Exploring the Feasibility of Calculating Expected pCO2 From Venous Blood Gas Samples Alone in Intensive Care Patients.

Introduction This study highlights the significance of assessing acid-base balance and gas exchange in intensive care patients. The research investigates the applicability of using the "expected (pCO2 = HCO3 + 15)" formula, derived from venous blood gas samples, as an alternative to Winter's formula and practical formula. The study emphasizes the importance of identifying the primary acid-base abnormality accurately and efficiently for appropriate clinical intervention in critically ill patients. Methods  This study included 400 adult patients admitted to the Anesthesia Clinic in the Third Stage Anesthesia and Reanimation Intensive Care Unit at Hitit University Erol Olçok Training and Research Hospital between April 2020 and July 2023. Blood gas samples were collected simultaneously from both arterial lines and venous catheters. Patients under 18 years, pregnant women, hemodialysis patients, and those with missing data were excluded. The study aimed to calculate the expected partial pressure of carbon dioxide (pCO2) values using Winter's formula and simple formula for both arterial and venous blood gas samples and assess potential correlations between them. Results The results showed a narrow range for arterial pH values (7.12-7.72), a wider distribution for pCO2 values (17.90-81.30 mmHg), and a moderate dispersion for HCO3 values (12.80-44.33 mmol/L). Both Winter's and simple formulas were applied to estimate the expected pCO2 values, showing strong positive correlations between arterial and venous pH, pCO2, and HCO3 values. The scatterplot illustrated a very high level of association (Pearson's correlation coefficient, r = 1) between the expected pCO2 values derived from both formulas using arterial and venous blood gas samples. Conclusion The clinical study demonstrates that estimating expected pCO2 values in mixed acid-base disorders can be achieved using a simple and convenient formulation, eliminating the need for arterial blood gas sampling and its associated complications.

Is Right Unilateral Transversus Abdominis Plane (TAP) Block Successful in Postoperative Analgesia in Laparoscopic Cholecystectomy?

Background: Transversus abdominis plane (TAP) block is used for postoperative analgesia in laparoscopic cholecystectomy. In laparoscopic cholecystectomy, the incisions are located mainly on the upper right side of the abdomen. Aims: We aim to determine the efficacy of less-invasive ultrasound-guided right unilateral oblique subcostal TAP block in laparoscopic cholecystectomy on postoperative analgesia by comparing patients undergoing bilateral TAP block and a control group. Methods: Ninety patients were equally divided into control, unilateral, and bilateral TAP block groups. TAP blocks were conducted before anesthesia. No block was applied to the control group. Patients' demographics and postoperative pain, satisfaction, and nausea-vomiting scores and tramadol/ondansetron doses were evaluated. Results: There was no significant difference in the verbal numerical rating scale for pain scores at rest and during coughing (VNRS-R and VNRS-C) between unilateral and bilateral TAP block groups at postoperative 1 hour, 2 hour, 4 hour, 8 hour, 12 hour, and 24 hours. In addition, VNRS-R and VNRS-C scores were significantly higher in the control group than in the other two groups. Tramadol consumption in the control group was significantly higher than in the unilateral and bilateral TAP block groups (p ≤ 0.01), while no significant difference was identified between unilateral and bilateral TAP block groups (p=0.303). Nausea-vomiting scores and ondansetron consumption did not differ significantly between all the groups. Patient satisfaction was significantly higher in unilateral and bilateral groups (p < 0.01, p < 0.01) than in the control group, while there was no significant difference between unilateral and bilateral TAP block groups (p=0.793). Conclusions: Right unilateral TAP block provides postoperative analgesia as effective as bilateral TAP block in laparoscopic cholecystectomy.

[Mortality prediction ability of phycians in intensive care units of Turkey (MOPAP)]. / Türkiye'de yogun bakim ünitelerinde hekimin mortaliteyi öngörebilme gücü.

