Oncology and Palliative Care Integration Model: A Cost Analysis Study in a Brazilian Hospital Setting.

Background: In 2019, the São Paulo State Cancer Institute (ICESP) implemented a novel model integrating Oncology with Palliative Care specialists. We evaluated the impact of this model on healthcare resource utilization and costs. Methods: We analyzed data from all patients who passed away in February (1 month prior to implementation) and November (8 months after model implementation group) at ICESP, Brazil. Healthcare utilization data, including emergency department visits, hospital and intensive care unit admissions, chemotherapy, and radiotherapy use, were retrieved from Electronic Medical Records. Unit cost values were obtained from the administrative database. Results: A total of 198 patients who died in February and 196 in November were included in the analysis. Groups exhibited similarities in sex, age, ECOG, cancer type, previous outpatient palliative care consultations, and place of death (ward: 56.6% pre-intervention, 50% post-intervention). The mean cost per patient was US$13,226.29 pre-intervention and US$11,445.82 post-intervention (P = .007). Statistically significant differences were noted in days hospitalized in the surgical ward (227 vs 115), emergency department visits (233 vs 45), chemotherapy sessions (140 vs 26), and radiotherapy sessions (146 vs 10). Excluding outpatient treatments, the total costs for chemotherapy and radiotherapy in the last 30 days of life were US$16,924.45 pre-intervention and US$7851.65 post-intervention. Reductions were more pronounced in patients with ECOG 3-4 (P = .039). Conclusion: Our data suggests that the integration model was associated with a reduction in potentially inappropriate treatments during the last month of life, leading to decreased healthcare utilization and costs.

Palliative cancer care: costs in a Brazilian quaternary hospital.

Palliative care (PC) improves the quality of life of patients with diseases such as cancer, and several studies have shown a reduction in costs among patients who use PC services when compared with those receiving standard oncological treatments. Most studies on PC costs are carried out in high-income countries. There is a lack of these types of studies in middle-income and low-income countries and of better evidence about this intervention. OBJECTIVE: To describe resource utilisation and costs among patients with cancer in a Brazilian quaternary hospital by cancer localisation and per month of treatment before death. METHODS: This study is a description of retrospective costs to estimate the costs of formal healthcare sector associated with PCs, from the perspective of a public quaternary cancer hospital. Unit costs were estimated using microcosting and macrocosting approaches. SETTING/PARTICIPANTS: Patients older than 18 years old who died from 2010 to 2013 and who had at least two visits in PC and/or made use of hospice care. RESULTS: Among the 2985 patients included in the study, the average cost per patient was US$12 335, ranging from US$8269 for patients with pancreatic cancer to US$19 395 for patients with brain cancer. The main costing item was hospital admission (47.6% of the total cost), followed by hospice care (29.5%) and medical and other supplies (11.1%). CONCLUSIONS: The study clarified the direct medical costs and the profile and use of resources of patients with cancer who need PC, and can help in the planning and allocation of resources in cancer care.

Validity and reliability of the Brazilian version of the Patient Dignity Inventory (PDI - Br).

OBJECTIVE: to perform the psychometric validation of the Brazilian version of the Patient Dignity Inventory (PDI - Br) in patients with advanced diseases in palliative care. METHOD: a methodological study to verify the psychometric properties of the Patient Dignity Inventory (PDI - Br) instrument, through validity and reliability tests. RESULTS: the exploratory factor analysis showed a factorial solution with three factors, responsible for 40.9% of the explained variance, with adequate internal consistency for the Presence of Symptoms (α=0.859), Dependence (α=0.871), and Existential Suffering (α=0.759) domains. The test-retest was performed and indicated moderate to strong correlations. Convergent validity demonstrated a positive correlation between the Presence of Symptoms and the sadness (r=0.443) and anxiety (r=0.464) variables. Weak negative correlations were observed between the PDI - Br domains and functionality, spiritual well-being and quality of life. CONCLUSION: composed of three domains and 25 items, the PDI - Br instrument presented satisfactory psychometric properties for its use in our environment, through the evidence of validity and reliability.

