Design of Efficient Inductive Power Link with Small Size Planar Spiral Coil Receiver for Medical Applications

The efficiency of a WPT system greatly depends on both the geometry and operating frequency of the transmitting and receiving structures. Genetic optimizations algorithms are presented to prepare the proposed design parameters using MATLAB to optimize the link efficiency. Single and double layer PSCs are optimally designed with minimal proximity losses effect. In this paper, we used the benefit of a double layer technique to miniaturize the receiver PCS size. The proposed single layer (10×10) mm2 and double layer (8×8) mm2 PSCs are validated and simulated using HFSS 15.03 software at a frequency of 13.56MHz in both cases of the air, and human biological skin tissue as intermediate material between the transmitter and receiver PSCs. The calculated and simulated results of both proposed receiver PSCs are compared for both cases of intermediate materials for their efficiency behaviors. The results show that in the case of biological tissue, the deterioration in PTE using 8mm double layer receiver is only 6.5 % (PTE =70.96%), which is less than 13.5 % (PTE=68.6%) using single layer 10mm receiver. A comparative survey has been done for similar works of different authors in the last decade. In comparison with other works, the proposed double layer (8×8) mm2 PSCs is smaller in size and more efficient for use in the IMDs.

Download Full-text

Single Layer Versus Double Layer Anastomosis of Small Intestine – A Comparative Study from Karnataka, India

Journal of Evolution of Medical and Dental Sciences ◽

10.14260/jemds/2021/470 ◽

2021 ◽

Vol 10 (30) ◽

pp. 2300-2304

Author(s):

Tejaswini Murari Pawar ◽

Ravikiran Hosur Ramamurthy ◽

Shashirekha Chikkavenkataswamy Anjaneyulu

Keyword(s):

Hospital Stay ◽

Double Layer ◽

Suture Material ◽

Intestinal Anastomosis ◽

Single Layer ◽

Absorbable Suture ◽

Duration Of Hospital Stay ◽

Absorbable Suture Material ◽

Significant Difference ◽

Layer Technique

BACKGROUND Intestinal anastomosis is an operative procedure that is of importance in the practice of surgery. It is a very commonly performed technique in today’s surgical era. We wanted to study the postoperative complications like anastomotic leak and abscess formation and duration of hospital stay in single layer and double layer anastomosis and compare the same. METHODS In our prospective observational study, 80 patients were reviewed and were divided into 2 groups. Cases were allotted to either group based on the odd even method requiring single- and double-layer anastomosis, odd being single layer and even being double layer anastomosis. Intestinal anastomosis was carried out in single layer technique with delayed absorbable suture material and double layer technique with inner transmural layer with delayed absorbable suture material and seromuscular layer with non-absorbable suture material. RESULTS Each group had 40 patients, there was significant difference noted between the groups. Mean duration of hospital stay in single layer group was 17.85 ± 7.62 days and in double layer group was 26.20 ± 16.12 days (P = 0.043 *). In single group, mean time taken for anastomosis was 18.50 ± 1.73 and in double group was 29.05 ± 2.19. There was significant difference in time taken between two groups (P < 0.001). In single group, majority of subjects had no anastomotic Leak (95 %) and 5 % had leak. In double group 70 % had no leak and 30 % had leak. P value was statistically significant (P = 0.037). CONCLUSIONS Single layer anastomosis was better in terms of duration of hospital stay, postoperative anastomotic leaks and time taken for anastomosis. KEY WORDS Single Layer, Double Layer, Small Bowel, Duration of Hospital Stay, Anastomotic Leaks

Download Full-text

Catheter Taping Methods—Single-Layer Versus Reinforced Double-Layer Technique

Regional Anesthesia and Pain Medicine ◽

10.1097/aap.0000000000000512 ◽

2017 ◽

Vol 42 (1) ◽

pp. 128-130

Author(s):

Jeremy H. Tsui ◽

Luke W. Murtha ◽

Ban Chi-ho Tsui

Keyword(s):

