Wir möchten Dr. Wael El sacht, für Video-Clip, Dr. Clemens Wagner von VR Magie danken für seine moralische Unterstützung. Autoren persönliche Finanzierung.

1. Zweck Um zeigen eine Kapsulorhexis radial herausreißen Rettung Technik mit einem cystotome auf einer Virtual-Reality-Kataraktchirurgie Simulator und in ein menschliches Auge. 2. Methode Wenn ein Kapsulorhexis radial veer zur Peripherie jenseits der Pupillarrand beginnt die folgenden Schritte sollten unverzüglich angewandt werden. <ol><li> Stoppen Sie weitere Kapsulorhexis manövrieren und eine Neubewertung der Situation. </li><li> Füllen Sie die Vorderkammer mit ophthalmologischen viscosurgical Gerät (OVD). Wir empfehlen die Montage der cystotome eine Spritze mit OVD, so dass die vordere Kammer rasch wieder aufgeblasen werden. </li><li> Die Kapsulorhexis Klappe wird dann auf die Oberfläche der Linse nach links aufgeklappt. </li><li> Die cystotome Spitze ist horizontal zu vermeiden, Schneiden oder Punktion der Klappe gekippt und auf der Klappe in der Nähe der Vorderkante des Tränenfilms beteiligt, aber nicht zu dem Punkt der Riss zu schließen. </li><li> Schieben oder ziehen Sie die Vorderkante der Verschleiß gegenüber der Richtung zu reißen. </li><li> Die führenden Abrisskante startet ein &quot;U-Turn&quot; zu tun. Halten Sie die Spannung auf der Klappe, bis der Abrisskante zurück, um die gewünschte Flugbahn. </li></ol> 3. Ergebnisse Mit unserer Technik kann der Chirurg sofort reagieren zu radialen herausreißen, ohne chirurgische Instrumente zu ändern. Ändern chirurgische Instrumente in dieser kritischen Phase läuft die Gefahr einer weiteren radialen Verschleiß durch plötzliche Verflachung der Vorderkammer als Folge von Druck nach vorne aus dem Glaskörper. Unsere Technik hat auch den Vorteil der Reduzierung Hornhautwunde Verzerrung und anschließende Vorderkammer Zusammenbruch.

<ol>
	<li>Little, B. C., Smith, J. H., Packer, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=.">.</a> J Cataract Refract Surg. 32 (9), 1420-1422 (2006).</li><li>Neuhann, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Theorie+und+Operationstechnik+der+Kapsulorhexis.">Theorie und Operationstechnik der Kapsulorhexis.</a> Klin Monatsbl Augenheilkd. 190, 542-545 (1987).</li><li>Gimbel, H. V., Neuhann, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Development,+advantages+and+methods+of+the+continuous+circular+capsulorhexis+technique.">Development, advantages and methods of the continuous circular capsulorhexis technique.</a> J Cataract Refract Surg. 16, 31-37 (1990).</li><li>Gimbel, H. V., Neuhann, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Continuous+curvilinear+capsulorhexis.+(letter).">Continuous curvilinear capsulorhexis. (letter).</a> J Cataract Refract Sur. 17, 110-111 (1991).</li><li>Gimbel, H. V. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Evolving+techniques+of+cataract+surgery:+continuous+curvilinear+capsulorhexis,+down-slope+sculpting,+and+nucleofractis.">Evolving techniques of cataract surgery: continuous curvilinear capsulorhexis, down-slope sculpting, and nucleofractis.</a> Semin Ophthalmol. 7, 193-207 (1992).</li></ol>

Die EYESI Surgical Simulator ist ein realistisches Training Plattform für Chirurgen komplizierte Kapsulorhexis Praxis Reiß-Techniken. Capsulorhexis ist das wichtigste und komplexeste Teil der Phakoemulsifikation und endocapsular Intraokularlinse Implantation. Eine erfolgreiche Operation des Grauen Stars hängt von der Erreichung einer guten Kapsulorhexis. Während Kapsulorhexis können Chirurgen vor einer herausfordernden Situation wie ein Kapsulorhexis radiären Riss-out. Ein Chirurg muss lernen, das Problem umgehend...

