Comparing the physical performance of liquid barrier films.

BACKGROUND: Barrier films have been used for many years to protect skin from the damaging effects of excessive moisture and mechanical injury. The performance characteristics important for these protective effects are mainly product durability and its ability to reduce the force of adhesive removal. Additionally, the moisture vapor transmission rate through the film needs to be high enough that maceration is prevented. The current study was undertaken to investigate various physical performance characteristics of six commercially available barrier films. MATERIALS AND METHODS: Several bench tests were used to simulate performance features of the barriers on skin including barrier durability, breathability (moisture vapor permeability), and the effect on adhesive dressing force of removal. RESULTS: Results indicated that barrier films did not perform equivalently. However, Cavilon™ No Sting Barrier Film (NSB) was shown to have significantly greater durability in the barrier integrity test than all other barriers tested and was tied for highest breathability and highest reduction in peel force from steel. No other tested barrier film performed as consistently across the different tests. CONCLUSION: These results may provide mechanistic understanding of how barriers such as NSB may clinically assist with the prevention of adhesive- and moisture-related skin damage.

Cerebral small vessel disease genomics and its implications across the lifespan.

White matter hyperintensities (WMH) are the most common brain-imaging feature of cerebral small vessel disease (SVD), hypertension being the main known risk factor. Here, we identify 27 genome-wide loci for WMH-volume in a cohort of 50,970 older individuals, accounting for modification/confounding by hypertension. Aggregated WMH risk variants were associated with altered white matter integrity (p = 2.5×10-7) in brain images from 1,738 young healthy adults, providing insight into the lifetime impact of SVD genetic risk. Mendelian randomization suggested causal association of increasing WMH-volume with stroke, Alzheimer-type dementia, and of increasing blood pressure (BP) with larger WMH-volume, notably also in persons without clinical hypertension. Transcriptome-wide colocalization analyses showed association of WMH-volume with expression of 39 genes, of which four encode known drug targets. Finally, we provide insight into BP-independent biological pathways underlying SVD and suggest potential for genetic stratification of high-risk individuals and for genetically-informed prioritization of drug targets for prevention trials.

CD19-positive antibody-secreting cells provide immune memory.

Long-lived antibody-secreting cells (ASCs) are critical for the maintenance of humoral immunity through the continued production of antibodies specific for previously encountered pathogen or vaccine antigens. Recent reports describing humoral immune memory have suggested the importance of long-lived CD19- bone marrow (BM) ASCs, which secrete antibodies recognizing previously encountered vaccine antigens. However, these reports do not agree upon the unique contribution of the CD19+ BM ASC subset toward humoral immunity. Here, we found both CD19+ and negative ASCs from human BM were similar in functional capacity to react to a number of vaccine antigens via ELISpot assays. The CD19+ cells were the predominant ASC population found in lymphoid tissues, and unlike the CD19- ASCs, which were found only in spleen and BM, the CD19+ ASCs were found in tonsil and blood. CD19+ ASCs from the BM, spleen, and tonsil were capable of recognizing polio vaccine antigens, indicating the CD19+ ASC cells play a novel role in long-lasting immune defense. Comparative gene expression analysis indicated CD19+ and negative BM ASCs differed significantly by only 14 distinct messenger RNAs and exhibited similar gene expression for cell cycle, autophagy, and apoptosis control necessary for long life. In addition, we show identical CDR-H3 sequences found on both BM ASC subsets, indicating a shared developmental path. Together, these results provide novel insight for the distribution, function, genetic regulation, and development of long-lived ASCs and may not only impact improved cell therapies but also enhance strategies for vaccine development.

Prospective study of outcomes of surgically treated larynx and hypopharyngeal cancers.

OBJECTIVE: To determine the morbidity and survival of surgically treated locally advanced carcinoma larynx and hypopharynx in a tertiary referral center in South India, a prospective cohort study was carried out. MATERIALS AND METHODS: Patients who had undergone laryngectomy or laryngopharyngectomy from January, 2006 to January, 2011 at our institute were prospectively studied for factors affecting morbidity tumor recurrence and disease free survival (DFS). DFS was calculated for the whole group and for the larynx and hypopharynx cancer subgroups separately, using Kaplan Meir Method and the survival differences of the larynx and hypopharynx groups and between salvage and primary surgical cases were evaluated using the Cox's regression scale . RESULTS: A total of 154 patients with ages ranging from 23 to 78 (mean 56.3 + standard deviation 9.2) were studied, which included 145 males and 9 females. Pre-operative tracheostomy and previous radiotherapy were the most significant factors contributing to post-operative morbidity. Survival difference between the larynx and hypopharynx cancers was statistically significant and the DFS was significantly affected by primary site wound infection, primary site margin and node positivity. CONCLUSION: The results of laryngectomy can be optimized by "proper case selection and morbidity risk assessment".

