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Matsumoto Y, Masuda T, Takahashi T, Hashimoto K, Yamaguchi K, Sakamoto S, Horimasu Y, Nakashima T, Miyamoto S, Iwamoto H, Ohshimo S, Fujitaka K, Yamasaki M, Hamada H, Hattori N. Pulmonary Alveolar Proteinosis with Severe Respiratory Failure Improved by Segmental Lung Lavage with Fiberoptic Bronchoscopy under General Anesthesia. Intern Med 2022; 61:389-393. [PMID: 34373375 PMCID: PMC8866800 DOI: 10.2169/internalmedicine.7432-21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Pulmonary alveolar proteinosis (PAP) is a rare disorder in which lipoproteinaceous materials accumulate in the alveolar compartments. A 72-year-old man was diagnosed with autoimmune PAP with severe respiratory failure. We decided to perform segmental lung lavage (SLL) with fiberoptic bronchoscopy under general anesthesia. If improvement was not significant, whole-lung lavage (WLL) would be done. SLL improved the respiratory failure and computed tomography findings. This case showed improvement in not only the area where lavage was done but also the non-lavaged area. SLL with fiberoptic bronchoscopy under general anesthesia might be an appropriate treatment option for patients with severe PAP.
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Affiliation(s)
- Yu Matsumoto
- Department of Molecular and Internal Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Japan
| | - Takeshi Masuda
- Department of Respiratory Medicine, Hiroshima University Hospital, Japan
| | - Tatsuki Takahashi
- Department of Respiratory Medicine, Hiroshima University Hospital, Japan
- Department of Internal Medicine, Mihara Medical Association Hospital, Japan
| | - Kaori Hashimoto
- Department of Internal Medicine, Hinode Clinic, Japan
- Department of Respiratory Disease, Hiroshima Red Cross Hospital & Atomic Bomb Survivors Hospital, Japan
| | - Kakuhiro Yamaguchi
- Department of Respiratory Medicine, Hiroshima University Hospital, Japan
| | - Shinjiro Sakamoto
- Department of Respiratory Medicine, Hiroshima University Hospital, Japan
| | - Yasushi Horimasu
- Department of Respiratory Medicine, Hiroshima University Hospital, Japan
| | - Taku Nakashima
- Department of Respiratory Medicine, Hiroshima University Hospital, Japan
| | - Shintaro Miyamoto
- Department of Respiratory Medicine, Hiroshima University Hospital, Japan
| | - Hiroshi Iwamoto
- Department of Molecular and Internal Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Japan
| | - Shinichiro Ohshimo
- Department of Emergency and Critical Care Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Japan
| | - Kazunori Fujitaka
- Department of Molecular and Internal Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Japan
| | - Masahiro Yamasaki
- Department of Respiratory Disease, Hiroshima Red Cross Hospital & Atomic Bomb Survivors Hospital, Japan
| | - Hironobu Hamada
- Department of Physical Analysis and Therapeutic Sciences, Graduate School of Biomedical and Health Sciences, Hiroshima University, Japan
| | - Noboru Hattori
- Department of Molecular and Internal Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Japan
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2
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Jung JW, Lee H, Oh J. Anesthetic management during whole-lung lavage using lung ultrasound in a patient with pulmonary alveolar proteinosis. Yeungnam Univ J Med 2021; 38:374-380. [PMID: 34482678 PMCID: PMC8688793 DOI: 10.12701/yujm.2021.01284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 08/21/2021] [Indexed: 11/05/2022] Open
Abstract
Pulmonary alveolar proteinosis (PAP) is an uncommon disease characterized by progressive accumulation of lipoprotein material in the lungs due to impaired surfactant clearance. Whole-lung lavage (WLL) is the current standard treatment and consists of sequential lavage of each lung to mechanically remove the residual material from the alveoli. Although WLL is considered safe, unexpected complications can occur. Moreover, due to the rarity of the disease itself, this procedure is unknown to many physicians, and management of intraoperative complications can be challenging for anesthesiologists. Lung ultrasound (LUS) provides reliable and valuable information for detecting perioperative pulmonary complications and, in particular, quantitation of lung water content. There have been reports on monitoring the different stages of controlled deaeration of the non-ventilated lung during WLL using LUS. However, it has been limited to non-ventilated lungs. Therefore, we report the use of LUS in WLL to proactively detect pulmonary edema in the ventilated lung and implement a safe and effective anesthesia strategy. Given the limited diagnostic tools available to anesthesiologists in the operating room, LUS is a reliable, fast, and noninvasive method for identifying perioperative pulmonary complications in patients with PAP undergoing WLL.