Validity and reliability of the Brazilian version of the Patient Dignity Inventory (PDI - Br) / Validade e confiabilidade da versão brasileira do Patient Dignity Inventory (PDI -Br) / Validez y confiabilidad de la versión brasileña del Patient Dignity Inventory (PDI - Br)

Objective: to perform the psychometric validation of the Brazilian version of the Patient Dignity Inventory (PDI - Br) in patients with advanced diseases in palliative care. Method: a methodological study to verify the psychometric properties of the Patient Dignity Inventory (PDI - Br) instrument, through validity and reliability tests. Results: the exploratory factor analysis showed a factorial solution with three factors, responsible for 40.9% of the explained variance, with adequate internal consistency for the Presence of Symptoms (α=0.859), Dependence (α=0.871), and Existential Suffering (α=0.759) domains. The test-retest was performed and indicated moderate to strong correlations. Convergent validity demonstrated a positive correlation between the Presence of Symptoms and the sadness (r=0.443) and anxiety (r=0.464) variables. Weak negative correlations were observed between the PDI - Br domains and functionality, spiritual well-being and quality of life. Conclusion: composed of three domains and 25 items, the PDI - Br instrument presented satisfactory psychometric properties for its use in our environment, through the evidence of validity and reliability.

Objetivo: realizar a validação psicométrica da versão brasileira do Patient Dignity Inventory (PDI - Br), em pacientes com doenças avançadas em cuidados paliativos. Método: estudo metodológico de verificação das propriedades psicométricas do instrumento Patient Dignity Inventory (PDI - Br), por meio de testes de validade e confiabilidade. Resultados: a análise fatorial exploratória mostrou solução fatorial com 3 fatores, responsáveis por 40,9% da variância explicada, com consistência interna adequada para os domínios Presença de Sintomas (α=0,859), Dependência (α=0,871) e Sofrimento Existencial (α=0,759). O teste-reteste foi realizado e indicou correlações moderadas a fortes. A validade convergente demonstrou correlação positiva entre a Presença de Sintomas e as variáveis de tristeza (r=0,443) e ansiedade (r=0,464). Foram observadas correlações negativas fracas entre os domínios do PDI-Br e a funcionalidade, o bem-estar espiritual e a qualidade de vida. Conclusão: o PDI-Br composto por três domínios e 25 itens apresentou propriedades psicométricas satisfatórias para o uso do instrumento em nosso meio, por meio das evidências de validade e confiabilidade.

Objetivo: realizar la validación psicométrica de la versión brasileña del Patient Dignity Inventory (PDI - Br) en pacientes con enfermedades avanzadas que reciben cuidados paliativos. Método: estudio metodológico de verificación de las propiedades psicométricas del instrumento Patient Dignity Inventory (PDI - Br), a través de tests de validez y confiabilidad. Resultados: el análisis factorial exploratorio mostró una solución factorial con 3 factores, que explican una varianza del 40,9%, con una consistencia interna adecuada para los dominios de Presencia de Síntomas (α=0,859), Dependencia (α=0,871) y Sufrimiento Existencial (α=0,759) Se realizó un test-retest que indicó correlaciones moderadas a fuertes. La validez convergente demostró una correlación positiva entre la Presencia de Síntomas y las variables de tristeza (r=0,443) y ansiedad (r=0,464). Se observaron correlaciones negativas débiles entre los dominios del PDI - Br y la funcionalidad, el bienestar espiritual y la calidad de vida. Conclusión: compuesto por tres dominios y 25 ítems, el PDI - Br presentó propiedades psicométricas satisfactorias a través de los resultados de validez y confiabilidad, que hacen adecuado el uso de este instrumento en nuestro medio.

Palliative care consultation team: symptom relief in first 48 hours of hospitalization.

OBJECTIVE: To compare the relief of symptoms provided by palliative care consultation team (PCCT) compared to the traditional care team (TC), in patients with advanced cancer in the first 48 hours of hospitalization. METHOD: Allocated to PCCT Group and TC Group, this study assessed 290 patients according to the Edmonton Symptom Assessment System (ESAS) within the first 48 hours of hospitalization. The main outcome was a minimum 2-point reduction in symptom intensity. RESULTS: At 48 hours, the PCCT Group had a 2-point reduction in the mean differences (p <0.001) in pain, nausea, dyspnea, and depression; and TC Group, on nausea and sleep impairment (p <0.001). Multiple Logistic Regression found for the PCCT Group a greater chance of pain relief (OR 2.34; CI 1.01-5.43; p = 0.049). CONCLUSION: There was superiority of the PCCT Group for pain relief, dyspnea and depression. There is a need for more studies that broaden the understanding of team modalities.

