One-Year Outcomes of Transurethral Treatment of Bladder Neck Stenosis Following Transurethral Resection of the Prostate. Results from a Large, Multicenter Series.

Purpose: To assess management and outcomes of bladder neck stenosis (BNS) post-transurethral resection of the prostate (TURP) in 12 centers. Patients and Methods: A retrospective analysis of patients who underwent transurethral BN incision for stenosis following TURP from January 2015 and January 2023 was performed. Inclusion criteria included endoscopic diagnosis of BNS associated with obstruction and/or lower urinary tract symptoms. Data are presented as median and interquartile range. Two distinct univariable logistic regression analyses were performed to identify factors associated with overall urinary incontinence and recurrent stenosis. Results: Three hundred and seventy-two men were included. 95.2% of patients developed BNS following bipolar TURP. 21.0% of patients were on an indwelling catheter before BNS incision. Bipolar electrocautery was the most commonly employed energy for incision (66.5%). Collings knife was the most commonly employed (61.2%) instrument for incision, followed by end-firing holmium lasering (35.3%). Median operation time was 30 (25-45) minutes. The overall complication rate was 12.4%, with 19 (5.1%) patients suffering from acute urinary retention, 6 (1.6%) patients requiring prolonged irrigation due to persistent hematuria, and a surgical hemostasis was necessary in 8 cases (2.2%). Overall postoperative incontinence rate was 17.2%, with urge incontinence accounting for the most common type (45.3%). Incontinence lasted more than 3 months in 9/46 (14.3%) patients. Recurrent BNS occurred in 29 (7.8%) patients and was managed by re-endoscopic incision in 21 (5.6%) patients and dilatation only in 6 (1.6%) patients. Two (0.5%) patients underwent urethroplasty for recalcitrant stenosis. Logistic regression analysis showed that Collings knife was associated with higher odds of having postoperative incontinence (OR 3.93 95% CI 1.45-11.13, p=0.008) and BN recurrence (OR 3.589 95% CI 1.157-15.7, p=0.047). Conclusion: Transurethral BN incision provides satisfactory short-term results with an acceptable rate of complications.

Application of Transcranial Sonography for the Assessment of Brain Midline Shift in Patients Presenting With Suspected Intracranial Pathology to the Emergency Department of a Tertiary Care Hospital in Central Gujarat, India.

BACKGROUND: A shift in midline brain structure indicates raised intracranial pressure (ICP), thereby a sign of compromised perfusion to brain tissues or a mass effect. Early diagnosis can help in planning timely neurosurgical interventions that could prevent further neuron loss. Also, this may aid in neuroprognostication. OBJECTIVES: The objectives of the study were to find the accuracy of bedside assessment of brain midline shift (MLS) using transcranial sonography (TCS) in comparison to a computed tomography (CT) scan of the brain for patients presenting with suspected intracranial pathology to the emergency department (ED). METHODS: This prospective observational study was carried out for one year in an ED. A total of 124 patients with suspected intracranial pathology were included in the study. Transtemporal scanning along the orbitomeatal line was performed to image the third ventricle. The distance between the third ventricle and the internal side of the temporal bone was measured on both sides as A and B. The MLS was then calculated using the following formula: midline shift = (A-B)/2. The data were entered and analyzed using a Microsoft Excel worksheet (Microsoft Corp., Redmond, WA). RESULTS: Out of the total 124 patients enrolled in this study, adequate views for 12 patients were not obtained and, hence, they were excluded from the study. The time to perform a TCS assessment of brain MLS was around 22 minutes (range: 15-30 minutes). In our study, out of 112 analyzed patients, 33 (29.5% of our study) had a significant MLS in the brain (defined by an MLS of more than 5 mm) diagnosed by TCS. Analyzing CT brain results revealed that out of the total 112 patients under study, 27 had a significant brain MLS (24.1% of the total population under study) as defined above. CONCLUSION: A TCS is a promising alternative to a brain CT in an emergency for brain MLS detection.

Effects of Ultrasound-Guided Lower Extremity Nerve Blocks for Below-Knee Procedures in the Emergency Department of a Tertiary Care Hospital, Central Gujarat.