The Dilemma of Serum Tumor Marker (STM) Flares.

UNLABELLED: Serum tumor marker (STM) estimation is often used in clinical practice in monitoring response to treatment and as a predictor of treatment failure and relapse. However, there are pitfalls in interpretation, particularly in the immediate post treatment period, when a rise in titre could be observed, the phenomenon being termed as "flare". A literature search was done to examine this phenomenon for some of the commonly used serum tumor markers in malignancies. This phenomenon has been documented with respect to AFP, beta HCG, CEA, AC 15.3, PSA, CA 19.9 and CA 125 with or without other evidence of progression. Based on this review, a practical approach is suggested so that the clinician is not misled into changing a potentially effective treatment regime. A practical approach would be to correlate serum tumor marker values with other clinical and radiological parameters, and not to rely exclusively on serum marker values to guide therapy. KEYWORDS: serum, tumor markers, flares, STM, pseudoprogression.

Effect of caudal clonidine on emergence agitation and postoperative analgesia after sevoflurane anaesthesia in children: Randomised comparison of two doses.

BACKGROUND AND AIMS: Sevoflurane, a popular inhalational anaesthetic for children, has been associated with significant emergence agitation in the recovery phase. This study was intended to compare two doses of caudal clonidine added to ropivacaine 0.2% in order to decide on the optimal dose for prevention of sevoflurane induced emergence agitation (EA) and to get a meaningful prolongation of postoperative analgesia with minimal side effects. METHODS: Sixty-one children aged 1-7 years (American Society of Anaesthesiologists physical status I-II) received standardized general anaesthesia with inhaled sevoflurane and caudal epidural block with 0.2% ropivacaine 1 ml/kg for sub-umbilical surgeries. They were assigned randomly to two groups: (I) clonidine 1 µg/kg added to caudal ropivacaine; (II) clonidine 2 µg/kg added to caudal ropivacaine. EA and postoperative analgesia were assessed using pain/discomfort scale score and face, legs, activity, cry, consolability (FLACC) score respectively. RESULTS: EA was observed in 8 children (26.6%) in group I when compared to only 2 children (6.4%) in group II after first 15 min postoperatively. Incidences of EA at 15 min, as well as total incidence of agitation, were both significantly lower in group II when compared to group I with P < 0.05. Duration of analgesia in group I (12 [8-20] h) and group II (16 [8-20] h) was statistically comparable (P > 0.05). There was no difference in the incidence of sedation or complications. CONCLUSION: Caudal clonidine 2 µg/kg added to 0.2% ropivacaine 1 ml/kg is suggested to be the optimal dose, for prevention of EA and meaningful prolongation of postoperative analgesia with minimal side-effects.

Situs Inversus Totalis (SIT) with Hepatocellular Carcinoma (HCC): A Rare Case Report and Review of 12 Other Cases.

Hepatocellular carcinoma (HCC) is the seventh-most common malignancy in males and ninth in females with incidence of one million new cases every year. Situs inversus totalis (SIT) is a rare congenital condition, in which there is a mirror-image transposition of both the abdominal and thoracic viscera. There are very few reported cases of HCC developing in people with SIT. In this review, we present a new case of HCC with SIT, and a review of literatures published between 1983 and 2011 on it. The literatures in English were searched through PubMed and Google Scholar, while those in Japanese language were accessed through J-EAST and translated in English with the help of Google translator on 22 April 2012. There are 6 English and 6 Japanese literatures showing 12 published cases, of which 10 cases were from Japan, 1 from Taiwan and 1 from China. Our case is probably the first case in the world beyond these regions. The articles containing adequate information, such as patient age and sex, investigations, diagnosis, type of congenital anomalies and methods of surgery, were reviewed. On reviewing the literature, we observed that clinical manifestations, laboratory findings and etiology correlate well with HCC, while anomalous hepatic vascularity correlates well with SIT. The reason for high incidence of HCC with SIT in Japan is not well correlated, but may be explained by higher incidence of SIT. All varieties of hepatic resection were feasible in cases of SIT.