Palliative care consultation team: symptom relief in first 48 hours of hospitalization / Equipo interconsultor en cuidados paliativos: alivio de síntomas en las primeras 48 horas de hospitalización / Equipe interconsultora em cuidados paliativos: alívio de sintomas nas primeiras 48 horas de hospitalização

ABSTRACT Objective: To compare the relief of symptoms provided by palliative care consultation team (PCCT) compared to the traditional care team (TC), in patients with advanced cancer in the first 48 hours of hospitalization. Method: Allocated to PCCT Group and TC Group, this study assessed 290 patients according to the Edmonton Symptom Assessment System (ESAS) within the first 48 hours of hospitalization. The main outcome was a minimum 2-point reduction in symptom intensity. Results: At 48 hours, the PCCT Group had a 2-point reduction in the mean differences (p <0.001) in pain, nausea, dyspnea, and depression; and TC Group, on nausea and sleep impairment (p <0.001). Multiple Logistic Regression found for the PCCT Group a greater chance of pain relief (OR 2.34; CI 1.01-5.43; p = 0.049). Conclusion: There was superiority of the PCCT Group for pain relief, dyspnea and depression. There is a need for more studies that broaden the understanding of team modalities.

RESUMEN Objetivo: Comparar el alivio de síntomas obtenido por equipo interconsultor en cuidados paliativos (ICP) al obtenido por equipo de cuidado tradicional (CT), en enfermos con cáncer avanzado en las primeras 48 horas de hospitalización. Método: Alocados en los Equipos ICP y Equipo CT, 290 pacientes han sido evaluados por la Escala de Síntomas de Edmonton (ESAS) en las primeras 48 horas de la hospitalización. El desenlace principal ha sido la reducción mínima de 2 puntos en la intensidad de síntomas. Resultados: En 48 horas, el Equipo ICP tuvo reducción de 2 puntos en las medias de las diferencias (p < 0,001) del dolor, náusea, disnea y depresión; y el Equipo CT, en la náusea y perjuicio del sueño (p < 0,001). Regresión Logística Múltiple mostró para el Equipo ICP mayor oportunidad de alivio del dolor (RC 2,34; CI 1,01-5,43; p = 0,049). Conclusión: Hubo superioridad del Equipo ICP para alivio del dolor, disnea y depresión. Estudios que amplíen la comprensión acerca de las modalidades de equipo son necesarios.

RESUMO Objetivo: Comparar o alívio de sintomas obtido por equipe interconsultora em cuidados paliativos (ICP) ao obtido por equipe de cuidado tradicional (CT), em doentes com câncer avançado nas primeiras 48 horas de hospitalização. Método: Alocados nos Grupos ICP e Grupo CT, 290 pacientes foram avaliados pela Escala de Sintomas de Edmonton (ESAS) nas primeiras 48 horas da hospitalização. O desfecho principal foi a redução mínima de 2 pontos na intensidade de sintomas. Resultados: Em 48 horas, o Grupo ICP teve redução de 2 pontos nas médias das diferenças (p < 0,001) da dor, náusea, dispneia e depressão; e o Grupo CT, na náusea e prejuízo do sono (p < 0,001). Regressão Logística Múltipla mostrou para o Grupo ICP maior chance de alívio da dor (RC 2,34; CI 1,01-5,43; p = 0,049). Conclusão: Houve superioridade do Grupo ICP para alívio da dor, dispneia e depressão. Estudos que ampliem a compreensão sobre modalidades de equipe são necessários.

8K ultra-high-definition microscopic camera for ophthalmic surgery.

BACKGROUND: We have developed a new compact lightweight 8K ultra-high-definition (UHD; 7,680×4,320 pixels) camera and started medical application with an ophthalmic surgical microscope which is interchangeable with the conventional high-definition (1,920×1,080 pixels)/4K UHD (3,840×2,160 pixels) microscopic camera. METHODS: We did a feasibility study to apply our 8K UHD microscope in cataract surgery, glaucoma surgery and vitreous surgery using pig cadaver eyes. The 8K UHD microscope comprises a surgical microscope, a camera adaptor with relay lenses, an 8K UHD camera and an 8K UHD LCD to share the 8K UHD images with all surgical staff in real time. RESULTS: In ophthalmic surgeries, higher resolution images than conventional microscopic cameras were obtained with 8K UHD LCD equivalent to the observation through the microscopic eye pieces. CONCLUSION: Based on the results of this feasibility study, clinical trials on human ophthalmic surgery using the new 8K UHD microscopic camera should be conducted in the near future.

