OBJECTIVES: To investigate the genomic differences between two extensively drug resistant, ST16 strains of Klebsiella pneumoniae recovered from patients in the same ICU, one of which was colistin resistant. METHODS: Antimicrobial susceptibilities of the isolates were determined using VITEK-2. Hybrid assemblies for both strains were generated using Oxford Nanopore and Illumina technologies. The sequence type, capsule type, O-locus type, antimicrobial resistance determinants and plasmids carried by the isolates were inferred from the genome sequence. The phylogenetic placement, antimicrobial resistance, and virulence determinants of the isolates relative to a collection (n=871) of ST16 isolates were assessed. RESULTS: Both BC16, a colistin-resistant blood stream isolate and U23, a colistin-sensitive urinary isolate displayed near-identical antimicrobial resistance profiles and genome sequences with varying plasmid profiles. The BC16 genome only had 21 SNPs relative to U23 and belonged to the same capsule, O-antigen locus and multi-locus sequence types. The mgrB locus in BC16 was disrupted by an IS5 element. Phylogenetically, U23 and BC16 were placed on a clade with 4 strains belonging to K-type K48 and O-type O2a as opposed to majority (n=807) of the strains (K-type K51 and O-type O3b). CONCLUSIONS: BC16 was a colistin resistant derivative of U23, which evolved colistin resistance by an IS5-mediated disruption of the mgrB locus, likely during treatment of the index patient with colistin in the ICU. The strains belong to a rare subtype of ST16 with unique capsular and O-antigen types underscoring the utility of genomic surveillance networks and open-access genomic surveillance data in tracking problem clones.
Anti-Bacterial Agents , Emergency Service, Hospital , Humans , Emergency Service, Hospital/organization & administration , Emergency Service, Hospital/statistics & numerical data , Anti-Bacterial Agents/therapeutic use , Organ Dysfunction Scores , Randomized Controlled Trials as Topic/methods , Receptors, Urokinase Plasminogen Activator/blood , Receptors, Urokinase Plasminogen Activator/analysis , Early Diagnosis , Risk Assessment/methods
Background: With the provision of a small positive end-expiratory pressure (PEEP) effect, high-flow nasal oxygen (HFNO) therapy carries a risk of stomach distension. The present study was conducted to find out the air leak in the gastric antrum leading to gastric distension in adult patients with acute respiratory failure receiving HFNO therapy. Materials and methods: Adult patients with early hypoxemic respiratory failure requiring HFNO therapy were enrolled in this trial. Before initiation of HFNO therapy, baseline gastric volume (GV) and the average number of peristaltic contractions over one minute were measured using ultrasound. Once the patient was stabilized on HFNO therapy, a 2nd, 3rd, and 4th ultrasound scans were acquired at 10, 20, and 30 minutes respectively. Vitals and blood gas values were recorded at the baseline and after 30 min of initiation of HFNO therapy. Patient comfort, duration of HFNO therapy, and outcome were also recorded. Results: The GV at 10, 20, and 30 minutes were significantly larger (p < 0.001) compared to baseline. This increase in GV was associated with a significantly increased number of peristaltic contractions and had a significant positive correlation with the HFNO flow (r = 0.541; p < 0.001). The HFNO therapy was well tolerated by most of the patients and led to a significant improvement in the vitals and blood gas parameters at 30 minutes after initiation of HFNO therapy. Conclusion: In adult patients with hypoxemic respiratory failure, the use of HFNO therapy produces gas leaks into the stomach leading to increased gastric volume. The gastric distension increases the peristaltic contraction and higher flows result in more distension. How to cite this article: Ramachandran A, Bhatia P, Mohammed S, Kamal M, Chhabra S, Paliwal B. Gastric Insufflation with High Flow Nasal Oxygen Therapy in Adult Patients Admitted to Intensive Care Unit: An Observational Study. Indian J Crit Care Med 2024;28(4):393-398.
Background Drilling in neurosurgery is an integral part of surgical exposure, especially in skull base approaches and craniovertebral junction (CVJ) surgeries. Most of such drillings are done in close proximity to the neurovascular structures in skull base surgeries and cervical-medullary junction or facet/pedicle in CVJ surgeries. Reluctance to drilling among young neurosurgeons is due to less hands-on experience during training and also, in the early part of the career, due to fear of injury to neurovascular structures. Methods Five commonest bone removals for skull base region and CVJ surgeries that can be safely done using manual instruments were identified based on experiences of senior authors. The authors highlight key technical nuances to widen surgical corridors using manual instruments safely for skull base surgical approaches. Results Basic neuroanatomical concepts and basic physics help in using manual instruments safely for bone removals in various skull base surgical approaches. Conclusions Manual instruments may be used for bone removals in selected skull base surgical approaches, which help young neurosurgeons to perform these surgeries in limited-resource settings.
