scholarly journals Assessment of Postnatal Pulmonary Adaption in Bovine Neonates Using Electric Impedance Tomography (EIT)

Animals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 3216
Author(s):  
Ulrich Bleul ◽  
Corina Wey ◽  
Carolina Meira ◽  
Andreas Waldmann ◽  
Martina Mosing
Keyword(s):  
Left Lung ◽  
Lung Ventilation ◽  
Electric Impedance ◽  
Electric Impedance Tomography ◽  
Impedance Tomography ◽  
Arterial Blood Gas ◽  
Arterial Blood ◽  
Gravity Driven ◽  
Neonatal Calves ◽  
The Right

Several aspects of postnatal pulmonary adaption in the bovine neonate remain unclear, particularly the dynamics and regional ventilation of the lungs. We used electric impedance tomography (EIT) to measure changes in ventilation in the first 3 weeks of life in 20 non-sedated neonatal calves born without difficulty in sternal recumbency. Arterial blood gas variables were determined in the first 24 h after birth. Immediately after birth, dorsal parts of the lungs had 4.53% ± 2.82% nondependent silent spaces (NSS), and ventral parts had 5.23% ± 2.66% dependent silent spaces (DSS). The latter increased in the first hour, presumably because of gravity-driven ventral movement of residual amniotic fluid. The remaining lung regions had good ventilation immediately after birth, and the percentage of lung regions with high ventilation increased significantly during the study period. The centre of ventilation was always dorsal to and on the right of the theoretical centre of ventilation. The right lung was responsible for a significantly larger proportion of ventilation (63.84% ± 12.74%, p < 0.00001) compared with the left lung. In the right lung, the centrodorsal lung area was the most ventilated, whereas, in the left lung, it was the centroventral area. Tidal impedance changes, serving as a surrogate for tidal volume, increased in the first 3 weeks of life (p < 0.00001). This study shows the dynamic changes in lung ventilation in the bovine neonate according to EIT measurements. The findings form a basis for the recognition of structural and functional lung disorders in neonatal calves.

scholarly journals Use of an Endobronchial Blocker and Selective Lung Ventilation to Aid Surgical Removal of a Lung Lobe Abscess in a Dog

2012 ◽  
Vol 2012 ◽  
pp. 1-4 ◽  
Author(s):  
Carl Bradbrook ◽  
Louise Clark ◽  
Martina Mosing
Keyword(s):  
Lung Ventilation ◽  
Blood Gas Analysis ◽  
Gas Analysis ◽  
Surgical Removal ◽  
Arterial Blood Gas ◽  
Lung Lobe ◽  
Lung Lobectomy ◽  
Arterial Blood ◽  
Endobronchial Blocker ◽  
The Right

This paper documents use of an endobronchial blocker (EBB) to achieve selective lung ventilation (SLV) for the purpose of lung lobectomy with thoracoscopy. A 3-year-old female neutered Labrador Retriever, body mass of 18.5 kg, was presented for exploratory thoracoscopy. Acepromazine and methadone were administered as premedication, and anaesthesia was induced with propofol and maintained with isoflurane in 100% oxygen and continuous infusions of fentanyl and lidocaine. Mechanical ventilation of the dog’s lungs was performed prior to placement of an Arndt EBB caudal to the right cranial bronchus to allow SLV. Successful SLV was achieved with this technique, allowing continued inflation of the right cranial lobe. A reduction in the arterial partial pressure of oxygen to fractional inspired oxygen ratio (PaO2 : FiO2) of 444 to 306 occurred after placement of the EBB, with no change in monitored cardiopulmonary variables. F-shunt increased from 17.4% to 23.7% with a reduction in oxygen content (CaO2) of 20.0 to 18.7 mg dL-1, remaining within the physiologic range. Due to lung adhesions to the diaphragm, conversion to thoracotomy was required for completion of the procedure. This technique is challenging to perform in the dog. Arterial blood gas analysis should be performed to allow adequate monitoring of ventilation.

1154: CAN ELECTRIC IMPEDANCE TOMOGRAPHY GUIDE A MECHANICAL VENTILATION STRATEGY?

2018 ◽  
Vol 46 (1) ◽  
pp. 561-561
Author(s):  
Erich Barischoff ◽  
Terry Forrette ◽  
Tom Lamphere ◽  
Ruben Restrepo
Keyword(s):  
Mechanical Ventilation ◽  
Electric Impedance ◽  
Ventilation Strategy ◽  
Electric Impedance Tomography ◽  
Impedance Tomography

Lung volume changes by electric impedance tomography (EIT) during endotracheal suctioning

2004 ◽  
Vol 21 (Supplement 32) ◽  
pp. 73
Author(s):  
S. Lindgren ◽  
H. Odenstedt ◽  
C. Olegard ◽  
S. Lundin ◽  
O. Stenqvist
Keyword(s):  
Lung Volume ◽  
Electric Impedance ◽  
Volume Changes ◽  
Endotracheal Suctioning ◽  
Electric Impedance Tomography ◽  
Impedance Tomography

scholarly journals Malignant Hyperthermia during Thoracoscopic Pulmorrhaphy in a 70-Year-Old Man

2014 ◽  
Vol 2014 ◽  
pp. 1-3
Author(s):  
Michihiro Sakai ◽  
Noriko Murakami ◽  
Yuji Kitamura ◽  
Shin Sato ◽  
Hiroshi Iwama ◽  
...  
Keyword(s):  
Malignant Hyperthermia ◽  
Lung Ventilation ◽  
Blood Gas Analysis ◽  
Gas Analysis ◽  
Arterial Blood Gas ◽  
Arterial Blood ◽  
Arterial Blood Gas Analysis ◽  
History Of ◽  
End Tidal ◽  
High Degree

