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Pancaro C, Balonov K, Herbert K, Shah N, Segal S, Cassidy R, Engoren MC, Manica V, Habib AS. Role of cosyntropin in the management of postpartum post-dural puncture headache: a two-center retrospective cohort study. Int J Obstet Anesth 2023; 56:103917. [PMID: 37625985 DOI: 10.1016/j.ijoa.2023.103917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 03/31/2023] [Accepted: 07/19/2023] [Indexed: 08/27/2023]
Abstract
BACKGROUND Research suggests that postpartum post-dural puncture headache (PDPH) might be prevented or treated by administering intravenous cosyntropin. METHODS In this retrospective cohort study, we questioned whether prophylactic (1 mg) and therapeutic (7 µg/kg) intravenous cosyntropin following unintentional dural puncture (UDP) was effective in decreasing the incidence of PDPH and therapeutic epidural blood patch (EBP) after birth. Two tertiary-care American university hospitals collected data from November 1999 to May 2017. Two hundred and fifty-three postpartum patients who experienced an UDP were analyzed. In one institution 32 patients were exposed to and 32 patients were not given prophylactic cosyntropin; in the other institution, once PDPH developed, 36 patients were given and 153 patients were not given therapeutic cosyntropin. The primary outcome for the prophylactic cosyntropin analysis was the incidence of PDPH and for the therapeutic cosyntropin analysis in exposed vs. unexposed patients, the receipt of an EBP. The secondary outcome for the prophylactic cosyntropin groups was the receipt of an EBP. RESULTS In the prophylactic cosyntropin analysis no significant difference was found in the risk of PDPH between those exposed to cosyntropin (19/32, 59%) and unexposed patients (17/32, 53%; odds ratio (OR) 1.37, 95% CI 0.48 to 3.98, P = 0.56), or in the incidence of EBP between exposed (12/32, 38%) and unexposed patients (6/32, 19%; OR 2.6, 95% CI 0.83 to 8.13, P = 0.095). In the therapeutic cosyntropin analysis, in patients exposed to cosyntropin the incidence of EBP was significantly higher (20/36, 56% vs. 43/153, 28%; OR 3.20, 95% CI 1.52 to 6.74, P = 0.002). CONCLUSIONS Our data show no benefits from the use of cosyntropin for preventing or treating postpartum PDPH.
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Affiliation(s)
- C Pancaro
- Departments of Anesthesiology at the University of Michigan, Tufts, Duke University School of Medicine, Wake Forest University School of Medicine and Medical University of South Carolina, USA.
| | - K Balonov
- Departments of Anesthesiology at the University of Michigan, Tufts, Duke University School of Medicine, Wake Forest University School of Medicine and Medical University of South Carolina, USA
| | - K Herbert
- Departments of Anesthesiology at the University of Michigan, Tufts, Duke University School of Medicine, Wake Forest University School of Medicine and Medical University of South Carolina, USA
| | - N Shah
- Departments of Anesthesiology at the University of Michigan, Tufts, Duke University School of Medicine, Wake Forest University School of Medicine and Medical University of South Carolina, USA
| | - S Segal
- Departments of Anesthesiology at the University of Michigan, Tufts, Duke University School of Medicine, Wake Forest University School of Medicine and Medical University of South Carolina, USA
| | - R Cassidy
- Departments of Anesthesiology at the University of Michigan, Tufts, Duke University School of Medicine, Wake Forest University School of Medicine and Medical University of South Carolina, USA
| | - M C Engoren
- Departments of Anesthesiology at the University of Michigan, Tufts, Duke University School of Medicine, Wake Forest University School of Medicine and Medical University of South Carolina, USA
| | - V Manica
- Departments of Anesthesiology at the University of Michigan, Tufts, Duke University School of Medicine, Wake Forest University School of Medicine and Medical University of South Carolina, USA
| | - A S Habib
- Departments of Anesthesiology at the University of Michigan, Tufts, Duke University School of Medicine, Wake Forest University School of Medicine and Medical University of South Carolina, USA
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Ahsan T, Wang AY, Karimi H, Kanter MJ, Olmos M, Kosarchuk JJ, Balonov K, Liu P, Riesenburger RI, Kryzanski J. Assessing the safety and efficacy of spinal anesthesia in patients with significant comorbidities. World Neurosurg 2023:S1878-8750(23)00762-3. [PMID: 37295471 DOI: 10.1016/j.wneu.2023.05.116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 05/29/2023] [Accepted: 05/30/2023] [Indexed: 06/12/2023]
Abstract
BACKGROUND Spinal anesthesia is an effective modality for lumbar surgeries. Patient eligibility with respect to medical comorbidities remains a topic of debate. Obesity (BMI ≥30), anxiety, obstructive sleep apnea, re-operation at the same level, and multilevel operations have variously been reported as relative contraindications. We hypothesize that patients undergoing common lumbar surgeries with these comorbidities do not experience greater rates of complications when compared to controls. METHODS We analyzed a prospectively collected database of patients undergoing thoracolumbar surgery under spinal anesthesia and identified 422 cases. Surgeries were under three hours, the duration of action of intrathecal bupivacaine, and include microdiscectomies, laminectomies, and both single and multi-level fusions. Procedures were performed by a single surgeon at a single academic center. In overlapping groups, 149 patients had a BMI ≥30, 95 had diagnosed anxiety, 79 underwent multilevel surgery, 98 had obstructive sleep apnea, and 65 had a prior operation at the same level. The control group included 132 patients who did not have these risk factors. Differences in important perioperative outcomes were assessed. RESULTS There were no statistically significant differences in intraoperative and post-operative complications save two cases of pneumonia in the anxiety group and one case in the reoperative group. There were also no significant differences for patients with multiple risk factors. Rates of spinal fusion were similar among groups, though mean length of stay and operative time were different. CONCLUSIONS Spinal anesthesia is a safe option for patients with significant comorbidities and can be considered for most patients undergoing routine lumbar surgeries.
