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Dietrich M, Özdemir B, Gruneberg D, Petersen C, Studier-Fischer A, von der Forst M, Schmitt FCF, Fiedler MO, Nickel F, Müller-Stich BP, Brenner T, Weigand MA, Uhle F, Schmidt K. Hyperspectral Imaging for the Evaluation of Microcirculatory Tissue Oxygenation and Perfusion Quality in Haemorrhagic Shock: A Porcine Study. Biomedicines 2021; 9:1829. [PMID: 34944645 PMCID: PMC8698916 DOI: 10.3390/biomedicines9121829] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 11/27/2021] [Accepted: 11/29/2021] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND The ultimate goal of haemodynamic therapy is to improve microcirculatory tissue and organ perfusion. Hyperspectral imaging (HSI) has the potential to enable noninvasive microcirculatory monitoring at bedside. METHODS HSI (Tivita® Tissue System) measurements of tissue oxygenation, haemoglobin, and water content in the skin (ear) and kidney were evaluated in a double-hit porcine model of major abdominal surgery and haemorrhagic shock. Animals of the control group (n = 7) did not receive any resuscitation regime. The interventional groups were treated exclusively with either crystalloid (n = 8) or continuous norepinephrine infusion (n = 7). RESULTS Haemorrhagic shock led to a drop in tissue oxygenation parameters in all groups. These correlated with established indirect markers of tissue oxygenation. Fluid therapy restored tissue oxygenation parameters. Skin and kidney measurements correlated well. High dose norepinephrine therapy deteriorated tissue oxygenation. Tissue water content increased both in the skin and the kidney in response to fluid therapy. CONCLUSIONS HSI detected dynamic changes in tissue oxygenation and perfusion quality during shock and was able to indicate resuscitation effectivity. The observed correlation between HSI skin and kidney measurements may offer an estimation of organ oxygenation impairment from skin monitoring. HSI microcirculatory monitoring could open up new opportunities for the guidance of haemodynamic management.
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Affiliation(s)
- Maximilian Dietrich
- Department of Anesthesiology, Heidelberg University Hospital, 69120 Heidelberg, Germany; (D.G.); (C.P.); (M.v.d.F.); (F.C.F.S.); (M.O.F.); (M.A.W.); (F.U.)
| | - Berkin Özdemir
- Department of General, Visceral and Transplantation Surgery, Heidelberg University Hospital, 69120 Heidelberg, Germany; (B.Ö.); (A.S.-F.); (F.N.); (B.P.M.-S.)
| | - Daniel Gruneberg
- Department of Anesthesiology, Heidelberg University Hospital, 69120 Heidelberg, Germany; (D.G.); (C.P.); (M.v.d.F.); (F.C.F.S.); (M.O.F.); (M.A.W.); (F.U.)
| | - Clara Petersen
- Department of Anesthesiology, Heidelberg University Hospital, 69120 Heidelberg, Germany; (D.G.); (C.P.); (M.v.d.F.); (F.C.F.S.); (M.O.F.); (M.A.W.); (F.U.)
| | - Alexander Studier-Fischer
- Department of General, Visceral and Transplantation Surgery, Heidelberg University Hospital, 69120 Heidelberg, Germany; (B.Ö.); (A.S.-F.); (F.N.); (B.P.M.-S.)
| | - Maik von der Forst
- Department of Anesthesiology, Heidelberg University Hospital, 69120 Heidelberg, Germany; (D.G.); (C.P.); (M.v.d.F.); (F.C.F.S.); (M.O.F.); (M.A.W.); (F.U.)
| | - Felix C. F. Schmitt
- Department of Anesthesiology, Heidelberg University Hospital, 69120 Heidelberg, Germany; (D.G.); (C.P.); (M.v.d.F.); (F.C.F.S.); (M.O.F.); (M.A.W.); (F.U.)
| | - Mascha O. Fiedler
- Department of Anesthesiology, Heidelberg University Hospital, 69120 Heidelberg, Germany; (D.G.); (C.P.); (M.v.d.F.); (F.C.F.S.); (M.O.F.); (M.A.W.); (F.U.)
| | - Felix Nickel
- Department of General, Visceral and Transplantation Surgery, Heidelberg University Hospital, 69120 Heidelberg, Germany; (B.Ö.); (A.S.-F.); (F.N.); (B.P.M.-S.)
| | - Beat Peter Müller-Stich
- Department of General, Visceral and Transplantation Surgery, Heidelberg University Hospital, 69120 Heidelberg, Germany; (B.Ö.); (A.S.-F.); (F.N.); (B.P.M.-S.)
