Wound healing in db/db mice with type 2 diabetes using non-contact exposure with an argon non-thermal atmospheric pressure plasma jet device.

A non-thermal atmospheric pressure plasma jet (APPJ) may stimulate cells and tissues or result in cell death depending on the intensity of plasma at the target; therefore, we herein investigated the effects of non-thermal plasma under non-contact conditions on the healing of full-thickness wounds in diabetic mice (DM+ group) and normal mice (DM- group). A hydrogen peroxide colorimetric method and high performance liquid chromatography showed that APPJ produced low amounts of reactive oxygen and nitrogen species. Ten-week-old male C57BL/6j mice with normal blood glucose levels (DM- group) and 10-week-old male C57BLKS/J Iar-+Leprdb/+Leprdb mice (DM+ group) received two full-thickness cutaneous wounds (4 mm in diameter) on both sides of the dorsum. Wounds were treated with or without the plasma jet or argon gas for 1 minute and were then covered with a hydrocolloid dressing (Hydrocolloid), according to which mice were divided into the following groups: DM+Plasma, DM+Argon, DM+Hydrocolloid, DM-Plasma, DM-Argon, and DM-Hydrocolloid. Exudate weights, wound areas, and wound area ratios were recorded every day. Hematoxylin and eosin staining was performed to assess re-epithelialization and α-SMA immunohistological staining to evaluate the formation of new blood vessels. Non-thermal plasma under non-contact conditions reduced the production of exudate. Exudate weights were smaller in the DM+Plasma group than in the DM+Hydrocolloid and DM+Argon groups. The wound area ratio was smaller for plasma-treated wounds, and was also smaller in the DM+Plasma group than in the DM+Hydrocolloid and DM+Argon groups on days 1-21 (p<0.01). Wound areas were smaller in the DM-Plasma group than in the DM-Argon group until day 14 and differences were significant on days 1-5 (p<0.01). The percentage of re-epithelialization was significantly higher in the DM+Plasma group than in the DM+Argon and DM+Hydrocolloid groups (p<0.01). The number of new blood vessels that had formed by day 7 was significantly higher in the DM+Plasma group than in the DM+Hydrocolloid and DM+Argon groups (p<0.05). These results indicate that treatment with the current non-thermal plasma APPJ device under non-contact conditions accelerated wound healing in diabetic mice.

Correlation Between Bacteria Count Using a Rapid Bacterium Counting System and Changes in Wound Area on Diabetic Foot Ulcers in Indonesia: A Prospective Study.

This study aimed to clarify the correlation between changes in bacterial number and wound area in diabetic foot ulcers (DFUs). This study used a prospective longitudinal cohort design. A total of 30 participants met the inclusion criteria. Changes in bacterial number and wound area were evaluated weekly until week 4. The chi-square test indicated no significant correlation between biofilm formation and wound area (p = 0.32) but a significant correlation between bacterial count and wound area (p = 0.05). Logistic regression analysis showed a significant correlation between bacterial count and changes in wound area (odds ratio, 0.60; 95% confidence interval [CI], 0.372-0.997; p = 0.04). The receiver operating characteristic analysis showed an area under the curve of 0.660 (95% CI, 0.52-0.79; p = 0.03) with a sensitivity of 97% and specificity of 88%. The present prospective longitudinal cohort study demonstrated the correlation between bacterial count changes and wound area in DFUs. Our results suggest that changes in bacterial count could help wound healing evaluations.

Development of a Family Support Scale for Diet Therapy for Male Workers with type 2 diabetes.

AIM: Dietary self-care for patients with type 2 diabetes can be improved with family support. The purpose of this study was to develop a scale to assess family support for diet therapy for male workers with type 2 diabetes and to examine its reliability and validity. METHODS: In this cross-sectional study, we collected data from 110 Japanese male workers with type 2 diabetes. Data were analyzed using exploratory factor analysis, reliability testing, and validity testing. RESULTS: The resultant Family Support Scale for Diet Therapy for Male Workers (FSS-DMW) with type 2 diabetes consisted of 31 items and a six-factor structure. The six factors explained 72.9% of the variance, and Cronbach's alpha for the total scale was .964. The scale correlated as expected with the Social Support Scale for Chronic Illness and the dietary subscale of the Japanese version of the Summary of Diabetes Self-Care Activities Measure. CONCLUSION: The FSS-DMW is a reliable and valid measure which can be used to assess family support for diet therapy for male workers with type 2 diabetes and has the potential to be used as a clinical instrument for family guidance.