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Affiliation(s)
- Tameem Ahsan
- Department of Neurosurgery, Tufts Medical Center, Boston, MA, USA.
| | - Andy Y Wang
- Department of Neurosurgery, Tufts Medical Center, Boston, MA, USA
| | - Helen Karimi
- Department of Neurosurgery, Tufts Medical Center, Boston, MA, USA
| | - Matthew J Kanter
- Department of Neurosurgery, Tufts Medical Center, Boston, MA, USA
| | - Michelle Olmos
- Department of Neurosurgery, Tufts Medical Center, Boston, MA, USA
| | | | | | - Penny Liu
- Department of Anesthesia, Tufts Medical Center, Boston, MA, USA
| | | | - James Kryzanski
- Department of Neurosurgery, Tufts Medical Center, Boston, MA, USA
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Wang AY, Olmos M, Ahsan T, Kanter M, Liu P, Balonov K, Riesenburger RI, Kryzanski J. A Second Prone Dose Algorithm for Patients Undergoing Spinal Anesthesia During Thoracolumbar Surgeries. Oper Neurosurg (Hagerstown) 2023; 24:283-290. [PMID: 36701492 PMCID: PMC10158911 DOI: 10.1227/ons.0000000000000497] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 09/06/2022] [Indexed: 01/27/2023] Open
Abstract
BACKGROUND Spinal anesthesia is safe and effective in lumbar surgeries, with numerous advantages over general anesthesia (GA). Nevertheless, 1 major concern preventing the widespread adoption of this anesthetic modality in spine surgeries is the potential for intraprocedural anesthetic failure, resulting in the need to convert to GA intraoperatively. OBJECTIVE To present a novel additional prone dose algorithm for when a first spinal dose fails to achieve the necessary effect. METHODS A total of 422 consecutive patients undergoing simple and complex thoracolumbar surgeries under spinal anesthesia were prospectively enrolled into our database. Data were retrospectively collected through extraction of electronic health records. RESULTS Sixteen of 422 required a second prone dose, of whom 1 refused and was converted to GA preoperatively. After 15 were given a prone dose, only 2 required preoperative conversion to GA. There were no instances of intraoperative conversion to GA. The success rate for spinal anesthesia without the need for conversion rose from 96.4% to 99.5%. In patients who required a second prone dose, there were no instances of spinal headache, deep vein thrombosis, pneumonia, urinary tract infection, urinary retention, readmission within 30 days, acute pain service consult, return to operating room, durotomy, or cerebrospinal fluid on puncture. CONCLUSION Use of an additional prone dose algorithm was able to achieve a 99.5% success rate, and those who received this second dose did not experience any complications or negative operative disadvantages. Further research is needed to investigate which patients are at increased risk of inadequate analgesia with spinal anesthesia.
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Affiliation(s)
- Andy Y. Wang
- Department of Neurosurgery, Tufts Medical Center, Boston, Massachusetts, USA
| | - Michelle Olmos
- Department of Neurosurgery, Tufts Medical Center, Boston, Massachusetts, USA
| | - Tameem Ahsan
- Department of Neurosurgery, Tufts Medical Center, Boston, Massachusetts, USA
| | - Matthew Kanter
- Department of Neurosurgery, Tufts Medical Center, Boston, Massachusetts, USA
| | - Penny Liu
- Department of Anesthesiology and Perioperative Medicine, Tufts Medical Center, Boston, Massachusetts, USA
| | - Konstantin Balonov
- Department of Anesthesiology and Perioperative Medicine, Tufts Medical Center, Boston, Massachusetts, USA
| | - Ron I. Riesenburger
- Department of Neurosurgery, Tufts Medical Center, Boston, Massachusetts, USA
| | - James Kryzanski
- Department of Neurosurgery, Tufts Medical Center, Boston, Massachusetts, USA
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Hernandez NS, Wang AY, Kanter M, Olmos M, Ahsan T, Liu P, Balonov K, Riesenburger RI, Kryzanski J. Assessing the impact of spinal versus general anesthesia on postoperative urinary retention in elective spinal surgery patients. Clin Neurol Neurosurg 2022; 222:107454. [PMID: 36201900 DOI: 10.1016/j.clineuro.2022.107454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 09/19/2022] [Accepted: 09/25/2022] [Indexed: 11/27/2022]
Abstract
OBJECTIVE Postoperative urinary retention (POUR) is a common and vexing complication in elective spine surgery. Efficacious prevention strategies are still lacking, and existing studies focus primarily on identifying risk factors. Spinal anesthesia has become an attractive alternative to general anesthesia in elective lumbar surgery, with the potential of having a differential impact on POUR. METHODS 422 spinal anesthesia procedures were prospectively collected between 2017 and 2021 and compared to 416 general anesthesia procedures retrospectively collected between 2014 and 2017, at a single academic center by the same senior neurosurgeon. The main outcome was POUR, defined as the need for straight bladder catheterization or indwelling bladder catheter placement after surgery due to failure to void. A power calculation was performed prior to data collection. RESULTS The general anesthesia group had a higher rate of POUR (9.1 %) compared with the spinal anesthesia group (4.3 %), p = 0.005. At baseline, the spinal anesthesia cohort had an older average age and fewer patients with a history of previous spine surgery. Other comorbid conditions were comparable between the groups. For perioperative characteristics, spinal anesthesia patients had higher ASA scores, shorter operative times, shorter lengths of hospital stay, less operative levels, and zero use of intraoperative bladder catheterization. Acute pain service consult was similar between the groups. A multivariable logistic regression revealed that spinal anesthesia was associated with a significantly lower rate of urinary retention in the spinal anesthesia group (p = 0.0130), after adjusting for potentially confounding factors. Other statistically significant risk factors for POUR included diabetes, (p = 0.003), BPH (p = 0.014), operative time (p = 4.94e-06), and ASA score (p = 0.005). CONCLUSIONS We collect and analyze one of the largest available cohorts of patients undergoing simple and complex surgeries under spinal and general anesthesia, finding that spinal anesthesia is independently associated with a lower incidence of POUR compared to general anesthesia, even when adjusted for potentially confounding risk factors. Further prospective trials are needed to explore this finding.