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a novel technique of rescuing capsulorhexis radial tear-out using a cystotome

Teil 1: Zweck: Um eine Kapsulorhexis radial herausreißen Rettung Technik mit einem cystotome auf einer Virtual-Reality-Kataraktchirurgie Simulator und in ein menschliches Auge zu demonstrieren. Teil 2: Verfahren: Schritte: Wenn ein Kapsulorhexis radial veer zur Peripherie jenseits der Pupillarrand beginnt die folgenden Schritte sollten unverzüglich angewandt werden. 2,1) Stoppen Sie weitere Kapsulorhexis manövrieren und eine Neubewertung der Situation. 2,2) Füllen Sie die Vorderkammer mit ophthalmologischen viscosurgical Gerät (OVD). Wir empfehlen die Montage der cystotome eine Spritze mit OVD, so dass die vordere Kammer rasch wieder aufgeblasen werden. 2,3) Die Kapsulorhexis Klappe wird dann nach links aufgeklappt auf der Linsenoberfläche. 2,4) Die cystotome Spitze ist horizontal zu vermeiden, Schneiden oder Punktion der Klappe gekippt und auf der Klappe in der Nähe der Vorderkante des Tränenfilms beteiligt, aber nicht zu dem Punkt der Riss zu schließen. 2,5) Schieben oder Ziehen der Vorderkante der Verschleiß gegenüber der Richtung zu reißen. 2,6) Die führenden Abrisskante startet zu einem &quot;U-Turn&quot; zu tun. Halten Sie die Spannung auf der Klappe, bis der Abrisskante zurück, um die gewünschte Flugbahn. Teil 3: Ergebnisse: Mit unserer Technik kann der Chirurg sofort reagieren zu radialen herausreißen, ohne chirurgische Instrumente zu ändern. Ändern chirurgische Instrumente in dieser kritischen Phase läuft die Gefahr einer weiteren radialen Verschleiß durch plötzliche Verflachung der Vorderkammer als Folge von Druck nach vorne aus dem Glaskörper. Unsere Technik hat auch den Vorteil der Reduzierung Hornhautwunde Verzerrung und anschließende Vorderkammer Zusammenbruch. Teil 4: Diskussion Die EYESI Surgical Simulator ist ein realistisches Training Plattform für Chirurgen komplizierte Kapsulorhexis Praxis Reiß-Techniken. Capsulorhexis ist das wichtigste und komplexeste Teil der Phakoemulsifikation und endocapsular Intraokularlinse Implantation. Eine erfolgreiche Operation des Grauen Stars hängt von der Erreichung einer guten Kapsulorhexis. Während Kapsulorhexis können Chirurgen vor einer herausfordernden Situation wie ein Kapsulorhexis radiären Riss-out. Ein Chirurg muss lernen, das Problem umgehend lösen, ohne dass die Situation noch schlimmer. Einige andere Methoden der Rettung der Situation beschrieben worden mit einer Kapsulorhexis Pinzette. Allerdings glauben wir, unsere Methode ist schneller, effektiver und leichter zu handhaben als die EYESI chirurgischen Simulator und auf eine menschliche Auge unter Beweis gestellt. Danksagung: Liste Bestätigungen und Finanzierungsquellen. Wir möchten Dr. Wael El sacht, für Video-Clip zu danken. Angaben: beschreiben potenzielle Interessenkonflikte oder staatlich Wir haben nichts zu offenbaren. Referenzen: 1. Brian C. Little, Jennifer H. Smith, Mark Packer. J Cataract Refract Surg 2006; 32:1420 1422, Issue-9. 2. Neuhann T. Theorie und Operationstechnik der Kapsulorhexis. Klin Monatsbl Augenheilkd. 1987; 1990: 542-545. 3. Gimbel HV, Neuhann T. Entwicklung, Vorteile und Methoden der kontinuierlichen kreisförmigen Kapsulorhexis Technik. J Cataract Refract Surg. 1990; 16: 31-37. 4. Gimbel HV, Neuhann T. Continuous krummlinigen Kapsulorhexis. (Brief) J Cataract Refract Sur. 1991; 17: 110-111.