Comparison of normal hindlimb lymphatic systems in rats with detours present after lymphatic flow blockage.

In the present study, we aimed to identify the normal hindlimb lymphatic systems in rats and compare them with the detours after lymphatic flow blockage. The lymphatic systems of the hindlimbs of normal rats were investigated via lymphography using a near-infrared fluorescence imaging system. The lymphatic vessels were stained using Evans Blue. The lymphatic flow was blocked through lymphatic vessel ligation combined with inguinal and popliteal lymph node dissection. Detours that appeared after 30 days were visualized using lymphography and immunostaining with anti-podoplanin antibodies. Three main results were obtained in the present study. First, the deep medial system, the superficial medial system, a connection between the superficial and deep medial lymphatic systems, and the superficial lateral system, were elucidated. Second, three types of detours, namely the detour of the lateral abdomen, the detour to the lymphatic vessel near the midline of the abdomen, and the detour to the contralateral inguinal lymph node, were identified after lymphatic flow blockage. Lastly, detours were located in the fatty layer above the panniculus carnosus muscle and their lumina were wide. The histology suggested that the detour was a pre-collecting lymphatic vessel. Lymphatic routes in the rat hindlimbs after lymphatic flow blockage were different from those of the normal rat lymphatic system. It was suggested that the detour is a pre-collecting lymphatic vessel and that encouraging its development may be a new method of simple lymphatic drainage.

Influences of lower limb edema on daily lives of elderly individuals in an elderly day care center.

AIM: The purpose of this study is to describe the influences of lower limb edema on the daily lives of elderly individuals in elderly day care to describe the necessity of care for lower limb edema. METHODS: Semi-structured interviews based on a quality of life questionnaire for limb lymphedema were conducted. Two types of text mining analysis methods were used: a frequent word analysis and a content analysis. The edema severity was graded on a scale of 0 to 3, and the sum of the numerical values of the grades for each person was defined as the pitting score. RESULTS: The seven participants had a mean age of 83.4 ± 4.6 years (mean ± SD). The pitting scores ranged from 1 to 25 in the participants. The words "think" (389 times), "walk" (136 times), and "put on" (135 times) were extracted frequently. The content analysis focused on the words "walk" and "put on." The participants complained of difficulty walking, pain, and numbness when walking, weakness of their lower limbs, difficulty putting on shoes, restrictions on shoe types, and difficulty finding shoes. CONCLUSIONS: These results demonstrate that elderly individuals experienced troubles during their daily lives caused by lower limb edema, which highlights the necessity of symptom management. Active interventions for edema by nurses are necessary to improve quality of life in elderly individuals.

Pre-collecting lymphatic vessels form detours following obstruction of lymphatic flow and function as collecting lymphatic vessels.

BACKGROUND: Previously, we showed that lymphatic vessels (LVs) formed detours after lymphatic obstruction, contributing to preventing lymphedema. In this study, we developed detours using lymphatic ligation in mice and we identified the detours histologically. METHODS AND RESULTS: Under anesthesia, both hindlimbs in mice were subcutaneously injected with Evans blue dye to detect LVs. We tied the right collecting LV on the abdomen that passes through the inguinal lymph node (LN) at two points. The right and left sides comprised the operation and sham operation sides, respectively. Lymphography was performed to investigate the lymph flow after lymphatic ligation until day 30, using a near-infrared fluorescence imaging system. Anti-podoplanin antibody and 5-ethynyl-2'-deoxyuridine (EdU) were used to detect LVs and lymphangiogenesis. Within 30 days, detours had developed in 62.5% of the mice. Detours observed between two ligation sites were enlarged and irregular in shape. Podoplanin+ LVs, which were located in the subcutaneous tissue of the upper panniculus carnosus muscle, connected to collecting LVs at the upper portion from the cranial ligation site and at the lower portion from the caudal ligation site. EdU+ cells were not observed in these detours. The sham operation side showed normal lymph flow and did not show enlarged pre-collecting LVs until day 30. CONCLUSIONS: Detours after lymphatic ligation were formed not by lymphangiogenesis but through an enlargement of pre-collecting LVs that functioned as collecting LVs after lymphatic ligation. Further studies are required to explore the developmental mechanism of the lymphatic detour for treatment and effective care of lymphedema in humans.