Double Layer ◽

Single Layer ◽

Layer Versus ◽

Layer Technique

Download Full-text

Small intestine anastomosis by full thickness, single layer and interrupted suture technique: results of a comparative study

International Surgery Journal ◽

10.18203/2349-2902.isj20190813 ◽

2019 ◽

Vol 6 (3) ◽

pp. 675

Author(s):

Shobhit K. Nemma ◽

Sarbjeet Singh ◽

Amritpal Singh Rana ◽

Rohit Kapoor ◽

Puneet Bansal

Keyword(s):

Small Intestine ◽

Double Layer ◽

Single Layer ◽

Stoma Closure ◽

Full Thickness ◽

Layer Technique ◽

Group A ◽

The Mean ◽

The Difference ◽

Group B

Background: Since the dawn of surgery intestinal anastomosis has remained a controversial topic in respect to suture material, anastomotic technique, distance between stitches and borders. Technique of anastomosis is an important determinant in process of anastomosis healing. Despite a large amount of work done on anastomosis techniques, a clear superiority of one technique over another has not been established.Methods: Patients of ileostomy reporting to surgery department for stoma closure were used for study. 80 patients of ileostomy reporting for stoma closure were used as material for the study and randomized in two groups. In single layer group, using 3-0 silk suture, we performed small intestine anastomosis applying single layer of interrupted sutures taking full thickness bite. In double layer group, anastomosis was performed anastomosis by applying first layer of full thickness sutures and second layer of seromuscular sutures. The results were compared in terms of operative time, post operative complications, mortality, hospital stay and cost of the suture material.Results: The mean age of the patients was 33.55 yr in group A (single layer) and 35.85 yr in group B (double layer). Total 7 patients developed anastomotic leak. 5 (12.5%) patients were with double layer anastomosis and 2 (5%) patients were in single layer group. The difference in anastomosis leak in two groups was statistically insignificant (p = 0.232). The mean duration of whole procedure in group A (single layer) was 52.5min and 71.5min in group B (double layer). The difference in mean duration of the procedure was found to statistically significant (P = 0.00).Conclusions: We concluded the single layer technique to be a safe, efficient and more cost effective as compared to double layer technique.

Download Full-text

Dynamic Countermeasure Fabrics for Post-Spaceflight Orthostatic Intolerance

Aerospace Medicine and Human Performance ◽

10.3357/amhp.5560.2020 ◽

2020 ◽

Vol 91 (6) ◽

pp. 525-531 ◽

Cited By ~ 1

Author(s):

Rachael M. Granberry ◽

Kevin P. Eschen ◽

Amy J. Ross ◽

Julianna M. Abel ◽

Bradley T. Holschuh

Keyword(s):

Double Layer ◽

High Performance ◽

Orthostatic Intolerance ◽

Dynamic Compression ◽

Single Layer ◽

Design Parameters ◽

Layer System ◽

Compression Garments ◽

Air Supply ◽

Low Profile

INTRODUCTION: Aerospace orthostatic intolerance garments (OIG) have historically been pneumatic (e.g., NASA’s antigravity suit), an approach that inhibits mobility and requires connection to an air supply. Elastic compression garments, an alternative technology, are difficult to don/doff and cannot be worn in a noncompressive state, resulting in discomfort and usability challenges. This research evaluates a novel technology—contractile shape memory alloy (SMA) knitted actuators—that can enable low-profile, dynamic compression for an aerospace OIG.METHODS: To characterize the functional capabilities of SMA knitted actuators, displacement control testing was conducted on 10 actuator samples with a range of geometric design parameters. Inactive (FI) and actuated forces (FA) were observed by repeatedly thermally cycling each sample at 0%, 15%, 30%, and 45% structural strain. Compression capabilities were approximated using medical compression hosiery standards and anthropometric data from a representative aerospace population (ANSUR 2012).RESULTS: Dynamic compression predictions reached 52 mmHg (single layer fabric) and 105 mmHg (double layer fabric) at the ankle. Low, inactive pressures (p < 20 mmHg) demonstrate that compression is controllable and can be dynamically increased upon actuation up to 33 mmHg in a single layer system and up to 67 mmHg in a double layer system.DISCUSSION: The results highlight the potential of SMA knitted actuators to enable low-profile, dynamic compression garments that can reach medically therapeutic pressures on an aerospace population to counteract OI symptoms. In addition to astronautic applications, this technology demonstrates widespread terrestrial medical and high-performance aircraft applicability.Granberry RM, Eschen KP, Ross AJ, Abel JM, Holschuh BT. Dynamic countermeasure fabrics for post-spaceflight orthostatic intolerance. Aerosp Med Hum Perform. 2020; 91(6):525–531.

