of infused composite biosynthetic DCS with integrated nanosystem of bevacizumab sustained release in corneal disease accompanied by neovascularisation where conventional corneal transplantation might fail.

Changing trends in corneal transplantation: a national review of current practices in the Republic of Ireland

BACKGROUND

First Irish National Corneal Transplant Registry report.

AIM

To report about current corneal transplantation practices in Ireland including patient demographics, indications and types of transplant performed and to compare the findings with other developed countries.

METHODS

Nationwide retrospective review of the corneal transplants performed in Ireland between 2016 and 2019.

RESULTS

Overall, 536 keratoplasties were carried out: 256 (47.8%) Penetrating Keratoplasties (PK), 212 (39.6%) Descemet Stripping Automated Endothelial Keratoplasties (DSAEK), 30 (5.6%) Descemet Membrane Endothelial Keratoplasties (DMEK), and 25 (4.7%) Deep Anterior Lamellar Keratoplasties (DALK). The most common indication was Keratoconus (KC, 19%), followed by Fuchs endothelial dystrophy (FED, 18.8%), and Pseudophakic bullous keratopathy (PBK, 17%). KC (34%) and re-grafting (17%) were the leading indications for PK, whereas FED and PBK were the major indications for DSAEK (38% and 33%) and DMEK (67% and 20%), respectively. During the period studied, the number of transplants increased from 11.3 to 14 grafts per month. The number of PKs remained stable, whereas Endothelial Keratoplasties, DSAEK and DMEK, increased (3.8 to 5.6 and 0.2 to 1.6 per month, respectively), becoming the most commonly performed grafts since 2018. Only a small number of DALK were performed.

CONCLUSIONS

Corneal transplantation in Ireland is following international trends as endothelial procedures have become the most common approach since 2018. However, a low overall number of transplants is performed in Ireland compared with other countries suggesting that care pathways should be implemented to improve access to corneal transplantation.

Modulation of Contact Inhibition by ZO-1/ZONAB Gene Transfer-A New Strategy to Increase the Endothelial Cell Density of Corneal Grafts

Purpose

Endothelial cell density (ECD) is the principal factor determining the success of corneal transplants. Here we explored a strategy to increase corneal ECD in human explants via modulation of the ZO-1/ZONAB pathway. In multiple cell types, ZO-1 maintains G1 cell cycle arrest via cytoplasmic sequestration of the mitosis-inducing transcription factor ZONAB. In this study, we assessed the effects of lentiviral vector-mediated downregulation of ZO-1 or overexpression of ZONAB upon ECD and the integrity of the endothelial monolayer.

Methods

HIV-based lentiviral vectors were used to deliver either constitutively expressed ZONAB (LNT-ZONAB), or a small hairpin RNA targeting ZO-1 (LNT-shZO1). Human corneal specimens were bisected and each half was exposed to either treatment or control vector. After 1 week in ex vivo culture, effects were assessed by quantitative RT-PCR, immunohistochemistry, and ECD assessment.

Results

LNT-shZO1 achieved an ∼45% knockdown of ZO-1 mRNA in corneal endothelial cells cultured ex vivo, reduced ZO-1 staining, and did not affect morphologic endothelial monolayer integrity. The proliferative effect of LNT-shZO1 correlated with control ECD but not with donor age. Within a low-ECD cohort an ∼30% increase in ECD was observed. LNT-ZONAB achieved a >200-fold overexpression of ZONAB mRNA, which led to an ∼25% increase in ECD.

Conclusions

ZO-1 downregulation or ZONAB upregulation increases corneal ECD via interference with contact inhibition and cell cycle control. With further development, such approaches might provide a means for improving ECD in donor corneas before transplantation.

Incentivizing organ donation through a nonmonetary posthumous award

Since 2013, The Order of St John Award for Organ Donation has been offered to the families of deceased solid organ donors in the United Kingdom to honor the donors and inspire others to donate. We evaluate the effects of this award using a difference-in-differences approach that builds on the fact that solid organ donors are eligible for the award, whereas cornea-only donors are not. We find that the introduction of the award led to an increase in the number of deceased solid organ donors.

Knowledge and Attitude toward Eye Donation among Adults, Northwest Ethiopia: A Community-based, Cross-sectional Study

BACKGROUND:

In developing countries, the leading cause of childhood blindness is corneal scarring. Although the service of corneal transplantation depends on several factors, availability of potential donors is of paramount importance. Attitude of eligible donors is the main factor that affects corneal supply. However, limited data exist on eye donation. Hence, this study intended to assess the knowledge and attitude toward eye donation and its associated factors.