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Affiliation(s)
- Jae Wan Jung
- Division of Pulmonary Medicine, Department of Internal Medicine, Wonkwang University Hospital, Iksan, Korea
| | - Hyunho Lee
- Department of Anesthesiology and Pain Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
| | - Jimi Oh
- Department of Anesthesiology and Pain Medicine, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
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3
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Mata-Suarez SM, Castro-Lalín A, Mc Loughlin S, De Domini J, Bianco JC. Whole-Lung Lavage-a Narrative Review of Anesthetic Management. J Cardiothorac Vasc Anesth 2020; 36:587-593. [PMID: 33386193 DOI: 10.1053/j.jvca.2020.12.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 11/28/2020] [Accepted: 12/02/2020] [Indexed: 01/15/2023]
Abstract
Pulmonary alveolar proteinosis is a rare disease characterized by progressive accumulation of lipoprotein material in the alveoli as a result of a dysfunction in surfactant clearance. The whole-lung lavage procedure is considered the current standard of care and consists of the sequential lavage of both lungs for mechanical removal of residual material in the alveoli. However, a lack of standardization has resulted in different procedural techniques among institutions. Even though whole-lung lavage is considered to be a safe procedure, unforeseen complications might occur, and proper knowledge of physiologic implications may allow clinicians to establish the appropriate therapy. This review provides an insight into the underlying physiology of the disease, the technical details of the procedure from an anesthesiologist's perspective, and discussion of potential intraoperative complications.
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Affiliation(s)
- Santiago M Mata-Suarez
- Department of Anesthesiology, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina.
| | - Agustina Castro-Lalín
- Department of Anesthesiology, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Santiago Mc Loughlin
- Department of Anesthesiology, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Juan De Domini
- Department of Anesthesiology, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - Juan C Bianco
- Department of Anesthesiology, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
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4
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Pandit A, Gupta N, Madan K, Bharti SJ, Kumar V. Anaesthetic considerations for whole lung lavage for pulmonary alveolar proteinosis. Ghana Med J 2019; 53:248-251. [PMID: 31741497 PMCID: PMC6842735 DOI: 10.4314/gmj.v53i3.9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Pulmonary alveolar proteinosis (PAP) is an uncommon lung disease characterized by excessive accumulation of pulmonary surfactant that usually requires treatment with whole-lung lavage. A 47-year-old female presented with history of dry cough and breathlessness for past 6months. Chest radiograph demonstrated bilateral alveolar shadows and high resolution computerized tomography thorax showed crazy paving pattern. Broncho-alveolar lavage (BAL) and transbronchial lung biopsy confirmed a diagnosis of PAP. Due to worsening hypoxemia and respiratory failure, wholelung lavage was planned and performed. Anaesthetic management involved integrated use of pre-oxygenation, complete lung isolation, one-lung ventilation with optimal positive end-expiratory pressure, vigilant use of positional manoeuvres, and use of recruitment manoeuvres for the lavaged lung. We have discussed valuable strategies for the anaesthetic management of patients undergoing this multifaceted procedure in a case of severe PAP. FUNDING None declared.
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Affiliation(s)
- Anuja Pandit
- Department of Onco-Anesthesiology and Palliative Medicine, DRBRAIRCH, AIIMS, New Delhi, India
| | - Nishkarsh Gupta
- Department of Onco-Anesthesiology and Palliative Medicine, DRBRAIRCH, AIIMS, New Delhi, India
| | - Karan Madan
- Department of Pulmonary Medicine and Sleep Disorders, AIIMS, New Delhi, India
| | - Sachidanand J Bharti
- Department of Onco-Anesthesiology and Palliative Medicine, DRBRAIRCH, AIIMS, New Delhi, India
| | - Vinod Kumar
- Department of Onco-Anesthesiology and Palliative Medicine, DRBRAIRCH, AIIMS, New Delhi, India
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5
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Lee P, Mehta AC, Mathur PN. Management of complications from diagnostic and interventional bronchoscopy. Respirology 2009; 14:940-53. [PMID: 19740256 DOI: 10.1111/j.1440-1843.2009.01617.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
From the humble beginnings as a mere curiosity, the art of bronchoscopy has progressed at a rapid pace. The millennium ushers in new technologies and refinements in established techniques to facilitate early detection of cancer, precise targeting of pulmonary nodules and infiltrates, near-total staging of the mediastinum with combined endoscopic modalities and more effective palliation of inoperable tumours. Bronchoscopists are faced with an increasing myriad of tools and equipment, each promising to carry out better than the previous. It is opportune to review the complications of established bronchoscopic techniques and how to manage them as well as new complications associated with novel technologies. In this article, we provide a concise overview of diagnostic and therapeutic bronchoscopic modalities, discussion of associated complications and their management strategies.
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Affiliation(s)
- Pyng Lee
- Department of Respiratory and Critical Care Medicine, Singapore General Hospital, Singapore.
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6
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Pedreira WL, de Souza R, Fiks IN, Salge JM, de Carvalho CRR. Functional implications of BAL in the presence of restrictive or obstructive lung disease. Respir Med 2006; 101:1344-9. [PMID: 17118639 DOI: 10.1016/j.rmed.2006.10.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2006] [Revised: 09/17/2006] [Accepted: 10/02/2006] [Indexed: 10/23/2022]
Abstract
Most of the complications associated to bronchoscopy are related to changes of the respiratory function during or after its performance. Prevention of complications should be achieved by understanding the effects of bronchoscopic procedures and their relation to the pulmonary function deterioration. Previous studies regarding the functional impairment caused by bronchoalveolar lavage (BAL) were mostly limited by the presence of interferent factors such as sedative drugs. Furthermore, it is not clear whether or not patients with different ventilatory disturbances present the same functional response to bronchoscopy and BAL. The aim of this study was to determine the additional effects of BAL over the respiratory function deterioration related to bronchoscopy in patients with different respiratory function profiles (normal, restrictive and obstructive). Forty patients submitted to bronchoscopy without premedication were divided into four groups: group I-normal pulmonary function submitted to basic bronchoscopy; group II-bronchoscopy in combination with BAL, subdivided according to pulmonary function: group IIa (normal function), group IIb (restrictive ventilatory disturbances) and group IIc (obstructive ventilatory disturbances). Spirometry was made before and after the bronchoscopic procedure. Baseline hemoglobin saturation was compared to the lowest level during the procedure. Functional worsening caused by the procedure was observed with a decrease in forced vital capacity (FVC), forced expiratory volume in the first second (FEV(1)) and Hemoglobin saturation in all groups. Comparison between groups showed no significant difference regarding the changes in FVC (P=0.8324), FEV(1) (P=0.6952) and hemoglobin saturation (P=0.5044). We conclude that standardized BAL, like the one used in our study, does not result in an increased risk for ventilatory impairment compared to bronchoscopy itself, independently of the presence of previous respiratory disease.
