alexa Pediatric Mechanical Support with an External Cardiac Compression Device | OMICS International
ISSN: 2329-6925
Journal of Vascular Medicine & Surgery
Make the best use of Scientific Research and information from our 700+ peer reviewed, Open Access Journals that operates with the help of 50,000+ Editorial Board Members and esteemed reviewers and 1000+ Scientific associations in Medical, Clinical, Pharmaceutical, Engineering, Technology and Management Fields.
Meet Inspiring Speakers and Experts at our 3000+ Global Conferenceseries Events with over 600+ Conferences, 1200+ Symposiums and 1200+ Workshops on
Medical, Pharma, Engineering, Science, Technology and Business

Pediatric Mechanical Support with an External Cardiac Compression Device

Minoo N Kavarana1*, Howard M Loree II2, Robert B Stewart2, Michael T Milbocker3, Robert L Hannan4, George M Pantalos5 and Robert TV Kung2

1Department of Surgery, Medical University of South Carolina, Charleston, SC, 29425, USA

2ABIOMED, Danvers, MA, United States

3Promethean Surgical Devices, Inc., East Hartford, CT, United States

4Department of Surgery, Miami Children’s Hospital, Miami, FL, United States

5Department of Surgery, University of Louisville, Louisville, KY, United States

*Corresponding Author:
Joseph J Naoum, MD, FACS, RPVI
University Medical Center – Rizk Hospital
Zahar Street, Achrafieh Beirut, Lebanon
Tel: +96176933937
E-mail: [email protected]

Received Date: April 25, 2012; Accepted Date: May 16, 2013; Published Date: May 18, 2013

Citation: Bavare CS, Naoum JJ (2013) Pectoralis Minor Compression of the Axillary Vein–Anatomy of a Problem and its Solution. J Vasc Med Surg 1:105. doi:10.4172/2329-6925.1000105

Copyright: © 2013 Bavare CS, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Visit for more related articles at Journal of Vascular Medicine & Surgery

Abstract

The PediBooster external cardiac compression device is a minimally invasive, non-blood contacting Biventricular Assist Device (BiVAD) intended for pediatric use. It is being developed as a palliative therapy for acute Postcardiotomy Shock (PCS). The PediBooster extracardiac wrap is pneumatically actuated to circumferentially compress the heart, providing co-pulsation support. Attachment is via a novel hydrogel coating. Early versions of the wrap were tested in vivo using a single ventricle congenital heart disease model with postcardiotomy shock, which proved unstable and demonstrated high peri-operative mortality. The final wrap design was tested in 4 acute studies with piglets (5.1 ± 0.3 kg), where the combination of ASD and PA banding induced acute right ventricular dysfunction. Data collected included routine hemodynamic values, TEE, video of the exposed heart, and cardiac histology. The model proved stable for support durations ranging from 2 to 16 hours. The wrap restricted the heart in 3 of the 4 animals, as evidenced by increased diastolic LVP during support compared to the baseline failure condition. TEE and video data showed good attachment and function of the wrap, particularly during the final 16 hr study. This model of congenital heart disease shows promise for chronic (24-72 hr) studies. Ventricular filling during support may be improved by adjusting wrap dimensions to eliminate end diastolic restriction.

Introduction

Pectoralis minor syndrome, also called “hyper abduction syndrome”, is a rare but documented entity mimicking thoracic outlet syndrome (TOS) symptoms. Rarer still, is non-thrombotic axillary vein obstruction due to compression by the pectoralis minor muscle (PMM). Wright [1] in 1945 introduced the term pectoralis minor syndrome as a neurovascular syndrome produced by hyper abduction of the arms. His manuscript focused on the arterial system. Venography was not performed in the described patients, but was suggested that it would be of interest in cases with axillary vein involvement. Limited evidence exists about the condition, but it was not until 2007 that Sanders and colleagues [2] documented dynamic obstruction of the axillary vein on venography. Surgical division of the pectoralis minor insertion, also known as pectoralis minor tenotomy (PMT) was shown to be the treatment of choice. A high index of suspicion is needed to diagnose pectoralis minor syndrome and it should be alerted by the finding of axillary vein compression.

Case History

A 19-year-old man presented with intermittent left arm pain, bluish coloration and swelling. The pain was throbbing and radiating to the left side of the neck, shoulder and scapula. It was exacerbated by elevation of the left arm and increasing activity. On physical exam symptoms were duplicated with hyper-abduction of the shoulder to 180 degrees. Wasting of hand muscles was not seen and no significant change in the radial pulse was observed with provocative maneuvers. Plain x-rays of the chest and cervical spine were normal, as were previous magnetic resonance imaging of the neck and nerve conduction studies. Color flow duplex did not show thrombosis, but showed decreased respiratory phasicity in the brachial vein, with the arm abducted to 90 degrees. Venography showed external compression of the left axillary vein on abduction of the shoulder to 180 degrees, which was not seen on adduction. The patient underwent a division of the left PMM by an infra-clavicular approach and completion venography (Figure 1). At 1 and 3 month follow-up the patient had complete resolution of clinical symptoms and without a perioperative complication.

vascular-medicine-surgery-pectoralis

Figure 1: (A) Operative picture showing dissection of the pectoralis minor muscle (PMM), (B) Identification of the axillary neurovascular bundle, (C) Preoperative dynamic venography showing axillary vein compression by the PMM on abduction, (D) Resolution of the obstruction after PMT.