Malignant hyperthermia (MH) is a rare but potentially fatal complication that may develop under general anesthesia (GA) and is rarely reported in elderly patients. We encountered a case of mild-onset MH in a 70-year-old patient who was receiving an elective thoracoscopic pulmorrhaphy and had a history of several GA procedures. Anesthesia was induced with propofol, fentanyl, and rocuronium and maintained with sevoflurane and remifentanil. His body temperature (BT) was 37.9°C after induction. During the procedure, the end-tidal CO2(ETCO2) increased steadily to 47–50 mmHg, presumably in response to the single lung ventilation. At the end, BT was 38.1°C and ETCO2was 47 mmHg under spontaneous breathing. After extubation, the patient wheezed on inspiration and expiration, and his trachea was reintubated. Sixty minutes after surgery, BT increased to 40.5°C and the arterial blood gas analysis showed severe metabolic acidosis. Based on these findings, MH was suspected and a bolus dose of dantrolene was administered. He responded to the dantrolene, and no complications or recurrence of MH was observed postoperatively. In this patient, the initial signs of MH were so subtle that making the diagnosis of MH was difficult. A high degree of suspicion is necessary to prevent a fulminant MH crisis.

Skin-to-skin care alters regional ventilation in stable neonates

2020 ◽  
Vol 106 (1) ◽  
pp. 76-80 ◽  
Author(s):  
Nicholas F Schinckel ◽  
Leah Hickey ◽  
Elizabeth J Perkins ◽  
Prue M Pereira-Fantini ◽  
Sienna Koeppenkastrop ◽  
...  
Keyword(s):  
Oxygen Saturation ◽  
Prone Position ◽  
Left Lung ◽  
Saturation Temperature ◽  
Lung Ventilation ◽  
Skin Care ◽  
Regional Ventilation ◽  
Axillary Temperature ◽  
Impedance Tomography ◽  
Skin To Skin

ObjectiveSkin-to-skin care (SSC) has proven psychological benefits; however, the physiological effects are less clearly defined. Regional ventilation patterns during SSC have not previously been reported. This study aimed to compare regional ventilation indices and other cardiorespiratory parameters during prone SSC with supine and prone position cot-nursing.DesignProspective observational study.SettingSingle quaternary neonatal intensive care unit in Australia.Patients20 infants spontaneously breathing (n=17) or on non-invasive ventilation (n=3), with mean (SD) gestational age at birth of 33 (5) weeks.InterventionsThirty-minute episodes of care in each position: supine cot care, prone SSC and prone cot care preceding a 10 min period of continuous electrical impedance tomography measurements of regional ventilation.Main outcome measuresIn each position, ventral–dorsal and right–left centre of ventilation (CoV), percentage of whole lung ventilation by region and percentage of apparent unventilated lung regions were determined. Heart and respiratory rates, oxygen saturation and axillary temperature were also measured.ResultsHeart and respiratory rates, oxygen saturation, temperature and right-left lung ventilation did not differ between the three positions (mixed-effects model). Ventilation generally favoured the dorsal lung, but the mean (95% CI) ventrodorsal CoV was −2.0 (−0.4 to –3.6)% more dorsal during SSC compared with prone. Supine position resulted in 5.0 (1.5 to 5.3)% and 4.5 (3.9 to 5.1)% less apparently unventilated lung regions compared with SSC and prone, respectively.ConclusionsIn clinically stable infants, SSC generates a distinct regional ventilation pattern that is independent of prone position and results in greater distribution of ventilation towards the dorsal lung.

scholarly journals A rare anaesthetic challenge in a one-lung ventilated paediatric patient with right upper lobe tracheal bronchus

2020 ◽  
Vol 48 (10) ◽  
pp. 030006052096760
Author(s):  
Yuangui Zhang ◽  
Meiman Qin ◽  
Xiaoqian Wang ◽  
Quanzhang Yan
Keyword(s):  
Paediatric Patient ◽  
Left Lung ◽  
Recurrent Infection ◽  
Lung Ventilation ◽  
Tracheal Bronchus ◽  
One Lung Ventilation ◽  
Recurrent Pneumonia ◽  
Single Lumen ◽  
History Of ◽  
The Right

A tracheal bronchus is a rare congenital anomaly, suggesting abnormal bronchial development. The prevalence of tracheal bronchus in children who undergo bronchoscopy is estimated to be between 0.2% and 3%. When associated with recurrent infection, lobes of the lung must be removed to avoid further lung injury. In such cases, perioperative one-lung ventilation and airway management remain a huge challenge for anaesthesiologists. The case of this rare airway anatomic abnormality in a paediatric patient with two bronchial openings into the right upper lobe, and with a history of recurrent pneumonia, is reported. In addition to a normal opening, a distinct opening in the upper lobe of the right lung was observed, that originated directly from the trachea, superior to the carina. The entire right lung was deflated by left-lung ventilation using a single lumen tracheal tube, and the patient underwent right upper lobe resection. No anaesthesia complications were observed during recovery. In this case, timely identification of the tracheal bronchus and successful collapse of the right lung were key points in the anaesthesia management of this patient.

Electric impedance tomography for monitoring volume and size of the urinary bladder

2011 ◽  
Vol 56 (6) ◽  
pp. 301-307 ◽  
Author(s):  
Steffen Leonhardt ◽  
Axel Cordes ◽  
Harry Plewa ◽  
Robert Pikkemaat ◽  
Irina Soljanik ◽  
...  
Keyword(s):  
Urinary Bladder ◽  
Electric Impedance ◽  
Electric Impedance Tomography ◽  
Impedance Tomography
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