INTRODUCTION: Intensive care physicians are increasingly involved in decision making about the prognosis of intensive care unit ICU patients. With this study; we aimed to evaluate the power of clinician foresight at prediction of mortality in patient at triage to intensive care and patient follow-up. MATERIALS AND METHODS: This study was conducted in ICUs located in various geographical regions of Turkey between January 1, 2017-April 30, 2017.The clinical research was planned as observational, multicenter, cross-sectional. RESULT: A total of 1169 intubated patients were followed in 37 different ICU. At the beginning of the follow-up we asked the physician who will follow the patient in the ICU to give a score for the probability of survival of the patients. Scoring included a total of 6 scores from 0 to 5, with the "0" the worst probability "5" being the best. According to this distribution, only 1 (0.9%) of 113 patients who were given 0 points survived. Three (6.1%) of 49 with the best score of 5 died. Survival rates were significantly different in each score group (r: -0.488; p<0.001). After the combined mortality estimation scores based on the clinical observations of the physicians (0 and 1 point score was combined as non-survive, 4 and 5 score was combined as survived) 320 of the 545 patients were estimated to be dead and 225 were predicted survival. Sensitivity and spesifity of scoring system to predict mortality was 91.56% (95% CI: 87.96-94.37), 76.89% (95% CI: 70.82-82.23) respectively. CONCLUSIONS: In this study, we concluded that the physicians who follow the patients in the ICU can predict the poor prognosis at the time of admission and the high mortality rate. The physician's opinion on mortality estimation should be considered in intensive care mortality scoring in addition to other laboratory and clinical parameters.

Can the C-reactive protein-to-plasma albumin ratio be an alternative scoring to show mortality and morbidity in patients with colorectal cancer?

BACKGROUND: This study aims to demonstrate the sensitivity and specificity of C-reactive protein to plasma albumin (CRP/ALB) ratio in predicting morbidity and mortality in patients operated for colorectal cancer followed up in the intensive care unit by comparing it with current scoring systems. METHODS: The data of patients who underwent surgery for colorectal cancer and hospitalized in the intensive care unit between 2015-2018 with available data were retrospectively analyzed in this study. The CRP/ALB ratio, the physiological and operative severity score for the enumeration of mortality and morbidity (POSSUM) prepared for both gastrointestinal and colorectal surgery, and the Association of Coloproctology of Great Britain and Ireland (ACPGBI-CRC) scoring system prepared for colorectal patients, were compared to determine their success in predicting mortality and morbidity. RESULTS: A total of 119 patients were included in this study. Mortality was observed in nine patients and morbidity was observed in 38 patients. When compared with P-POSSUM, which is the only scoring system showing morbidity, the CRP/ALB ratio was found to have a high prediction accuracy. The C reactive protein to plasma albumin ratio values was found to have lower power than P-POSSUM, CR-POSSUM and ACPGBI-CRC. CONCLUSION: Although scoring systems are useful in predicting morbidity and mortality in colorectal patients, they are difficult to use in practice since they include many parameters. that the findings obtained in this study suggest that the CRP/ALB ratio, which can be calculated without any additional cost, may help the clinician predict mortality and especially morbidity.

The effect of atropine in preventing catheter-related pain and discomfort in patients undergoing transurethral resection due to bladder tumor; prospective randomized, controlled study.

BACKGROUND: Catheter-related bladder discomfort (CRBD) has been observed in many patients undergoing a urethral catheterization. CRBD may be so severe that the patients require additional analgesics. Muscarinic receptors are involved in the mechanism of CRBD. The aim of this study is to determine the effects of the antimuscarinic properties of atropine, which is frequently used in current practice on CRBD, by comparing it with sugammadex which has no antimuscarinic effects. METHODS: Sixty patients selected for transurethral resection due to bladder tumors were randomized into 2 groups: an atropine group and a sugammadex group, with no antimuscarinic effect. The patients were given rocuronium (0.6 mg/kg) as a neuromuscular- blocker. In addition to the frequency and severity of CRBD postoperatively at 0, 1, 6, 12, and 24 hours, postoperative numeric rating scale (NRS) scores, and postoperative nausea and vomiting were examined. RESULTS: The incidence of CRBD was significantly lower in the atropine group in all postoperative measurements. The score was found to be significantly lower in the atropine group when NRS measurements were performed at all time periods (P < 0.01). There was no difference between the groups in terms of nausea and vomiting (P > 0.05). CONCLUSIONS: Atropine is a cheap, easy-to-access, safe-to-use drug for reducing CRBD symptoms, without any observed adverse effects. Since it not only reduces CRBD symptoms but also has a positive effect on postoperative pain, it can be used safely to increase patient comfort in patients receiving general anesthesia and a urinary catheter.