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Affiliation(s)
- Wilson Leite Pedreira
- Pulmonary Division, University of São Paulo Medical School, Rua Bagé 163 apto 182, São Paulo 04012-140, Brazil.
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7
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Abstract
Pulmonary alveolar proteinosis is a rare syndrome characterized by intra-alveolar accumulation of surfactant components and cellular debris, with minimal interstitial inflammation or fibrosis. The condition has a variable clinical course, from spontaneous resolution to respiratory failure and death due to disease progression or superimposed infections. The standard of care for alveolor proteinosis therapy is represented by whole lung lavage. Important discoveries have been made in the last decade with respect to disease pathogenesis and therapy of both congenital and acquired forms of the disease. Granulocyte-macrophage colony-stimulating factor (GM-CSF) pathway has been shown to be involved in the disease pathogenesis of both acquired and congenital disease. Furthermore, anti-GM-CSF blocking autoantibodies have been found in the serum and bronchoalveolar lavage fluid and seem to interfere with the surfactant clearance by alveolar macrophages in many acquired cases. In the congenital form, the most common defects identified to date are several mutations of the genes encoding GM-CSF receptor subunits or surfactant proteins. Using GM-CSF as a therapeutic tool has also been shown to be effective in at least half of the acquired cases treated, while the importance of quantitative determination of anti-GM-CSF antibodies before and during the course of the therapy, as well as the autoantibody titer-GM-CSF dose relationship are to be elucidated. The congenital form of the disease does not respond to therapy with GM-CSF, consistent with the known primary defects and differences in disease pathogenesis.
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Affiliation(s)
- O C Ioachimescu
- Department of Pulmonary, Allergy and Critical Care Medicine, Cleveland Clinic Foundation, A90, Cleveland, OH 44195, USA.
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8
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Perez A, Rogers RM. Enhanced Alveolar Clearance With Chest Percussion Therapy and Positional Changes During Whole-Lung Lavage for Alveolar Proteinosis. Chest 2004; 125:2351-6. [PMID: 15189962 DOI: 10.1378/chest.125.6.2351] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Pulmonary alveolar proteinosis has traditionally been treated with whole-lung lavage (WLL). The literature describes a variety of techniques used in performing the WLL, including mechanical vs manual chest percussion, use of prone positioning, and variances in lavage volume. We have quantified and compared the effective alveolar clearance for each component of the lavage by measuring the dry weight of material in the lavage effluent. We measured this in five patients who underwent six consecutive WLLs at the University of Pittsburgh Medical Center. We performed the lavage in the following three stages: stage I, passive drainage; stage II, assisted clearance; and stage III, positional clearance. Aliquots of lavage effluent were centrifuged to determine the dry weight of material present in sequentially recorded bottles within each stage. At the initiation of each augmentation, there was a statistically significant improvement in the clearance of material (stage II, p = 0.009; stage III, p = 0.012). Furthermore, we show that lipoproteinaceous material is present in the lavage effluent in all stages of latter portions of the lavage. The effective removal of material would be expected to have an impact on the physiologic and clinical response to WLL. This finding emphasizes the importance of performing an adequate and standardized lavage.
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Affiliation(s)
- Andrew Perez
- Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
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9
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Abstract
Pulmonary alveolar proteinosis (PAP) is characterized by the accumulation of surfactant phospholipids and proteins within the lung alveoli. Important advances have been made over the past 8 years in our understanding of this disease, offering new directions for research and patient care. First, genetically altered mice that are homozygous for a disrupted granulocyte-macrophage colony-stimulating factor (GM-CSF) gene developed a lung lesion with histologic resemblance to PAP. The surfactant is thought to be catabolized or cleared mostly by alveolar macrophages, this process being dependent on GM-CSF. Second, a neutralizing autoantibody against GM-CSF was found in serum and bronchoalveolar lavage fluid of patients with idiopathic PAP but not in healthy controls, thereby raising the suspicion that human PAP may be an autoimmune disease. The relationship between the antibody and disease pathogenesis remains unclear but data suggest that the GM-CSF antibody may have a potential role as a diagnostic test. No specific therapy exists for PAP. Sequential whole lung lavage is the standard of care. Exogenous therapy with GM-CSF may improve the lung disease in some patients with PAP but this therapy is still experimental. Interventions directed at treating a relative GM-CSF deficiency by administration of GM-CSF or lowering the antibody level (i.e. by plasmapheresis or immunosuppression) may hold promise as future therapy for this rare disease.