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Affiliation(s)
| | - Andy Y Wang
- Department of Neurosurgery, Tufts Medical Center, Boston, MA, USA
| | - Matthew Kanter
- Department of Neurosurgery, Tufts Medical Center, Boston, MA, USA
| | - Michelle Olmos
- Department of Neurosurgery, Tufts Medical Center, Boston, MA, USA
| | - Tameem Ahsan
- Department of Neurosurgery, Tufts Medical Center, Boston, MA, USA
| | - Penny Liu
- Department of Anesthesia, Tufts Medical Center, Boston, MA, USA
| | | | | | - James Kryzanski
- Department of Neurosurgery, Tufts Medical Center, Boston, MA, USA.
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Wang AY, Liu P, Balonov K, Riesenburger R, Kryzanski J. Use of Spinal Anesthesia in Lower Thoracic Spine Surgery: A Case Series. Oper Neurosurg (Hagerstown) 2022; 23:298-303. [PMID: 36106935 PMCID: PMC10586860 DOI: 10.1227/ons.0000000000000325] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 04/25/2022] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND Spinal anesthesia is a safe and effective alternative to general anesthesia for patients undergoing lumbar spine surgery, and numerous reports have demonstrated its advantages. To the best of our knowledge, no group has specifically reported on the use of spinal anesthesia in thoracic-level spine surgeries because there is a hypothetical risk of injuring the conus medullaris at these levels. With the advantages of spinal anesthesia and the desire for many elderly patients to avoid general anesthesia, our group has uniquely explored the use of this modality on select patients with thoracic pathology requiring surgical intervention. OBJECTIVE To investigate the feasibility of performing thoracic-level spinal surgeries under spinal anesthesia and report our experience with 3 patients. METHODS A retrospective chart review of medical records was undertaken, involving clinical notes, operative notes, and anesthesia records. RESULTS Three spinal stenosis patients underwent thoracic laminectomy under spinal anesthesia. Two surgeries were performed at the T11-T12 level and 1 at the T12-L1 level. The average age was 82 years, average American Society of Anesthesiologists score was 3.3, and 1 identified as female. Two cases used hyperbaric 0.75% bupivacaine dissolved in dextrose, and 1 used isobaric 0.5% bupivacaine dissolved in water. CONCLUSION Spinal anesthesia is feasible for thoracic-level spine procedures, even in elderly patients with comorbidities. We describe our cases and technique for safely achieving a thoracic level of analgesia, as well as discuss recommendations, adverse events, and considerations for the use of spinal anesthesia during lower thoracic-level spine operations.
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Affiliation(s)
- Andy Y. Wang
- Department of Neurosurgery, Tufts Medical Center, Boston, Massachusetts, USA;
| | - Penny Liu
- Department of Anesthesiology, Tufts Medical Center, Boston, Massachusetts, USA
| | - Konstantin Balonov
- Department of Anesthesiology, Tufts Medical Center, Boston, Massachusetts, USA
| | - Ron Riesenburger
- Department of Neurosurgery, Tufts Medical Center, Boston, Massachusetts, USA;
| | - James Kryzanski
- Department of Neurosurgery, Tufts Medical Center, Boston, Massachusetts, USA;
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Sahai SK, Balonov K, Bentov N, Bierle DMM, Browning LM, Cummings KC, Dougan BM, Maxwell M, Merli GJ, Oprea AD, Sweitzer B, Mauck KF, Urman RD. Preoperative Management of Cardiovascular Medications: A Society for Perioperative Assessment and Quality Improvement (SPAQI) Consensus Statement. Mayo Clin Proc 2022; 97:1734-1751. [PMID: 36058586 DOI: 10.1016/j.mayocp.2022.03.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 01/19/2022] [Accepted: 03/21/2022] [Indexed: 10/14/2022]
Abstract
Cardiovascular conditions such as hypertension, arrhythmias, and heart failure are common in patients undergoing anesthesia for surgical or other procedures. Numerous guidelines from various specialty societies offer variable recommendations for the perioperative management of these medications. The Society for Perioperative Assessment and Quality Improvement identified a need to provide multidisciplinary evidence-based recommendations for preoperative medication management. The society convened a group of 13 members with expertise in perioperative medicine and training in anesthesiology or internal medicine. The aim of this consensus effort is to provide perioperative clinicians with guidance on the management of cardiovascular medications commonly encountered during the preoperative evaluation. We used a modified Delphi process to establish consensus. Twenty-one classes of medications were identified: α-adrenergic receptor antagonists, angiotensin-converting enzyme inhibitors, angiotensin II receptor blockers, angiotensin receptor-neprilysin inhibitors, β-adrenoceptor blockers, calcium-channel blockers, centrally acting sympatholytic medications, direct-acting vasodilators, loop diuretics, thiazide diuretics, potassium-sparing diuretics, endothelin receptor antagonists, cardiac glycosides, nitrodilators, phosphodiesterase-5 inhibitors, class III antiarrhythmic agents, potassium-channel openers, renin inhibitors, class I antiarrhythmic agents, sodium-channel blockers, and sodium glucose cotransportor-2 inhibitors. We provide recommendations for the management of these medications preoperatively.
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Affiliation(s)
- Sunil K Sahai
- Department of Internal Medicine, The University of Texas Medical Branch at Galveston, Galveston, TX.
| | - Konstantin Balonov
- Department of Anesthesiology and Perioperative Medicine, Tufts University School of Medicine, Boston, MA
| | - Nathalie Bentov
- Department of Family Medicine, University of Washington, Seattle, WA
| | | | | | | | - Brian M Dougan
- Division of General Internal Medicine, Mayo Clinic, Rochester, MN
| | - Megan Maxwell
- Department of Anesthesiology and Pain Management, The University of Texas Southwestern Medical Center, Dallas, TX
| | - Geno J Merli
- Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, PA
| | - Adriana D Oprea
- Department of Anesthesiology, Yale School of Medicine, New Haven, CT
| | - BobbieJean Sweitzer
- University of Virginia School of Medicine, Charlottesville, VAkInova Health Systems, Falls Church, VA; Inova Health Systems, Falls Church, VA
| | - Karen F Mauck
- Division of General Internal Medicine, Mayo Clinic, Rochester, MN
| | - Richard D Urman
- Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
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Keenan C, Wang AY, Balonov K, Kryzanski J. Postoperative vasovagal cardiac arrest after spinal anesthesia for lumbar spine surgery. Surg Neurol Int 2022; 13:42. [PMID: 35242408 PMCID: PMC8888311 DOI: 10.25259/sni_25_2022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 01/13/2022] [Indexed: 11/04/2022] Open
Abstract
Background:
Spinal anesthesia is being increasingly recognized as a favorable alternative to general anesthesia. However, there are still several considerations for its safe and effective use.