Use of 2 Types of Air-cell Mattresses for Pressure Ulcer Prevention and Comfort Among Patients With Advanced-stage Cancer Receiving Palliative Care: An Interventional Study.

Patients with advanced- or terminal-stage cancer and persons receiving palliative care are at high risk for pressure ulcers (PUs). PURPOSE: The purpose of this study was to examine the rate of PU development and levels of comfort of a dual-fit, air-cell mattress compared with an alternating, 2-layer overlay air-cell mattress in patients with advanced- or terminal-stage cancer receiving palliative care. METHODS: From January 2011 to December 2013, hospitalized patients with advanced- or terminal-stage cancer who were referred to a palliative care team, at least 20 years of age, able to communicate, experiencing pain, and did not have a PU were recruited to participate. Patients who consented were alternately placed on the intervention (dual-fit, air-cell) or control (2-layer air) mattress until hospital discharge or death. Demographic and clinical data, pain scores, performance status, Palliative Performance Scale scores, Braden Scale scores, tissue interface pressure, and comfort were assessed via interview using closed-end questions. If a PU developed, clinical characteristics were assessed using DESIGN-R. Descriptive statistics and the Mann-Whitney U, chi-squared, and Fisher's exact tests were used to analyze the data. RESULTS: Of the 123 eligible patients, 73 were randomized and 52 completed the study (23 intervention patients, median age 63 [range 27-80] years; and 29 control group patients, median age 61.0 [range 27-82] years). Mattresses were used a median of 17 (range 4-113) days in the intervention group and a median of 32 (range 3-270) days in the control group. The incidence of PUs did not significantly differ between the 2 groups (13% in the intervention and 17.2% in the control group). Interface pressures were significantly higher in the intervention group (27.0 mm Hg vs. 24.3 mm Hg). Comfort scores at rest were significantly better in the intervention than in the control group (sinking into bed [3 vs. 14, respectively]; slipping on bed [o vs. 16, respectively]; and feel pressure of air cell [2 vs. 14, respectively]), as were scores with movement (instability during movement [4 vs. 18, respectively] and feeling of floating of the buttocks [6 vs. 21, respectively]) (P <.05). CONCLUSION: Dual-fit, air-cell mattresses may help prevent PUs and improve comfort at rest and during activity among patients with end-stage cancer receiving palliative care. Further research regarding mattress selection protocols for this patient population is warranted.

Investigation of effects of urethane foam mattress hardness on skin and soft tissue deformation in the prone position using magnetic resonance imaging.

AIM: In operating rooms, the occurrence of pressure ulcers caused by being in the prone position is the highest among that of pressure ulcers caused by being in other surgical positions. Thus, we investigated effects of hardness and shape of urethane foam mattresses for preventing pressure ulcers during surgery performed with patients in the prone position. We aimed to elucidate how mattresses of variable hardness and shapes affect compression and displacement of the skin and soft tissues with external force in the prone position. MATERIAL AND METHODS: We assessed effects of two shapes [rectangular cube (RC) and trapezoid cube (TC)] and four degrees of hardness (50, 87.5, 175, and 262.5 N) in each shape. We performed magnetic resonance imaging (MRI) of the iliac crests with external force while participants reclined in the prone position on eight different mattresses. RESULTS: Compression of the skin and soft tissue was significantly higher with 87.5-, 175-, and 262.5-N mattresses than that with 50-N mattresses. Skin and soft tissue displacement was higher with TC mattress than that with RC mattress, and the extent of skin surface and internal soft tissue displacement was different. CONCLUSIONS: Compression of the skin and soft tissue depends on mattress hardness; however, a threshold value (175 N) for hardness exists, above which no further changes in the parameters were observed. Skin and soft tissue displacement does not depend on mattress hardness, but rather on its shape. Furthermore, mattress inclination increases skin surface displacement.

Comparison of ceramide retention in the stratum corneum between dry skin and normal skin using animal model with fluorescent imaging method.