Background and objectives Ultrasound-guided femoral and popliteal sciatic nerve blocks are useful adjuncts for many below-knee procedures like debridement, amputation, etc. The objectives of the study were to find the efficacy and feasibility of the ultrasound-guided combined femoral and popliteal sciatic nerve block for below-knee procedures in the Emergency Medicine Department (ED). Methodology This prospective clinical study was carried out over three months in ED. A total of 30 patients undergoing below-knee procedures were included in the study. Femoral and popliteal sciatic nerve blocks were administered to each patient using the high-frequency linear ultrasound probe by emergency physicians trained in ultrasound. The effect of blocks, amount of local anesthetic (LA) used, duration of the procedure, and post-block analgesia were recorded. Patients were monitored for possible complications, if any. Data were entered and analyzed using a Microsoft Excel worksheet. Results The average volume of LAs required was around 34.5 cc for both blocks combined. No complications like vascular puncture or nerve injury were reported during the study. The time taken to complete the procedure was around 33 minutes, and the average time to achieve sensory block was around 9 minutes after completing the procedure. Conclusions An ultrasound-guided combined femoral and popliteal sciatic nerve block is an effective and feasible procedure and thus should be considered in ED for below-knee procedures.

Effect of Multimedia Teaching Tools in Parental Anxiety and Comprehension of Informed Consent Procedure in Pediatric Surgical Procedures: A Single Centre Randomized Control Trial.

INTRODUCTION: Informed consent is an essential component of medical ethics. In children, the parent or legally authorized guardian must consent to any medical or surgical intervention. A number of adjuncts have been developed to supplement the consent process including multimedia tools. Unfortunately, there is little information regarding the use of Multimedia teaching tools (MMT) in pediatric settings in developing countries with diversities in language, socioeconomic and educational status. OBJECTIVES: The objectives of the study were to compare the parental comprehension of the surgery through the informed consent obtained either by conventional method or by multimedia tool and the effect of MMT in alleviating parental anxiety against the conventional method and to assess their overall satisfaction. METHODS: A randomized control trial was conducted between 2018 and 2020, including MMT and conventional groups. A novel Multimedia tool with a Microsoft PowerPoint presentation was created. A 5-Question knowledge-based test, State-Trait Anxiety Inventory (STAI) tool, and a Likert-based questionnaire were used to assess the comprehension, anxiety, and satisfaction of parents. RESULTS: Among 122 randomized cohorts, the mean value of percentage fall in anxiety STAI score in the MMT group was 44.64 ± 10.14 whereas in the Conventional group it was 26.6 ± 11.91 (p < 0.05). MMT cohort scored higher in the knowledge-based test (p < 0.05) and recorded higher parental satisfaction. CONCLUSION: The Multimedia tool aided consent procedure is effective in reducing parental anxiety and improving their comprehension and overall satisfaction. Thus, they can be used as an effective supplement in preoperative surgical education and consent procedure. LEVEL OF EVIDENCE: Level I.

Physicochemical Properties Predict Retention of Antibiotics in Water-in-Oil Droplets.

Water-in-oil droplet microfluidics promises capacity for high-throughput single-cell antimicrobial susceptibility assays and investigation of drug resistance mechanisms. Every droplet must serve as an isolated environment with a controlled antibiotic concentration in such assays. While technologies for generation, incubation, screening, and sorting droplets mature, predictable retention of active molecules inside droplets remains a major outstanding challenge. Here, we analyzed 36 descriptors of the antibiotic molecules against experimental results on the cross-talk of antibiotics in droplets. We show that partition coefficient and fractional polar surface area are the key physicochemical properties that predict antibiotic retention. We verified the prediction by monitoring growth inhibition by antibiotic-loaded neighboring droplets. Our experiments also demonstrate that transfer of antibiotics between droplets is concentration- and distance-dependent. Our findings immediately apply to designing droplet antibiotic assays and give deeper insight into the retention of small molecules in water-in-oil emulsions.

Utility of Point-of-Care Ultrasound in Differentiating Causes of Shock in Resource-Limited Setup.