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Affiliation(s)
- Saiprakash B Venkateshiah
- Department of Pulmonary and Critical Care Medicine, Cleveland Clinic Foundation, Cleveland, Ohio, USA
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10
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Cheng SL, Chang HT, Lau HP, Lee LN, Yang PC. Pulmonary alveolar proteinosis: treatment by bronchofiberscopic lobar lavage. Chest 2002; 122:1480-5. [PMID: 12377884 DOI: 10.1378/chest.122.4.1480] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
The current mainstay of treatment for pulmonary alveolar proteinosis (PAP) is whole-lung lavage. Therapy with granulocyte-macrophage colony-stimulating factor is a possibility, although its long-term safety has not been determined. An alternative procedure is selected lobar lavage by fiberoptic bronchoscopy (FOB). We report here our experiences with lobar lavage by FOB in treating three patients with PAP. PAP was diagnosed in three patients (two men, one woman) who had dyspnea and hypoxemia after undergoing open-lung biopsy. The patients underwent lobar lavage by FOB under local anesthesia. The bronchoscope was wedged into a lobar bronchus. Approximately 2,000 mL warm normal saline solution was instilled via syringe in 50-mL aliquots through a fiberoptic bronchoscope. After undergoing multiple lobar lavages, two patients showed clinical, physiologic, and radiologic improvement. The third patient, who had more advanced disease, showed improvement only in oxygenation. The major complications were severe cough and hypoxemia during lavage. Our experience suggests that bronchoscopic lobar lavage is simple and safe, and may find application in patients in whom a whole-lung lavage with generalized anesthesia may be hazardous, and in patients with less advanced disease whose proteinaceous substances can be removed with a small volume of lavage fluid.
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Affiliation(s)
- Shih-Lung Cheng
- Department of Internal Medicine, Far Eastern Memorial Hospital, Taipei, Taiwan
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11
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Seymour JF, Presneill JJ. Pulmonary alveolar proteinosis: progress in the first 44 years. Am J Respir Crit Care Med 2002; 166:215-35. [PMID: 12119235 DOI: 10.1164/rccm.2109105] [Citation(s) in RCA: 411] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Pulmonary alveolar proteinosis is a rare clinical syndrome that was first described in 1958. Subsequently, over 240 case reports and small series have described at least 410 cases in the literature. Characterized by the alveolar accumulation of surfactant components with minimal interstitial inflammation or fibrosis, pulmonary alveolar proteinosis has a variable clinical course ranging from spontaneous resolution to death with pneumonia or respiratory failure. The most effective proven treatment--whole lung lavage--was described soon after the first recognition of this disease. In the last 8 years, there has been rapid progress toward elucidation of the molecular mechanisms underlying both the congenital and acquired forms of pulmonary alveolar proteinosis, following serendipitous discoveries in gene-targeted mice lacking granulocyte-macrophage colony-stimulating factor (GM-CSF). Impairment of surfactant clearance by alveolar macrophages as a result of inhibition of the action of GM-CSF by blocking autoantibodies may underlie many acquired cases, whereas congenital disease is most commonly attributable to mutations in surfactant protein genes but may also be caused by GM-CSF receptor defects. Therapy with GM-CSF has shown promise in approximately half of those acquired cases treated, but it is unsuccessful in congenital forms of the disease, consistent with the known differences in disease pathogenesis.
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Affiliation(s)
- John F Seymour
- Ludwig Institute for Cancer Research, Melbourne Tumour Biology Branch, and the Intensive Care Unit, The Royal Melbourne Hospital, Parkville, Australia.
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12
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Shah PL, Hansell D, Lawson PR, Reid KB, Morgan C. Pulmonary alveolar proteinosis: clinical aspects and current concepts on pathogenesis. Thorax 2000; 55:67-77. [PMID: 10607805 PMCID: PMC1745595 DOI: 10.1136/thorax.55.1.67] [Citation(s) in RCA: 176] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- P L Shah
- Royal Brompton Hospital and Imperial College School of Medicine at the National Heart & Lung Institute, London SW3 6NP, UK
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13
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Moutafis M, Dalibon N, Colchen A, Fischler M. Improving oxygenation during bronchopulmonary lavage using nitric oxide inhalation and almitrine infusion. Anesth Analg 1999; 89:302-4. [PMID: 10439735 DOI: 10.1097/00000539-199908000-00008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- M Moutafis
- Department of Anesthesiology, Hôpital Foch, Suresnes, France
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14
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Moutafis M, Dalibon N, Colchen A, Fischler M. Improving Oxygenation During Bronchopulmonary Lavage Using Nitric Oxide Inhalation and Almitrine Infusion. Anesth Analg 1999. [DOI: 10.1213/00000539-199908000-00008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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15
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Loubser PG. Validity of pulmonary artery catheter-derived hemodynamic information during bronchopulmonary lavage. J Cardiothorac Vasc Anesth 1997; 11:885-8. [PMID: 9412892 DOI: 10.1016/s1053-0770(97)90128-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- P G Loubser
- Department of Anesthesiology, Baylor College of Medicine, Houston, TX, USA
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16
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Hurrion EM, Pearson GA, Firmin RK. Childhood pulmonary alveolar proteinosis. Extracorporeal membrane oxygenation with total cardiopulmonary support during bronchopulmonary lavage. Chest 1994; 106:638-40. [PMID: 7774361 DOI: 10.1378/chest.106.2.638] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Partial cardiopulmonary bypass with extracorporeal membrane oxygenation to allow bilateral bronchopulmonary lavage in pulmonary alveolar proteinosis has been described. However, this technique is complicated by a very low arterial PO2 and cardiovascular embarrassment. Total cardiopulmonary support avoids these problems and was successfully used in a 2 1/2-year-old girl.