| | - Thorsten Brenner
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Essen, University Duisburg-Essen, 45147 Essen, Germany; (T.B.); (K.S.)
| | - Markus A. Weigand
- Department of Anesthesiology, Heidelberg University Hospital, 69120 Heidelberg, Germany; (D.G.); (C.P.); (M.v.d.F.); (F.C.F.S.); (M.O.F.); (M.A.W.); (F.U.)
| | - Florian Uhle
- Department of Anesthesiology, Heidelberg University Hospital, 69120 Heidelberg, Germany; (D.G.); (C.P.); (M.v.d.F.); (F.C.F.S.); (M.O.F.); (M.A.W.); (F.U.)
| | - Karsten Schmidt
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Essen, University Duisburg-Essen, 45147 Essen, Germany; (T.B.); (K.S.)
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Brettner F, Heitzer M, Thiele F, Hulde N, Nussbaum C, Achatz S, Jacob M, Becker BF, Conzen P, Kilger E, Chappell D. Non-invasive evaluation of macro- and microhemodynamic changes during induction of general anesthesia – A prospective observational single-blinded trial. Clin Hemorheol Microcirc 2021; 77:1-16. [DOI: 10.3233/ch-190691] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND: Hypotension and bradycardia are known side effects of general anesthesia, while little is known about further macro- and microhemodynamic changes during induction. Intriguing is furthermore, why some patients require no vasopressor medication to uphold mean arterial pressure, while others need vasopressor support. OBJECTIVE: Determination of macro- and microhemodynamic changes during induction of general anesthesia. METHODS: We enrolled 150 female adults scheduled for gynaecological surgery into this prospective observational, single-blinded trial. Besides routinely measuring heart rate (HR) and mean arterial blood pressure (MAP), the non-invasive technique of thoracic electrical bioimpedance was applied to measure cardiac output (CO), cardiac index (CI), stroke volume (SV), stroke volume variability (SVV) and index of myocardial contractility (ICON) before induction of anesthesia, 7 times during induction, and, finally, after surgery in the recovery room. Changes in microcirculation were assessed using sidestream dark field imaging to establish the perfused boundary region (PBR), a validated gauge of glycocalyx health. Comparisons were made with Friedman’s or Wilcoxon test for paired data, and with Mann-Whitney-U test for unpaired data, with post-hoc corrections for multiple measurements by the Holm-Bonferroni method. RESULTS: 83 patients did not need vasopressor support, whereas 67 patients required therapy (norepinephrine, atropine or cafedrine/theodrenaline) to elevate MAP values to ≥70mmHg during induction, 54 of these receiving norepinephrine (NE) alone. Pre-interventional (basal) values of CO, CI, ICON, SV and SVV were all significantly lower in the group of patients later requiring NE (p < 0.04), whereas HR and MAP were identical for both groups. HR, MAP and CO decreased from baseline to 12 min after induction of general anesthesia in both the patients without and those with NE support. Heart rate decreased significantly by about 25% in both groups (–19 to –21 bpm). The median individual decrease of MAP amounted to –26.7% (19.7/33.3, p < 0.001) and –26.1% (11.6/33.2, p < 0.001), respectively, whereas for CO it was –40.7% (34.1/50.1, p < 0.001) and –43.5% (34.8/48.7). While these relative changes did not differ between the two groups, in absolute values there were significantly greater decreases in CO, CI, SV and ICON in the group requiring NE. Noteably, NE did not restore ICON or the other cardiac parameters to levels approaching those of the group without NE. PBR was measured in a total of 84 patients compiled from both groups, there being no intergroup differences. It increased 6.4% (p < 0.001) from pre-induction to the end of the operation, indicative of damage to microvascular glycocalyx. CONCLUSION: Non-invasive determination of CO provides additional hemodynamic information during anesthesia, showing that induction results in a significant decrease not only of MAP but also of CO and other cardiac factors at all timepoints compared to baseline values. The decrease of CO was greater than that of MAP and, in contrast to MAP, did not respond to NE. There was also no sign of a positive inotropic effect of NE in this situation. Support of MAP by NE must consequently result from an increase in peripheral arterial resistance, posing a risk for oxygen supply to tissue. In addition, general anesthesia and the operative stimulus lead to an impairment of the microcirculation.