Early Palliative Care and Its Impact on End-of-Life Care for Cancer Patients in Brazil.

BACKGROUND: Integrating palliative care into standard oncology care has been recommended for cancer patients. Early palliative care is associated with less aggressive treatment at the end of life. OBJECTIVE: To describe cancer patients receiving palliative care in Brazil, determining the time from entry into palliative care to death, and investigating whether late referral to palliative care is associated with aggressive end-of-life treatment. DESIGN: This was a cross-sectional study of cancer patients receiving palliative care in Brazil. SETTING/SUBJECTS: Subjects were 2985 cancer patients ≥18 years of age who received at least two palliative care visits at the São Paulo State Cancer Institute, in the city of São Paulo, Brazil, and died between 2010 and 2013. MEASUREMENTS: We evaluated the time from the first palliative care consult to death, stratifying cases by the timing of entry into palliative care (≥3 or <3 months before death). The associations between early palliative care and indicators of aggressive treatment were assessed by Pearson's chi-square test and Fisher's exact test. RESULTS: The overall median time between entry into palliative care and death was 34 days (mean, 72 days) and was significantly shorter in 2013 than in 2010 (p < 0.001). The number of emergency department visits was significantly lower among the patients who entered palliative care earlier (p < 0.001). CONCLUSIONS: Among cancer patients in Brazil, late referral to palliative care is common. Patients who enter palliative care earlier appear to receive less aggressive end-of-life treatment.

Effect of an 8K ultra-high-definition television system in a case of laparoscopic gynecologic surgery.

Various endoscopic devices have been developed for advanced minimally invasive surgery. We recently applied a new 8K ultra-high-definition television system during laparoscopic treatment of endometriosis. The procedure, which is described in detail, stands as the first reported application of an 8K ultra-high-definition system for laparoscopic gynecologic surgery. Comparison is made between depiction of the lesion by the new system and depiction by a full high-definition system. Improved diagnostic accuracy resulted from the increased image resolution, and we believe that this and other advantages will lead to widespread acceptance and further application of 8K ultra-high-definition systems in the field of gynecologic surgery.

Ultra-high definition (8K UHD) endoscope: our first clinical success.

BACKGROUND: We have started clinical application of 8K ultra-high definition (UHD; 7680 × 4320 pixels) imaging technology, which is a 16-fold higher resolution than the current 2K high-definition (HD; 1920 × 1080 pixels) technology, to an endoscope for advanced laparoscopic surgery. RESULTS: Based on preliminary testing experience and with subsequent technical and system improvements, we then proceeded to perform two cases of cholecystectomy and were able to achieve clinical success with an 8K UHD endoscopic system, which consisted of an 8K camera, a 30-degrees angled rigid endoscope with a lens adapter, a pair of 300-W xenon light sources, an 85-inch 8K LCD and an 8K video recorder. These experimental and clinical studies revealed the engineering and clinical feasibility of the 8K UHD endoscope, enabling us to have a positive outlook on its prospective use in clinical practice. CONCLUSIONS: The 8K UHD endoscopy promises to open up new possibilities for intricate procedures including anastomoses of thin nerves and blood vessels as well as more confident surgical resections of a diversity of cancer tissues. 8K endoscopic imaging, compared to imaging by the current 2K imaging technology, is very likely to lead to major changes in the future of medical practice.

Fetal Gene Therapy for Ornithine Transcarbamylase Deficiency by Intrahepatic Plasmid DNA-Micro-Bubble Injection Combined with Hepatic Ultrasound Insonation.

We evaluated the therapeutic efficacy of hepatic transfection of plasmid DNA using micro-bubbles and ultrasound insonation for fetal correction of ornithine transcarbamylase (OTC) deficiency in mice. Twenty-three sparse-fur heterozygous pregnant mice (day 16 of gestation) were divided into three groups: injection of plasmid-DNA micro-bubble mixture into fetal liver with ultrasound insonation (Tr, n = 11); control group 1 (C1), injection of plasmid-DNA micro-bubble mixture into fetal liver with no insonation (n = 5); and control group 2 (C2), injection of saline-micro-bubble mixture into fetal liver with ultrasound insonation (n = 7). Levels of blood ammonia and urinary orotic acid were significantly lower in the Tr group than in the C1 and C2 groups (p < 0.05, p < 0.01, respectively), whereas OTC activity was not different between groups. Therefore, ultrasound insonation with micro-bubbles enhanced plasmid DNA transfection into fetal mouse liver, leading to one of the therapeutic methods in ammonia metabolism. This might provide more time for OTC-deficient infants until liver transplantation.