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Affiliation(s)
- E M Hurrion
- Department of Pediatric Cardiothoracic Surgery, Groby Road Hospital, Leicester, United Kingdom
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17
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Aguinaga MA, Santos P, Renes E, Alvaro PF, Lorente JA, Maudes A, Diaz RR, Landín L, Liste D. Hemodynamic changes during whole bronchoalveolar lavage in two cases of pulmonary alveolar proteinosis. Intensive Care Med 1991; 17:421-3. [PMID: 1774397 DOI: 10.1007/bf01720681] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Five whole bronchoalveolar lavages were performed in 2 patients with pulmonary alveolar proteinosis with continuous monitoring of mixed venous and arterial oxygen saturation. Hemodynamic parameters and gas-exchange status were measured during the different phases of the lavage. In the phase of filled lung, a significant increase of arterial partial pressure (PaO2) and arterial saturation of oxygen were observed, secondary to a decrease in the intrapulmonary shunt. The mean pulmonary arterial pressure, pulmonary vascular resistances and cardiac index were higher during the filling of the lung as compared to the controls. During the empty lung phase, although PaO2 decreased (without reaching statistical significance), due to an increase in the intrapulmonary shunt, the increase in cardiac output during this phase left the oxygen delivery (DO2) unchanged.
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Affiliation(s)
- M A Aguinaga
- Service of Intensive Care Medicine, Ramon y Cajal Hospital, Madrid, Spain
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18
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Cohen E, Eisenkraft JB. Bronchopulmonary lavage: effects on oxygenation and hemodynamics. JOURNAL OF CARDIOTHORACIC ANESTHESIA 1990; 4:609-15. [PMID: 2132140 DOI: 10.1016/0888-6296(90)90411-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- E Cohen
- Department of Anesthesiology, Mount Sinai School of Medicine, New York, NY 10029-6574
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19
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Abstract
Twenty seven healthy individuals were divided randomly into three groups. The first group of nine subjects received only a routine bronchoscopic examination. The second group of nine subjects was examined with the bronchoscope followed by bronchoalveolar lavage (BAL) with 200 ml of 25 degrees C normal saline solution. The third group of nine subjects received a bronchoscopic examination followed by BAL, but with 200 ml of 37 degrees C normal saline solution. Examination in all groups included arterial blood gas (ABG) analysis and pulmonary function test (PFT), both pre- and post-procedure. In group 1 there was no statistical difference in the pulmonary function test result after routine bronchoscopic examination except for decrease in PaO2. The results in group 2 showed a statistical difference in both ABG and PFT data, especially PaO2, FEF 200-1200, FEF25%-75%, FEF25%, FEF50%, and FEF75%. In group 3, there was a significant decrease of PaO2 and no significant difference in PFT before and after BAL. From these data we conclude that BAL is a safe examination. However, the administration BAL fluid (BALF) with 25 degrees C normal saline solution can affect the results of the PFT significantly. Much of this adverse reaction can be minimized by using body temperature (37 degrees C) saline solution. At 37 degrees C, the ABG data showed a decrease in PaO2, but pulmonary function was not affected significantly.
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Affiliation(s)
- C C Lin
- Department of Internal Medicine, Mackay Memorial Hospital, Taipei, Taiwan
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20
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Jansen HM, Zuurmond WW, Roos CM, Schreuder JJ, Bakker DJ. Whole-lung lavage under hyperbaric oxygen conditions for alveolar proteinosis with respiratory failure. Chest 1987; 91:829-32. [PMID: 3581931 DOI: 10.1378/chest.91.6.829] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Whole-lung lavage under hyperbaric oxygen conditions was performed in two patients suffering from severe respiratory insufficiency in pulmonary alveolar proteinosis. Under these conditions, gas exchange was maintained and the mixed venous partial pressure of oxygen and oxygen saturation showed increases to acceptable levels. This enabled us to limit the FIO2 in order to extend the oxygen tolerance and to perform lavage procedures more effectively. Both patients showed a very significant improvement of their clinical course, and we conclude that elective use of hyperbaric oxygen in unilateral lung lavages should be considered in these severe cases.