SUBJECTS AND METHODS:

A community-based, cross-sectional study was conducted on 760 adults aged ≥18 years selected using multistage systematic random sampling in Gondar town, Northwest Ethiopia. A face-to-face structured questionnaire interview in home-to-home visit was applied to collect the data. Descriptive and analytical tests were performed. A binary logistic regression was fitted. Those variables with P < 0.05 were considered statistically significant.

RESULTS:

This study comprised 760 adults with a median age of 30 years. The proportion of overall level of good knowledge and favorable attitude toward eye donation was 8.4% and 59.9%, respectively. It has been also recognized that attitude was positively associated with educational level of high school (adjusted odds ratio [AOR] = 2.41, 95% confidence interval [CI]: 1.41–4.14) and college/university (AOR = 2.73, 95% CI: 1.53–4.89) and awareness (AOR = 1.50, 95% CI: 1.05–2.03).

CONCLUSIONS:

Although the overall level of knowledge about eye donation was poor, the proportion of favorable attitude toward eye donation was fair. Since it was associated with educational level and awareness, it is strategic to follow multidisciplinary approaches to facilitate multi-stakeholder partnerships and to motivate the people to donate their eyes.

Microbial contamination and tissue procurement location: A conventional operating room is not mandatory. An observational study

BACKGROUND

Standard operating rooms (SOR) are assumed to be the best place to prevent microbial contamination when performing tissue procurement. However, mobilizing an operating room is time and cost consuming if no organ retrieval is performed. In such case, non-operating dedicated rooms (NODR) are usually recommended by European guidelines for tissue harvesting. Performing the tissue retrieval in the Intensive care unit (ICU) when possible might be considered as it allows a faster and simpler procedure.

OBJECTIVE

Our primary objective was to study the relationship between the risk of microbial contamination and the location (ICU, SOR or NODR) of the tissue retrieval in heart-beating and non-heart-beating deceased donors.

MATERIALS AND METHOD

We retrospectively reviewed all deceased donors' files of the local tissue banks of Montpellier and Marseille from January 2007 to December 2014. The primary endpoint was the microbial contamination of the grafts. We built a multivariate regression model and used a GEE (generalized estimating equations) allowing us to take into account the clustered structure of our data.

RESULTS

2535 cases were analyzed involving 1027 donors. The retrieval took place for 1189 in a SOR, for 996 in a hospital mortuary (NODR) and for 350 in an ICU. 285 (11%) microbial contaminations were revealed. The multivariate analysis found that the location in a hospital mortuary was associated with a lower risk of contamination (OR 0.43, 95% CI [0.2-0.91], p = 0.03). A procurement performed in the ICU was not associated with a significant increased risk (OR 0.62, 95% CI [0.26-1.48], p = 0.4).

CONCLUSION

According to our results, performing tissue procurement in dedicated non-sterile rooms could decrease the rate of allograft tissue contamination. This study also suggests that in daily clinical practice, transferring patients from ICU to SOR for tissue procurement could be avoided as it does not lead to less microbial contamination.

Corneal Donor Profile and Evolution of Corneal Donation in a Brazilian State Where the Number of Individuals on the Waiting List Reached Zero But Increased Again

BACKGROUND

In most countries, the amount of corneal graft tissue available for transplantation is insufficient to meet demand. In 2010, there were 459 patients on the waiting list for corneal transplantation (WLCT) in Espirito Santo (ES), a Brazilian state with 3,885,000 inhabitants. Several strategies were implemented to reduce the number of individuals on the WLCT, which reached zero in 2011. Studies on the evolution of corneal donation contribute to reducing the WLCT worldwide. The aim of this study was to describe the evolution of corneal donation in ES and the profile of corneal donors from 2010 to 2013.

METHODS

This was a retrospective study. The data were collected from records referring to donations of corneas and from the archives of the Center for Organ Procurement and Distribution of ES. Statistical software was used to perform descriptive analysis of the data.

RESULTS

The sample consisted of 1359 donors, aged 46.82 ± 17.32 (mean ± standard deviation), 70.1% of whom were male. Most of the consent forms for donation were signed by the sons of the donors. In 2011, there was a major increase (105%) in the number of corneal transplants compared with 2010; consequently, the number of patients on the WLCT reached zero, but increased again, reaching 139 patients in 2013.

CONCLUSION

This study shows that strategies to increase corneal donations should be continued even after reduction or elimination waiting time on the WLCT.