Case Description:
A 62-year-old male received spinal anesthesia during an uneventful L3-L5 decompressive laminectomy. However, he subsequently experienced a brief episode of pulseless electrical activity in the post-anesthesia care unit, and was successfully resuscitated without further sequelae. This was attributed to a vasovagal episode, with his notable prior history of experiencing vasovagal syncope with lightheadedness and fainting at the sight of blood.
Conclusion:
Patients with a history of vasovagal syncope may be predisposed to experiencing brief potentiated episodes of severe bradycardia and even cardiac arrest following spinal anesthesia.
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Affiliation(s)
- Caitlin Keenan
- Department of Neurosurgery, Tufts Medical Center, Washington, Boston, United States
| | - Andy Y. Wang
- Department of Neurosurgery, Tufts Medical Center, Washington, Boston, United States
| | - Konstantin Balonov
- Department of Anesthesiology, Tufts Medical Center, Washington, Boston, United States
| | - James Kryzanski
- Department of Neurosurgery, Tufts Medical Center, Washington, Boston, United States
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Balonov K. Intraoperative protective lung ventilation strategies in patients with morbid obesity. Saudi J Anaesth 2022; 16:327-331. [PMID: 35898523 PMCID: PMC9311182 DOI: 10.4103/sja.sja_386_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 05/14/2022] [Indexed: 11/21/2022] Open
Abstract
Postoperative pulmonary complications (PPCs) occur frequently and are associated with a prolonged hospital stay, increased mortality, and high costs. Patients with morbid obesity are at higher risk of perioperative complications, in particular associated with those related to respiratory function. One of the most prominent concerns of the anesthesiologists while taking care of the patient with obesity in the perioperative setting should be the status of the lung and delivery of mechanical ventilation as its strategy affects clinical outcomes. Negative effects of mechanical ventilation on the respiratory system known as ventilator-induced lung injury include barotrauma, volutrauma, and atelectrauma. However, the optimal regimen of mechanical ventilation still remains a matter of debate. While low tidal volume (VT) strategy has become a widely accepted standard of care, the protective role of PEEP and recruitment maneuvers is less clear. This review focuses on the pathophysiology of respiratory function in patients with morbid obesity, the effects of mechanical ventilation on the lungs, and optimal intraoperative strategy based on the current state of knowledge.
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Nail TJ, Dowd RS, Liu P, Balonov K, Kryzanski J. Single-center series report of transforaminal lumbar interbody fusions under spinal anesthesia. Interdisciplinary Neurosurgery 2021. [DOI: 10.1016/j.inat.2021.101112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Anwar K, Alpertugna I, Detelich D, Balonov K, Tarnoff M, Vercollone J, Siegel RD, Tischler AS, Lechan RM. Looking Beyond Diabetes: A Case of Worsening Hyperglycemia as a Manifestation of Ectopic Cushing’s Syndrome Secondary to an Adrenocorticotropic Hormone-Producing Pheochromocytoma. J Endocr Soc 2021. [PMCID: PMC8089932 DOI: 10.1210/jendso/bvab048.284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
A 76-year-old woman presented with worsening fasting hyperglycemia on routine blood sugar measurement, previously well-controlled on Metformin, requiring initiation of insulin. Her medical history included type 2 diabetes mellitus, hypertension, and aortic stenosis. Over the next few weeks, she developed bilateral upper and lower extremity proximal muscle weakness, episodes of confusion, rapid weight loss and increasing lower extremity edema. She did not have typical Cushingoid features of moon facies, easy bruising, centripetal obesity, abdominal striae, dorsocervical fat padding, or hyperpigmentation. Laboratory data revealed severe hypokalemia, elevated cortisol of 138 (3.7–19.4 ug/dL) and ACTH of 368 (6–50 pg/mL) consistent with ACTH-dependent Cushing’s syndrome. She was hospitalized for emergent therapy with etomidate infusion, potassium supplementation, and started on spironolactone. 24-hour urinary analysis demonstrated elevated catecholamines and metanephrines: epinephrine 552 (2–16 mcg/g cr), norepinephrine 1881 (7-5 mcg/g cr), metanephrine 4095 (21–153 mcg/g cr), normetanephrine 3920 (108–524 mcg/g cr). CT abdomen showed 3.8 cm mass in the left adrenal gland with enhancing walls and central hypoattenuation and a normal contralateral adrenal gland. MR brain showed a partial empty sella without any mass. 123I-metaiodobenzylguanidine scintigraphy showed uptake in the left adrenal mass. Once cortisol was reduced to <25 ug/dL, she was transitioned from etomidate to metyrapone; alpha-methyltyrosine and prazosin was also begun. Following left laparoscopic adrenalectomy, ACTH decreased to <5 pg/mL confirming that the pheochromocytoma was the source of ectopic Cushing’s. Gross examination of the mass was notable for a spongy, tan, roughly spherical medullary neoplasm (3 cm in diameter) with a rim of brown and focally yellow adrenal cortex up to 4 mm thick. Marked diffuse adrenal cortical hyperplasia was noted. The tumor showed varied growth patterns, including solid areas and spongy, angioma-like areas with prominent small blood vessels. Immunohistochemical staining was positive for somatostatin receptor 2A, tyrosine hydroxylase and ACTH in tumor cells and negative for T-PIT. She was discharged on replacement hydrocortisone therapy, minimal insulin for diabetes and has shown substantial clinical improvement. Cushing’s syndrome due to ectopic ACTH-producing pheochromocytoma is rare. Worsening hyperglycemia in the presence of hypertension, even without typical clinical findings of Cushing’s, should prompt further hormonal work up. The absence of the transcription factor TPIT, which is a lineage determinant for pituitary corticotrophs, suggests that novel pathways are involved in differentiation of cells that produce ectopic ACTH.