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21
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Prakash UB, Barham SS, Carpenter HA, Dines DE, Marsh HM. Pulmonary alveolar phospholipoproteinosis: experience with 34 cases and a review. Mayo Clin Proc 1987; 62:499-518. [PMID: 3553760 DOI: 10.1016/s0025-6196(12)65477-9] [Citation(s) in RCA: 168] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A retrospective review of Mayo Clinic records through 1983 revealed 84 patients (24 male and 10 female; mean age, 41 years) with the diagnosis of pulmonary alveolar phospholipoproteinosis. The major clinical features were dyspnea, cough, fever, and chest pain. Chest roentgenograms usually showed bilateral symmetric alveolar infiltrates, but asymmetric, unilateral, and chronic patchy patterns were also noted. Diagnosis was established by thoracotomy-lung biopsy in 26 patients. Histologic analysis revealed uniform filling of the alveoli by periodic acid-Schiff-positive material and maintenance of normal alveolar architecture. Electron microscopy showed enlarged alveolar macrophages with lamellar osmiophilic inclusions, dense granules, and myeloid bodies. Of the 21 patients who underwent therapeutic bronchoalveolar lavage, 13 had no recurrence of the disease during a mean follow-up of 8.8 years. In patients who underwent pulmonary function testing both before and after lavage, significant restrictive dysfunctions present before the procedure were alleviated afterward. Three deaths occurred among the 34 patients. Pulmonary alveolar phospholipoproteinosis may result from defective clearance of phospholipids by the alveolar macrophages, excessive production of phospholipids by type II pneumocytes, or both. It is likely a nonspecific response to a variety of injuries to the alveolar macrophage or type II pneumocyte or both, including exposure to certain dusts and chemicals and occurrence of hematologic diseases or infections. The uncommon occurrence of this disorder suggests individual susceptibility.
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Lay JC, Slauson DO, Castleman WL. Volume-controlled bronchopulmonary lavage of normal and pneumonic calves. Vet Pathol 1986; 23:673-80. [PMID: 3811133 DOI: 10.1177/030098588602300605] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Saline bronchopulmonary lavage of the right lung of 16 anesthetized calves was performed using a single-lumen cuffed endotracheal tube. The initial volume of saline introduced was based on the functional residual capacity (FRC) of the right lung lobes as determined from the proportional weights of the right (58% of total FRC) and left (42% of total FRC) lung lobes. Calves were divided into "pneumonic" and "normal" groups based on clinical signs. Five sequential washes were done on each calf. There was no difference in the percentage of total lavage fluid volume recoverable between normal (83.8 +/- 4.2%) and pneumonic (81.1 +/- 8.2%) calves. Cell yield in the initial wash was consistently greater than in subsequent washes for both normal (12.7 +/- 6.6 X 10(6) cells/kg body weight) and pneumonic (58.1 +/- 37.6 X 10(6) cells/kg body weight) calves, and constituted 62.0% (normal) and 75.4% (pneumonic) of the total recoverable cell yield. Total cell yields were higher (P less than 0.05) in pneumonic calves, primarily due to neutrophil leukocytes (PMN). Neutrophils constituted 53.7 +/- 25% of the total cell yield in the pneumonic calves, but only 12.3 +/- 9.5% in the normal calves. The pulmonary alveolar macrophage (PAM) was the major recoverable cell in normal calves (85.7 +/- 8.7% of total lavage cells). Macrophages constituted a smaller (42.9 +/- 23.5) percentage of the total lavage cells in the pneumonic group due to increased PMN numbers. Viability of recovered cells from the pneumonic calves (91.5 +/- 4.8%) was lower than for the normal calves (94.1 +/- 2.5%), but the difference was not significant.(ABSTRACT TRUNCATED AT 250 WORDS)
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Julien T, Caudine M, Barlet H, Wintrebert P, Aubas P, du Cailar J. [Effect of positive end expiratory pressure on arterial oxygenation during bronchoalveolar lavage for proteinosis]. ANNALES FRANCAISES D'ANESTHESIE ET DE REANIMATION 1986; 5:173-6. [PMID: 3524322 DOI: 10.1016/s0750-7658(86)80104-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
To maintain good cellular oxygenation during bronchopulmonary lavage for alveolar proteinosis is often a difficult problem to solve. A case is reported of alveolar proteinosis in whom four lavages were performed. Details of the technique are discussed, as are the problems with expedients used to improve PaO2. The use of a 10 cmH2O positive end-expiratory pressure was useful only during the "in-phase"; in the "out-phase", it worsened the PaO2. PaO2 during lavage in patients with alveolar proteinosis can only be improved by three ways: cancellation of the shunt during lung filling and, during the "out-phase", an increase in FIO2 or pulmonary artery occlusion by a balloon.