Watch this Scientific Journal Video about A Novel Technique of Rescuing Capsulorhexis Radial Tear-out using a Cystotome at JoVE.com

A Novel Technique of Rescuing Capsulorhexis Radial Tear-out using a Cystotome

Capsulorhexis ist ein wichtiger Schritt in Phakoemulsifikation Chirurgie. Ein Chirurg schafft einen kontinuierlichen krummlinigen Träne auf der vorderen Linsenkapsel durch die Steuerung der Reißen Kraftvektoren. Ein peripher erweitert Träne ist eine ernste Komplikation. Dieses Video zeigt eine neuartige Technik zur Rettung Kapsel radial herausreißen mit einem cystotome.

Eine neuartige Technik der Rettung Capsulorhexis Radial Tear-out mit einem Cystotome

Part 1 : Purpose:   To demonstrate a capsulorhexis radial tear out rescue technique using a cystotome on a virtual reality cataract surgery simulator and ...

a-novel-technique-rescuing-capsulorhexis-radial-tear-out-using

Research

JoVE Journal

Medicine

13.2K Aufrufe.  Hairmyres Hospital, NHS Lanarkshire. Capsulorhexis ist ein wichtiger Schritt in Phakoemulsifikation Chirurgie. Ein Chirurg schafft einen kontinuierlichen krummlinigen Träne auf der vorderen Linsenkapsel durch die Steuerung der Reißen Kraftvektoren. Ein peripher erweitert Träne ist eine ernste Komplikation. Dieses Video zeigt eine neuartige Technik zur Rettung Kapsel radial herausreißen mit einem cystotome.

Serie: A Novel Technique of Rescuing Capsulorhexis Radial Tear-out using a Cystotome

A Novel Rescue Technique for Difficult Intubation and Difficult Ventilation

We describe a novel non surgical technique to maintain oxygenation and ventilation in a case of difficult intubation and difficult ventilation, which works especially well with poor mask fit.
Can not intubate, can not ventilate" (CICV) is a potentially life threatening situation. In this video we present a simulation of the technique we used in a case of CICV where oxygenation and ventilation were maintained by inserting an endotracheal tube (ETT) nasally down to the level of the naso-pharynx while sealing the mouth and nares for successful positive pressure ventilation.
A 13 year old patient was taken to the operating room for incision and drainage of a neck abcess and direct laryngobronchoscopy. After preoxygenation, anesthesia was induced intravenously. Mask ventilation was found to be extremely difficult because of the swelling of the soft tissue. The face mask could not fit properly on the face due to significant facial swelling as well. A direct laryngoscopy was attempted with no visualization of the larynx. Oxygen saturation was difficult to maintain, with saturations falling to 80%. In order to oxygenate and ventilate the patient, an endotracheal tube was then inserted nasally after nasal spray with nasal decongestant and lubricant. The tube was pushed gently and blindly into the hypopharynx. The mouth and nose of the patient were sealed by hand and positive pressure ventilation was possible with 100% O2 with good oxygen saturation during that period of time. Once the patient was stable and well sedated, a rigid bronchoscope was introduced by the otolaryngologist showing extensive subglottic and epiglottic edema, and a mass effect from the abscess, contributing to the airway compromise. The airway was secured with an ETT tube by the otolaryngologist.This video will show a simulation of the technique on a patient undergoing general anesthesia for dental restorations.

We describe a technique to maintain oxygenation and ventilation using an endotracheal tube inserted nasally to the level of the naso-pharynx while sealing the mouth and nares for successful positive pressure ventilation.