BACKGROUND: Delivering early diagnosis of shock in resource-limited setting is challenging, especially with limited availability of point-of-care laboratory and radiological diagnostic facilities. There is growing urgency to provide point-of-care diagnosis and treatment for time-sensitive condition like shock. AIMS: We tried to evaluate the application of point-of-care ultrasound (Rapid Ultrasound for Shock and Hypertension [RUSH] protocol) considering different disease cohort and practice realities in our setup. SETTINGS AND DESIGN: This study was a single-center prospective diagnostic study to check the diagnostic accuracy of point-of-care ultrasound (RUSH protocol). This study was approved by the ethics committee. MATERIALS AND METHODS: The study was conducted at the emergency medicine department of a tertiary care government hospital in Central Gujarat from November 16 to October 17. All adult patients with clinical features of shock with systolic blood pressure <90 mmHg and shock index >1 presenting to emergency department were included as participants. The results of point-of-care ultrasound (RUSH protocol) were compared with the diagnosis given by consultants of respective department as per standard departmental practices. STATISTICAL ANALYSIS AND RESULTS: A total of 130 patients were enrolled in this study. Mean time taken to examine by the point-of-care Ultrasound (RUSH protocol) was 12 min (range 11-14 min). Kappa index was 0.860. This protocol was able to correctly diagnose 100% of obstructive shock, 96.3% of cardiogenic shock, 94.4% of hypovolemic shock, 80.9% of mixed type of shock, and 75% of distributive type of shock. CONCLUSION: This study highlights the role of point-of-care ultrasound (RUSH protocol) for early diagnosis of the shock etiology in emergency medicine department. Diagnosis using point-of-care ultrasound (RUSH protocol) significantly agreed with medical diagnosis. It showed good efficacy of point-of-care ultrasound (RUSH protocol) to differentiate causes of shock with good accuracy except distributive shock.

Postoperative noninvasive ventilation and complications in esophageal atresia-tracheoesophageal fistula.

PURPOSE: This study examines the impact of postoperative noninvasive ventilation strategies on outcomes in esophageal atresia-tracheoesophageal fistula (EA-TEF) patients. METHODS: A single center retrospective chart review was conducted on all neonates followed at the EA-TEF Clinic from 2005 to 2017. Primary outcomes were: survival, anastomotic leak, stricture, pneumothorax, and mediastinitis. Statistical significance was determined using Chi-square and logistic regression (p ≤ .05). RESULTS: We reviewed 91 charts. Twenty-five infants (27.5%) were bridged with postextubation noninvasive ventilation (15 on Continuous Positive Airway Pressure (CPAP), 5 on Noninvasive Positive Pressure Ventilation (NIPPV), and 14 on High-Flow Nasal Cannula (HFNC)). Overall, 88 (96.7%) patients survived, 25 (35.7%) had a stricture, 14 (20%) had anastomotic leak, 9 (12.9%) had a pneumothorax, and 4 (5.7%) had mediastinitis. Use of NIPPV was associated with increased risk of mediastinitis (P = .005). Use of HFNC was associated with anastomotic leak (P = .009) and mediastinitis (P = .036). CONCLUSIONS: These data suggest that postoperative noninvasive ventilation techniques are associated with a significantly higher risk of anastomotic leak and mediastinitis. Further prospective research is needed to guide postoperative ventilation strategies in this population. TYPE OF STUDY: Retrospective study. LEVEL OF EVIDENCE: IV.

Enteral administration of bacteria fermented formula in newborn piglets: A high fidelity model for necrotizing enterocolitis (NEC).

OBJECTIVE: To develop an animal model which replicates neonatal NEC and characterizes the importance of bacterial fermentation of formula and short chain fatty acids (SCFAs) in its pathogenesis. BACKGROUND: NEC is a severe form of intestinal inflammation in preterm neonates and current models do not reproduce the human condition. METHODS: Three groups of newborn piglets: Formula alone (FO), Bacteria alone (E.coli: BO) and E.coli-fermented formula (FF) were anesthetized, instrumented and underwent post-pyloric injection of formula, bacteria or fermented-formula. SCFA levels were measured by gas chromatography-mass spectrometry. At 6 h bowel appearance was assessed, histologic and molecular analysis of intestine were performed. Gut inflammation (p65 NF-κB, TLR4, TNF-α, IL-1ß), apoptosis (cleaved caspase-3, BAX, apoptosis) and tight junction proteins (claudin-2, occludin) were measured. RESULTS: SCFAs were increased in FF. Small bowel from FF piglet's demonstrated inflammation, coagulative necrosis and pneumatosis resembling human NEC. Histologic gut injury (injury score, mast cell activation) were increased by Bacteria, but more severe in FF piglets. Intestinal expression of p65 NF-κB, NF-κB activation, TNF-α and IL-1ß were increased in BO and markedly increased in the FF group (P<0.05 vs. FO). Intestine from Bacteria piglets demonstrated increased apoptotic index, pro-apoptotic protein expression and decreased tight junction proteins. These changes were more severe in FF piglets. CONCLUSIONS: Our piglet model demonstrates the findings of NEC in human neonates: systemic acidosis, intestinal inflammation, pneumatosis and portal venous gas. Bacteria alone can initiate intestinal inflammation, injury and apoptosis, but bacterial fermentation of formula generates SCFAs which contribute to the pathogenesis of NEC.

Preemptive application of airway pressure release ventilation prevents development of acute respiratory distress syndrome in a rat traumatic hemorrhagic shock model.