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Moazam F, Schmidt JH, Chesrown SE, Graves SA, Sauder RA, Drummond J, Heard SO, Talbert JL. Total lung lavage for pulmonary alveolar proteinosis in an infant without the use of cardiopulmonary bypass. J Pediatr Surg 1985; 20:398-401. [PMID: 4045665 DOI: 10.1016/s0022-3468(85)80227-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Pulmonary alveolar proteinosis is a rare disease that usually affects the adult patient, but is now being recognized as a possible cause of neonatal respiratory distress. In the adult patient, whole lung lavage, as described by Ramirez-R in 1965, is considered the most effective therapy for management of this condition. The lavage can be accomplished safely and with relative ease by using a Carlens or Robertshaw tube to isolate and lavage one lung while ventilating the other. The unavailability of a small double-lumen tube makes this procedure impossible in the pediatric age group. Therefore, whole lung lavage has been possible in only a few children in the past with the help of cardiopulmonary bypass to allow simultaneous oxygenation during the pulmonary lavage. Due to the hazards and technical difficulties of cardiopulmonary bypass, total pulmonary lavage can not be considered a practical option in the very small infant. A 15-week-old infant is reported, weighing 2 kg with a diagnosis of pulmonary alveolar proteinosis, who underwent total pulmonary lavage safely on three different occasions without employing cardiopulmonary bypass. A double-lumen Swan-Ganz catheter, introduced transbronchoscopically through the side-arm of a rigid, 3.5-mm Storz bronchoscope was used to isolate and lavage one lung while ventilation to the other lung was maintained through the bronchoscope. A Nellcor oximeter, utilized for transcutaneous monitoring, revealed satisfactory oxygen saturation during the entire pulmonary lavage. The transbronchoscopic lavage was monitored under direct vision with a video monitor, ensuring correct position of the bronchoscope and the catheter at all times.(ABSTRACT TRUNCATED AT 250 WORDS)
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Matuschak GM, Owens GR, Rogers RM, Tibbals SC. Progressive intrapartum respiratory insufficiency due to pulmonary alveolar proteinosis. Amelioration by therapeutic whole-lung bronchopulmonary lavage. Chest 1984; 86:496-9. [PMID: 6468015 DOI: 10.1378/chest.86.3.496] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
A 23-year-old woman became pregnant in the setting of long-standing severe pulmonary alveolar proteinosis. A previous twin gestation had resulted in low birth-weight infants. Progressive clinical and respiratory deterioration occurred, associated with exertional arterial oxygen desaturation. Because of the severity of her physiologic derangements and concern for the fetus, whole-lung bronchopulmonary lavage was performed twice under controlled conditions. This resulted in subjective and objective improvement, followed by successful term delivery.
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Claypool WD, Rogers RM, Matuschak GM. Update on the clinical diagnosis, management, and pathogenesis of pulmonary alveolar proteinosis (phospholipidosis). Chest 1984; 85:550-8. [PMID: 6368143 DOI: 10.1378/chest.85.4.550] [Citation(s) in RCA: 95] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
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Heymach GJ, Shaw RC, McDonald JA, Vest JV. Fiberoptic bronchopulmonary lavage for alveolar proteinosis in a patient with only one lung. Chest 1982; 81:508-10. [PMID: 7067517 DOI: 10.1378/chest.81.4.508] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Bronchopulmonary lavage with a fiberoptic bronchoscope was performed on a patient with alveolar proteinosis and only one lung. Lavage was performed under general anesthesia with continuous monitoring of oxygen saturation. Sequential washing of subsegments of his right upper and middle lobes did not compromise gas exchange to the remaining lower lobe. The patient tolerated the procedure without difficulty and had rapid improvement in pulmonary function and exercise capability, persisting during two months of follow-up. The necessity for cardiopulmonary bypass to provide oxygenation was anticipated and new equipment was designed should it have been required.
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Harrison GA, Kelly AJ. Technical aspects of bronchopulmonary lavage for alveolar proteinosis: two case reports. Anaesth Intensive Care 1981; 9:277-85. [PMID: 6792945 DOI: 10.1177/0310057x8100900313] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Under general anaesthesia, therapeutic bronchopulmonary lavage was performed in two patients suffering from alveolar proteinosis. In one patient, difficulties were experienced during attempted lavage of the right lung. Fluid trapping occurred when saline was infused down the tracheal (right) lumen of a Carlen's double lumen endobronchial tube and also when a left Robertshaw tube was similarly used. Spillover of saline into the left lung occurred when a right Robertshaw was used. Efficient lavage of the right lung could only be performed after insertion of a White endobronchial tube. In the second patient, both lungs were washed without problem using a left Robertshaw tube after difficulty had been experienced with a Carlen's tube. In both cases venous admixture was least when the lavaged lung was filled with saline. Hypoxaemia increased as the lung was drained. Details of technique are discussed as are problems with double lumen endobronchial tubes used during the procedure.
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Freedman AP, Pelias A, Johnston RF, Goel IP, Hakki HI, Oslick T, Shinnick JP. Alveolar proteinosis lung lavage using partial cardiopulmonary bypass. Thorax 1981; 36:543-5. [PMID: 7314027 PMCID: PMC1020439 DOI: 10.1136/thx.36.7.543] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
An adult case of pulmonary alveolar proteinosis presented with an arterial oxygen tension of 27 mmHg (3.6 kPa) while breathing air. Dangerous hypoxaemia during lung lavage was avoided by using partial cardiopulmonary bypass.
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Francoz RA, Konopka R, Sgroi V, Moser KM. Changes in ventilation and perfusion in anesthetized dogs following lobar lavage with saline solution. Chest 1978; 74:552-8. [PMID: 738093 DOI: 10.1378/chest.74.5.552] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The therapeutic application of endobronchial lavage has been inhibited by concern regarding alterations in the exchange of gases, particularly hypoxemia, and by the technical complexity of the procedure. Using a cuffed fiberoptic bronchoscope with which lavage could be restricted to one lobe, we studied the sequence of alterations in the exchange of gases after lavage and the attendant disturbances in ventilation and perfusion in ten mongrel dogs following lobar lavage with 1,850 ml of physiologic saline solution. Sequential scintiphotographs of ventilation and perfusion and sequential measurements of arterial blood gas levels were obtained. Linkage of the computer to the scintillation camera allowed quantification of data on ventilation and perfusion from the lobar area of interest. Lavage induced a reduction in regional ventilation and perfusion in all dogs. The decline in ventilation preceded that in perfusion, and the computed ratio of ventilation over perfusion reached its lowest point during the first 30 minutes after lavage. The arterial oxygen pressure (PaO2) declined in all dogs from a mean baseline value of 87 mm Hg to a mean value of 76 mm Hg at 30 minutes after lavage and gradually returned to a mean of 85 mm Hg by six hours after lavage. The lowest value for PaO2 occurred after balloon occlusion prior to lavage. Calculations of shunt showed a minimal increment in the intrapulmonary shunt (Qs/Qt). In the normal dog, lobar lavage induces mild hypoxemia due to an imbalance of ventilation and perfusion that resolves within six hours.