BACKGROUND/PURPOSE: Skin care via moisturization compensates for the lack of skin barrier function. However, moisturizer application methods are not clearly decided. Here, we focused on and examined the retention of externally applied ceramide in the stratum corneum (SC) using fluorescent imaging method. This study aimed to compare ceramide retention in the SC between normal skin and dry skin using an animal model. METHODS: Nine-week-old Sprague-Dawley rats were divided into two groups: normal skin and dry skin model. The dry skin model group was treated with acetone-diethyl ether solution. A fluorescently labeled ceramide solution was prepared and applied to rats' back skin. Skin samples were taken at 0 minute and 12 hours after ceramide application. Fluorescently labeled ceramide was evaluated and observed under a microscope. RESULTS: The intensity of externally applied ceramide in the normal skin group showed no significant change from 0 minute to 12 hours after application. In contrast, in the dry skin model group, the intensity of externally applied ceramide increased significantly from 0 minute to 12 hours after application. CONCLUSION: Our findings demonstrate that the externally applied ceramide penetrated the SC of dry skin more than that of normal skin.

Near-Infrared Fluorescence Imaging Directly Visualizes Lymphatic Drainage Pathways and Connections between Superficial and Deep Lymphatic Systems in the Mouse Hindlimb.

Since lymphedema rarely develops in the mouse hindlimb, the underlying mechanisms remain unclear. We herein investigated the resolution of chronic hindlimb lymphedema in mice using a Near-Infrared Fluorescence (NIRF) imaging system. Nineteen 7-28-week-old BALB/c male and female mice were injected with two dyes for lymphography and dissection. Lymphadenectomy was performed on six male mice to completely obstruct lymph flow in the hindlimb. Edematous changes in both hindlimbs were compared until 60 days after surgery. The NIRF imaging system detected three lymphatic collecting systems in the mouse hindlimb: superficial lateral, superficial medial, and deep medial. It also showed connections between the superficial and deep lymphatic systems in the inguinal region. Lymphadenectomy of the iliac, inguinal, and popliteal lymph nodes caused edematous changes. However, lymph flow in these operated areas restarted within 60 days and the severity of lymphedema appeared to be low. NIRF imaging showed that the deep medial system and a connection between the superficial and deep lymphatic systems in the inguinal region drain lymph from the hindlimb. This is the one reasons why lymphedema does not develop in the mouse hindlimb. The stable obstruction of lymph flow in these three systems is desired to develop chronic lymphedema.

Lymph Drainage During Wound Healing in a Hindlimb Lymphedema Mouse Model.

BACKGROUND: Although lymphedematous skin exhibits delayed wound healing, little is known about lymph drainage during wound healing. We investigated the wound healing process in the presence of lymphatic dysfunction. METHODS AND RESULTS: The right inguinal lymph nodes (iLNs) and the surrounding tissue were excised in each mouse (the operation side), and a sham operation was performed in the left hindlimb (the control side). The next day, full-thickness wounds were made on both hindlimbs. The right hindlimb exhibited acute edema until day 3; however, it started to improve after day 4, and the wound area and epithelialization ratio were similar on both sides. Indocyanine green (ICG) was injected into both hindlimbs to observe lymph flow. On the operation side, ICG leaked out of the surgical site or remained at the injection site until day 2. Some lymph flow toward the existing lymph vessels was seen on day 3, and on day 10, lymph flow toward the axial LNs was detected on the operation side in all mice. On the operation side, the number of dermal lymph vessels was significantly increased on days 3 and 15. The dermal lymph vessel area of the peripheral wound was significantly smaller on the operation side. CONCLUSIONS: In a hindlimb lymphedema mouse model, lymph transiently accumulated in subcutaneous tissue, and then was gradually absorbed by the existing lymph vessels. The increase in the number of lymph vessels contributes to lymph drainage during wound healing. Acute lymphedema because of transient lymphatic dysfunction has little effect on wound healing.

Relationship between maceration and wound healing on diabetic foot ulcers in Indonesia: a prospective study.