BACKGROUND: Once established, the acute respiratory distress syndrome (ARDS) is highly resistant to treatment and retains a high mortality. We hypothesized that preemptive application of airway pressure release ventilation (APRV) in a rat model of trauma/hemorrhagic shock (T/HS) would prevent ARDS. METHODS: Rats were anesthetized, instrumented for hemodynamic monitoring, subjected to T/HS, and randomized into two groups: (a) volume cycled ventilation (VC) (n = 5, tidal volume 10 mL/kg; positive end-expiratory pressure 0.5 cmH(2)O) or (b) APRV (n = 4, P(high) = 15-20 cmH(2)O; T(high) = 1.3-1.5 s to achieve 90% of the total cycle time; T(low) = 0.11-0.14 s, which was set to 75% of the peak expiratory flow rate; P(low) = 0 cmH(2)O). Study duration was 6 h. RESULTS: Airway pressure release ventilation prevented lung injury as measured by PaO(2)/FIO(2) (VC 143.3 ± 42.4 vs. APRV 426.8 ± 26.9, P < 0.05), which correlated with a significant decrease in histopathology as compared with the VC group. In addition, APRV resulted in a significant decrease in bronchoalveolar lavage fluid total protein, increased surfactant protein B concentration, and an increase in epithelial cadherin tissue expression. In vivo microscopy demonstrated that APRV significantly improved alveolar patency and stability as compared with the VC group. CONCLUSIONS: Our findings demonstrate that preemptive mechanical ventilation with APRV attenuates the clinical and histologic lung injury associated with T/HS. The mechanism of injury prevention is related to preservation of alveolar epithelial and endothelial integrity. These data support our hypothesis that preemptive APRV, applied using published guidelines, can prevent the development of ARDS.

Chemically modified tetracycline 3 prevents acute respiratory distress syndrome in a porcine model of sepsis + ischemia/reperfusion-induced lung injury.

Experimental pharmacotherapies for the acute respiratory distress syndrome (ARDS) have not met with success in the clinical realm. We hypothesized that chemically modified tetracycline 3 (CMT-3), an anti-inflammatory agent that blocks multiple proteases and cytokines, would prevent ARDS and injury in other organs in a clinically applicable, porcine model of inflammation-induced lung injury. Pigs (n = 15) were anesthetized and instrumented for monitoring. A "2-hit" injury was induced: (a) peritoneal sepsis-by placement of a fecal clot in the peritoneum, and (b) ischemia/reperfusion-by clamping the superior mesenteric artery for 30 min. Animals were randomized into two groups: CMT-3 group (n = 7) received CMT-3 (200 mg/kg); placebo group (n = 9) received the same dose of a CMT-3 vehicle (carboxymethylcellulose). Experiment duration was 48 h or until early mortality. Animals in both groups developed polymicrobial bacteremia. Chemically modified tetracycline 3 treatment prevented ARDS as indicated by PaO(2)/FIO(2) ratio, static compliance, and plateau airway pressure (P < 0.05 vs. placebo). It improved all histological lesions of ARDS (P < 0.05 vs. placebo). The placebo group developed severe ARDS, coagulopathy, and histological injury to the bowel. Chemically modified tetracycline 3 treatment prevented coagulopathy and protected against bowel injury. It significantly lowered plasma concentrations of interleukin 1ß (IL-1ß), tumor necrosis factor α, IL-6, IL-8, and IL-10. This study presents a clinically relevant model of lung injury in which CMT-3 treatment prevented the development of ARDS due in part to reduction of multiple plasma cytokines. Treatment of sepsis patients with CMT-3 could significantly reduce progression from sepsis into ARDS.

Jack of all trades: pleiotropy and the application of chemically modified tetracycline-3 in sepsis and the acute respiratory distress syndrome (ARDS).