Discussion

Axillary vein compression by the PMM is a rare condition. Lord and Stone [3] first reported five patients undergoing pectoralis minor division along with scalenotomy to treat pectoralis minor syndrome. Three patients had typical symptoms of arm pain or tightness along with arm swelling. Although surgery relieved the pain, the swelling persisted. Venography was not documented. Hewitt [4] described the first instance of pectoralis minor division without scalenectomy for the treatment of acute axillary vein compression. Sachatello [5] demonstrated a causal agent to be an anatomical variant band of muscle, extending from the latissimus dorsi muscle to the insertion of the PMM. Daskalakis and Bouhoutsos [6] described five patients with non-thrombotic compression of the axillary vein due to a variety of factors such as PMM and mal-union of the clavicle. Evans et al. [7] used dynamic venography to illustrate vein compression with hyper abduction of the arm. The authors demonstrated an anomalous band of fascia from the biceps muscle, division of which relieved the compression of the axillary vein. In addition, Sanders and Rao [2] described a series of six patients with axillary vein thrombosis for whom PMT provided relief of symptoms. Completion dynamic venography was done in half of those patients and demonstrated resolution of the stenosis.

Pectoralis minor nerve block has been documented to be a useful adjunct for the diagnosis of pectoralis minor syndrome, with relief of symptoms expected to be seen following the local infiltration of lidocaine [2]. The nerve block can be used as an indirect confirmation that division of the muscle would provide symptom relief. Pectoralis minor muscle block is performed by injecting 1% lidocaine into the muscle. The point of injection is determined approximately 3 cm below the clavicle. A needle is inserted at a 45-degree angle upward to avoid the pleura, aiming toward the coracoid process. The medial pectoral nerve enters the deep surface of the pectoralis minor, where it divides into a number of branches. The muscle block affects these nerve branches and relaxes the pectoralis minor muscle fibers. When the muscle is in its relaxed position, it does not exert downward compression on its underlying structures; in this case the axillary vein. This was not carried out in our patient.

Color flow duplex showed decreased respiratory phasicity in the brachial vein with the arm abducted to 90 degrees. Though more invasive, we believe that patients with the symptoms of unilateral extremity pain and swelling in whom venous obstruction is suspected should undergo dynamic venography. In our patient, dynamic venography confirmed the external compression of the left axillary vein. Additionally, inpatients presenting with arm pain and swelling in which pectoralis minor syndrome is suspected, apectoralis minor block can be performed. If this leads to symptom improvement or resolution, it emphasizes the cause of axillary compression being the pectoralis minor muscle. A high index of suspicion for axillary vein compression would warrant a surgical decompression by a PMT. Table 1 summarizes the characteristic features for the diagnosis and treatment of this condition.

PECTORALIS MINOR SYNDROME (Axillary vein compression)
ANATOMIC ETIOLOGY Compression of the axillary vein by the pectorlis minor muscle
SYMPTOMS Arm swelling, pain, cyanosis, or tightness
PHYSICAL FINDINGS -Hyperabduction of the arm may reproduce symptoms without a change in distal arterial perfusion
-Arms swelling or cyanosis.
-Venous collaterals in the upper arm or shoulder
DIAGNOSTIC TESTING -Nerve conduction studies (evaluate nerve compression)
-Duplex ultrasound
-Dynamic venography
TREATMENT Pectoralis minor tenotomy

Table 1: Characteristicfeatures of Pectoralis Minor Syndrome with axillary vein compression.

Conclusion

Non-thrombotic axillary vein compression is an unusual entity causing upper extremity swelling and pain. Diagnosis can be made by a thorough history and physical exam ultimately followed by dynamic venography. Pectoralis minor tenotomy is a safe procedure that leads to resolution of symptoms.

References

Select your language of interest to view the total content in your interested language
Post your comment

Share This Article

Relevant Topics

Article Usage

  • Total views: 12304
  • [From(publication date):
    June-2013 - Jul 17, 2018]
  • Breakdown by view type
  • HTML page views : 8500
  • PDF downloads : 3804
 

Post your comment

captcha   Reload  Can't read the image? click here to refresh

Peer Reviewed Journals
 
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2018-19
 
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

Agri & Aquaculture Journals

Dr. Krish

[email protected]

+1-702-714-7001Extn: 9040

Biochemistry Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Business & Management Journals

Ronald

[email protected]

1-702-714-7001Extn: 9042

Chemistry Journals

Gabriel Shaw

[email protected]

1-702-714-7001Extn: 9040

Clinical Journals

Datta A

[email protected]

1-702-714-7001Extn: 9037

Engineering Journals

James Franklin

[email protected]

1-702-714-7001Extn: 9042

Food & Nutrition Journals

Katie Wilson

[email protected]

1-702-714-7001Extn: 9042

General Science

Andrea Jason

[email protected]

1-702-714-7001Extn: 9043

Genetics & Molecular Biology Journals

Anna Melissa

[email protected]

1-702-714-7001Extn: 9006

Immunology & Microbiology Journals

David Gorantl

[email protected]

1-702-714-7001Extn: 9014

Materials Science Journals

Rachle Green

[email protected]

1-702-714-7001Extn: 9039

Nursing & Health Care Journals

Stephanie Skinner

[email protected]

1-702-714-7001Extn: 9039

Medical Journals

Nimmi Anna

[email protected]

1-702-714-7001Extn: 9038

Neuroscience & Psychology Journals

Nathan T

[email protected]

1-702-714-7001Extn: 9041

Pharmaceutical Sciences Journals

Ann Jose

[email protected]

1-702-714-7001Extn: 9007

Social & Political Science Journals

Steve Harry

[email protected]

1-702-714-7001Extn: 9042

 
© 2008- 2018 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version