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Hübner M, Kusamura S, Villeneuve L, Al-Niaimi A, Alyami M, Balonov K, Bell J, Bristow R, Guiral DC, Fagotti A, Falcão LFR, Glehen O, Lambert L, Mack L, Muenster T, Piso P, Pocard M, Rau B, Sgarbura O, Somashekhar SP, Wadhwa A, Altman A, Fawcett W, Veerapong J, Nelson G. Guidelines for Perioperative Care in Cytoreductive Surgery (CRS) with or without hyperthermic IntraPEritoneal chemotherapy (HIPEC): Enhanced recovery after surgery (ERAS®) Society Recommendations - Part I: Preoperative and intraoperative management. Eur J Surg Oncol 2020; 46:2292-2310. [PMID: 32873454 DOI: 10.1016/j.ejso.2020.07.041] [Citation(s) in RCA: 80] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 07/14/2020] [Accepted: 07/28/2020] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND Enhanced recovery after surgery (ERAS) pathways have been shown to considerably reduce complications, length of stay and costs after most of surgical procedures by standardised application of best evidence-based perioperative care. The aim was to elaborate dedicated recommendations for cytoreductive surgery (CRS) ± hyperthermic intraperitoneal chemotherapy (HIPEC) in a two-part series of guidelines based on expert consensus. The present part I of the guidelines highlights preoperative and intraoperative management. METHODS The core group assembled a multidisciplinary panel of 24 experts involved in peritoneal surface malignancy surgery representing the fields of general surgery (n = 12), gynaecological surgery (n = 6), and anaesthesia (n = 6). Experts systematically reviewed and summarized the available evidence on 72 identified perioperative care items, following the GRADE (grading of recommendations, assessment, development, evaluation) system. Final consensus (defined as ≥50%, or ≥70% of weak/strong recommendations combined) was reached by a standardised 2-round Delphi process, regarding the strength of recommendations. RESULTS Response rates were 100% for both Delphi rounds. Quality of evidence was evaluated high, moderate low and very low, for 15 (21%), 26 (36%), 29 (40%) and 2 items, respectively. Consensus was reached for 71/72(98.6%) items. Strong recommendations were defined for 37 items, No consensus could be reached regarding the preemptive use of fresh frozen plasma. CONCLUSION The present ERAS recommendations for CRS±HIPEC are based on a standardised expert consensus process providing clinicians with valuable guidance. There is an urgent need to produce high quality studies for CRS±HIPEC and to prospectively evaluate recommendations in clinical practice.
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Affiliation(s)
- Martin Hübner
- Department of Visceral Surgery, Lausanne University Hospital CHUV, University of Lausanne (UNIL), Switzerland.
| | - Shigeki Kusamura
- Peritoneal Surface Malignancy Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Laurent Villeneuve
- Clinical Research and Epidemiological Unit, Department of Public Health, Lyon University Hospital, EA 3738, University of Lyon, Lyon, France
| | - Ahmed Al-Niaimi
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of Wisconsin School of Medicine and Public Health, Madison, USA
| | - Mohammad Alyami
- Department of General Surgery and Surgical Oncology, King Faisal Specialist Hospital & Research Center, Riyadh, Saudi Arabia
| | - Konstantin Balonov
- Department of Anesthesiology and Perioperative Medicine, Tufts Medical Center, Boston, USA
| | - John Bell
- Department of Anesthesiology, Basingstoke and North Hampshire Hospital, Basingstoke, UK
| | - Robert Bristow
- Department of Obstetrics and Gynecologic Oncology, University of California, Irvine School of Medicine, Orange, USA
| | - Delia Cortés Guiral
- Department of General Surgery (Peritoneal Surface Surgical Oncology). University Hospital Principe de Asturias, Alcalá de Henares, Madrid, Spain
| | - Anna Fagotti
- Fondazione Policlinico Universitario Agostino Gemelli, IRCCS, Catholic University of the Sacred Heart, 00168, Rome, Italy
| | - Luiz Fernando R Falcão
- Discipline of Anesthesiology, Pain and Critical Care Medicine, Federal University of Sao Paulo, Sao Paulo, Brazil
| | - Olivier Glehen
- Department of Digestive Surgery, Lyon University Hospital, EA 3738, University of Lyon, Lyon, France
| | - Laura Lambert
- Peritoneal Surface Malignancy Program, Section of Surgical Oncology, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT, USA
| | - Lloyd Mack
- Department of Surgical Oncology, University of Calgary, Calgary, Alberta, Canada
| | - Tino Muenster
- Department of Anaesthesiology and Intensive Care Medicine. Hospital Barmherzige Brüder, Regensburg, Germany
| | - Pompiliu Piso
- Department of General and Visceral Surgery, Hospital Barmherzige Brüder, Regensburg, Germany
| | - Marc Pocard
- Department of Digestive Surgery, Lariboisière University Hospital, Paris, France
| | - Beate Rau
- Department of Surgery, Campus Virchow-Klinikum and Charité Campus Mitte, Charité-Universitätsmedizin Berlin, Germany