A Novel Rettungs-Technik für die schwierige Intubation und Beatmung Schwierige

We describe a novel non surgical technique to maintain oxygenation and ventilation in a case of difficult intubation and difficult ventilation, which ...

Forschung

Medizin

A Novel Capsulorhexis Technique Using Shearing Forces with Cystotome

Purpose:
To demonstrate a capsulorhexis technique using predominantly shearing forces with a cystotome on a virtual reality simulator and on a human eye.
Method:
Our technique involves creating the initial anterior capsular tear with a cystotome to raise a flap. The flap left unfolded on the lens surface. The cystotome tip is tilted horizontally and is engaged on the flap near the leading edge of the tear. The cystotome is moved in a circular fashion to direct the vector forces. The loose flap is constantly swept towards the centre so that it does not obscure the view on the tearing edge.
Results:
Our technique has the advantage of reducing corneal wound distortion and subsequent anterior chamber collapse. The capsulorhexis flap is moved away from the tear leading edge allowing better visualisation of the direction of tear. This technique offers superior control of the capsulorhexis by allowing the surgeon to change the direction of the tear to achieve the desired capsulorhexis size.
Conclusions:
The EYESI Surgical Simulator is a realistic training platform for surgeons to practice complex capsulorhexis techniques. The shearing forces technique is a suitable alternative and in some cases a far better technique in achieving the desired capsulorhexis.

This video demonstrates a novel capsulorhexis technique in modern cataract surgery. Capsulorhexis is the most difficult and important part of phacoemulsification surgery.

A Novel Capsulorhexis Technik unter Verwendung von Scherkräften mit Cystotome

Purpose:
To demonstrate a capsulorhexis technique using predominantly shearing forces with a cystotome on a virtual reality simulator and on a human eye....

Corneal Confocal Microscopy: A Novel Non-invasive Technique to Quantify Small Fibre Pathology in Peripheral Neuropathies

The accurate quantification of peripheral neuropathy is important to define at risk patients, anticipate deterioration, and assess new therapies. Conventional methods assess neurological deficits and electrophysiology and quantitative sensory testing quantifies functional alterations to detect neuropathy. However, the earliest damage appears to be to the small fibres and yet these tests primarily assess large fibre dysfunction and have a limited ability to demonstrate regeneration and repair. The only techniques which allow a direct examination of unmyelinated nerve fibre damage and repair are sural nerve biopsy with electron microscopy and skin-punch biopsy. However, both are invasive procedures and require lengthy laboratory procedures and considerable expertise. Corneal Confocal microscopy is a non-invasive clinical technique which provides in-vivo imaging of corneal nerve fibres. We have demonstrated early nerve damage, which precedes loss of intraepidermal nerve fibres in skin biopsies together with stratification of neuropathic severity and repair following pancreas transplantation in diabetic patients. We have also demonstrated nerve damage in idiopathic small fibre neuropathy and Fabry's disease.

Corneal Confocal microscopy is a non-invasive clinical technique which may be used to quantify C fibre damage to diagnose and stratify patients with increasing neuropathic severity.

Corneal konfokale Mikroskopie: A Novel Non-invasive Technik zu Small Fibre Pathologie in peripheren Neuropathien Quantify

The accurate quantification of peripheral neuropathy is important to define at risk patients, anticipate deterioration, and assess new therapies. ...

A Novel Application of Musculoskeletal Ultrasound Imaging

Ultrasound is an attractive modality for imaging muscle and tendon motion during dynamic tasks and can provide a complementary methodological approach for biomechanical studies in a clinical or laboratory setting. Towards this goal, methods for quantification of muscle kinematics from ultrasound imagery are being developed based on image processing. The temporal resolution of these methods is typically not sufficient for highly dynamic tasks, such as drop-landing. We propose a new approach that utilizes a Doppler method for quantifying muscle kinematics. We have developed a novel vector tissue Doppler imaging (vTDI) technique that can be used to measure musculoskeletal contraction velocity, strain and strain rate with sub-millisecond temporal resolution during dynamic activities using ultrasound. The goal of this preliminary study was to investigate the repeatability and potential applicability of the vTDI technique in measuring musculoskeletal velocities during a drop-landing task, in healthy subjects. The vTDI measurements can be performed concurrently with other biomechanical techniques, such as 3D motion capture for joint kinematics and kinetics, electromyography for timing of muscle activation and force plates for ground reaction force. Integration of these complementary techniques could lead to a better understanding of dynamic muscle function and dysfunction underlying the pathogenesis and pathophysiology of musculoskeletal disorders.