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Affiliation(s)
- Florian Brettner
- Department of Anaesthesiology, University Hospital of Munich (LMU), Munich, Germany
- Department of Anesthesiology and Intensive Care Medicine, Brothers of Mercy Hospital Munich, Munich, Germany
| | - Markus Heitzer
- Department of Anaesthesiology, University Hospital of Munich (LMU), Munich, Germany
| | - Friederike Thiele
- Department of Anaesthesiology, University Hospital of Munich (LMU), Munich, Germany
| | - Nikolai Hulde
- Department of Anaesthesiology, University Hospital of Munich (LMU), Munich, Germany
| | - Claudia Nussbaum
- Dr. von Hauner Children’s Hospital, University Hospital of Munich (LMU), Munich, Germany
| | - Stefan Achatz
- Department of Anaesthesiology, University Hospital of Munich (LMU), Munich, Germany
| | - Matthias Jacob
- Department of Anesthesiology, Intensive Care Medicine and Pain Medicine, Brothers of Mercy Hospital St. Elizabeth in Straubing, Straubing, Germany
| | - Bernhard F. Becker
- Walter-Brendel-Centre of Experimental Medicine, Ludwig-Maximilians-University Munich (LMU), Planegg-Martinsried, Germany
| | - Peter Conzen
- Department of Anaesthesiology, University Hospital of Munich (LMU), Munich, Germany
| | - Erich Kilger
- Department of Anaesthesiology, University Hospital of Munich (LMU), Munich, Germany
| | - Daniel Chappell
- Department of Anaesthesiology, University Hospital of Munich (LMU), Munich, Germany
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Abstract
PURPOSE OF REVIEW Currently, the treatment of patients with shock is focused on the clinical symptoms of shock. In the early phase, this is usually limited to heart rate, blood pressure, lactate levels and urine output. However, as the ultimate goal of resuscitation is the improvement in microcirculatory perfusion the question is whether these currently used signs of shock and the improvement in these signs actually correspond to the changes in the microcirculation. RECENT FINDINGS Recent studies have shown that during the development of shock the deterioration in the macrocirculatory parameters are followed by the deterioration of microcirculatory perfusion. However, in many cases the restoration of adequate macrocirculatory parameters is frequently not associated with improvement in microcirculatory perfusion. This relates not only to the cause of shock, where there are some differences between different forms of shock, but also to the type of treatment. SUMMARY The improvement in macrohemodynamics during the resuscitation is not consistently followed by subsequent changes in the microcirculation. This may result in both over-resuscitation and under-resuscitation leading to increased morbidity and mortality. In this article the principles of coherence and the monitoring of the microcirculation are reviewed.
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Williams AM, Bhatti UF, Dennahy IS, Chtraklin K, Chang P, Graham NJ, Baccouche BM, Roy S, Harajli M, Zhou J, Nikolian VC, Deng Q, Tian Y, Liu B, Li Y, Hays GL, Hays JL, Alam HB. Complete and Partial Aortic Occlusion for the Treatment of Hemorrhagic Shock in Swine. J Vis Exp 2018:58284. [PMID: 30199035 PMCID: PMC6231876 DOI: 10.3791/58284] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Hemorrhage remains the leading cause of preventable deaths in trauma. Endovascular management of non-compressible torso hemorrhage has been at the forefront of trauma care in recent years. Since complete aortic occlusion presents serious concerns, the concept of partial aortic occlusion has gained a growing attention. Here, we present a large animal model of hemorrhagic shock to investigate the effects of a novel partial aortic balloon occlusion catheter and compare it with a catheter that works on the principles of complete aortic occlusion. Swine are anesthetized and instrumented in order to conduct controlled fixed-volume hemorrhage, and hemodynamic and physiological parameters are monitored. Following hemorrhage, aortic balloon occlusion catheters are inserted and inflated in the supraceliac aorta for 60 min, during which the animals receive whole-blood resuscitation as 20% of the total blood volume (TBV). Following balloon deflation, the animals are monitored in a critical care setting for 4 h, during which they receive fluid resuscitation and vasopressors as needed. The partial aortic balloon occlusion demonstrated improved distal mean arterial pressures (MAPs) during the balloon inflation, decreased markers of ischemia, and decreased fluid resuscitation and vasopressor use. As swine physiology and homeostatic responses following hemorrhage have been well-documented and are like those in humans, a swine hemorrhagic shock model can be used to test various treatment strategies. In addition to treating hemorrhage, aortic balloon occlusion catheters have become popular for their role in cardiac arrest, cardiac and vascular surgery, and other high-risk elective surgical procedures.