The aim of this study was to clarify the relationship between maceration and wound healing. A prospective longitudinal design was used in this study. The wound condition determined the type of dressings used and the dressing change frequency. A total of 62 participants with diabetic foot ulcers (70 wounds) were divided into two groups: non-macerated (n = 52) and macerated wounds (n = 18). Each group was evaluated weekly using the Bates-Jensen Wound Assessment Tool, with follow-ups until week 4. The Mann-Whitney U test showed that the changes in the wound area in week 1 were faster in the non-macerated group than the macerated group (P = 0·02). The Pearson correlation analysis showed a moderate correlation between maceration and wound healing from enrolment until week 4 (P = 0·002). After week 4, the Kaplan-Meier analysis showed that the non-macerated wounds healed significantly faster than the macerated wounds (log-rank test = 19·378, P = 0·000). The Cox regression analysis confirmed that maceration was a significant and independent predictor of wound healing in this study (adjusted hazard ratio, 0·324; 95% CI, 0·131-0·799; P = 0·014). The results of this study demonstrated that there is a relationship between maceration and wound healing. Changes in the wound area can help predict the healing of wounds with maceration in clinical settings.

Effectiveness of Changing the Application of Japanese Honey to a Hydrocolloid Dressing in Between the Inflammatory and Proliferative Phases on Cutaneous Wound Healing in Male Mice.

INTRODUCTION: The aim of this study was to investigate the effects of changing the application of Japanese honey to a hydrocolloid dressing (HCD) in between the inflammatory and proliferative phases on cutaneous wound healing in 8-week-old, BALB/cCrSlc male mice. MATERIALS AND METHODS: Mice were divided into 4 groups: acacia honey followed by a HCD, buckwheat flour honey followed by a HCD, Chinese milk vetch honey followed by a HCD, and a HCD alone (control group). All mice received 2 full-thickness wounds on both sides of the dorsum using a Disposable Biopsy Punch. The wounds of the control group were covered with a HCD, whereas wounds in the other groups were treated with 0.1 mL of the relevant type of honey until day 3 post-wound and then were covered with a HCD from days 4 to 14. RESULTS: In the experimental groups, the wound area ratio was significantly smaller in the inflammatory phase but significantly larger in the proliferative phase. Reepithelialization, collagen deposition, and wound contraction were significantly delayed compared with those in the control group. DISCUSSION: The re-expansion of the wounds in the proliferative phase could not be prevented, and reepithelialization, collagen deposition, and wound contraction were delayed compared with those upon the use of a HCD. CONCLUSION: The study's authors concluded that these methods do not promote cutaneous wound healing better than the use of a HCD alone.

Differences in the working pattern among wound, ostomy, and continence nurses with and without conducting the specified medical act: a multicenter time and motion study.

BACKGROUND: To overcome the shortage of medical care delivery in the rapidly aging Japanese society, the Ministry of Health, Labour and Welfare in 2010 started to train the nurses to be able to conduct the specified medical acts. The Japanese Nursing Association conducted the educational program to train the wound, ostomy, and continence nurses for the specified medical act of wound care. However, the difference between wound, ostomy, and continence nurses who conducted the medical act and those who did not was not clear. The aim of this study was to determine how trained wound, ostomy, and continence nurses spend their time during their entire shift in an acute hospital setting. METHODS: In this prospective observational study, we selected those wound, ostomy, and continence nurses who received advanced training in the wound management program (T-WN) in 2011-2012. Wound, ostomy, and continence nurses who did not receive the training (N-WN) were also recruited as controls. We conducted a time and motion study during subject's day shifts for 1 week. We calculated the time spent on tasks based on a task classification code that was created to facilitate a two-group comparison. RESULTS: Six T-WNs and five N-WNs were our analysis subjects. T-WNs spent significantly more time on direct care than did N-WNs (p = 0.00). Moreover, in the sub-categories s of direct care, T-WN spent significantly more time on "treatment" than did N-WN (p = 0.01). T-WN spent significantly more time on treatment with (p = 0.03) or without (p = 0.01) physicians than did N-WN. In the treatment activities, T-WN performed significantly more time on foot care (p = 0.01), wound cleansing (p = 0.01) and conservative sharp wound debridement (p = 0.01) than did N-WN. Frequencies of direct care interventions for the patients was significantly different between T-WN and N-WN (p = 0.04). CONCLUSIONS: T-WNs frequently engaged in direct care provided treatment for patients with chronic wounds.

Dermal Structure in Lymphedema Patients with History of Acute Dermatolymphangioadenitis Evaluated by Histogram Analysis of Ultrasonography Findings: A Case-Control Study.