Laparoscopic appendicectomy in a patient with situs inversus totalis.

Situs inversus totalis (SIT) is a rare condition with a genetic predisposition, wherein organs or organ systems are transposed from their normal sites to locations on the opposite side of the body (the mirror image of normal). The syndrome may include transposition of the thoracic viscera, the abdominal viscera, or more commonly, both. The incidence has been calculated variously as 1 in 6,000-35,000 live births. We present the case of a 22-year-old man with SIT with acute appendicitis. Patient was treated with laparoscopic appendicectomy which is invaluable in both diagnosis and treatment of such patients.

Objective and perceptual analysis of outcome of voice rehabilitation after laryngectomy in an Indian tertiary referral cancer centre.

Post laryngectomy voice rehabilitation is very challenging in centres with limited resources because of cost concerns and morbidity. A study of laryngectomised voice rehabilitated patients on follow up was performed to look into overall quality of life (QOL), morbidity and voice quality. Those patients who had visited head and neck surgical outpatient department during the period of January 2008 to October 2009 were evaluated for their QOL, morbidity and voice quality, objectively and subjectively. Voice rating and QOL rating showed a distinct discrepancy which could be explained by the morbidity recorded for surgical voice restoration in the present study. Voice rehabilitation strategy after laryngectomy in a low resource setting has to take in account financial social educational background of the patient besides technical issues.

Acute small bowel obstruction due to intussusception of malignant amelonatic melanoma of the small intestine.

Malignant melanoma is a common malignancy and cutaneous melanoma showed an unusual prediction to metastasise into the small intestine. At autopsy metastatic deposits found in 50-60%, but less than 2-4% of melanoma patients diagnosed to have gastrointestinal (GI) metastasis during the disease course and 4-9% GI melanoma had unknown primary melanoma, which should be considered metastatic because primary lesion may be very small to diagnose or had regressed spontaneously. Few cases reported to have intussusception as a presenting feature. We report a case of amelanotic metastatic melanoma presented with intussusception and without known primary melanoma. The patient presented with abdominal pain, vomiting and distension. He was diagnosed as having acute intestinal obstruction as confirmed by erect abdominal x-ray. Ultrasonography showed small intestine intussusception. Emergency laparotomy revealed ilieo-ileal-type intussusception with intraluminal mass, which was resected and end-to-end anastomosis of bowel was performed. Histopathological and immunohistochemical examination of the resected specimen showed amelanotic melanoma.

Disease-specific patient reported outcome tools for systemic lupus erythematosus.

PURPOSE: Systemic lupus erythematosus (SLE) can significantly affect both health and non-health-related quality of life (HRQOL and non-HRQOL). However, of the existent published patient-reported outcome (PRO) tools, none were developed from US patients, an ethnically diverse population. Furthermore, these tools do not address men with SLE or assess non-HRQOL issues. Herein, we present the development and validation of the Lupus Patient-Reported Outcome tool (LupusPRO) and discuss its clinical utility and research value compared with other PRO tools currently available for SLE. METHODS: Beginning with a conceptual framework, items for LupusPRO were generated using feedback from women and men with SLE. The tool underwent iterations based on patient feedback and clinimetric and psychometric analyses. Validity (content, construct, and criterion) and reliability (internal consistency and test-retest) for the 44-item LupusPRO tool are presented. RESULTS: Consistent with the conceptual framework, items were identified that were related to HRQOL and non-HRQOL constructs. HRQOL domains included (1) lupus symptoms; (2) physical health (physical function, role physical); (3) pain-vitality; (4) emotional health (emotional function and role emotional); (5) body image; (6) cognition; (7) procreation; and (8) lupus medications. Non-HRQOL domains were (1) available social support and coping; (2) desires-goals; and (3) satisfaction with medical care. Internal consistency reliability (0.68-0.94), test-retest reliability (0.55-0.92), content, construct (r > 0.50 with SF-36), and criterion (r > -0.35 with disease activity) validity were fair to good. CONCLUSIONS: LupusPRO is a valid and reliable disease-targeted patient-reported health outcome tool that is generalizable to SLE patients in the United States of varied ethnic backgrounds and either gender.

Total knee arthroplasty with NexGen legacy posterior stabilized.