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Affiliation(s)
| | | | | | | | | | | | | | - Shalini Roy
- Department of Surgery, University of Michigan
| | | | - Jing Zhou
- Department of Surgery, University of Michigan
| | | | | | - Yuzi Tian
- Department of Surgery, University of Michigan
| | - Baoling Liu
- Department of Surgery, University of Michigan
| | - Yongqing Li
- Department of Surgery, University of Michigan
| | - Gregory L Hays
- Department of Surgery, University of Michigan; Hays Innovations
| | - Julia L Hays
- Department of Surgery, University of Michigan; Hays Innovations
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Some oscillatory phenomena of blood glucose regulation: An exploratory pilot study in pigs. PLoS One 2018; 13:e0194826. [PMID: 29608585 PMCID: PMC5880381 DOI: 10.1371/journal.pone.0194826] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Accepted: 03/09/2018] [Indexed: 01/20/2023] Open
Abstract
It is well-known that blood glucose oscillates with a period of approximately 15 min (900 s) and exhibits an overall complex behaviour in intact organisms. This complexity is not thoroughly studied, and thus, we aimed to decipher the frequency bands entailed in blood glucose regulation. We explored high-resolution blood glucose time-series sampled using a novel continuous intravascular sensor in four pigs under general anaesthesia for almost 24 hours. In all time series, we found several interesting oscillatory components, especially in the 5000–10000 s, 500–1000 s, and 50–100 s regions (0.0002–0.0001 Hz, 0.002–0.001 Hz, and 0.02–0.01 Hz). The presence of these oscillations is not permanent, as they come and go. This is the first report of glucose oscillations in the 50–100 s range. The origin of these oscillations and their role in overall blood glucose regulation is unknown. Although the sample size is small, we believe this finding is important for our understanding of glucose regulation and perhaps for our understanding of general homeostatic regulation in intact organisms.
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Langeland H, Lyng O, Aadahl P, Skjærvold NK. The coherence of macrocirculation, microcirculation, and tissue metabolic response during nontraumatic hemorrhagic shock in swine. Physiol Rep 2017; 5:5/7/e13216. [PMID: 28400499 PMCID: PMC5392510 DOI: 10.14814/phy2.13216] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 02/22/2017] [Accepted: 02/23/2017] [Indexed: 11/28/2022] Open
Abstract
Hemorrhagic shock is clinically observed as changes in macrocirculatory indices, while its main pathological constituent is cellular asphyxia due to microcirculatory alterations. The coherence between macro‐ and microcirculatory changes in different shock states has been questioned. This also applies to the hemorrhagic shock. Most studies, as well as clinical situations, of hemorrhagic shock include a “second hit” by tissue trauma. It is therefore unclear to what extent the hemorrhage itself contributes to this lack of circulatory coherence. Nine pigs in general anesthesia were exposed to a controlled withdrawal of 50% of their blood volume over 30 min, and then retransfusion over 20 min after 70 min of hypovolemia. We collected macrocirculatory variables, microcirculatory blood flow measurement by the fluorescent microspheres technique, as well as global microcirculatory patency by calculation of Pv‐aCO2, and tissue metabolism measurement by the use of microdialysis. The hemorrhage led to anticipated changes in macrocirculatory variables with a coherent change in microcirculatory and metabolic variables. In the late hemorrhagic phase, the animals' variables generally improved, probably through recruitment of venous blood reservoirs. After retransfusion, all variables were normalized and remained same throughout the study period. We find in our nontraumatic model consistent coherence between changes in macrocirculatory indices, microcirculatory blood flow, and tissue metabolic response during hemorrhagic shock and retransfusion. This indicates that severe, but brief, hemorrhage with minimal tissue injury is in itself not sufficient to cause lack of coherence between macro‐ and microcirculation.
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Affiliation(s)
- Halvor Langeland
- Department of Anesthesiology and Intensive Care Medicine, Trondheim University Hospital, Trondheim, Norway .,Department of Circulation and Medical Imaging, Faculty of Medicine Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - Oddveig Lyng
- Unit of Comparative Medicine, Faculty of Medicine Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - Petter Aadahl
- Department of Anesthesiology and Intensive Care Medicine, Trondheim University Hospital, Trondheim, Norway.,Department of Circulation and Medical Imaging, Faculty of Medicine Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - Nils-Kristian Skjærvold
- Department of Anesthesiology and Intensive Care Medicine, Trondheim University Hospital, Trondheim, Norway.,Department of Circulation and Medical Imaging, Faculty of Medicine Norwegian University of Science and Technology (NTNU), Trondheim, Norway
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