BACKGROUND: Acute dermatolymphangioadenitis (ADLA) is a risk factor for increasing of edema and worsening severity. Reducing ADLA frequency is an important objective of lymphedema management because ADLA episodes are strongly associated with poor quality of life. Lymphedema changes dermal and subcutaneous structure, favoring ADLA; ADLA recurrence may be caused by structural change of the dermis. However, the structure of the skin following ADLA episodes has not been studied in depth. The aim of this study was to examine changes in the skin after episodes of ADLA in breast cancer-related lymphedema (BCRL) using histogram analysis of ultrasonography findings. METHODS AND RESULTS: This was a case-control study with matching for the duration of lymphedema. We compared 10 limbs (5 BCRL patients, Cases) with a history of ADLA and 14 limbs (7 BCRL patients, Controls) without. Ultrasonography was performed using a 20-MHz probe, and measurements were made at a site 10 cm proximal to the ulnar styloid process. We compared "skewness" of the images in the dermis from the histogram analysis. This study was approved by the Ethics Committee of Kanazawa University. Skewness was significantly different between the affected and unaffected limbs (p = 0.02). Cases showed a positive value (median 0.74, range -0.18 to 1.26), whereas Controls showed a negative value (median -0.21, range -0.45 to 0.31). CONCLUSIONS: Episodes of ADLA changed the distribution of echogenicity on imaging, which indicates a change in the collagen fibers in the dermis. These findings might contribute to improving the management of lymphedema and prevention of recurrent ADLA.

Associations between the treatments and outcomes of patients with upper and lower lymphoedema in Japan: a cross-sectional observational study.

BACKGROUND: Lymphoedema is not currently curable, and it is important that symptoms are alleviated by appropriate treatment. Treatments aim to delay the progression of swelling and to improve patients' quality of life (QOL). There are many objective and subjective outcomes of lymphoedema, but it is unclear which outcomes should be used to evaluate lymphoedema treatments. OBJECTIVE: This study aimed to examine the associations between lymphoedema treatments and outcomes. DESIGN: A cross-sectional observational study. SETTING: Lymphoedema outpatient clinics in Japan. PARTICIPANTS: A total of 170 patients with lymphoedema were recruited from four outpatient clinics. METHODS: The data were collected from medical records, physical assessments, and interviews. The following objective outcomes were evaluated: circumference measurements, Stemmer sign, cellulitis, and skin hardness. The following subjective outcomes were evaluated: satisfaction with treatment, subjective symptoms, EuroQol-5 dimensions, and a quality of life measure for limb lymphoedema (LYMQOL). Multiple regression analysis was performed to examine the associations between lymphoedema treatments and their outcomes. RESULTS: Secondary lymphoedema was present in 158 patients (92.9%), and 91 patients (53.5%) had lower lymphoedema. The patients using compression garments were 2.63 times more likely to have a positive Stemmer sign and 2.85 times more likely to be satisfied with their treatment than those who were not using compression garments (p=0.02 for Stemmer sign, p<0.01 for satisfaction). The patients treated with simple lymphatic drainage (SLD) exhibited a 2.26-fold greater level of satisfaction with treatment than those not receiving this treatment (p<0.01). The patients treated with complete decongestive therapy (CDT) had higher QOL than did those not receiving this therapy (ß=-0.19, p=0.04). CONCLUSIONS: The progression of swelling can be evaluated using the Stemmer sign with regard to compression therapy. The degree of satisfaction can be evaluated as the patient's satisfaction with their lymphoedema regarding compression garments and SLD, and improvements in QOL can be evaluated using the LYMQOL with regard to CDT. The subjective outcomes were not associated with every lymphoedema treatment in this study, and the effectiveness of lymphoedema treatment can be evaluated using several different outcomes.

Microclimate and development of pressure ulcers and superficial skin changes.

This study aims to evaluate the microclimate and development of pressure ulcers and superficial skin changes. A prospective cohort study was conducted in an acute care ward in Indonesia. Risk factors for pressure ulcers and superficial skin changes were identified based on the Bergstrom Braden conceptual model. Microclimate data were collected every 3 days for 15 days while the development of pressure ulcers and superficial skin changes was observed every day. Pressure ulcers and superficial skin changes were developed in 20 of the 71 participants. Total mean difference in skin temperature was higher for patients with pressure ulcers and superficial skin changes (0·9 ± 0·6°C) compared with controls (0·6 ± 0·8°C) (P = 0·071). Binary logistic regression predictor values for pressure ulcers and superficial skin changes were 0·111 for type of sheet and 0·347 for Braden Scale results. In conclusion, difference in skin temperature seems to be a predictor for pressure ulcer development and superficial skin changes, while synthetic fibre sheets are able to maintain a beneficial microclimate.