| | - Olivia Sgarbura
- Department of Surgical Oncology, Cancer Institute Montpellier (ICM), University of Montpellier, Montpellier, France
| | - S P Somashekhar
- Department of Surgical Oncology, Manipal Comprehensive Cancer Centre, Manipal Hospital, Bengaluru, India
| | - Anupama Wadhwa
- Department of Anesthesiology, University of California San Diego, La Jolla, CA, USA
| | - Alon Altman
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of Manitoba, Winnipeg, Canada
| | - William Fawcett
- Anaesthesia and Pain Medicine, Royal Surrey County Hospital NHS Foundation Trust, Guildford, UK
| | - Jula Veerapong
- Department of Surgery, Division of Surgical Oncology, University of California San Diego, La Jolla, CA, USA
| | - Gregg Nelson
- Division of Gynecologic Oncology, Tom Baker Cancer Centre, University of Calgary, Calgary, Alberta, Canada
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Borges FK, Bhandari M, Guerra-Farfan E, Patel A, Sigamani A, Umer M, Tiboni ME, Villar-Casares MDM, Tandon V, Tomas-Hernandez J, Teixidor-Serra J, Avram VRA, Winemaker M, Ramokgopa MT, Szczeklik W, Landoni G, Wang CY, Begum D, Neary JD, Adili A, Sancheti PK, Lawendy AR, Balaguer-Castro M, Ślęczka P, Jenkinson RJ, Nur AN, Wood GCA, Feibel RJ, McMahon SJ, Sigamani A, Popova E, Biccard BM, Moppett IK, Forget P, Landais P, McGillion MH, Vincent J, Balasubramanian K, Harvey V, Garcia-Sanchez Y, Pettit SM, Gauthier LP, Guyatt GH, Conen D, Garg AX, Bangdiwala SI, Belley-Cote EP, Marcucci M, Lamy A, Whitlock R, Le Manach Y, Fergusson DA, Yusuf S, Devereaux PJ, Veevaete L, le Polain de Waroux B, Lavand'homme P, Cornu O, Tribak K, Yombi JC, Touil N, Reul M, Bhutia JT, Clinckaert C, De Clippeleir D, Reul M, Patel A, Tandon V, Gauthier LP, Avram VRA, Winemaker M, de Beer J, Simpson DL, Worster A, Alvarado KA, Gregus KK, Lawrence KH, Leong DP, Joseph PG, Magloire P, Deheshi B, Bisland S, Wood TJ, Tushinski DM, Wilson DAJ, Kearon C, Le Manach Y, Adili A, Tiboni ME, Neary JD, Cowan DD, Khanna V, Zaki A, Farrell JC, MacDonald AM, Conen D, Wong SCW, Karbassi A, Wright DS, Shanthanna H, Coughlin R, Khan M, Wikkerink S, Quraishi FA, Lawendy AR, Kishta W, Schemitsch E, Carey T, Macleod MD, Sanders DW, Vasarhelyi E, Bartley D, Dresser GK, Tieszer C, Jenkinson RJ, Shadowitz S, Lee JS, Choi S, Kreder HJ, Nousiainen M, Kunz MR, Tuazon R, Shrikumar M, Ravi B, Wasserstein D, Stephen DJG, Nam D, Henry PDG, Wood GCA, Mann SM, Jaeger MT, Sivilotti MLA, Smith CA, Frank CC, Grant H, Ploeg L, Yach JD, Harrison MM, Campbell AR, Bicknell RT, Bardana DD, Feibel RJ, McIlquham K, Gallant C, Halman S, Thiruganasambandamoorth V, Ruggiero S, Hadden WJ, Chen BPJ, Coupal SA, McMahon SJ, McLean LM, Shirali HR, Haider SY, Smith CA, Watts E, Santone DJ, Koo K, Yee AJ, Oyenubi AN, Nauth A, Schemitsch EH, Daniels TR, Ward SE, Hall JA, Ahn H, Whelan DB, Atrey A, Khoshbin A, Puskas D, Droll K, Cullinan C, Payendeh J, Lefrancois T, Mozzon L, Marion T, Jacka MJ, Greene J, Menon M, Stiegelmahr R, Dillane D, Irwin M, Beaupre L, Coles CP, Trask K, MacDonald S, Trenholm JAI, Oxner W, Richardson CG, Dehghan N, Sadoughi M, Sharma A, White NJ, Olivieri L, Hunt SB, Turgeon TR, Bohm ER, Tran S, Giilck SM, Hupel T, Guy P, O'Brien PJ, Duncan AW, Crawford GA, Zhou J, Zhao Y, Liu Y, Shan L, Wu A, Muñoz JM, Chaudier P, Douplat M, Fessy MH, Piriou V, Louboutin L, David JS, Friggeri A, Beroud S, Fayet JM, Landais P, Leung FKL, Fang CX, Yee DKH, Sancheti PK, Pradhan CV, Patil AA, Puram CP, Borate MP, Kudrimoti KB, Adhye BA, Dongre HV, John B, Abraham V, Pandey RA, Rajkumar A, George PE, Sigamani A, Stephen M, Chandran N, Ashraf M, Georgekutty AM, Sulthan AS, Adinarayanan S, Sharma D, Barnawal SP, Swaminathan S, Bidkar PU, Mishra SK, Menon J, M N, K VZ, Hiremath SA, NC M, Jawali A, Gnanadurai KR, George CE, Maddipati T, KP MKP, Sharma V, Farooque K, Malhotra R, Mittal S, Sawhney C, Gupta B, Mathur P, Gamangati S, Tripathy V, Menon PH, Dhillon MS, Chouhan DK, Patil S, Narayan R, Lal P, Bilchod PN, Singh SU, Gattu UV, Dashputra RP, Rahate PV, Turiel M, De Blasio G, Accetta R, Perazzo P, Stella D, Bonadies M, Colombo C, Fozzato S, Pino F, Morelli I, Colnaghi E, Salini V, Denaro G, Beretta L, Placella G, Giardina G, Binda M, Marcato A, Guzzetti L, Piccirillo F, Cecconi M, Khor HM, Lai HY, Kumar CS, Chee KH, Loh PS, Tan KM, Singh S, Foo LL, Prakasam K, Chaw SH, Lee ML, Ngim JHL, Boon HW, Chin II, Kleinlugtenbelt YV, Landman EBM, Flikweert ER, Roerdink HW, Brokelman RB, Elskamp-Meijerman HF, Horst MR, Cobben JHMG, Umer M, Begum D, Anjum A, Hashmi PM, Ahmed T, Rashid HU, Khattak MJ, Rashid RH, Lakdawala RH, Noordin S, Juman NM, Khan RI, Riaz MM, Bokhari SS, Almas A, Wahab H, Ali A, Khan HN, Khan EK, Nur AN, Janjua KA, Orakzai SH, Khan AS, Mustafa KJ, Sohail MA, Umar M, Khan SA, Ashraf M, Khan MK, Shiraz M, Furgan A, Ślęczka P, Dąbek P, Kumoń A, Satora W, Ambroży W, Święch M, Rycombel J, Grzelak A, Gucwa J, Machala W, Ramokgopa MT, Firth GB, Karera M, Fourtounas M, Singh V, Biscardi A, Iqbal MN, Campbell RJ, Maluleke ML, Moller C, Nhlapo