Introduction: Older patients are particularly vulnerable to age-related respiratory changes. This prospective randomized controlled trial studied the effects of high and low fractions of inspired oxygen (FiO2) with the recruitment maneuver (RM) during extubation on lung atelectasis post-operatively in older patients undergoing major abdominal surgery. Methods: We randomized a total of 132 patients aged >60 years who underwent both elective and emergency major abdominal surgeries and met the inclusion criteria into three groups (H, HR, and LR) using computer-generated block randomization. Group H received high FiO2 (1), Group HR received high FiO2 (1) with RM followed by a positive end-expiratory pressure of 5 cm H2O, and Group LR received low FiO2 (0.4) with RM followed by a positive end-expiratory pressure of 5 cm H2O 10 min before extubation. Oxygenation and atelectasis were measured using the arterial partial pressure of oxygen (PaO2)/FiO2 ratios and lung ultrasound score. Postoperative pulmonary complications were recorded up to 24 h postoperatively. Results: The mean PaO2/FiO2 at 30 min post-extubation was significantly higher in Groups LR and HR compared to that in Group H (390.71 ± 29.55, 381.97 ± 24.97, and 355.37 ± 31.7, p <0.001). In the immediate postoperative period, the median lung ultrasound score was higher in Group H than that in Groups LR and HR (6 [5-7]), 3 [3-5], and 3.5 [2.25-4.75], p <0.001). The incidence of oxygen desaturation and oxygen requirements was higher in Group H during the postoperative period. Conclusion: The RM before extubation is beneficial in reducing atelectasis and postoperative pulmonary complications, irrespective of the FiO2 concentration used in older adults undergoing major abdominal surgeries.
Background and Aims: There is limited literature wherein the hypotensive drugs have been compared to know the cerebral effects by monitoring regional cerebral oxygen saturation (rScO2). This study aimed to compare the effects of dexmedetomidine and nitroglycerin on rScO2 during controlled hypotensive anaesthesia using near-infrared spectroscopy (NIRS). The primary objective was to evaluate the non-inferiority of dexmedetomidine versus nitroglycerin in the occurrence of cerebral desaturation events (CDEs) during hypotensive anaesthesia. Methods: Adult patients scheduled to undergo head and neck surgery under general anaesthesia randomised to receive either dexmedetomidine or nitroglycerin infusion for controlled hypotensive anaesthesia. Cerebral oximetry was monitored with NIRS, and data regarding CDEs, bilateral rScO2, and peri-operative haemodynamics were collected. Continuous data were analysed using unpaired Student's t-tests except for intra-group analyses, which were analysed using paired t-tests. Categorical data were analysed using the Chi-square test. For comparison of time to CDEs, Kaplan-Meier survival analysis with log-rank test was performed. Results: Of the 82 patients in both groups, CDEs were observed in 15 patients each. A decrease from baseline by 20% was observed in three patients: one in Group N and two in Group D. Statistically, there was an equal risk of getting CDEs in the groups. The time to CDE was comparable (P > 0.05). The difference in heart rate was statistically significant (P < 0.001). Conclusion: Dexmedetomidine is non-inferior to nitroglycerin in terms of the occurrence of cerebral desaturation events when used for controlled hypotensive anaesthesia in head and neck surgeries.
Background: Acute hypoxemic respiratory failure is among the more commonly occurring complications in postoperative patients. Supplemental oxygen and addressing the primary etiology form the basis of its treatment. Materials and methods: We conducted an open-labeled randomized control trial with 90 adult patients and compared three oxygen delivery vehicles (ODV), i.e., noninvasive ventilation (NIV), high-flow nasal cannula (HFNC), and venturi mask (VM) in postoperative hypoxemic patients. The primary outcome variable was a change in the P/F ratio after 2 hours of use of ODV. Results: It was observed that the change in P/F ratio after 2 hours was similar in all three ODV groups (p = 0.274). The mean values of the post-ODV P/F ratio were comparable with the pre-ODV P/F ratio in all three modalities. The P/F ratio after HFNC was 358.08 ± 117.95; after NIV was 357.60 ± 220.67; and after VM was 355.47 ± 101.90 (p = 0.997). Conclusion: Among HFNC, NIV, and VM, none of the devices proved superior to the other for use in postoperative hypoxemia. How to cite this article: Mishra S, Kothari N, Sharma A, Goyal S, Rathod D, Meshram T, et al. Comparison of Oxygen Delivery Devices in Postoperative Patients with Hypoxemia: An Open-labeled Randomized Controlled Study. Indian J Crit Care Med 2024;28(3):294-298.