Sepsis is a disease process that has humbled the medical profession for centuries with its resistance to therapy, relentless mortality, and pathophysiologic complexity. Despite 30 years of aggressive, concerted, well-resourced efforts the biomedical community has been unable to reduce the mortality of sepsis from 30%, nor the mortality of septic shock from greater than 50%. In the last decade only one new drug for sepsis has been brought to the market, drotrecogin alfa-activated (Xigris™), and the success of this drug has been limited by patient safety issues. Clearly a new agent is desperately needed. The advent of recombinant human immune modulators held promise but the outcomes of clinical trials using biologics that target single immune mediators have been disappointing. The complex pathophysiology of the systemic inflammatory response syndrome (SIRS) is self-amplifying and redundant at multiple levels. In this review we argue that perhaps pharmacologic therapy for sepsis will only be successful if it addresses this pathophysiologic complexity; the drug would have to be pleiotropic, working on many components of the inflammatory cascade at once. In this context, therapy that targets any single inflammatory mediator will not adequately address the complexity of SIRS. We propose that chemically modified tetracycline-3, CMT-3 (or COL-3), a non-antimicrobial modified tetracycline with pleiotropic anti-inflammatory properties, is an excellent agent for the management of sepsis and its associated complication of the acute respiratory distress syndrome (ARDS). The purpose of this review is threefold: (1) to examine the shortcomings of current approaches to treatment of sepsis and ARDS in light of their pathophysiology, (2) to explore the application of COL-3 in ARDS and sepsis, and finally (3) to elucidate the mechanisms of COL-3 that may have potential therapeutic benefit in ARDS and sepsis.

Comparison of "open lung" modes with low tidal volumes in a porcine lung injury model.

BACKGROUND: Ventilator strategies that maintain an "open lung" have shown promise in treating hypoxemic patients. We compared three "open lung" strategies with standard of care low tidal volume ventilation and hypothesized that each would diminish physiologic and histopathologic evidence of ventilator induced lung injury (VILI). MATERIALS AND METHODS: Acute lung injury (ALI) was induced in 22 pigs via 5% Tween and 30-min of injurious ventilation. Animals were separated into four groups: (1) low tidal volume ventilation (LowVt -6 mL/kg); (2) high-frequency oscillatory ventilation (HFOV); (3) airway pressure release ventilation (APRV); or (4) recruitment and decremental positive-end expiratory pressure (PEEP) titration (RM+OP) and followed for 6 h. Lung and hemodynamic function was assessed on the half-hour. Bronchoalveolar lavage fluid (BALF) was analyzed for cytokines. Lung tissue was harvested for histologic analysis. RESULTS: APRV and HFOV increased PaO(2)/FiO(2) ratio and improved ventilation. APRV reduced BALF TNF-α and IL-8. HFOV caused an increase in airway hemorrhage. RM+OP decreased SvO(2), increased PaCO(2), with increased inflammation of lung tissue. CONCLUSION: None of the "open lung" techniques were definitively superior to LowVt with respect to VILI; however, APRV oxygenated and ventilated more effectively and reduced cytokine concentration compared with LowVt with nearly indistinguishable histopathology. These data suggest that APRV may be of potential benefit to critically ill patients but other "open lung" strategies may exacerbate injury.

A clinically applicable porcine model of septic and ischemia/reperfusion-induced shock and multiple organ injury.

BACKGROUND: Although many sepsis treatments have shown efficacy in acute animal models, at present only activated protein C is effective in humans. The likely reason for this discrepancy is that most of the animal models used for preclinical testing do not accurately replicate the complex pathogenesis of human sepsis. Our objective in this study was to develop a clinically applicable model of severe sepsis and gut ischemia/reperfusion (I/R) that would cause multiple organ injury over a period of 48 h. MATERIALS AND METHODS: Anesthetized, instrumented, and ventilated pigs were subjected to a "two-hit" injury by placement of a fecal clot through a laparotomy and by clamping the superior mesenteric artery (SMA) for 30 min. The animals were monitored for 48 h. Wide spectrum antibiotics and intravenous fluids were given to maintain hemodynamic status. FiO(2) was increased in response to oxygen desaturation. Twelve hours following injury, a drain was placed in the laparotomy wound. Extensive hemodynamic, lung, kidney, liver, and renal function measurements and serial measurements of arterial and mixed venous blood gases were made. Bladder pressure was measured as a surrogate for intra-peritoneal pressure to identify the development of the abdominal compartment syndrome (ACS). Plasma and peritoneal ascites cytokine concentration were measured at regular intervals. Tissues were harvested and fixed at necropsy for detailed morphometric analysis. RESULTS: Polymicrobial sepsis developed in all animals. There was a progressive deterioration of organ function over the 48 h. The lung, kidney, liver, and intestine all demonstrated clinical and histopathologic injury. Acute lung injury (ALI) and ACS developed by consensus definitions. Increases in multiple cytokines in serum and peritoneal fluid paralleled the dysfunction found in major organs. CONCLUSION: This animal model of Sepsis+I/R replicates the systemic inflammation and dysfunction of the major organ systems that is typically seen in human sepsis and trauma patients. The model should be useful in deciphering the complex pathophysiology of septic shock as it transitions to end-organ injury thus allowing sophisticated preclinical studies on potential treatments.