L, Maqungo S, Flint M, Nejthardt MB, Chetty S, Naidoo R, Guerra-Farfan E, Tomas-Hernandez J, Garcia-Sanchez Y, Garrido Clua M, Molero-Garcia V, Minguell-Monyart J, Teixidor-Serra J, Villar-Casares MDM, Selga Marsa J, Porcel-Vazquez JA, Andres-Peiro JV, Aguilar M, Mestre-Torres J, Colomina MJ, Guilabert P, Paños Gozalo ML, Abarca L, Martin N, Usua G, Martinez-Ripol P, Gonzalez Posada MA, Lalueza-Broto P, Sanchez-Raya J, Nuñez Camarena J, Fraguas-Castany A, Balaguer-Castro M, Torner P, Jornet-Gibert M, Serrano-Sanz J, Cámara-Cabrera J, Salomó-Domènech M, Yela-Verdú C, Peig-Font A, Ricol L, Carreras-Castañer A, Martínez-Sañudo L, Herranz S, Feijoo-Massó C, Sianes-Gallén M, Castillón P, Bernaus M, Quintas S, Gómez O, Salvador J, Abarca J, Estrada C, Novellas M, Torra M, Dealbert A, Macho O, Ivanov A, Valldosera E, Arroyo M, Pey B, Yuste A, Mateo L, De Caso J, Anaya R, Higa-Sansone JL, Millan A, Baños V, Herrera-Mateo S, Aguado HJ, Martinez-Municio G, León R, Santiago-Maniega S, Zabalza A, Labrador G, Guerado E, Cruz E, Cano JR, Bogallo JM, Sa-ngasoongsong P, Kulachote N, Sirisreetreerux N, Pengrung N, Chalacheewa T, Arnuntasupakul V, Yingchoncharoen T, Naratreekoon B, Kadry MA, Thayaparan S, Abdlaziz I, Aframian A, Imbuldeniya A, Bentoumi S, Omran S, Vizcaychipi MP, Correia P, Patil S, Haire K, Mayor ASE, Dillingham S, Nicholson L, Elnaggar M, John J, Nanjayan SK, Parker MJ, O'Sullivan S, Marmor MT, Matityahu A, McClellan RT, Comstock C, Ding A, Toogood P, Slobogean G, Joseph K, O'Toole R, Sciadini M, Ryan SP, Clark ME, Cassidy C, Balonov K, Bergese SD, Phieffer LS, Gonzalez Zacarias AA, Marcantonio AJ, Devereaux PJ, Bhandari M, Borges FK, Balasubramanian K, Bangdiwala SI, Harvey V, McGillion MH, Pettit SM, Vincent J, Vincent J, Harvey V, Dragic-Taylor S, Maxwell C, Molnar S, Pettit SM, Wells JR, Forget P, Borges FK, Landais P, Sigamani A, Landoni G, Wang CY, Szczeklik W, Biccard BM, Popova E, Moppett IK, Lamy A, Whitlock R, Ofori SN, Yang SS, Wang MK, Duceppe E, Spence J, Vasquez JP, Marcano-Fernández F, Conen D, Ham H, Tiboni ME, Prada C, Yung TCH, Sanz Pérez I, Neary JD, Bosch MJ, Prystajecky MR, Chowdhury C, Khan JS, Belley-Cote EP, Stella SF, Marcucci M, Heidary B, Tran A, Wawrzycka-Adamczyk K, Chen YCP, Tandon V, González-Osuna A, Patel A, Biedroń G, Wludarczyk A, Lefebvre M, Ernst JA, Staffhorst B, Woodfine JD, Alwafi EM, Mrkobrada M, Parlow S, Roberts R, McAlister F, Sackett D, Wright J. Accelerated surgery versus standard care in hip fracture (HIP ATTACK): an international, randomised, controlled trial. Lancet 2020; 395:698-708. [PMID: 32050090 DOI: 10.1016/s0140-6736(20)30058-1] [Citation(s) in RCA: 163] [Impact Index Per Article: 40.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 01/06/2020] [Accepted: 01/07/2020] [Indexed: 02/08/2023]
Abstract
BACKGROUND Observational studies have suggested that accelerated surgery is associated with improved outcomes in patients with a hip fracture. The HIP ATTACK trial assessed whether accelerated surgery could reduce mortality and major complications. METHODS HIP ATTACK was an international, randomised, controlled trial done at 69 hospitals in 17 countries. Patients with a hip fracture that required surgery and were aged 45 years or older were eligible. Research personnel randomly assigned patients (1:1) through a central computerised randomisation system using randomly varying block sizes to either accelerated surgery (goal of surgery within 6 h of diagnosis) or standard care. The coprimary outcomes were mortality and a composite of major complications (ie, mortality and non-fatal myocardial infarction, stroke, venous thromboembolism, sepsis, pneumonia, life-threatening bleeding, and major bleeding) at 90 days after randomisation. Patients, health-care providers, and study staff were aware of treatment assignment, but outcome adjudicators were masked to treatment allocation. Patients were analysed according to the intention-to-treat principle. This study is registered at ClinicalTrials.gov (NCT02027896). FINDINGS Between March 14, 2014, and May 24, 2019, 27 701 patients were screened, of whom 7780 were eligible. 2970 of these were enrolled and randomly assigned to receive accelerated surgery (n=1487) or standard care (n=1483). The median time from hip fracture diagnosis to surgery was 6 h (IQR 4-9) in the accelerated-surgery group and 24 h (10-42) in the standard-care group (p<0·0001). 140 (9%) patients assigned to accelerated surgery and 154 (10%) assigned to standard care died, with a hazard ratio (HR) of 0·91 (95% CI 0·72 to 1·14) and absolute risk reduction (ARR) of 1% (-1 to 3; p=0·40). Major complications occurred in 321 (22%) patients assigned to accelerated surgery and 331 (22%) assigned to standard care, with an HR of 0·97 (0·83 to 1·13) and an ARR of 1% (-2 to 4; p=0·71). INTERPRETATION Among patients with a hip fracture, accelerated surgery did not significantly lower the risk of mortality or a composite of major complications compared with standard care. FUNDING Canadian Institutes of Health Research.