Comparison of Effects of Vessel-Sealing Devices and Conventional Hemorrhoidectomy on Postoperative Pain and Quality of Life.

BACKGROUND The aim of this study was to investigate the early and late results of use of LigaSure, Harmonic Scalpel, and conventional hemorrhoidectomy in hemorrhoidectomy, to determine the least painful method, and to investigate the relationship between pain perception and personal differences in hemorrhoid bundles. MATERIAL AND METHODS Ninety patients undergoing hemorrhoidectomy between 2014 and 2017 were retrospectively evaluated. We investigated the duration of hospitalization and the presence of bleeding, incontinence, perianal wetness, urinary retention, stenosis, and recurrence during follow-up after surgery. Analgesic requirement was determined by Patient-Controlled Analgesia, as well as pain score by use of the Visual Analog Score and patient satisfaction by Short Form-36. We also assessed the relationship between pain and lateral thermal damage, the number of peripheral nerves, number of excised bundles, and the number of thrombosed vessels, as determined by histopathological examination. RESULTS No differences were found among the 3 methods in the duration of hospitalization, the presence of bleeding, fecal incontinence, perianal wetness, urinal retention, anal stenosis, recurrence rate, VAS, analgesic consumption, or results of the SF-36. There was no difference in the number of bundles, thrombosed vessels, or number of nerve fibers in a bundle, but the LigaSure Hemorrhoidectomy had more lateral thermal damage (p<0.001). While there was a difference between VAS of day 1 and 7 according to the hemorrhoid bundles, there was no difference in the other parameters. CONCLUSIONS There was no difference among the 3 methods in terms of complications, postoperative pain, or patient satisfaction, and pain intensity was positively correlated with the number of excised bundles.

Bedside Percutaneous Dilatational Tracheostomy by Griggs Technique: A Single-Center Experience.

BACKGROUND The study evaluated reliability and outcomes of percutaneous dilatational tracheostomy (PDT) performed via Griggs' method in the intensive care unit. MATERIAL AND METHODS We examined 78 patients who underwent bedside PDT in the intensive care unit (ICU). Demographic characteristics were recorded. In addition, ventilator-related pneumonia, duration of performing PDT, and rates of complications, mortality, and morbidity were assessed. RESULTS The mean age of patients was 68.7 years, and 56.4% were females (n=44). The most common indication for ICU was pneumonia (44.9%, n=35), followed by trauma (24.8%, n=13). Mean opening of PDT was 21 minutes. Mean duration of intubation prior to PDT was 21±6 days. Mean FiO2 before and after PDT was 58.7% and 49.1%, respectively. PEEP ratios before and after PDT were 5 and 3, respectively. Seventy-one patients (91%) needed no sedation after PDT. Mechanical ventilator-induced pneumonia was observed in 32.1% (n=25) of patients. The overall complication rate after PDT was 37.1%, most of which were minor. The most common and early complication of PDT was bleeding (28.2%, n=22). Other minor complications included hypotension (3.8%, n=3), desaturation (3.8%, n=3), and subcutaneous emphysema (1.3%, n=1). CONCLUSIONS Tracheostomy offers advantages in terms of improving patient comfort, facilitating weaning of patients from the respirator, and providing clearance of pulmonary secretions by reducing pulmonary dead-spaces. PDT is a simple and reliable procedure with lower complication rates. Its advantages include implementation at bedside, with a shortened procedure duration and accelerated wound healing.

Preoperative anxiety may increase postcesarean delivery pain and analgesic consumption.