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Selecky PA, Wasserman K, Benfield JR, Lippmann M. The clinical and physiological effect of whole-lung lavage in pulmonary alveolar proteinosis: a ten-year experience. Ann Thorac Surg 1977; 24:451-61. [PMID: 921378 DOI: 10.1016/s0003-4975(10)63440-6] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We have utilized whole-lung lavage in the successful treatment of 18 patients with pulmonary alveolar proteinosis. Our ten-year experience includes serial evaluations of patients with disabling lung dysfunction who had a total of 49 whole-lung lavages under general anesthesia. Clinical and physiological responses were documented both before and after each lavage. There were no complications or deaths. All patients were radiographically, physiologically, and symptomatically improved within hours after the procedures. Five patients required from two to four repeat lavages one to three years later. The treatment of this disorder has included a wide variety of techniques. We attribute our results to the use of a lung lavage technique that includes: (1) unilateral whole-lung lavages at two to three day intervals; (2) isotonic saline as the lavage solution; (3) use of a mechanical chest percussor during lavage; and (4) measuring the total thoracic compliance of each side in the immediate postlavage period as a guide for extubation. We conclude that whole-lung lavage is a safe, highly effective, repetitively applicable treatment for pulmonary alveolar proteinosis.
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Brach BB, Harrell JH, Moser KM. Alveolar proteinosis. Lobar lavage by fiberoptic bronchoscopic technique. Chest 1976; 69:224-7. [PMID: 1248279 DOI: 10.1378/chest.69.2.224] [Citation(s) in RCA: 37] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Lavage limited to an isolated lobe was performed on multiple occasions using a cuffed fiberoptic bronchoscope in a patient with alveolar proteinosis. Sequential ventilation-perfusion scintiphotoscans were used to preselect and follow the functional behavior of the lavaged lobe. Lavage led to functional improvement. The technique of fiber-optic bronchoscopic lobar lavage is simple and may find application in patients in whom lavage of an entire lung may be hazardous.
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Blümcke S, Achterrath U, Veith FJ. Alveolar lavage cytology as a method for diagnosis of early rejection of transplanted lungs. PNEUMONOLOGIE. PNEUMONOLOGY 1975; 152:131-9. [PMID: 1103095 DOI: 10.1007/bf02101581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Alveolar lavage cytology in transplanted lungs I. Staining methods and findings in dogs with autografts and allografts without immunosuppression. J Thorac Cardiovasc Surg 1975. [DOI: 10.1016/s0022-5223(19)41530-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Costello JF, Moriarty DC, Branthwaite MA, Turner-Warwick M, Corrin B. Diagnosis and management of alveolar proteinosis: the rôle of electron microscopy. Thorax 1975; 30:121-32. [PMID: 1179307 PMCID: PMC470256 DOI: 10.1136/thx.30.2.121] [Citation(s) in RCA: 72] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The diagnosis and management of three cases of pulmonary alveolar proteinosis are described. The electron microscopic appearances of lung biopsy material, lung washings, and sputum and the value of this method of sputum examination in extremely ill patients are demonstrated. The practical details of controlled volume bronchial lavage are described and the good clinical and physiological response of patients reported. The findings have been compared with those of experimental pulmonary alveolar proteinosis, and the pathogenesis of the condition is discussed.
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Blenkarn GD, Lanning CF, Kylstra JA. Anaesthetic management of volume controlled unilateral lung lavage. CANADIAN ANAESTHETISTS' SOCIETY JOURNAL 1975; 22:154-63. [PMID: 236075 DOI: 10.1007/bf03004971] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Dubrawsky C, Awe RJ, Jenkins DE. The effect of bronchofiberscopic examination on oxygenation status. Chest 1975; 67:137-40. [PMID: 1116388 DOI: 10.1378/chest.67.2.137] [Citation(s) in RCA: 61] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Arterial blood gases were measured in 62 patients, none of whom was critically ill, to determine the effect of transnasal fiberoptic bronchoscopy on oxygenation status. Blood samples were obtained at regular intervals during the procedure. Thirty-four patients who were bronchoscoped while breathing room air had a significant drop in the arterial P02 following saline solution lavage. Twenty-eight patients who were given 28 percent oxygen via a Ventimask during the procedure were protected from this hypoxemia. Simultaneously measured arterial pH and Pco2 were unchanged during the procedure. Premedication alone resulted in a minimal but insignificant drop in PaO2 in 7 patients. These observations suggest that if the initial PaO2 is less than 70 mm Hg on room air, bronchoscopy by the transnasal approach is best performed with the administration of oxygen through an appropriate mask. If the patient is at risk of developing hypercapnia with supplemental oxygen, a 28 percent Ventimask should be utilized to prevent significant hypoxemia without causing hypercapnia.
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