Total knee arthroplasty (TKA) has been primarily devised for pain free range of movement near physiological demands and even take part in sports and leisure interests along with day to day activities. Therefore we conducted an assessment on the performance of our patients after 5 years of followup. Total of 94 patients ranging from an age group of 38 to 75 years with pathologies of osteoarthritis, rheumatoid arthritis and post traumatic arthritis were subjected to implantation in our institution and included in this restrospective study. All patients were implanted with NexGen Legacy Posterior Stabilisied (LPS) system. The results have been drawn on the basis of the clinical performance and radiographic analysis with a follow up of upto 5 years. Knee society score increase from Preoperatively 60 to postoperatively 85, Knee functional score increase from preoperatively 55 to postoperatively 100. No cases of patella clunk syndrome or patella dislocation were observed in our patients. The final clinical results of operative treatment with Nexgen LPS system after 5 years of follow-up of patients corresponding to daily approved International scoring system. All of this indicates the advantages of this system comparing to its other daily analogues.

To study the incidence of organ damage and post-operative care in patients of blunt abdominal trauma with haemoperitoneum managed by laparoscopy.

BACKGROUND: Laparoscopy is safe and effective in the management of blunt trauma abdomen (BTA) with haemoperitoneum, with all benefits of minimal access surgery. AIMS: To study the incidence of organ damage and post-operative care in patients of blunt abdominal trauma with haemoperitoneum, managed by a new modality of treatment - laparoscopy. MATERIALS AND METHODS: Prospectively collected data on laparoscopy performed in patients with blunt abdominal injury, between the years 2004 to 2006, were analysed. Under general anaesthesia pneumoperitoneum was created. A 10 mm umbilical port, right-sided port in the anterior axillary line (5 mm / 10 mm), left-sided port in the anterior axillary line (5 mm / 10 mm) and an extra port were made according to the organ injury, and laparoscopy was performed and managed according to the organ injury. RESULT: Twenty-five patients had laparoscopy for blunt trauma abdomen with haemoperitoneum. Liver followed by the spleen were the most common sites of injuries. The overall failure rate was 4%. Post-operative stay and complications were much less. Laparoscopy reduced the number of negative laparotomies, with a limitation that it could not be performed in haemodynamically unstable patients. CONCLUSION: The liver and spleen are the most common organs involved in patients with blunt abdominal trauma with haemoperitoneum. Laparoscopy is safe and efficient in patients with blunt trauma abdomen with haemoperitoneum, with fast recovery and low hospital stay.

A double-blind study on analgesic effects of fentanyl combined with bupivacaine for extradural labor analgesia.

BACKGROUND: The intermittent technique of labor extradural analgesia has been showing promising results over other techniques. This study was done to assess and compare the efficacy of two different doses of fentanyl mixed with low doses of bupivacaine in intermittent labor extradural analgesia. MATERIALS AND METHODS: 90 ASA grade I-II parturients in active labor with a cervical dilatation of 3-7 cm were randomly allocated to three different groups: Group A: 10 ml bupivacaine 0.125% + fentanyl 10 µg (1 µg/ml)Group B: 10 ml bupivacaine 0.125% + fentanyl 20 µg (2 µg/ml)Group C: 10 ml bupivacaine 0.125% (the control group) All patients were preloaded with 10-15 ml/kg Lactated Ringer's solution. Labor analgesia was maintained by intermittent boluses of the drug combination. RESULTS: The mean time of the onset of analgesia was significantly lower (P<0.05) and the duration of analgesia was significantly higher (P<0.01) in Group B when compared with Groups A and C (P<0.001). Patient satisfaction was considerably better in Group B (P<0.01). However, in both groups, the progression of labor was found to be slightly more prolonged than Group C. The level of the sensory and motor block was comparable in both the groups and was at the T8-T10 level; it was comparable and the level of motor blockade (Bromage score = 0, 1) in each group was also not significant (P>0.05). CONCLUSION: The addition of fentanyl (2 µg/ml) to bupivacaine 0.125% decreases the time of the onset of analgesia and increases the duration of analgesia and level of maternal satisfaction during labor as compared to fentanyl (1 µg/ml).

The laparoscopic transperitoneal approach for irreducible inguinal hernias: Perioperative outcome in four patients.