BACKGROUND: The aim of this study was to reveal the relationship between high level of prenatal anxiety and postoperative pain and/or analgesic consumption in women undergoing elective cesarean delivery under spinal anesthesia. METHODS: Eighty women, aged between 18-45 years with minimum 37 week- gestation and received spinal anesthesia during elective cesarean delivery, were included into this observational cohort study. Prenatal anxiety was measured with state anxiety inventory, trait anxiety inventory and somatosensory amplification scale. Visual Analogue Scale (VAS) was used to quantify postoperative pain. Amount of analgesic consumed was recorded at 6th, 12th and 18th postoperative hours. RESULTS: State Anxiety Score was above the threshold level (>45) in 18 women (22.5%). No difference was found between women with and without high state anxiety scores except for significantly higher BMI values in high-score group (P=0.07). In multivariate analysis, high BMI at pregnancy (OR: 1.2, 95% CI; 1.0-1.5, P=0.02) and high State Anxiety Score (OR: 1.1, 95% CI; 1.0-1.2, P=0.01) emerged as independent predictors of higher mean pain scores (VAS >4 cm) within 18 hours after cesarean delivery. Also, high State Anxiety Score was found to be independently associated with higher pethidine consumption after cesarean delivery (OR: 1.1, 95% CI; 1.0-1.2, P=0.006). CONCLUSIONS: State anxiety has a negative effect on postcesarean pain whereas trait anxiety does not seem to produce such effect. The effect seems to be more profound in overweight women. Detection of anxiety level before elective cesarean delivery and therapeutic approach to pregnant women may be useful for postoperative pain control.

The end-tidal desflurane concentration for smooth removal of the laryngeal mask airway in anaesthetised adults.

BACKGROUND AND OBJECTIVE: The end-tidal desflurane concentration required for smooth removal of the laryngeal mask airway (LMA) has not been established. Therefore, we aimed to find the end-tidal desflurane concentration for safe, smooth, and uncomplicated LMA removal. METHODS: The study was approved by the Ethical Committee of the Ministry of Health, Diskapi Yildirim Beyazit Research and the Training Hospital, Ankara, Turkey. All patients provided written consent. A total of 23 adults, 18-60 years of age and American Society of Anesthesiologists physical status class I, who had been scheduled for urological surgery were included in the study. The intravenous induction of anaesthesia was performed with propofol 2.5 mg kg⁻¹ and remifentanil 10 µg within 30 s. The LMA was inserted. Maintenance of anaesthesia was provided by desflurane, with nitrous oxide and oxygen. The LMA was removed at predetermined end-tidal desflurane concentrations at the end of surgery. The concentration at which LMA removal was attempted was determined by Dixon's up-down method with 0.5% as the step size. When LMA removal was accomplished without coughing, teeth clenching, gross purposeful movements, breath holding, laryngospasm, and desaturation to SpO(2) less than 90%, it was considered a smooth (successful) removal. RESULTS: For smooth removal of the LMA, end-tidal desflurane EC50 was 2.1% [95% confidence interval (CI) 1.1-2.9%], and the EC95 value was 3.9% (95% CI 3.1-7.9%). CONCLUSION: The EC95 of end-tidal desflurane for the smooth removal of the LMA is 3.9%. LMA removal in adults receiving desflurane may be possible at approximately 0.7 minimum alveolar concentration.

Saphenous nerve block is an effective regional technique for post-menisectomy pain.

In this study we have evaluated the post menisectomy pain relief offered by Saphenous nerve block. This study was planned on 40 patients with a pre-operative and post operative diagnosis of medial meniscus lesion undergoing partial menisectomy arthroscopically. Patients were randomized into 2 groups where Group I received a preoperative Saphenous block while group 2 did not receive a peripheral block, but received 1 ml of saline as placebo injection. After blocks both groups received general anesthesia and IV patient controlled analgesia (PCA) with tramadol for post operative pain relief. Patients rest and activity pain scores were evaluated on post operative 0, 2, 4, 6, 12 and 24 h using visual analog scale (VAS). Total tramadol consumption as well as pain at rest, when weight bearing and the need for external support while walking were recorded. Group I VAS scores were statistically lower then group II during the time of observation periods at rest as well as active movement periods. Tramadol consumption through IV PCA was statistically significantly lower in group I than in group II (P < 0.05). Pain during walking measured at 24 h was significantly different with better results in group I (P < 0.001). Saphenous nerve block is used for different indications; it can also be a good analgesic method for arthroscopic interventions. We have shown it to be effective after medial partial menisectomies. According to our knowledge this report is the first one utilizing saphenous nerve block for pain after arthroscopic medial menisectomy.