Corneal transplantation: A new view of life

BACKGROUND

The consequences of a corneal transplant are evaluated and classified by care providers, but understanding and interpretation of the results varies between patients, and creates different views for them and influences their lives in different ways while these influences are largely unknown.

AIM

This study aimed to explore understanding of new life in patients after corneal transplantation.

METHODS

This qualitative study was conducted using a hermeneutic phenomenological approach in Tehran in 2016. Twelve corneal transplant recipients (7 men, 5 women) who were chosen purposefully from penetrating corneal transplant recipients, participated in this study. Semi-structured interviews were used to collect data. The content of the interviews was transcribed and analyzed using Van Manen's methodology.

RESULTS

Data analysis led to the emergence of several main themes, among which "having a new sense" and "fear and hope" were two of the most important themes.

CONCLUSION

It can be inferred from the overall participants' experiences that corneal transplant has brought about a new look at life for patients. However, transplant-related issues are endless and continuous, and a sense of fear and hope has always surrounded them.

Suitability of Corneal Tissue for Transplantation Derived From Violent Death: A 10-Year Analysis

Trauma is a leading cause of death and disability worldwide. Corneal tissue donors generally are those who suffered an injury to the brain or fatal trauma caused by stroke, vehicle/motorbike accidents, gunshot wounds, and drowning or cardiovascular death. In Brazil, the Distrito Federal (DF) Eye Bank, located within a trauma center hospital, and the Secretariat of Public Security have collaborated with the aim of increasing the overall number of cornea donations from fatal trauma victims. The purpose of this study was to determine the suitability of cornea tissue for transplantation derived from trauma-related death. The records of eyes donated in the DF Eye Bank were analyzed retrospectively for the period from 2004-2013. We had 3388 cornea donors, the majority of which were between 21 and 30 years old (17.4%), which were derived from violent death (84.1%; P = .00) and were predominately male (73.5%). Among the donated corneas, 54.0% were used for optic purposes. Mechanical trauma caused by gunshot, stabbing or blunt force (23.7%), and road traffic injuries (11%) were the main causes of violent death. Another common cause of death was cardiovascular disease (26.3%). Donor tissue derived from violent death had no statistical interference on tissue suitability for transplantation (P = .06). Because of the large waiting lists, and waiting times for transplants, it is advisable to increase the available tissue from corneas donors derived from violent death through the implementation of this interagency model of collaboration and by the practicing of active tissue donor screening in trauma center hospitals.

Deceased tissue donor serology and molecular testing for HIV, hepatitis B and hepatitis C viruses: a lack of cadaveric validated tests

Vital to patient safety is the accurate assessment and minimization of risk for human immunodeficiency virus (HIV), Hepatitis C (HCV), and Hepatitis B (HBV) virus transmission by deceased donor organ and tissue transplantation. The pathogens are tested by serological kits based on enzyme-linked immunosorbent assay (ELISA), chemiluminescence (CLIA) and eletrochemiluminescence (ECLIA) immunoassays. Organ transplantation is a highly successful life-saving treatment in Brazil, but the Brazilian Health Surveillance Agency currently mandates that all deceased organ donors are screened for HIV, HCV and HBV following living donor policies. In this review, six ELISA (Wama^®, Bio-Rad^®, Biomerieux^®, DiaSorin^®, Acon Biotech^® and Biokit^®), three CLIA (Abbott^®, Siemens^®, Diasorin^®) and one ECLIA (Roche^®) were utilized for evaluating the effectiveness of those serological tests for deceased donors in Brazil according to manufacturer's guidelines. NAT for HIV, HCV and HBV can assist with detection of pre-seroconversion for those infections, and only Cobas^® TaqScreen MPX^® test, the Tigris System^® Procleix Ultrio Assay^® and the Bio-Manguinhos^® HIV/HCV/HBV NAT are commercially available. Between all the tests, only the manufacturer Abbott^® and Cobas^® TaqScreen MPX^® test are currently validated for cadaver samples.

Impact of telephone consent and potential for eye donation in the UK: the Newcastle Eye Centre study

AIMS

To examine the impact of telephone consent introduced in 2007 on the eye donation rate and to report the changing trend and potential for improvement in eye donation in Newcastle upon Tyne, UK.

METHODS

Relevant data were retrospectively collected from the local eye retrieval database for two separate years, namely, 2006 (before the introduction of telephone consent) and 2010. All the hospitals within Newcastle were included in the study.