Validation of questionnaire on the Spiritual Needs Assessment for Patients (SNAP) questionnaire in Brazilian Portuguese.

OBJECTIVES: Spirituality is related to the care and the quality of life of cancer patients. Thus, it is very important to assess their needs. The objective of this study was the translation and cultural adjustment of the Spiritual Needs Assessment for Patients (SNAP) questionnaire to the Brazilian Portuguese language. METHODOLOGY: The translation and cultural adjustment of the SNAP questionnaire involved six stages: backtranslation, revision of backtranslation, translation to the original language and adjustments, pre-test on ten patients, and test and retest with 30 patients after three weeks. Adult patients, with a solid tumour and literate with a minimum of four years schooling were included. For analysis and consistency we used the calculation of the Cronbach alpha coefficient and the Pearson linear correlation. RESULTS: The final questionnaire had some language and content adjustments compared to the original version in English. The correlation analysis of each item with the total score of the questionnaire showed coefficients above 0.99. The calculation of the Cronbach alpha coefficient was 0.9. The calculation of the Pearson linear correlation with the test and retest of the questionnaire was equal to 0.95. CONCLUSION: The SNAP questionnaire translated into Brazilian Portuguese is adequately reliable and consistent. This instrument allows adequate access to spiritual needs and can help patient care.

Towards scene adaptive image correspondence for placental vasculature mosaic in computer assisted fetoscopic procedures.

BACKGROUND: Visualization of the vast placental vasculature is crucial in fetoscopic laser photocoagulation for twin-to-twin transfusion syndrome treatment. However, vasculature mosaic is challenging due to the fluctuating imaging conditions during fetoscopic surgery. METHOD: A scene adaptive feature-based approach for image correspondence in free-hand endoscopic placental video is proposed. It contributes towards existing techniques by introducing a failure detection method based on statistical attributes of the feature distribution, and an updating mechanism that self-tunes parameters to recover from registration failures. RESULTS: Validations on endoscopic image sequences of a phantom and a monkey placenta are carried out to demonstrate mismatch recovery. In two 100-frame sequences, automatic self-tuned results improved by 8% compared with manual experience-based tuning and a slight 2.5% deterioration against exhaustive tuning (gold standard). CONCLUSION: This scene-adaptive image correspondence approach, which is not restricted to a set of generalized parameters, is suitable for applications associated with dynamically changing imaging conditions. Copyright © 2015 John Wiley & Sons, Ltd.

Self-contained image mapping of placental vasculature in 3D ultrasound-guided fetoscopy.

BACKGROUND: Surgical navigation technology directed at fetoscopic procedures is relatively underdeveloped compared with other forms of endoscopy. The narrow fetoscopic field of views and the vast vascular network on the placenta make examination and photocoagulation treatment of twin-to-twin transfusion syndrome challenging. Though ultrasonography is used for intraoperative guidance, its navigational ability is not fully exploited. This work aims to integrate 3D ultrasound imaging and endoscopic vision seamlessly for placental vasculature mapping through a self-contained framework without external navigational devices. METHODS: This is achieved through development, integration, and experimentation of novel navigational modules. Firstly, a framework design that addresses the current limitations based on identified gaps is conceptualized. Secondly, integration of navigational modules including (1) ultrasound-based localization, (2) image alignment, and (3) vision-based tracking to update the scene texture map is implemented. This updated texture map is projected to an ultrasound-constructed 3D model for photorealistic texturing of the 3D scene creating a panoramic view of the moving fetoscope. In addition, a collaborative scheme for the integration of the modular workflow system is proposed to schedule updates in a systematic fashion. Finally, experiments are carried out to evaluate each modular variation and an integrated collaborative scheme of the framework. RESULTS: The modules and the collaborative scheme are evaluated through a series of phantom experiments with controlled trajectories for repeatability. The collaborative framework demonstrated the best accuracy (5.2 % RMS error) compared with all the three single-module variations during the experiment. Validation on an ex vivo monkey placenta shows visual continuity of the freehand fetoscopic panorama. CONCLUSIONS: The proposed developed collaborative framework and the evaluation study of the framework variations provide analytical insights for effective integration of ultrasonography and endoscopy. This contributes to the development of navigation techniques in fetoscopic procedures and can potentially be extended to other applications in intraoperative imaging.