We describe a new ultrasound-based vector tissue Doppler imaging technique to measure muscle contraction velocity, strain and strain rate with sub-millisecond temporal resolution during dynamic activities. This approach provides complementary measurements of dynamic muscle function and could lead to a better understanding of mechanisms underlying musculoskeletal disorders.

A Novel Anwendung von Muskel-Skelett-Ultraschall-Bildgebung

Ultrasound is an attractive modality for imaging muscle and tendon  motion during dynamic tasks and can provide a complementary methodological  approach ...

Human Skeletal Muscle Biopsy Procedures Using the Modified Bergstr&#246;m Technique

The percutaneous biopsy technique enables researchers and clinicians to collect skeletal muscle tissue samples. The technique is safe and highly effective. This video describes the percutaneous biopsy technique using a modified Bergstr&#246;m needle to obtain skeletal muscle tissue samples from the vastus lateralis of human subjects. The Bergstr&#246;m needle consists of an outer cannula with a small opening (&#8216;window&#8217;) at the side of the tip and an inner trocar with a cutting blade at the distal end. Under local anesthesia and aseptic conditions, the needle is advanced into the skeletal muscle through an incision in the skin, subcutaneous tissue, and fascia. Next, suction is applied to the inner trocar, the outer trocar is pulled back, skeletal muscle tissue is drawn into the window of the outer cannula by the suction, and the inner trocar is rapidly closed, thus cutting or clipping the skeletal muscle tissue sample. The needle is rotated 90&#176;&#160;and another cut is made. This process may be repeated three more times. This multiple cutting technique typically produces a sample of 100-200 mg or more in healthy subjects and can be done immediately before, during, and after a bout of exercise or other intervention. Following post-biopsy dressing of the incision site, subjects typically resume their activities of daily living right away and can fully participate in vigorous physical activity within 48-72 hr. Subjects should avoid heavy resistance exercise for 48 hr to reduce the risk of herniation of the muscle through the incision in the fascia.

Human Skeletal Muscle Biopsy Procedures Using the Modified Bergstr&amp;#246;m Technique

The purpose of this video is to present the modified Bergstr&#246;m skeletal muscle biopsy technique on human subjects.

Menschlichen Skelettmuskelbiopsie Verfahren unter Verwendung der modifizierten Technik Bergström

The percutaneous biopsy technique enables researchers and clinicians to collect skeletal muscle tissue samples. The technique is safe and highly ...

Circumscribed Capsular Infarct Modeling Using a Photothrombotic Technique

Recent increase in the prevalence rate of white matter stroke demands specific research in the field. However, the lack of a pertinent animal model for white matter stroke has hampered research investigations. Here, we describe a novel method for creating a circumscribed capsular infarct that minimizes damage to neighboring gray matter structures. We used pre-surgery neural tracing with adeno-associated virus-green fluorescent protein (AAV-GFP) to identify somatotopic organization of the forelimb area within the internal capsule. The adjustment of light intensity based on different optical properties of gray and white matter contributes to selective destruction of white matter with relative preservation of gray matter. Accurate positioning of optical-neural interface enables destruction of entire forelimb area in the internal capsule, which leads to a marked and persistent motor deficit. Thus, this technique produces highly replicable capsular infarct lesions with a persistent motor deficit. The model will be helpful not only to study white matter stroke (WMS) at the behavioral, circuit, and cellular levels, but also to assess its usefulness for development of new therapeutic and rehabilitative interventions.