RESULTS

From 2006 to 2010, there was a 3.5-fold increase in eye donation from 32 (of 2479 deaths) to 111 donors per year (of 2213 deaths) in Newcastle (P<0.001). Consent was obtained via face-to-face interview in all 32 (100%) and 59 (53.2%) donors in 2006 and 2010, respectively. Introduction of telephone consent increased the donation rate by an additional 88.1% (from 59 to 111 donors) in 2010 (P<0.001). In addition, there was a significant increase in medical notes of the deceased being reviewed from 27.1% (671/2479 cases) in 2006 to 62.4% (1382/2213 cases) in 2010 (P<0.001). Acceptance rate of eye donation was 45.7% (32/70) in 2006 and 49.6% (111/224) in 2010 (P=0.575). Acceptance rate was positively associated with registration on organ donor register (P<0.001) and telephone consent (P<0.001), but not with age (P=0.883), gender (P=0.234), or location of death (P=0.984) of the potential donors.

CONCLUSION

There has been a substantial improvement in eye donation rate in Newcastle over the recent years. Introduction of telephone consent and high-quality eye donation service serve as effective measures for increasing eye donation.

Implementation intentions as a strategy to increase the notification rate of potential ocular tissue donors by nurses: a clustered randomized trial in hospital settings

Aim. The purpose of this study is to evaluate the impact, among nurses in hospital settings, of a questionnaire-based implementation intentions intervention on notification of potential ocular tissue donors to donation stakeholders. Methods. This randomized intervention was clustered at the level of hospital departments with two study arms: questionnaire-based implementation intentions intervention and control. In the intervention group, nurses were asked to plan specific actions if faced with a number of barriers when reporting potential ocular donors. The primary outcome was the potential ocular tissue donors' notification rate before and after the intervention. Analysis was based on a generalized linear model with an identity link and a binomial distribution. Results. We compared outcomes in 26 departments from 5 hospitals, 13 departments per condition. The implementation intentions intervention did not significantly increase the notification rate of ocular tissue donors (intervention: 23.1% versus control: 21.1%; χ (2) = 1.14, 2; P = 0.56). Conclusion. A single and brief implementation intentions intervention among nurses did not modify the notification rate of potential ocular tissue donors to donation stakeholders. Low exposure to the intervention was a major challenge in this study. Further studies should carefully consider a multicomponent intervention to increase exposure to this type of intervention.

Understanding selective refusal of eye donation. Identity, beauty, and interpersonal relationships

Corneal transplantation is the most common form of organ transplantation performed globally. However, of all organs, eyes have the highest rate of refusal of donation. This study explored the reasons why individuals decide whether or not to donate corneas. Twenty-one individuals were interviewed who had made a donation decision (13 refused corneal donation and eight consented). Analysis was performed using Grounded Theory. Refusal of corneal donation was related to concerns about disfigurement and the role of eyes in memory and communication. The request for donation therefore raised concerns about a potential adverse change in the ongoing relationship with the deceased, even in death. For those who refused donation, these concerns overshadowed awareness of need or benefit of transplantation. Adjusting the donation message to be more congruent with the real, lived experience of corneal donation may to some extent "prepare" individuals when the donation question is raised.

Main causes of nonfulfillment of corneal donation in five hospitals of a Brazilian state

The waiting list for corneal transplantation in Brazil had 6684 patients in June 2012, with great variations in the number of patients among different states. The mean waiting time for a corneal transplant also differs substantially across the states: it is 2 years in State of Espirito Santo (ES) at the time of this study. The aim of the study was to determine the main reasons for nonfulfillment of corneal donation in five ES hospitals. The data collection was performed from March to August 2010. The data were collected using forms completed daily by the Intrahospital Commissions of Organ and Tissues Donation for Transplantation. The total number of deaths was 1347. The main causes of nonfulfillment of donations were medical contraindications (67.86%), logistical/structural problems (27.84%), and family refusal (2.15%). The main medical contraindications were age outside the required range (24.49%), the presence of infectious disease (11.36%), or age outside the range plus infection (15.66%). In 2010, there were 459 people on the waiting list for corneas in ES. Considering the average of failures in these five hospitals multiplied by the number of hospitals in the ES, it seems clear that the solutions to these problems might eliminate the waiting list of the State. In fact, the number of individuals on the waiting list in ES did reach zero in August 2011, after the inauguration of a new Eye Bank that trains employees to interview and perform procurements, in addition to keeping them available in the most important hospitals. Additionally, the maximal age for donation in ES was increased.