BACKGROUND: In adult patients, there has never been an evaluation of short-axis out-of-plane versus long-axis in-plane approaches of ultrasound-guided dorsalis pedis artery cannulation. This research was conducted to compare these two techniques to cannulate the dorsal pedis artery. METHODS: In this trial, 128 adult patients undergoing surgery and necessitating arterial cannulation were examined. Dorsalis pedis artery cannulation was performed utilizing an ultrasound by long-axis in-plane approach (group L) or short-axis out-of-plane (group S) techniques. RESULTS: Group S had a higher first attempt success rate than group L (46.9% vs 28.6%, p = 0.039). The S group had a lower assessment time than the L group (11.48 ± 3.07 vs 19.68 ± 2.79 s; p = 0.000). Cannulation time was higher in the S group (18.91 ± 1.92 s) compared to the L group (12.48 ± 1.61 s; p = 0.000). Nevertheless, the total procedure time was comparable between the L group and the S group (32.16 ± 2.95 vs 30.42 ± 4.07 s; p = 0.107). CONCLUSIONS: In adults, both views of ultrasonography can be used to guide DPA cannulation. The cannulation time for the DPA in L group was less than the S group, whereas the assessment time was less in S group. The total procedure time, however, was similar between both the groups.
BACKGROUND: Although fast-track treatment pathways are well established in colorectal surgeries, their role in oesophageal resections has not been well studied. This study aims to prospectively evaluate the short-term outcomes of enhanced recovery after surgery (ERAS) protocol in patients undergoing minimally invasive oesophagectomy (MIE) for oesophageal malignancy. PATIENTS AND METHODS: We studied a prospective cohort of 46 consecutive patients from January 2019 to June 2022 who underwent MIE for oesophageal malignancy. The ERAS protocol mainly consists of pre-operative counselling, pre-operative carbohydrate loading, multimodal analgesia, early mobilisation, enteral nutrition and initiation oral feed. Principal outcome measures were the length of post-operative hospital stay, complication rate, mortality rate and 30-day readmission rate. RESULTS: The median (interquartile range [IQR]) age of patients was 49.5 (42, 62) years, and 52.2% were female. The median (IQR) post-operative day of intercoastal drain removal and initiation of oral feed was 4 (3, 4) and 4 (4, 6) days, respectively. The median (IQR) length of hospital stay was 6 (6.0, 7.25) days, with a 30-day readmission rate of 6.5%. The overall complication rate was 45.6%, with a major complication (Clavien-Dindo ≥3) rate of 10.9%. Compliance with the ERAS protocol was 86.9%, and the incidence of major complications was associated with failure to follow the protocol ( P = 0.000). CONCLUSIONS: ERAS protocol in minimally invasive oesophagectomy is feasible and safe. This may result in early recovery with shortened length of hospital stay without an increase in complication and readmission rates.
Background and Aim: Pneumoperitoneum (PP) and the Trendelenburg position (TP) in laparoscopic surgeries are associated with rise in intracranial pressure (ICP). The optic nerve sheath diameter (ONSD) is a surrogate marker of ICP. The study aimed to evaluate the effect of sevoflurane, propofol and propofol with dexmedetomidine as maintenance agent on ICP in TP during laparoscopic surgeries. Material and Methods: A total of 120 American Society of Anesthesiologists (ASA) physical status I/II patients, aged 18-65 years were randomly allocated into three groups: sevoflurane as group S, propofol as group P, and propofol with dexmedetomidine as group PD. The intra-abdominal pressure (IAP) was kept in the range of 12-14 mmHg and TP varied between 15°- 45° angle. The primary objective was comparison of ICP and secondary objectives were IOP, intraoperative hemodynamic and postoperative recovery characteristics among groups. The ONSD and IOP were measured in both eyes 10 min after endotracheal intubation (T0), 5 min after CO2 insufflation (T1), 5 min after TP (T2) and 5 min after deflation of gas (T3). The data were analyzed by using the Statistical Package for Social Sciences version 23. Results: ONSD and IOP at T1 and T2 were significantly higher than T0 in all groups, but no significant difference was found among the intergroup groups. Significantly lower heart rate and mean blood pressure were observed in PD group at T1 and T2 compared to group S and group P. Conclusion: The rise in ICP was comparable among sevoflurane, propofol, and propofol-dexmedetomidine combination as a maintenance agent during laparoscopic surgeries in TP.