The nature of sleep in 10 bedridden elderly patients with disorders of consciousness in a Japanese hospital.

No previous study has satisfactorily clarified the nature of sleep in elderly bedridden people with disorders of consciousness (DOC). The objective of the present study was to clarify the sleep states of 10 elderly bedridden patients with DOC in a Japanese hospital to facilitate provision of evidence-based nursing care and appropriate adjustment of patients' environments. Nocturnal polysomnography recordings were analyzed according to the standard scoring criteria, and the patients' sleep stages and quality were investigated. Of the 10 patients, 9 showed slow wave sleep (SWS), 4 showed very high values for sleep efficiency (96-100%), and in 3 of these patients, the percentage of SWS was ≥ 20%. Furthermore, three of these four patients had 200 or more changes in sleep stage. Although the mechanism is unknown, the amount of SWS combined with the value of sleep efficiency suggests that the quality of sleep is poor in elderly bedridden patients with DOC. Further study is needed to determine better indicators of good sleep in this population.

Assessment of the interstitial fluid in the subcutaneous tissue of healthy adults using ultrasonography.

OBJECTIVE: Lymphoedema involves swelling, especially in the subcutaneous tissues. For lymphoedema management to be successful, it is necessary to remove the interstitial fluid. Subcutaneous echogenicity may be associated with interstitial fluid, but echogenicity is not an indicator for the evaluation of management because we do not directly compare echogenicity with the interstitial fluid. We aimed to identify an outcome indicator for the evaluation of interstitial fluid using ultrasonography. We assessed the correlation between echogenicity and transverse relaxation rate (R2) on magnetic resonance imaging. METHODS: This was an observational study. Healthy adults with leg swelling after activity for >8 h were recruited. The legs of 13 women were evaluated using ultrasonography, magnetic resonance imaging and measurements of the limb circumference before and after an intervention to reduce the swelling. RESULTS: Echogenicity in the oedema group was greater than that of the controls. Echogenicity decreased with reductions in oedema. The range of the strongest correlations with the changes in R2 occurred at echogenicity values of 48-144 (Pearson's correlation coefficient: r = -0.63 and p < 0.01). Thus, it was possible to evaluate the interstitial fluid using echogenicity. CONCLUSION: The outcome indicators for the evaluation of interstitial fluid using ultrasonography were echogenicities in the range of 48-144, and these values were valid for assessing the interstitial fluid in the subcutaneous tissue.

Non-invasive monitoring of core body temperature rhythms over 72 h in 10 bedridden elderly patients with disorders of consciousness in a Japanese hospital: a pilot study.

The purpose of this study was to elucidate the body core temperature rhythms of bedridden elderly patients with disorders of consciousness (DOC) in a Japanese hospital using a simple, non-invasive, deep-body thermometer. We measured body core temperature on the surface of abdomen in 10 bedridden elderly patients with DOC continuously over 72 h. A non-heated core body temperature thermometer was used. The cycle of the body core temperature rhythm was initially derived by using the least squares method. Then, based on that rhythm, the mean, amplitude, and times of day of the highest and lowest body temperatures during the optimum cycle were determined using the cosinor method. We found a 24-h cycle in seven of the 10 patients. One patient had a 6-h, one a 12-h, and one a 63-h cycle. The mean value of the cosine curve in the respective optimum cycles was 36.48 ± 0.34 °C, and the amplitude was 0.22 ± 0.09 °C. Of the seven subjects with 24-h cycles, the highest body temperature occurred between 12:58 and 14:44 h in four. In addition to 24-h cycles of core temperature rhythm, short cycles of 12 and 6-h and a long cycle of 63-h were seen. In order to understand the temperature rhythms of bedridden elderly patients with DOC, it is necessary to monitor their core body temperatures, ideally using a simple, non-invasive device. In the future, it will be important to investigate the relationship of the core temperature rhythm to nursing care and living environment.