BACKGROUND: Incarceration and strangulation are the most feared complications of inguinal hernia. Till date, incarcerated hernias have traditionally been treated by conventional open repair. Reports are now available for the feasibility of laparoscopic repair of incarcerated inguinal hernia. Here, we described our experience with the transperitoneal approach for incarcerated hernias. MATERIALS AND METHODS: Between January 2008 and May 2008, four patients were presented with a history of irreducible hernia, abdominal distention and vomiting. All the patients had right-sided inguinal hernia. Reductions of the hernia contents were not possible in any patient. The patients were treated on emergency basis with laparoscopic transabdominal preperitoneal hernia repair. Retrospective analyses of all the patients were done. RESULTS: Reduction of the bowel was achieved in all but one patient, who required the division of the internal ring on lateral side. Transperitoneal mesh repair was performed. No major complications were encountered. One patient developed seroma formation that was treated conservatively. CONCLUSION: Laparoscopic transperitoneal approach has the advantage of observation of the hernia content for a longer period of time. The division of the internal ring can be done under direct vision. Other intra-abdominal pathology and opposite side hernia can be diagnosed and treated at the same time..

Laparoscopic closure of small bowel perforation: Technique of small bowel anchoring to the abdominal wall.

INTRODUCTION: More and more complicated laparoscopic abdominal surgeries are now being performed across the world. Laparoscopic suturing of the bowel perforations is being performed by experienced surgeons. We have developed our own technique of small bowel anchoring to the abdominal wall before suturing the perforation. OUR MODIFICATION: A single stitch is taken at the corner of the perforation. The long end of the suture is retrieved by a suture retrieval needle and the small bowel is anchored to the abdominal wall. Rest of the bowel perforation is suture by the intracorporeal knot-tying technique. ADVANTAGES: Anchoring the bowel to the abdominal wall helps in fixation of the bowel to be sutured. This helps specifically for large perforation. Suturing and knot tying is relatively easy by this technique.

Tobacco chewing and female oral cavity cancer risk in Karunagappally cohort, India.

This study examined oral cancer in a cohort of 78 140 women aged 30-84 years in Karunagappally, Kerala, India, on whom baseline information was collected on lifestyle, including tobacco chewing, and sociodemographic factors during the period 1990-1997. By the end of 2005, 92 oral cancer cases were identified by the Karunagappally Cancer Registry. Poisson regression analysis of grouped data, taking into account age and income, showed that oral cancer incidence was strongly related to daily frequency of tobacco chewing (P<0.001) and was increased 9.2-fold among women chewing tobacco 10 times or more a day. The risk increased with the duration of tobacco chewing during the first 20 years of tobacco chewing. Age at starting tobacco chewing was not significantly related to oral cancer risk. This is the first cohort study of oral cancer in relation to tobacco chewing among women.

Simple technique for fabrication of shielding blocks for total body irradiation at extended treatment distances.

Techniques are being standardized in our department for total body irradiation (TBI) with six MV photons in linear accelerator for preconditioning to bone marrow transplantation (BMT). Individualized shields with low melting point alloy are to be fabricated for shielding critical organs such as lungs, kidneys etc. A method to mount diminished dimension of shields in a tray at 3.75m is designed in the department for a teletreatment distance of four meters with magna field with A simulator image taken with the patient's midplane (MP) at one meter distance is used to mark the dimensions of lung, scaled down by a factor of 3.75/4.0. These lung dimensions are reprinted from the digital simulator image for making the shield. The methodology of the technique using digitized minification in radiography is the first of its kind to be used for shield cutting in magna field radiotherapy.

A new technique for intracorporeal knot tying in laparoscopic surgery.

INTRODUCTION: Laparoscopic intracorporeal knot tying in minimally invasive surgery is an advanced skill. Mastering this skill is a difficult process with a long learning curve. Intracorporeal suturing is essential to advanced laparoscopy and is a rate-limiting step in many procedures. Many different instruments and methods have been described for laparoscopic suturing and knot tying. We have developed a new technique for laparoscopic knot tying. TECHNIQUE: The long end of the suture is held with a left-hand instrument, and the instrument is rotated for 360 degrees in a clockwise direction to make a forward-direction loop. The end of the loop is grasped with the right-hand instrument, and the other end of the suture is grasped with the left-hand instrument. The suture end, held by the left hand, is pulled though the loop and tied, thus making a half-knot of a square knot. The second half-knot is made by using the right-hand instrument with the same technique. DISCUSSION: Laparoscopic suturing and knotting is difficult to perform, especially when the angle between the working instruments is narrow and working space is limited. In all these situations, knot tying using this technique makes knotting more simple and easy to perform, especially for those who have limited experience in intracorporeal suturing and knot tying. No special instrument is required to perform knot tying with this technique.