Background and Aims: The return of consciousness (ROC) after general anesthesia (GA) is by stopping the administration of anesthetic agents. At present, no drug is given to reverse the loss of consciousness produced by general anesthetic agents. This study is conducted to find whether caffeine and aminophylline hasten the ROC. Material and Methods: This study was conducted on 75 American Society of Anesthesiologists (ASA) I and II female patients undergoing laparoscopic hysterectomy, aged between 18 and 60 years. The patients were divided into three equal groups (Group C: caffeine citrate, Group A: aminophylline, and Group S: saline) of 25 each by a computer-generated random number table. GA was induced with propofol, fentanyl, and maintained with propofol infusion. On completion of the surgery, the neuromuscular blocking agent was reversed and then the infusion of propofol was stopped. The study drug was administered intravenously when the BIS 60 was achieved. Time to achieve BIS 90, return of first gag reflex, eye-opening on verbal command, and extubation after study drug administration were noted. Hemodynamic parameters and SpO2 were also monitored. Results: The time for BIS 60 to 90 was 10 (4.25) min in the caffeine group, 13 (4.25) min in the aminophylline group, and 26 (9.0) min in the saline group. The time to return of gag reflex and time to extubation were shorter in the caffeine and aminophylline group compared to the saline group. The time to eye-opening on verbal command was shorter in the aminophylline group compared to the saline group. Hemodynamic parameters after infusion of the study drug were comparable in all three groups. Conclusion: Caffeine hastens the recovery from total intravenous anesthesia with propofol and fentanyl in laparoscopic hysterectomy as effectively as aminophylline.
Background: Carbapenem-resistant Enterobacterales (CRE) are a global health problem with a growing prevalence. India has a high prevalence of CRE. CRE infections are difficult to treat, and are associated with significant morbidity and mortality. Colonisation is generally a prerequisite for infection and the prevention of CRE colonisation is key to the prevention of CRE infection. Objectives: To determine the prevalence of CRE colonisation and subsequent infections in an adult intensive care unit (ICU) in India. Methods: We conducted a prospective observational study in which perirectal swabs were obtained along with relevant clinical details of consenting adult patients upon ICU admission between January 2019 and August 2020. Rectal screening was performed using MacConkey agar plates with ertapenem disks and further identification was performed using conventional microbiological techniques. Ertapenem minimum inhibitory concentration (MIC) was determined using an epsillometer (E) test. The modified carbapenem inactivation (mCIM) test and EDTA carbapenem inactivation test (eCIM) were performed to confirm carbapenem resistance using the Clinical Laboratory Standards Institute (CLSI) 2020 guidelines. Results: 192 ICU patients were screened for CRE. 37 patients were found to be colonised with CRE. Klebsiella pneumoniae (N=25; 67.6%) was the most frequent CRE isolate, followed by Escherichia coli (N=11; 29.7%) and one Enterobacter species (N=1; 2.7%). 89.2% (33/37) patients developed CRE infection. Pneumonia was the most common CRE infection identified in 12/33 (36.4%) patients.during the hospital stay. The median duration of hospital stay was longer (17 days) for CRE colonised compared to CRE non-colonised patients (9 days) (P<0.001). Death occurred in 27 % (N=10/37) of CRE-colonised patients during the hospital admission. Conclusion: CRE colonisation is associated with high risk of subsequent CRE infection and longer ICU and hospital admission.