Novel, high-definition 3-D endoscopy system with real-time compression communication system to aid diagnoses and treatment between hospitals in Thailand.

INTRODUCTION: Traditionally, laparoscopy has been based on 2-D imaging, which represents a considerable challenge. As a result, 3-D visualization technology has been proposed as a way to better facilitate laparoscopy. We compared the latest 3-D systems with high-end 2-D monitors to validate the usefulness of new systems for endoscopic diagnoses and treatment in Thailand. METHODS: We compared the abilities of our high-definition 3-D endoscopy system with real-time compression communication system with a conventional high-definition (2-D) endoscopy system by asking health-care staff to complete tasks. Participants answered questionnaires and whether procedures were easier using our system or the 2-D endoscopy system. RESULTS: Participants were significantly faster at suture insertion with our system (34.44 ± 15.91 s) than with the 2-D system (52.56 ± 37.51 s) (P < 0.01). Most surgeons thought that the 3-D system was good in terms of contrast, brightness, perception of the anteroposterior position of the needle, needle grasping, inserting the needle as planned, and needle adjustment during laparoscopic surgery. Several surgeons highlighted the usefulness of exposing and clipping the bile duct and gallbladder artery, as well as dissection from the liver bed during laparoscopic surgery. In an image-transfer experiment with RePure-L®, participants at Rajavithi Hospital could obtain reconstructed 3-D images that were non-inferior to conventional images from Chulalongkorn University Hospital (10 km away). CONCLUSION: These data suggest that our newly developed system could be of considerable benefit to the health-care system in Thailand. Transmission of moving endoscopic images from a center of excellence to a rural hospital could help in the diagnosis and treatment of various diseases.

Image mapping of untracked free-hand endoscopic views to an ultrasound image-constructed 3D placenta model.

BACKGROUND: This study presents a tracker-less image-mapping framework for surgical navigation motivated by the clinical need for intuitive visual guidance during minimally invasive fetoscopic surgery. METHODS: A navigation framework mapping 2D endoscopic vision to a 3D ultrasound image model is proposed. This maps an endoscopic image onto a 3D placenta model through a one-time ultrasound image-based localization method followed by a series of concurrent image alignments and texture mapping of the untracked endoscopic video stream. RESULTS: The mean absolute error of our ultrasound image-based localization method was (1.63 mm, 0.93°). The simulation analysis reveals an upper bound mapping performance with a mean error of 1.53 mm. In a phantom experiment, the overall mapping performance is close to this accuracy and achieves a mean absolute error of 2 mm, thereby supporting the feasibility of this method. CONCLUSION: This novel integration of intraoperative visual guidance has potential contributions to innovative fusions of image guidance techniques for effective navigation in minimally invasive fetoscopic surgery.

Ultrahigh sensitivity endoscopic camera using a new CMOS image sensor: providing with clear images under low illumination in addition to fluorescent images.

BACKGROUND: We developed a new ultrahigh-sensitive CMOS camera using a specific sensor that has a wide range of spectral sensitivity characteristics. The objective of this study is to present our updated endoscopic technology that has successfully integrated two innovative functions; ultrasensitive imaging as well as advanced fluorescent viewing. METHODS: Two different experiments were conducted. One was carried out to evaluate the function of the ultrahigh-sensitive camera. The other was to test the availability of the newly developed sensor and its performance as a fluorescence endoscope. In both studies, the distance from the endoscopic tip to the target was varied and those endoscopic images in each setting were taken for further comparison. RESULTS: In the first experiment, the 3-CCD camera failed to display the clear images under low illumination, and the target was hardly seen. In contrast, the CMOS camera was able to display the targets regardless of the camera-target distance under low illumination. Under high illumination, imaging quality given by both cameras was quite alike. In the second experiment as a fluorescence endoscope, the CMOS camera was capable of clearly showing the fluorescent-activated organs. CONCLUSIONS: The ultrahigh sensitivity CMOS HD endoscopic camera is expected to provide us with clear images under low illumination in addition to the fluorescent images under high illumination in the field of laparoscopic surgery.