Download Full-text

A Comparative Study of Single Layer Versus Double layer Intestinal Anastomosis

Medical Journal of Pokhara Academy of Health Sciences ◽

10.3126/mjpahs.v1i2.23403 ◽

2018 ◽

Vol 1 (2) ◽

pp. 98-101 ◽

Cited By ~ 1

Author(s):

Amar Gurung ◽

Santosh Shrestha ◽

Devendra Shrestha ◽

Suresh Raj Paudel ◽

David Shrestha ◽

...

Keyword(s):

Comparative Study ◽

Anastomotic Leak ◽

Double Layer ◽

Intestinal Anastomosis ◽

Single Layer ◽

Regional Hospital ◽

Layer Versus ◽

Layer Technique ◽

Postoperative Anastomotic Leak ◽

Western Regional

Objective: To determine the efficacy of single layer intestinal anastomosis to double layer technique in terms of anastomotic healing. Materials and Methods: Fifty patients who underwent intestinal anastomosis in the Department of Surgery, Western Regional Hospital from June 2014 to May 2016 were taken for this comparative study and divided equally in two groups, 25 each (single layer and double layer). Results: Of the total fifty cases, twenty-five cases included in each group, there was no leakage in single layer group while 1 patient had leakage in double layer group which was statistically insignificant. Conclusion: Single layer interrupted intestinal anastomosis is simple to carry out and is as efficacious as double layer anastomosis in terms of postoperative anastomotic leak.

Download Full-text

Cracking at the fold in double layer coated paper: the influence of latex and starch composition

TAPPI Journal ◽

10.32964/tj18.2.93 ◽

2019 ◽

Vol 18 (2) ◽

pp. 93-99

Author(s):

SEYYED MOHAMMAD HASHEMI NAJAFI ◽

DOUGLAS BOUSFIELD, ◽

MEHDI TAJVIDI

Keyword(s):

Mechanical Properties ◽

Double Layer ◽

Starch Content ◽

Single Layer ◽

Double Layers ◽

Coated Paper ◽

Coated Papers ◽

Coating Layers ◽

Scanned Images ◽

Packaging Paper

Cracking at the fold of publication and packaging paper grades is a serious problem that can lead to rejection of product. Recent work has revealed some basic mechanisms and the influence of various parameters on the extent of crack area, but no studies are reported using coating layers with known mechanical properties, especially for double-coated systems. In this study, coating layers with different and known mechanical properties were used to characterize crack formation during folding. The coating formulations were applied on two different basis weight papers, and the coated papers were folded. The binder systems in these formulations were different combinations of a styrene-butadiene latex and mixtures of latex and starch for two different pigment volume concentrations (PVC). Both types of papers were coated with single and double layers. The folded area was scanned with a high-resolution scanner while the samples were kept at their folded angle. The scanned images were analyzed within a constant area. The crack areas were reported for different types of papers, binder system and PVC values. As PVC, starch content, and paper basis weight increased, the crack area increased. Double layer coated papers with high PVC and high starch content at the top layer had more cracks in comparison with a single layer coated paper, but when the PVC of the top layer was low, cracking area decreased. No measurable cracking was observed when the top layer was formulated with a 100% latex layer.

Download Full-text