The severe acute respiratory distress syndrome-associated coronavirus-2 infection can activate innate and adaptive immune responses which may lead to harmful tissue damage, both locally and systemically. C3, a member of complement system of serum proteins, is a major component of innate immune and inflammatory responses. This study is aimed to assess serum C3 as a marker of COVID-19 severity and a predictor of disease progression. A total of 150 COVID-19 patients, confirmed by RT-PCR, and 50 healthy controls were recruited. Serum C3 levels were determined by using direct colorimetric method. Median levels of serum C3 in total cases and controls were 157.8 and 165.7 mg/dL respectively. Serum C3 although not significantly decreased, they were lower in cases when compared to controls. Similarly, significant differences were found between the groups, with severe group (140.6 mg/dL) having low levels of serum C3 protein when compared to mild (161.0 mg/dL) and moderate group (167.1 mg/dL). Interestingly, during hospitalization, significant difference between baseline (admission) and follow-up (discharge) was observed only in patients with moderate disease. Based on our results, lower levels of C3, with an increase in IL-6 and d-dimer levels, are associated with higher odds of mortality. Therefore, we would like to emphasize that measuring serum C3 levels along with other inflammatory markers might give an added advantage in early identification of patients who are prone to having a severe disease course and can help in a more effective follow-up of disease progression. Supplementary Information: The online version contains supplementary material available at 10.1007/s12291-023-01148-x.
BACKGROUND: We explored the analgesic efficacy of two non-opioid adjuvants (midazolam and dexmedetomidine) with ropivacaine in children undergoing infraumbilical surgeries. METHODS: In this parallel group randomized controlled trial, 135 children aged between 2 and 8 years were recruited. Children were randomly allocated to one of three groups: RD received 1 mL/kg of ropivacaine (0.2%) with dexmedetomidine 1 µg/kg, RM received 1 mL/kg of ropivacaine (0.2%) with midazolam 30 µg/kg, and R received 1 mL/kg of ropivacaine (0.2%) with 1 mL normal saline. The primary outcome of the present study was to determine the duration of postoperative analgesia. Secondary outcomes were assessing postoperative face, leg, activity, cry, consolability (FLACC) pain score, rescue analgesics, hemodynamics, sedation scores, and adverse effects. RESULTS: The analgesia duration was significantly prolonged in the RD and RM group (600.0 [480.0-720.0] minutes and 600.0 [480.0-720.0] minutes, respectively) compared to the R group 360.0 (300.0-480.0) minutes (P < 0.001). The FLACC score was comparatively higher in the R group compared to the RD and RM groups postoperatively. Time for the first rescue analgesia was more prolonged in RD and RM groups when compared with the R group. Postoperative sedation was higher in the RM group up to 120 minutes postoperatively compared to the RD and R groups. CONCLUSION: The combination of dexmedetomidine or midazolam with local anesthetics significantly increases the analgesia duration while minimizing adverse effects.
Adjuvants, Anesthesia , Dexmedetomidine , Drug-Related Side Effects and Adverse Reactions , Midazolam , Pain, Postoperative , Child , Child, Preschool , Humans , Dexmedetomidine/administration & dosage , Midazolam/administration & dosage , Pain, Postoperative/drug therapy , Pain, Postoperative/prevention & control , Ropivacaine/administration & dosage , Adjuvants, Anesthesia/administration & dosage
Objective: Placement of the supraglottic airway devices under direct vision has been shown to decrease the incidence of malposition in adults. This study was designed to compare the clinical performance of C-MAC guided and blind placement of i-gel® in paediatric patients. Methods: The present prospective, randomized controlled study was conducted on 102 paediatric patients scheduled to undergo elective infraumbilical surgeries under general anaesthesia. Patients were randomly divided into group "B" (blind) and group "C" (C-MAC) based on the technique used for placement of i-gel®. The primary objective of the study was to compare the incidence of malposition based on the fiberoptic bronchoscope (FOB) score of the glottic view. Oropharyngeal leak pressure (OPLP), hemodynamic parameters, and insertion characteristics (time taken to insert and the number of attempts) were secondary objectives. Categorical data were presented as ratio or percentage and continuous data were presented as mean ± standard deviation or median [95% confidence interval (CI)]. Results: The incidence of malposition (Brimacombe score 1 or 2) was significantly lower in group C compared to group B (7.8% vs 49% respectively) (P < 0.001); implying a relative risk reduction of 2.42 (95% CI 1.72 to 3.40) with C-MAC. On FOB assessment, the median (interquartile range) Brimacombe score was significantly better in group C [4 (4-4)] compared to group B [3 (2-3)] (P < 0.001). The OPLP was significantly higher in group C compared to group B. Other insertion characteristics were comparable in both the study groups. Conclusion: Compared to blind placement, C-MAC guided placement ensures proper alignment of i-gel® with periglottic structures and proper functioning of i-gel®.