This manuscript describes a modeling technique of capsular infarct. Here we utilized a modified photothrombotic technique with low intensity of light after pre-surgery target mapping. Using this technique, we created a circumscribed capsular infarct model with persistent motor impairment.

Umschriebene Capsular Infarkt Modellierung einer Photothrombotic unter Verwendung der Technik

Recent increase in the prevalence rate of white matter stroke demands specific research in the field. However, the lack of a pertinent animal model for ...

A Detailed Protocol for Perspiration Monitoring Using a Novel, Small, Wireless Device

Perspiration monitoring can be utilized for the detection of certain diseases, such as thermoregulation and mental disorders, particularly when the patients are unaware of such disorders or are having difficulty expressing their symptoms. Until now, several devices for perspiration monitoring have been developed; however, such devices tend to have a relatively large exterior, considerable power consumption, and/or less sensitivity.
Recently, we developed a small, wireless device for perspiration monitoring. The device consists of a temperature/relative humidity (T/RH) sensor, battery-driven small data logger, and silica gel as a desiccant in a small cylindrical exterior. The T/RH sensor is placed between the detection windows (through which the water vapor from the skin enters) and the silica gel. The underlying principle of the perspiration monitoring device is based on Fick&#39;s law of diffusion, which means that water vapor flux from the skin to the silica gel (i.e.&#160;transepidermal water loss and perspiration) can be captured by change in humidity at the T/RH sensor. In addition, a baseline subtraction method was adopted to distinguish perspiration and transepidermal water loss.
As shown in the previous report, the developed device can monitor the perspiration at any sites of the body in an easy, wireless manner. However, detailed methods of how to use the device have not been disclosed yet. In this article, therefore, we would like to show the point-by-point tutorials of how to use the device for perspiration monitoring, by showing the sympathetic activity test with the sympathetic skin response monitoring as an example.

Recently, we developed a small wireless device for perspiration monitoring. In this article, we present detailed protocols on how to use the device for perspiration monitoring with an example of the sympathetic activity test.

Ein detailliertes Protokoll für Transpiration Überwachung eines neuartigen Verwendung, Klein, Wireless Device

Perspiration monitoring can be utilized for the detection of certain diseases, such as thermoregulation and mental disorders, particularly when the ...

Mouse Model for Pancreas Transplantation Using a Modified Cuff Technique

Mouse models have several advantages in transplantation research, including easy handling, a variety of genetically well-defined strains, and the availability of the widest range of molecular probes and reagents to perform in vivo as well as in vitro studies. Based on our experience with various murine transplantation models, we developed a heterotopic pancreas transplantation model in mice with the intent to analyze mechanisms underlying severe ischemia reperfusion injury-associated early graft damage. In contrast to previously described techniques using suture techniques, herein we describe a new procedure using a non-suture cuff technique. 
In recent years, we have performed more than 300 pancreas transplantations in mice with an overall success rate of &gt;90%, a success rate never described before in mouse pancreas transplantation. The backbone of this non-suture cuff technique for graft revascularization consists of two major steps: (I) pulling the recipient vessel over a polyethylene/polyamide cuff and fixing it with a circumferential ligature, and (II) placing the donor vessel over the everted recipient vessel and fixing it with a second circumferential ligature. The resultant continuity of the endothelial layer results in less thrombogenic lesions with high patency rates and, finally, high success rates.
In this model, arterial anastomosis is achieved by pulling the abdominal aorta of the donor graft over the everted common carotid artery of the recipient animal. Venous drainage of the graft is achieved by pulling the portal vein of the graft over the everted external jugular vein of the recipient. This manuscript provides details and crucial steps of the organ recovery and organ implantation procedures, which will allow researchers with microsurgical skills to perform the transplantation successfully in their laboratories.

Among abdominal solid organ transplantation, pancreatic grafts are prone to develop severe ischemia reperfusion injury-associated graft damage, leading eventually to early graft loss. This protocol describes a model of murine pancreas transplantation using a non-suture cuff technique, ideally suited for analyzing these early, deleterious damages.