Artificial nutrition in old patients dying of dementia.

PURPOSE OF REVIEW: The aim of the review is to show main and recent evidence on and tendencies about artificial nutrition in advanced dementia. RECENT FINDINGS: Several studies in the last decade had been performed to provide evidence that supports lack of benefits or improvements in many aspects about caring of the elderly with advanced dementia. In spite of the evidence, we find an increased number of patients still submitted to artificial nutrition. There is high prevalence of misperceptions and misbeliefs about artificial nutrition among healthcare professionals in this scenario. Hand feeding for these patients is offered as an alternative arrangement, which may be characterized as dilemma. The decision-making process in artificial nutrition is considered as a difficult, complex and distressful issue, which addresses new strategies for improvement. SUMMARY: Despite the lack of evidence of benefits, the use of artificial nutrition remains commonplace in advanced dementia. Patient's wishes and family values should be taken into account in the decision-making process, as well as legal and ethical issues. Communication skills and acknowledgment of recent evidence are essential in decision-making in order to achieve the patient's best interests. Educational strategies and randomized prospective studies concerned about dying patients with advanced dementia are required.

A beam-splitter-type 3-D endoscope for front view and front-diagonal view images.

PURPOSE: In endoscopic surgery, surgeons must manipulate an endoscope inside the body cavity to observe a large field-of-view while estimating the distance between surgical instruments and the affected area by reference to the size or motion of the surgical instruments in 2-D endoscopic images on a monitor. Therefore, there is a risk of the endoscope or surgical instruments physically damaging body tissues. To overcome this problem, we developed a Ø7- mm 3-D endoscope that can switch between providing front and front-diagonal view 3-D images by simply rotating its sleeves. METHODS: This 3-D endoscope consists of a conventional 3-D endoscope and an outer and inner sleeve with a beam splitter and polarization plates. The beam splitter was used for visualizing both the front and front-diagonal view and was set at 25° to the outer sleeve's distal end in order to eliminate a blind spot common to both views. Polarization plates were used to avoid overlap of the two views. We measured signal-to-noise ratio (SNR), sharpness, chromatic aberration (CA), and viewing angle of this 3-D endoscope and evaluated its feasibility in vivo. RESULTS: Compared to the conventional 3-D endoscope, SNR and sharpness of this 3-D endoscope decreased by 20 and 7 %, respectively. No significant difference was found in CA. The viewing angle for both the front and front-diagonal views was about 50°. In the in vivo experiment, this 3-D endoscope can provide clear 3-D images of both views by simply rotating its inner sleeve. CONCLUSIONS: The developed 3-D endoscope can provide the front and front-diagonal view by simply rotating the inner sleeve, therefore the risk of damage to fragile body tissues can be significantly decreased.

3-D endoscope using a single CCD camera and pneumatic vibration mechanism.

BACKGROUND: During endoscopic surgical procedures, surgeons must manipulate an endoscope inside the body cavity to observe a surgical area while estimating the distance between that area and the surgical instruments by reference to a monitor on which the movement and size of the surgical instruments are displayed in 2-D endoscopic images. Therefore, there is a risk of the endoscope or instruments physically damaging body tissues. To overcome this problem, we developed a Ø5-mm, 3-D endoscope using a single 1/10-inch CCD camera and pneumatic vibration mechanism. METHODS: The 3-D endoscope proposed in this paper consists of an outer and inner sleeve, a 1/10-inch CCD camera attached to its distal end, and a pneumatic vibration mechanism attached to its proximal end. This endoscope can acquire left and right endoscopic images for stereovision in synchrony with the periodical motion generated by the vibration mechanism. We measured the displacement at the proximal and distal end of the 3-D endoscope simultaneously, and evaluated the feasibility of its use in vivo. RESULTS: The displacement at the distal end of the endoscope to which the CCD camera is attached was approximately ±0.25 mm. The timing when the displacement of the CCD camera was at maximal amplitude coincided with the timing when the displacement of its proximal end was at maximal amplitude. In the in vivo experiment, this 3-D endoscope can provide clear 3-D images of the surgical area. CONCLUSIONS: The developed 3-D endoscope that uses a single CCD camera and pneumatic vibration mechanism can successfully visualize internal organs inside the body even though the CCD camera is moved by the vibration. Therefore, the risk of damage to fragile body tissues can be significantly decreased.