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Moreno-Duarte I, Montenegro J, Balonov K, Schumann R. Increased Resistance to Flow and Ventilator Failure Secondary to Faulty CO2 Absorbent Insert Not Detected During Automated Anesthesia Machine Check: A Case Report. ACTA ACUST UNITED AC 2017; 8:192-196. [PMID: 28151764 DOI: 10.1213/xaa.0000000000000464] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Most modern anesthesia workstations provide automated checkout, which indicates the readiness of the anesthesia machine. In this case report, an anesthesia machine passed the automated machine checkout. Minutes after the induction of general anesthesia, we observed a mismatch between the selected and delivered tidal volumes in the volume auto flow mode with increased inspiratory resistance during manual ventilation. Endotracheal tube kinking, circuit obstruction, leaks, and patient-related factors were ruled out. Further investigation revealed a broken internal insert within the CO2 absorbent canister that allowed absorbent granules to cause a partial obstruction to inspiratory and expiratory flow triggering contradictory alarms. We concluded that even when the automated machine checkout indicates machine readiness, unforeseen equipment failure due to unexpected events can occur and require providers to remain vigilant.
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Affiliation(s)
- Ingrid Moreno-Duarte
- From the Department of Anesthesiology & Perioperative Medicine, Tufts Medical Center, Boston, Massachusetts
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14
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Balonov K, Miller AD, Lisbon A, Kaynar AM. A novel method of continuous measurement of head of bed elevation in ventilated patients. Intensive Care Med 2007; 33:1050-4. [PMID: 17393138 DOI: 10.1007/s00134-007-0616-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2006] [Accepted: 03/01/2007] [Indexed: 11/28/2022]
Abstract
OBJECTIVE We developed a novel pressure transducer-based method of continuous measurement of head of bed elevation. Following validation of the method we hypothesized that head of bed angles would be at or above 30 degrees among mechanically ventilated patients throughout the day due to a hospital-wide initiative on ventilator-associated pneumonia prevention and standardized electronic order entry system to keep head of bed at an angle of 30 degrees or greater. DESIGN AND SETTING Prospective observational study in university hospital intensive care units. PATIENTS AND PARTICIPANTS Twenty-nine consecutive mechanically ventilated patients with no contraindications for semirecumbency. MEASUREMENTS AND RESULTS We acquired 113 pairs of measurements on unused beds for validation of the method at angles between 3 degrees and 70 degrees. Correlation between transducer and protractor was fitted into a linear regression model (R2 = 0.98) with minimal variation of data along the line of equality. Bland-Altman analysis showed a mean difference of 1.6 degrees +/- 1.6 degrees. Ninety-six percent of differences were within 2 SD from the mean. This method was then used among 29 intubated patients to collect head of bed data over a 24-h period for 3 consecutive days. Contrary to our hypothesis, all patients had head of bed angles less than 30 degrees. CONCLUSIONS Our results suggest that this method could be used with high reliability and patients in our institution were not kept even at 30 degrees. The results are in accord with those of a recent study which found that continued maintenance of previously suggested head of bed angles was difficult to attain clinically. This may lead us to reevaluate methods studying the impact of head of bed elevation in VAP prevention.
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Affiliation(s)
- Konstantin Balonov
- Department of Anesthesiology, Boston Medical Center, 88 E. Newton St. Atrium, Boston 02118, MA, USA
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Balonov K, Khodorova A, Strichartz GR. Tactile allodynia initiated by local subcutaneous endothelin-1 is prolonged by activation of TRPV-1 receptors. Exp Biol Med (Maywood) 2006; 231:1165-70. [PMID: 16741070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/09/2023] Open
Abstract
Subcutaneous endothelin-1 (ET-1; 200 microM, 2 nmoles/paw) injected into the rat hind paw, has been shown to cause robust hind paw flinching (HPF) and paw licking, and to induce impulses selectively in primary nociceptors. Here we report that a much lower [ET-1] sensitizes the paw to a nocifensive withdrawal response to tactile stimulation (by von Frey hairs, VFH), a sensitization that involves local TRPV1 receptors. Injection of 10 microM ET-1 (0.1 nmole/paw) causes only marginal HPF but rapidly (20 mins after injection) lowers the force threshold for paw withdrawal (PWT) to VFH, to approximately 30% of pre-injection baseline. Such tactile allodynia persists for 3 hrs. In rats pre-injected with the TRPV1-antagonists capsazepine (CPZ; 1.33 mM) or 5'-iodoresiniferatoxin (I-RTX; 0.13 microM), 15 min before ET-1, a fast initial drop in PWT, as with ET-1 alone, occurs (to 40% or to 19% of baseline, respectively), but this earliest reduction then regresses back to the pre-injection PWT value more rapidly than with ET-1 alone. The recovery of allodynia from the maximum value is about two times faster for ET-1+CPZ and about 4 times faster for ET-1+ I-RTX, compared with that from ET-1 +vehicle (t(1/2) = 130, 60, and 250 mins, respectively). In contrast, spontaneous pain indicated by overt HPF from ET-1 is not attenuated by TRPV1 antagonists. Tactile allodynia is similarly abbreviated by antagonists of both ET(A) (BQ-123, 32 nmoles/paw) and ET(B) (BQ-788, 30 nmoles/paw) receptors, whereas HPF is abolished by this ET(A) antagonist but enhanced by the ET(B) antagonist. We conclude that low ET-1 causes tactile allodynia, which is characterized by a different time-course and pharmacology than ET-1-induced nociception, and that local TRPV1 receptors are involved in the maintenance of this ET-1-induced allodynia but not in the overt algesic action of ET-1.
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Affiliation(s)
- Konstantin Balonov
- Pain Research Center, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital, 75 Francis Street, Boston, Massachusetts 02115, USA
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