Maus-Modell für die Bauchspeicheldrüse Transplantation mit einer modifizierten Manschette-Technik

Mouse models have several advantages in transplantation research, including easy handling, a variety of genetically well-defined strains, and the ...

Minimally Invasive Muscle Embedding (MIME) - A Novel Experimental Technique to Facilitate Donor-Cell-Mediated Myogenesis

Skeletal muscle possesses regenerative capacity due to tissue-resident, muscle-fiber-generating (myogenic) satellite cells (SCs), which can form new muscle fibers under the right conditions. Although SCs can be harvested from muscle tissue and cultured in vitro, the resulting myoblast cells are not very effective in promoting myogenesis when transplanted into host muscle. Surgically exposing the host muscle and grafting segments of donor muscle tissue, or the isolated muscle fibers with their SCs onto host muscle, promotes better myogenesis compared to myoblast transplantation. We have developed a novel technique that we call Minimally Invasive Muscle Embedding (MIME). MIME involves passing a surgical needle through the host muscle, drawing a piece of donor muscle tissue through the needle track, and then leaving the donor tissue embedded in the host muscle so that it may act as a source of SCs for the host muscle. Here we describe in detail the steps involved in performing MIME in an immunodeficient mouse model that expresses a green fluorescent protein (GFP) in all of its cells. Immunodeficiency in the host mouse reduces the risk of immune rejection of the donor tissue, and GFP expression enables easy identification of the host muscle fibers (GFP+) and donor-cell-derived muscle fibers (GFP-). Our pilot data suggest that MIME can be used to implant an extensor digitorum longus (EDL) muscle from a donor mouse into the tibialis anterior (TA) muscle of a host mouse. Our data also suggest that when a myotoxin (barium chloride, BaCl2) is injected into the host muscle after MIME, there is evidence of donor-cell-derived myogenesis in the host muscle, with approximately 5%, 26%, 26% and 43% of the fibers in a single host TA muscle showing no host contribution, minimal host contribution, moderate host contribution, and maximal host contribution, respectively.

Minimally Invasive Muscle Embedding MIME - A Novel Experimental Technique to Facilitate Donor-Cell-Mediated Myogenesis

We describe a novel experimental technique that we call Minimally Invasive Muscle Embedding (MIME), which is based on the evidence that skeletal muscle tissue contains viable myogenic cells that can facilitate donor-cell-mediated myogenesis when implanted into a host muscle.

Minimal-Invasive Muskel einbetten (MIME) - eine neuartige experimentelle Technik, Spender-Zell-vermittelten Myogenesis zu erleichtern

Skeletal muscle possesses regenerative capacity due to tissue-resident, muscle-fiber-generating (myogenic) satellite cells (SCs), which can form new ...

Cardiopulmonary Bypass in a Mouse Model: A Novel Approach

As prolonged cardiopulmonary bypass becomes more essential during cardiac interventions, an increasing clinical demand arises for procedure optimization and for minimizing organ damage resulting from prolonged extracorporal circulation. The goal of this paper was to demonstrate a fully functional and clinically relevant model of cardiopulmonary bypass in a mouse. We report on the device design, perfusion circuit optimization, and microsurgical techniques. This model is an acute model, which is not compatible with survival due to the need for multiple blood drawings. Because of the range of tools available for mice (e.g., markers, knockouts, etc.), this model will facilitate investigation into the molecular mechanisms of organ damage and the effect of cardiopulmonary bypass in relation to other comorbidities.

This paper describes how to perform cardiopulmonary bypass in mice. This novel model will facilitate the investigation of the molecular mechanisms involved in organ damage.

Kardiopulmonalen Bypass in einem Mausmodell: ein neuer Ansatz

As prolonged cardiopulmonary bypass becomes more essential during cardiac interventions, an increasing clinical demand arises for procedure optimization ...